CN114370758A - Reciprocating swing type belt conveyor and method for preprocessing iron ore lump ore by using same - Google Patents

Reciprocating swing type belt conveyor and method for preprocessing iron ore lump ore by using same Download PDF

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CN114370758A
CN114370758A CN202110320936.2A CN202110320936A CN114370758A CN 114370758 A CN114370758 A CN 114370758A CN 202110320936 A CN202110320936 A CN 202110320936A CN 114370758 A CN114370758 A CN 114370758A
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type belt
distribution plate
swing type
belt conveyor
heat medium
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CN114370758B (en
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赵强
魏进超
马钟琛
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/26—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by reciprocating or oscillating conveyors propelling materials over stationary surfaces; with movement performed by reciprocating or oscillating shelves, sieves, or trays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/02—Applications of driving mechanisms, not covered by another subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/08—Granular materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Microbiology (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention provides a reciprocating swing type belt conveyor, which comprises a distribution plate (101), a horizontal driving device (102) and a swing driving device (103). Wherein: the horizontal driving device (102) is connected with the distribution plate (101) and drives the distribution plate (101) to move along the length direction of the reciprocating swing type belt conveyor (1); the swing drive device (103) is connected to the distribution plate (101) and drives the distribution plate (101) to swing in the width direction of the reciprocating swing type belt conveyor (1). The reciprocating swing type belt conveyor is provided with a heat medium inlet (104), a heat medium outlet (105), a material inlet (106) and a material outlet (107). The distribution plate (101) is provided with a sieve hole (10101). The reciprocating swing type belt machine solves the problem of raw material charging, improves the charging proportion and the air permeability level of the raw material of the blast furnace, effectively reduces the production cost of the blast furnace and improves the smooth level of the blast furnace.

Description

Reciprocating swing type belt conveyor and method for preprocessing iron ore lump ore by using same
Technical Field
The invention relates to a lump ore pretreatment device and a process thereof, in particular to a reciprocating swing type belt conveyor and a method for pretreating iron ore lump ore by using the same, belonging to the technical field of iron and steel smelting.
Background
The consumption of steel as an irreplaceable structural and functional material in the industrialization process occupies more than 95 percent of the total consumption of metal in a long time. The raw pig iron materials required by the iron and steel industry are mainly provided by blast furnace smelting, and the improvement of the blast furnace smelting technology and the reduction of the cost have profound significance for promoting the development of iron and steel enterprises. The basic link of blast furnace intensified smelting is fine material operation, natural lump ore is used as one of the main components of the charging material, and the addition amount of the natural lump ore can reach 30 percent at most. Because the moisture content of the lump ore is high, after the high-moisture lump ore enters the furnace, the moisture drying needs to consume energy, the drying process needs a certain time, and the coke ratio of the blast furnace is improved, so that the air permeability of a blast furnace charge layer is influenced, the smelting cost of the blast furnace is increased, and the furnace condition is influenced to be stable. Therefore, the reduction of the moisture content of the lump ore has important significance for reducing the iron-making cost and enhancing the stability of the furnace condition. At present, lump ore drying systems have the difficult problems of high construction cost, low drying efficiency, high energy consumption and the like.
Common furnace charging materials for blast furnaces include sintered ores, pellets and natural lump ores. The reasonable blast furnace charging material structure is that the optimum matching proportion of different types of iron-containing ores is found out by adjusting the proportion of sintered ores, pellets and natural lump ores in the iron ores fed into the furnace, so that various economic and technical indexes of blast furnace smelting under the charging material structure are relatively ideal, and the consumption cost of unit pig iron smelting is relatively lowest. Research shows that the cost expenditure of iron ore and other raw material links accounts for about 60% of the total pig iron cost, the market price of lump ore is basically equal to that of fine ore, the cost price is far lower than that of sinter and pellet ore, and the improvement of the charging proportion of the lump ore is an effective measure for reducing the raw material cost of a blast furnace. At present, the charging proportion of lump ore is generally 5-15%, and the proportion is low. The reason for this is that iron ore lump ore has a problem of high powder and moisture content. The content of iron ore lump ore powder (material with the particle size smaller than 8 mm) is generally 10-30%, and if the lump ore with high powder content is not screened and directly enters a blast furnace system, the harm to the air permeability of a blast furnace charge layer is serious, the blast furnace smelting coke ratio is improved, and the production index of the blast furnace is reduced. The water content of the iron ore lump ore is generally 8-15%, and the water content of the lump ore in rainy season of individual port steel mills even exceeds 20%. After the high-moisture lump ore is fed into the furnace, energy is consumed for moisture drying, a certain time is needed in the drying process, and the coke ratio of the blast furnace is improved.
At present, effective grading and finishing of iron ore blocks are difficult to realize by a pre-iron screening technology due to high dust rate of the iron ore blocks. Because the moisture content of the iron ore lump ore is high, the screening effect is not ideal, so that the fine ore adhered to the surface of the iron ore lump ore finally enters the blast furnace, the air permeability of the blast furnace is influenced, the smelting cost of the blast furnace is increased, and the stability of the furnace condition is influenced. (1) The iron ore lump ore is directly fed into the furnace without being pretreated. Because the iron ore lump ore powder content is high and the moisture content is large, the lump ore which is not pretreated directly enters the furnace, so that the energy is consumed, the coke ratio of the blast furnace is improved, the air permeability level of the blast furnace is reduced, the normal production of the blast furnace is influenced, and the influence on the smooth operation of the steel process and the economic benefit of a steel mill is obvious. (2) The iron ore lump ore is directly fed into the furnace after being screened and pretreated. The iron ore lump ore after the screening pretreatment has high moisture content, energy is consumed for moisture drying after the iron ore lump ore is directly fed into the furnace, a certain time is required in the drying process, and the coke ratio of the blast furnace is improved. (3) Iron ore blocks are subjected to cylinder drying pretreatment and directly fed into a furnace. The content of lump ore powder after the cylinder drying pretreatment is still higher, and after the high-powder iron ore lump ore enters the furnace, the air permeability level of the blast furnace is reduced, the normal production of the blast furnace is influenced, and the influence on the smooth operation of the steel process and the economic benefit of a steel plant is obvious. The cylinder drying investment is large, the operation cost is high, the iron ore lump ores are crushed due to mutual extrusion in the drying process to generate new powder, and the influence on the air permeability of the blast furnace is large after the iron ore lump ores are fed into the furnace.
Therefore, the reduction of the water content in the iron ore lump ore has important significance for reducing the iron-making cost and enhancing the stability of the furnace condition. At present, lump ore drying systems have the difficult problems of high construction cost, low drying efficiency, high energy consumption and the like.
Disclosure of Invention
In view of the disadvantages of the prior art, it is an object of the present invention to provide a reciprocating swing type belt machine and a method for the pretreatment of iron ore lump ore thereof. The invention is provided with a distribution plate in a reciprocating swing type belt conveyor, and the distribution plate is provided with sieve pores. Firstly, according to the characteristic of strong stickiness of iron ore lump ore powder, the powder in the iron ore lump ore is efficiently screened out by utilizing the self-swinging advantage of a reciprocating swinging belt type machine; secondly, by utilizing the characteristic of abundant hot waste gas resources in the steel process, the hot waste gas is introduced into the reciprocating swing type belt conveyor nearby, and the iron ore lump ore is dried in the reciprocating swing type belt conveyor, so that the moisture of the lump ore is reduced. By adopting the invention, the problem of lump ore charging is solved, the charging proportion and the air permeability level of the blast furnace lump ore are improved, the production cost of the blast furnace is effectively reduced, and the smooth level of the blast furnace is improved.
According to a first embodiment of the present invention, a reciprocating swing-type belt machine is provided.
A reciprocating swing type belt machine comprises a distribution plate, a horizontal driving device and a swing driving device. The horizontal driving device is connected with the distribution plate and drives the distribution plate to move along the length direction of the reciprocating swing type belt machine. The swing driving device is connected with the distribution plate and drives the distribution plate to swing along the width direction of the reciprocating swing type belt machine or drives the distribution plate to swing along the length direction of the reciprocating swing type belt machine. The reciprocating swing type belt machine is provided with a heat medium inlet, a heat medium outlet, a material inlet and a material outlet. The material inlet is arranged at the front end of the distribution plate, the material outlet is arranged at the tail end of the distribution plate, and sieve holes are arranged on the distribution plate.
In the present invention, the reciprocating swing-type belt machine further includes a hood. The distributing plate is arranged in the hood, and the heat medium inlet and the heat medium outlet are arranged on the hood.
Preferably, the heat medium inlet is provided at an upper portion or a top portion of the hood, and the heat medium outlet is provided at a lower portion or a bottom portion of the hood.
Further preferably, the heat medium inlet is provided on the housing and above the material outlet. The heat medium outlet is arranged on the hood and is positioned below the material inlet.
In the present invention, the reciprocating swing type belt machine further comprises a support on which the distribution plate is provided. The swing driving device comprises a driving device, and the driving device is connected with the distribution plate through a support. The driving device is a servo motor.
Preferably, the swing driving device further comprises a transmission control shaft, and the driving device is connected with the support through the transmission control shaft and drives the support and the distribution plate to swing along the width direction of the reciprocating swing type belt machine or drives the support and the distribution plate to swing along the length direction of the reciprocating swing type belt machine.
Preferably, the swing driving device further includes a swing pulling rope, and the driving device is connected to the support frame through the swing pulling rope and drives the support frame and the distribution plate to swing in a width direction of the reciprocating swing type belt machine or drives the support frame and the distribution plate to swing in a length direction of the reciprocating swing type belt machine.
In the present invention, the reciprocating swing type belt conveyor further includes a first moisture detecting device. The first moisture detection device is arranged at the material inlet.
Preferably, the reciprocating swing type belt conveyor further includes a second moisture detecting device. The second moisture detection device is arranged at the material outlet.
In the invention, the bottom of the reciprocating swing type belt machine is provided with a powder outlet.
Preferably, the mesh opening has a pore size of 5 to 20mm, preferably 6 to 15mm, more preferably 7 to 10 mm.
According to a second embodiment provided by the present invention, there is provided a method for the pretreatment of iron ore bulk ores by a reciprocating swing-type belt machine.
A method for the pretreatment of iron ore lump ore using the reciprocating swing type belt machine described in the first embodiment, the method comprising the steps of:
1) conveying iron ore blocks to be treated to the reciprocating swing type belt conveyor, feeding the iron ore blocks to be treated from the material inlet, distributing the iron ore blocks on the distribution plate, and feeding the heat medium into the reciprocating swing type belt conveyor from the heat medium inlet.
2) The horizontal driving device drives the distribution plate to move along the length direction of the reciprocating swing type belt conveyor, and the iron ore blocks move from the material inlet to the material outlet along with the distribution plate. The swing driving device drives the distribution plate to swing back and forth along the width direction of the reciprocating swing type belt conveyor or drives the distribution plate to swing back and forth along the length direction of the reciprocating swing type belt conveyor, and iron ore blocks slide on the distribution plate.
3) Drying and screening the iron ore lump ore to be treated in a reciprocating swinging type belt conveyor. After being treated by the reciprocating swing type belt conveyor, the granular iron ore blocks are discharged from the material outlet. The powdery iron ore lump ore is screened out through the sieve pores on the distribution plate and then discharged from the powder outlet. And the heat medium exchanges heat with the iron ore lump ores and then is discharged from the heat medium outlet.
In the present invention, the method further comprises: 4) the granular iron ore lump ore discharged from the material outlet is conveyed to the blast furnace system.
Preferably, the method further comprises: 5) the powdery iron ore lump ore discharged from the powder outlet is conveyed to the sintering proportioning system.
Preferably, the method further comprises: 6) the heat medium discharged from the heat medium outlet is conveyed to the dust removing system.
In the present invention, in step 1), the moisture content in the processed iron ore bulk is detected by the first moisture detecting means while the iron ore bulk to be processed is conveyed to the reciprocating swing type belt conveyor.
Preferably, in the step 3), while the granulated iron ore lump ore is discharged from the material outlet, the moisture content of the granulated iron ore lump ore discharged from the material outlet is detected by the second moisture detecting means.
In the present invention, the moisture content of the iron ore lump ore to be treated, which enters the reciprocating swing type belt conveyor, is detected by the first moisture detecting means, and is denoted as W0% of the amount of the compound (b). Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemax% of the amount of the compound (b). Calculating the retention time t, h of the iron ore lump ore in the reciprocating swing type belt conveyor;
Figure BDA0002992905230000041
wherein: vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor is DEG C; k is a radical of1The value of the retention time adjusting constant is 0.1-1, preferably 0.2-0.8, and more preferably 0.3-0.6. At a flow velocity V of the heat mediumMediumThe temperature of the heat medium entering the reciprocating oscillating belt conveyor is TMediumMaintaining the retention time of the iron ore lump ore in the reciprocating oscillating belt conveyor at t so that the moisture content of the granular iron ore lump ore discharged from the material outlet of the reciprocating oscillating belt conveyor is lower than Wmax。
In the present invention, the moisture content, denoted as W, in the iron ore lump ore to be processed entering the reciprocating swing type belt machine is detected by the first moisture detecting means0% of the amount of the compound (b). Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemax% of the amount of the compound (b). Calculating the moving speed S, m/min of the distribution plate driven by the horizontal driving device;
Figure BDA0002992905230000042
wherein: l is the length of the distribution plate, m; vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor is DEG C; k is a radical of2The value of the constant is 1-10, preferably 1.25-5, and more preferably 1-10 for adjusting the moving speedPreferably 1.67-3.33. At a flow velocity V of the heat mediumMediumThe temperature of the heat medium entering the reciprocating oscillating belt conveyor is TMediumKeeping the moving speed of the distribution plate driven by the horizontal driving device at S so that the moisture content in the granular iron ore block discharged from the material outlet of the reciprocating swing type belt conveyor is lower than Wmax。
In the present invention, the moisture content, denoted as W,%, in the iron ore bulk ore to be treated, which entered the reciprocating swing type belt machine, was detected by the first moisture detecting means. Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemax% of the amount of the compound (b). Detecting the content of powder mineral aggregate in the iron ore block to be processed entering the reciprocating swinging belt type machine, and recording as M percent. Calculating the swing frequency f, times/min of the distribution plate driven by the swing driving device;
Figure BDA0002992905230000043
wherein: vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor is DEG C; k is a swing frequency adjusting constant, and the value of k is 0.1-0.6, preferably 0.2-0.5, and more preferably 0.25-0.4. The content of the powder mineral aggregate is the weight ratio of the mineral aggregate with the particle size smaller than 8mm to the whole iron ore lump ore. At a flow velocity V of the heat mediumMediumThe temperature of the heat medium entering the reciprocating oscillating belt conveyor is TMediumUnder the condition of (1), the swinging frequency of the distribution plate driven by the swinging driving device is kept to be f, so that the water content in the granular iron ore block ore discharged from the material outlet of the reciprocating swinging type belt machine is lower than WmaxAnd the content of powder in the iron ore lump ore is less than 5 percent.
In the invention, the heat medium is a heat source generated by the steel process. Preferably, the heat medium is a heat source released by burning hot waste gas of a sintering circular cooler, waste gas of a blast furnace hot blast stove, and coke oven gas/blast furnace gas/converter gas. More preferably, the hot exhaust gas from a sintering circular cooler or the hot blast furnace is used.
Preferably, the temperature of the heat medium entering the oscillating belt conveyor is greater than 100 ℃, preferably greater than 150 ℃.
Preferably, the velocity of the air flow of the heat medium entering the reciprocating oscillating belt conveyor is 0.1 to 4m/s, preferably 0.3 to 3m/s, and more preferably 0.5 to 2 m/s.
The invention provides a reciprocating swing type belt conveyor and a method for preprocessing iron ore blocks by using the same. The invention provides a method for drying and simultaneously realizing screening and blanking by adopting a reciprocating swing type belt conveyor, aiming at the problem of high powder and moisture content of natural lump ore. The reciprocating swing type belt conveyor is internally provided with a distribution plate, sieve holes are arranged on the distribution plate, lump ore materials are distributed on the distribution plate after entering the belt conveyor, and the distribution plate reciprocates along the width direction (or the length direction) of the belt conveyor in the traveling process of the belt conveyor, so that the screening of fine grain materials in the lump ore and the heat exchange between gas and solid (namely between a heat medium and the lump ore) are promoted. Among them, the heat source required for drying the lump ore in the belt conveyor is preferably derived from hot exhaust gas from a steel mill (e.g., hot exhaust gas from a blast furnace). Lump ore material sieves and dries the while on the distributing plate, and its screening efficiency is higher after the material is dried, and its stoving effect of material after the screening is better. Lump ore continuously slides from the distribution plate to advance, drying and screening are completed in the advancing process, airflow is continuously introduced from a heat medium inlet at the upper part or the top of the belt conveyor, materials slide in the distribution plate, the air permeability of the whole distribution plate is greatly improved, the heat exchange effect between gas and solid is good, and therefore the powder and moisture content of the lump ore is reduced. And discharging the coarse-grained materials after being screened and dried from a material outlet at the tail end of the distribution plate, enabling the fine-grained materials to fall onto the belt conveyor, collecting the fine-grained materials in the circulating rotation process of the belt conveyor, and then discharging the fine-grained materials from a powder outlet. The material inlet and the material outlet of the reciprocating swing type belt machine are respectively provided with a moisture detection device, and the retention time of iron ore blocks in the belt machine and/or the moving speed of the distribution plate (namely the sliding advancing speed of the iron ore blocks) are/is reasonably adjusted according to moisture detection data so as to ensure that the moisture content in the granular iron ore blocks discharged from the material outlet of the belt machine meets the requirement. In addition, the swinging frequency of the distribution plate can be adjusted by detecting the moisture content of the iron ore block to be treated and the content of the powder mineral aggregate, so that the moisture content and the content of the powder mineral aggregate in the granular iron ore block discharged from the material outlet of the belt conveyor can meet the requirements. The invention can greatly improve the contact efficiency of hot air flow and lump ore, improve the air permeability of the belt conveyor and enhance the screening and drying effects. The popularization of the invention has good economic benefit and environmental benefit, and is expected to open up a more stable and efficient way for the development of the lump ore pretreatment process in China.
Researches show that drying treatment of lump ore in a belt type machine by using heat source gas is feasible, so that moisture of charged lump ore can be effectively reduced, energy consumption required by drying can be greatly reduced, and the charging proportion of the dried lump ore can be improved to a certain extent, thereby reducing the smelting cost of the blast furnace. However, lump ore exists in a stacked state in the belt conveyor, especially, the existence of fine-grained materials causes the air permeability deviation of the whole materials of the belt conveyor, hot air flow cannot smoothly penetrate through a material body, and the contact between the lump ore and a heat medium in the belt conveyor is uneven, so that the drying effect is poor. Meanwhile, in the prior art, the screening and drying pretreatment of the lump ore are basically performed separately by different devices, thereby increasing the cost of the lump ore pretreatment.
Therefore, the invention provides a reciprocating swing type belt conveyor for lump ore pretreatment, aiming at the defects of lump ore drying in the traditional belt conveyor. The reciprocating swing type belt machine comprises a distribution plate, a horizontal driving device and a swing driving device. The distribution plate is arranged in the reciprocating swing type belt conveyor, and the horizontal driving device is connected with the distribution plate and drives the distribution plate to move along the length direction of the reciprocating swing type belt conveyor. The swing driving device is connected with the distribution plate and drives the distribution plate to swing along the width direction of the reciprocating swing type belt machine or drives the distribution plate to swing along the length direction of the reciprocating swing type belt machine. The reciprocating swing type belt machine is a closed box structure and comprises a hood. The hood is provided with a heat medium inlet, a heat medium outlet, a material inlet and a material outlet. The positions of the material inlet and the material outlet on the hood are respectively sealed by flexible connection, so that the belt type machine is ensured to be a relatively closed environment, and the moisture removal efficiency of lump ore is further improved. In the invention, the distribution plate is arranged in the hood, and sieve pores are arranged on the distribution plate. The distribution plate is moved in the longitudinal direction of the reciprocating swing type belt conveyor by a horizontal driving device. The iron ore blocks are distributed on the distribution plate in a scattered manner and continuously slide towards the material outlet along with the movement of the distribution plate. While the material slides on the distribution plate, powdery fine material (material smaller than 8 mm) falls into the lower part or the bottom of the reciprocating swing type belt machine from the sieve holes, thereby realizing the screening of the lump ore material. The materials are in a scattered sliding state on the distribution plate, fine materials are screened out, the air permeability of the whole reciprocating swing type belt conveyor is greatly improved, hot air flow can smoothly penetrate through the material body, so that the materials are more uniformly and fully contacted with a heat medium in the belt conveyor, the heat exchange effect between gas and solid is better, and the moisture in iron ore blocks can be more effectively reduced.
In the invention, the material inlet of the reciprocating swing type belt machine is arranged on the machine cover and positioned at the front end of the distribution plate, and the material outlet is arranged at the tail end of the distribution plate. The heat medium inlet is arranged at the upper part or the top of the hood and is positioned above the material outlet. The heat medium outlet is arranged at the lower part or the bottom of the hood and is positioned below the material inlet. Obviously, the arrangement of the positions of the heat medium inlet and the heat medium outlet changes the direction of the airflow from bottom to top, which enters from the lower part of the drying device, of the heat medium in the conventional arrangement, so that the exhaust system can be arranged at the heat medium outlet. In the invention, the heat medium enters the belt conveyor from a heat medium inlet on the upper part or the top of the hood, the heat medium penetrates through the material body on the distribution plate from top to bottom and directly contacts with the lump ore materials on the distribution plate for heat exchange, and then the air draft system extracts the heat medium from a heat medium outlet on the lower part or the bottom of the hood. When the hot medium of evenly distributed in the belt machine is taken out, hot medium can pass through the sieve mesh on the distributing plate, the air current that hot medium formed passes from the sieve mesh, be favorable to bringing the powder attached to lump ore into the sieve mesh below, the air current trend of hot medium is unanimous with the trend of undersize fine material after the screening promptly, and then the reinforcing distributing plate is to the screening effect of lump ore material, the gas permeability in whole belt machine is greatly improved, promotes screening and stoving effect from this. Preferably, the heat medium inlet is located above the material outlet, and the heat medium outlet is located below the material inlet, that is, the flow direction of the heat medium from the heat medium inlet to the heat medium outlet and the direction of the material from the material inlet to the material outlet are substantially reverse, so that the heat medium entering the belt conveyor from the heat medium inlet can fill the whole box body from top to bottom from one side to the other side, and in the process that the material slides from the material inlet to the material outlet, the heat medium can be in effective and sufficient contact with the material on the distribution plate as far as possible, thereby further improving the screening and drying effects.
In the present invention, the reciprocating swing-type belt machine further includes a support and a swing drive device. The distribution plate is arranged on the bracket. The swing driving device comprises a driving device, and the driving device is connected with the distribution plate through a support. Wherein, the driving device is a servo motor. Preferably, the swing driving device further comprises a transmission control shaft, the driving device is connected with the transmission control shaft and is connected with the support through the transmission control shaft, and the driving device drives the support and the distribution plate to swing along the width direction of the reciprocating swing type belt machine or drives the support and the distribution plate to swing along the length direction of the reciprocating swing type belt machine. Further preferably, the swing drive further comprises a swing traction rope. The driving device is connected with the swinging traction rope and is connected with the bracket through the swinging traction rope, and the driving device drives the bracket and the distribution plate to swing along the width direction of the reciprocating swinging type belt machine or drives the bracket and the distribution plate to swing along the length direction of the reciprocating swinging type belt machine. Under the drive of the horizontal driving device, the lump ore materials slide on the distribution plate along the length direction of the belt conveyor to advance, and in the process, the belt conveyor promotes the screening of fine grain materials in the lump ore and the heat exchange between gas and solid in a reciprocating swing mode of the distribution plate so as to improve the screening and drying effects of the lump ore materials and further solve the problem of high powder and moisture content in the lump ore materials.
Preferably, the reciprocating swing type belt machine of the present invention further comprises a first moisture detecting device provided at the material inlet, and a second moisture detecting device provided at the material outlet. The first moisture detection device is used for detecting the moisture content in the iron ore lump ores to be processed entering the belt conveyor, and the second moisture detection device is used for detecting the moisture content of the granular iron ore lump ores discharged from the material outlet. If the moisture content of the iron ore block ores to be processed detected by the first moisture detection device is higher or lower, the retention time of the iron ore block ores in the belt conveyor can be reasonably adjusted according to moisture detection data, or the moving speed of the horizontal driving device driving distribution plate can be reasonably adjusted according to the moisture detection data, and the swinging frequency of the swinging driving device driving distribution plate can be adjusted, so that the moisture content and the powder ore material content of the granular iron ore block ores discharged from the material outlet meet the requirements.
Accordingly, the present invention can also perform feedback adjustment according to the moisture content of the granulated iron ore lump ore discharged from the material outlet detected by the second moisture detecting means. If the moisture content of the granular iron ore blocks detected by the second moisture detection device is higher, the moving speed of the distribution plate driven by the horizontal driving device can be reduced to prolong the retention time of the iron ore blocks in the belt conveyor, or the swinging frequency of the distribution plate is increased by controlling the swinging driving device, so that the contact time and the contact area between the iron ore blocks and the heat medium are increased, the evaporation of the moisture in the iron ore blocks is accelerated, and the screening effect is improved. On the contrary, when the moisture content of the granular iron ore lump ore discharged from the material outlet detected by the second moisture detection device is too low, the moving speed of the horizontal driving device for driving the distribution plate can be properly increased to shorten the retention time of the iron ore lump ore in the belt conveyor, or the swing driving device is controlled to reduce the swing frequency of the distribution plate or stop starting the swing driving device, so that the moisture content of the discharged granular iron ore lump ore is ensured to meet the requirement, the energy consumption required by drying is reduced, the resources are saved, and the cost is reduced.
The invention also provides a method for pretreating iron ore blocks by using the reciprocating swinging type belt machine. The invention provides a pretreatment method for drying and screening by adopting a reciprocating swing type belt conveyor, aiming at the difficult problem of large powder and water in natural lump ore. The method comprises the steps of conveying iron ore blocks to be treated to a reciprocating swing type belt conveyor, feeding the iron ore blocks to be treated from a material inlet, distributing on a distribution plate, and feeding a heat medium into the reciprocating swing type belt conveyor from a heat medium inlet. The horizontal driving device drives the distribution plate to move along the length direction of the reciprocating swing type belt conveyor, and the iron ore blocks move from the material inlet to the material outlet along with the distribution plate. The swing driving device drives the distribution plate to swing back and forth along the width direction of the reciprocating swing type belt conveyor or drives the distribution plate to swing back and forth along the length direction of the reciprocating swing type belt conveyor, and iron ore blocks slide on the distribution plate. Drying and screening the iron ore lump ore to be treated in a reciprocating swinging type belt conveyor. The invention solves the problem of raw material charging, improves the charging proportion and the air permeability level of the raw material of the blast furnace, effectively reduces the production cost of the blast furnace and improves the smooth level of the blast furnace.
In the present invention, the lump ore is subjected to a drying pretreatment in a reciprocating oscillating belt conveyor to remove moisture from the lump ore, and the heat source required for drying is preferably from hot exhaust gas from a steel mill (e.g., hot exhaust gas from a blast furnace). Meanwhile, lump ore generally exists in a stacked state in a traditional belt conveyor, and particularly exists in fine-grained materials, so that the whole material air permeability of the belt conveyor is deviated, hot air flow cannot smoothly penetrate through a material body, and the drying effect is poor. Aiming at the defects of the traditional belt machine, the invention provides a reciprocating swing type belt machine, wherein a distribution plate is arranged in the reciprocating swing type belt machine, sieve holes are arranged on the distribution plate, and a distribution plate swings back and forth in the advancing process of the reciprocating swing type belt machine to promote the sieving of material powder (materials smaller than 8 mm) and the heat exchange between gas and solid. Compared with the traditional cylinder drying process, the pretreatment technology of drying by adopting the reciprocating swing type belt machine is adopted, and the belt machine is relatively a closed environment, so that the moisture removal efficiency of the lump ore is high, the difficult problem of lump ore entering a furnace (blast furnace) is solved, the furnace entering proportion and the air permeability level of the blast furnace lump ore are improved, the production cost of the blast furnace is effectively reduced, and the smooth level of the blast furnace is improved. The method has good economic benefit, social benefit and environmental benefit, and is expected to open up a more stable and efficient way for the development of the lump ore pretreatment process in China.
Preferably, after the natural lump ore is dried and screened in the reciprocating swing type belt conveyor, the granular iron ore lump ore is discharged from the material outlet and conveyed to a blast furnace system for smelting process. The powdery iron ore blocks fall onto the belt conveyor through the sieve holes on the distribution plate and are discharged from the powder outlet and conveyed to the sintering and batching system. Preferably, the heat medium is discharged from the heat medium outlet and conveyed to the dust removal system.
In the invention, the moisture content W in the iron ore lump ore to be treated entering the reciprocating swing type belt machine is detected in real time by arranging the first moisture detection device at the material inlet of the reciprocating swing type belt machine0% of the amount of the compound (b). Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemax% of the amount of the compound (b). Calculating the retention time t, h of the iron ore lump ore in the reciprocating swing type belt conveyor;
Figure BDA0002992905230000091
wherein: w0Detecting the moisture content percent in the iron ore lump ore to be treated entering the reciprocating swing type belt machine by a first moisture detection device; wmaxThe upper limit of the water content of the lump ore entering the blast furnace may be adjusted and set as required, for example, WmaxLess than or equal to 4 percent; t is the retention time of iron ore lump ore in the reciprocating swing type belt conveyor, h; vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor is DEG C; k is a radical of1The value of the retention time adjusting constant is 0.1-1, preferably 0.2-0.8, and more preferably 0.3-0.6.
In the above formula, the retention time of the iron ore lump ore in the belt conveyor is proportional to the moisture content in the iron ore lump ore to be treated, and inversely proportional to the temperature of the heat medium when it enters the belt conveyor and the flow rate of the heat mediumThat is, the higher the moisture content in the iron ore lump ore to be processed, the lower the temperature of the heat medium when entering the belt conveyor, and the lower the flow rate of the heat medium, the longer the time for the iron ore lump ore to stay in the belt conveyor is required to ensure the drying effect of the iron ore lump ore in the belt conveyor. On the contrary, the retention time of the iron ore lump ore in the belt conveyor can be shortened. Wherein the flow velocity of the heat medium is VMediumThe temperature of the heat medium entering the reciprocating oscillating belt conveyor is TMediumMaintaining the retention time of the iron ore lump ore in the reciprocating oscillating belt conveyor at t so that the moisture content of the granular iron ore lump ore discharged from the material outlet of the reciprocating oscillating belt conveyor is lower than Wmax。
In the invention, the moisture content W in the iron ore lump ore to be treated entering the reciprocating swing type belt machine is detected in real time by arranging the first moisture detection device at the material inlet of the reciprocating swing type belt machine0% of the amount of the compound (b). Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemax% of the amount of the compound (b). Calculating the moving speed S, m/min of the distribution plate driven by the horizontal driving device;
Figure BDA0002992905230000092
wherein: s is the moving speed of the horizontal driving device driving the distribution plate, m/min; l is the length of the distribution plate, m; vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor is DEG C; k is a radical of2The value of the moving speed adjusting constant is 1-10, preferably 1.25-5, and more preferably 1.67-3.33.
In the above formula, the moving speed of the distribution plate driven by the horizontal driving device is in direct proportion to the length of the distribution plate, the temperature of the heat medium when the heat medium enters the belt conveyor and the flow rate of the heat medium, and is in inverse proportion to the moisture content in the iron ore lump ore to be treated, namely, the longer the length of the distribution plate, the higher the temperature of the heat medium when the heat medium enters the belt conveyor, the faster the flow rate of the heat medium and the lower the moisture content in the iron ore lump ore to be treated, the faster the moving speed of the distribution plate driven by the horizontal driving device is, so as to ensure the drying effect of the iron ore lump ore in the belt conveyor. Otherwise, the moving speed of the distribution plate driven by the horizontal driving device can be reduced. Wherein the flow velocity of the heat medium is VMediumThe temperature of the heat medium entering the reciprocating oscillating belt conveyor is TMediumKeeping the moving speed of the distribution plate driven by the horizontal driving device at S so that the moisture content in the granular iron ore block discharged from the material outlet of the reciprocating swing type belt conveyor is lower than Wmax。
In the invention, the moisture content W in the iron ore lump ore to be treated entering the reciprocating swing type belt machine is detected in real time by arranging the first moisture detection device at the material inlet of the reciprocating swing type belt machine0% of the amount of the compound (b). Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemax% of the amount of the compound (b). Detecting the content M,%, of powder mineral aggregate in the iron ore block to be processed entering the reciprocating swing type belt conveyor. Calculating the swing frequency f, times/min of the distribution plate driven by the swing driving device;
Figure BDA0002992905230000101
wherein: f is the swing frequency of the distribution plate driven by the swing driving device, and times/min; vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor is DEG C; k is a radical of3The value of the oscillation frequency adjusting constant is 0.1-0.6, preferably 0.2-0.5, and more preferably 0.25-0.4; m is the content of powder mineral aggregate in the iron ore block to be treated entering the reciprocating swing type belt conveyor, and the percentage is shown in the specification. The powder mineral aggregate is the weight ratio of the mineral aggregate with the particle size smaller than 8mm to the whole iron ore lump ore.
In the above formula, the swing frequency of the swing driving device driving the distribution plate is in direct proportion to the moisture content and the content of the powder mineral aggregate in the iron ore lump ore to be treated and in inverse proportion to the temperature when the heat medium enters the belt conveyor and the flow rate of the heat medium, i.e. the higher the moisture content in the iron ore lump ore to be treated, the higher the content of the powder mineral aggregate in the iron ore lump ore to be treated, the lower the temperature when the heat medium enters the belt conveyor and the slower the flow rate of the heat medium, the faster the swing frequency of the swing driving device driving the distribution plate, and further the lower the swing frequency of the swing driving device driving the distribution plate, the higher the swing frequency of the swing driving device driving the distribution plate, the lower the swing frequency of the swing driving device driving the distribution plate, the temperature of the swing driving device driving the distribution plate, and the lower the flow rate of the heat mediumEnsuring the drying and screening effect of the iron ore lump ores in the belt conveyor. Otherwise, the swing frequency of the distribution plate driven by the swing driving device can be reduced. Wherein the flow velocity of the heat medium is VMediumThe temperature of the heat medium entering the reciprocating oscillating belt conveyor is TMediumUnder the condition of (1), the swinging frequency of the distribution plate driven by the swinging driving device is kept to be f, so that the water content in the granular iron ore block ore discharged from the material outlet of the reciprocating swinging type belt machine is lower than WmaxAnd the content of powder in the iron ore lump ore is less than 5 percent. It should be noted that, in the present invention, the method of detecting the content of the powdery ore material in the iron ore block to be processed entering the reciprocating swing type belt conveyor is not limited, and the detection can be achieved. For example, the relevant data and the like may be acquired by sampling inspection or the like before the iron ore lump ore enters the belt conveyor.
In the present invention, the heat medium may be hot exhaust gas having a high temperature or hot air subjected to heat treatment. Generally, the temperature of the heat medium is higher than 100 ℃. Preferably greater than 150 deg.c.
In the present application, the length of the reciprocating oscillating belt conveyor is generally 2 to 300m, preferably 3 to 200m, more preferably 5 to 100m, still more preferably 8 to 80m, and still more preferably 10 to 60 m.
In the present application, the width of the reciprocating oscillating belt conveyor is generally 0.2 to 100m, preferably 1 to 80m, more preferably 2 to 60m, and still more preferably 5 to 40 m.
In the present application, the "granulated iron ore lump" is expressed in the same meaning as the "coarse material". The "powdery iron ore lump ore" has the same meaning expression as the "fine material".
Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
1. the moisture removal effect is good. The invention adopts the reciprocating swing type belt conveyor, the distribution plate is arranged in the reciprocating swing type belt conveyor, the materials slide on the distribution plate in a dispersed state, the air permeability of the whole reciprocating swing type belt conveyor is greatly improved, the heat medium is more fully contacted with the iron ore lump ore, the heat exchange effect between gas and solid is better, and the moisture in the iron ore lump ore can be more effectively reduced.
2. The powder removal rate is high. The distribution plate is provided with sieve pores and a swing driving device. According to the characteristic that the powder of the lump ore materials is high in viscosity, the powder in the iron ore lump ore can be efficiently screened out by utilizing the distribution plate with the sieve holes and the swing driving device.
3. In the invention, the heat medium enters from the heat medium inlet on the upper part or the top of the belt conveyor, the air flow formed by the heat medium fills the belt conveyor from top to bottom and from one side to the other side in the belt conveyor, and the air flow and the material slide on the distribution plate in the opposite directions, so that the contact between the heat medium and the material is more sufficient and uniform, and the drying effect of the material is improved. Meanwhile, the heat medium can pass through the sieve holes in the distribution plate in the process of being pumped out from the heat medium outlet from top to bottom, namely, the heat medium can bring fine-grained materials attached to the lump ore into the sieve holes, and the sieving effect of the materials is further enhanced.
4. The belt type machine is adopted to dry the iron ore lump ore, and meanwhile, the characteristic that the distribution plate with the sieve holes is arranged in the belt type machine is utilized to screen the iron ore lump ore, and screening and drying are integrated, so that the screening and drying efficiency is improved, mutual promotion is realized, the screening efficiency of the dried material is higher, and the drying effect of the screened material is better.
5. The method adopted by the invention is simple, practical and reliable, fully utilizes the characteristic of sufficient hot waste gas resources of a steel mill, effectively reduces the pretreatment cost of the iron ore lump ore, solves the problem of difficult charging of the iron ore lump ore, improves the charging proportion and the air permeability level of the blast furnace iron ore lump ore, effectively reduces the production cost of the blast furnace, and improves the smooth level of the blast furnace.
Drawings
FIG. 1 is a schematic view of a reciprocating swing belt machine of the present invention;
FIG. 2 is a schematic structural view of a reciprocating swing type belt conveyor of the present invention, in which a first moisture detecting device and a second moisture detecting device are installed;
FIG. 3 is a schematic structural diagram of a reciprocating swing type belt machine connecting sintering batching system, a blast furnace system and a dust removing system;
FIG. 4 is a schematic diagram showing the distribution of the sieve holes on the distribution plate in the reciprocating swing type belt conveyor of the present invention;
FIG. 5 is a process flow diagram of a reciprocating oscillating belt machine for the pre-treatment of iron ore lump ore in accordance with the present invention;
FIG. 6 is a second process flow diagram of the reciprocating oscillating belt machine of the present invention for the pre-treatment of iron ore lump ore;
fig. 7 is a third process flow diagram of a reciprocating oscillating belt machine for iron ore lump ore pretreatment according to the present invention.
Reference numerals:
1: a reciprocating swing type belt machine; 101: a distribution plate; 10101: screening holes; 102: a horizontal driving device; 103: a swing drive device; 10301: a transmission control shaft; 10302: swinging the traction rope; 10303: a drive device; 104: a heat medium inlet; 105: a thermal medium outlet; 106: a material inlet; 107: a material outlet; 108: a hood; 109: a support; 110: a powder outlet; 201: a first moisture detection device; 202: a second moisture detection device; 3: a blast furnace system; 4: a sintering batching system; 5: a dust removal system.
Detailed Description
The technical solution of the present invention is illustrated below, and the claimed scope of the present invention includes, but is not limited to, the following examples.
According to a first embodiment of the present invention, a reciprocating swing-type belt machine is provided.
A reciprocating swing type belt machine 1 includes a distribution plate 101, a horizontal driving device 102, and a swing driving device 103. The horizontal driving device 102 is connected to the distribution plate 101, and drives the distribution plate 101 to move in the longitudinal direction of the reciprocating swing type belt conveyor 1. The swing drive device 103 is connected to the distribution plate 101, and drives the distribution plate 101 to swing in the width direction of the reciprocating swing type belt conveyor 1 or drives the distribution plate 101 to swing in the length direction of the reciprocating swing type belt conveyor 1. The reciprocating oscillating belt conveyor 1 is provided with a heat medium inlet 104, a heat medium outlet 105, a material inlet 106, and a material outlet 107. The material inlet 106 is arranged at the front end of the distribution plate 101, the material outlet 107 is arranged at the tail end of the distribution plate 101, and the distribution plate 101 is provided with sieve holes 10101.
In the present invention, the reciprocating swing-type belt conveyor 1 further includes a hood 108. The distribution plate 101 is provided in the hood 108, and the heat medium inlet 104 and the heat medium outlet 105 are provided in the hood 108.
Preferably, the heat medium inlet 104 is provided at the upper portion or the top of the hood 108, and the heat medium outlet 105 is provided at the lower portion or the bottom of the hood 107.
It is further preferred that the heat medium inlet 104 is arranged on the hood 108 and above the material outlet 107. The heat medium outlet 105 is provided on the hood 107 and below the material inlet 106.
In the present invention, the reciprocating swing type belt conveyor 1 further includes a support 109, and the distribution plate 101 is provided on the support 109. The swing driving device 103 includes a driving device 10303, and the driving device 10303 is connected to the distribution plate 101 through the bracket 109. The driving device 10303 is a servo motor.
Preferably, the swing driving device 103 further includes a transmission control shaft 10301, and the driving device 10303 is connected to the support frame 109 through the transmission control shaft 10301 and drives the support frame 109 and the distribution plate 101 to swing in the width direction of the reciprocating swing type belt machine 1 or drives the support frame 109 and the distribution plate 101 to swing in the length direction of the reciprocating swing type belt machine 1.
Preferably, the swing driving device 103 further includes a swing pulling rope 10302, and the driving device 10303 is connected to the support frame 109 by the swing pulling rope 10302 and drives the support frame 109 and the distribution plate 101 to swing in the width direction of the reciprocating swing type belt conveyor 1 or drives the support frame 109 and the distribution plate 101 to swing in the length direction of the reciprocating swing type belt conveyor 1.
In the present invention, the reciprocating swing type belt conveyor 1 further includes a first moisture detecting device 201. A first moisture detecting means 201 is arranged at the material inlet 106.
Preferably, the reciprocating swing type belt conveyor 1 further includes a second moisture detection device 202. A second moisture detecting means 202 is arranged at the material outlet 107.
In the present invention, the bottom of the reciprocating swing type belt conveyor 1 is provided with a powder outlet 110.
Preferably, the aperture of the sieve opening 10101 is 5-20mm, preferably 6-15mm, and more preferably 7-10 mm.
Example 1
As shown in fig. 1 and 4, a reciprocating swing type belt machine 1 includes a distribution plate 101, a horizontal driving device 102, and a swing driving device 103. The horizontal driving device 102 is connected to the distribution plate 101, and drives the distribution plate 101 to move in the longitudinal direction of the reciprocating swing type belt conveyor 1. The swing drive device 103 is connected to the distribution plate 101, and drives the distribution plate 101 to swing in the width direction of the reciprocating swing type belt conveyor 1. The reciprocating oscillating belt conveyor 1 is provided with a heat medium inlet 104, a heat medium outlet 105, a material inlet 106, and a material outlet 107. The material inlet 106 is arranged at the front end of the distribution plate 101 and the material outlet 107 is arranged at the rear end of the distribution plate 101. The distribution plate 101 is provided with sieve holes 10101.
Example 2
A reciprocating swing type belt machine 1 includes a distribution plate 101, a horizontal driving device 102, and a swing driving device 103. The horizontal driving device 102 is connected to the distribution plate 101, and drives the distribution plate 101 to move in the longitudinal direction of the reciprocating swing type belt conveyor 1. The swing drive device 103 is connected to the distribution plate 101, and drives the distribution plate 101 to swing in the longitudinal direction of the reciprocating swing type belt conveyor 1. The reciprocating oscillating belt conveyor 1 is provided with a heat medium inlet 104, a heat medium outlet 105, a material inlet 106, and a material outlet 107. The material inlet 106 is arranged at the front end of the distribution plate 101 and the material outlet 107 is arranged at the rear end of the distribution plate 101. The distribution plate 101 is provided with sieve holes 10101.
Example 3
Example 1 was repeated except that the reciprocating swing type belt conveyor 1 further included a hood 108, the distribution plate 101 was disposed in the hood 108, and the heat medium inlet 104 and the heat medium outlet 105 were both disposed on the hood 108. In which the heat medium inlet 104 is provided at the top of the hood 108 and the heat medium outlet 105 is provided at the bottom of the hood 108.
Example 4
Example 3 was repeated except that the heat medium inlet 104 was provided on the hood 108 and above the material outlet 107. The heat medium outlet 105 is provided on the hood 108 and below the material inlet 106.
Example 5
Example 4 was repeated except that the reciprocating swing type belt machine 1 further included a support 109, and the distribution plate 101 was disposed on the support 109. The swing driving device 103 includes a driving device 10303, and the driving device 10303 is connected to the distribution plate 101 through the bracket 109. The driving device 10303 is a servo motor.
Example 6
Embodiment 5 is repeated except that the swing driving means 103 further includes a transmission control shaft 10301, and the driving means 10303 is connected to the support 109 through the transmission control shaft 10301 and drives the support 109 and the distribution plate 101 to swing in the width direction of the reciprocating swing type belt conveyor 1.
Example 7
Embodiment 5 is repeated except that the swing driving means 103 further includes a swing pulling rope 10302, and the driving means 10303 is connected to the support frame 109 by the swing pulling rope 10302 and drives the support frame 109 and the distribution plate 101 to swing in the width direction of the reciprocating swing type belt machine 1.
Example 8
Example 6 is repeated except that the swing driving means 103 further includes a swing pulling rope 10302, and the driving means 10303 is connected to the support frame 109 through the transmission control shaft 10301 and the swing pulling rope 10302 and drives the support frame 109 and the distribution plate 101 to swing in the width direction of the reciprocating swing type belt conveyor 1.
Example 9
As shown in FIG. 2, example 8 is repeated except that the reciprocating swing type belt conveyor 1 further includes a first moisture detecting device 201. A first moisture detecting means 201 is arranged at the material inlet 106.
Example 10
Example 9 was repeated except that the reciprocating oscillating type belt conveyor 1 further included a second moisture detecting device 202. A second moisture detecting means 202 is arranged at the material outlet 107.
Example 11
Example 10 was repeated except that the bottom of the reciprocating oscillating belt conveyor 1 was provided with a powder outlet 110.
Example 12
Example 11 was repeated except that the opening size of the sieve hole 10101 was 5 mm.
Example 13
Example 11 was repeated except that the opening size of the sieve hole 10101 was 10 mm.
Example 14
A method for pre-treatment of iron ore lump ore for a reciprocating swing type belt machine, the method comprising the steps of:
1) the iron ore lump ore to be processed is conveyed to the reciprocating swing type belt conveyor 1, and enters from the material inlet 106 and is distributed on the distribution plate 101. The heat medium enters the reciprocating swing type belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore follows the distribution plate 101 to move from the material inlet 106 to the material outlet 107. The swing drive device 103 drives the distribution plate 101 to swing back and forth in the width direction of the reciprocating belt conveyor 1, and the iron ore lump ore slides on the distribution plate 101.
3) The iron ore lump ore to be treated is dried and sieved in the reciprocating swing type belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by being processed by the reciprocating swing type belt conveyor 1. The powdered iron ore lump ore is screened out through the sieve holes 10101 of the distribution plate 101 and then discharged from the fine material outlet 110. The heat medium is discharged from the heat medium outlet 105 after exchanging heat with the iron ore lump ore.
Example 15
A method for pre-treatment of iron ore lump ore for a reciprocating swing type belt machine, the method comprising the steps of:
1) the iron ore lump ore to be processed is conveyed to the reciprocating swing type belt conveyor 1, and enters from the material inlet 106 and is distributed on the distribution plate 101. The heat medium enters the reciprocating swing type belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore follows the distribution plate 101 to move from the material inlet 106 to the material outlet 107. The swing drive device 103 drives the distribution plate 101 to swing back and forth in the width direction of the reciprocating belt conveyor 1, and the iron ore lump ore slides on the distribution plate 101.
3) The iron ore lump ore to be treated is dried and sieved in the reciprocating swing type belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by being processed by the reciprocating swing type belt conveyor 1. The powdered iron ore lump ore is screened out through the sieve holes 10101 of the distribution plate 101 and then discharged from the fine material outlet 110. The heat medium is discharged from the heat medium outlet 105 after exchanging heat with the iron ore lump ore.
4) The granular iron ore lump ore discharged from the material outlet 107 is conveyed to the blast furnace system 3.
5) The powdery iron ore lump ore discharged from the fine material outlet 110 is conveyed to the sintering proportioning system 4.
6) The heat medium discharged from the heat medium outlet 105 is conveyed to the dust removing system 5.
Example 16
Example 15 was repeated except that in step 1), the moisture content in the processed iron ore lump was detected by the first moisture detecting device 201 while the iron ore lump to be processed was conveyed to the reciprocating swing type belt conveyor 1.
Example 17
Example 15 is repeated except that in step 3), while the granulated iron ore lump ore is discharged from the material outlet 107, the moisture content of the granulated iron ore lump ore discharged from the material outlet 107 is detected by the second moisture detecting means 202.
Example 18
As shown in fig. 5, a method for pre-treating iron ore lumped ore by a reciprocating swing type belt machine, the method comprising the steps of:
1) the iron ore lump ore to be processed is conveyed to the reciprocating swing type belt conveyor 1, and enters from the material inlet 106 and is distributed on the distribution plate 101. The heat medium enters the reciprocating swing type belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore follows the distribution plate 101 to move from the material inlet 106 to the material outlet 107. The swing drive device 103 drives the distribution plate 101 to swing back and forth in the width direction of the reciprocating belt conveyor 1, and the iron ore lump ore slides on the distribution plate 101.
3) The iron ore lump ore to be treated is dried and sieved in the reciprocating swing type belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by being processed by the reciprocating swing type belt conveyor 1. The powdered iron ore lump ore is screened out through the sieve holes 10101 of the distribution plate 101 and then discharged from the fine material outlet 110. The heat medium is discharged from the heat medium outlet 105 after exchanging heat with the iron ore lump ore.
The moisture content, denoted as W, in the iron ore lump ore to be treated entering the reciprocating swing type belt machine 1 is detected by a first moisture detecting device 201 provided at the material inlet 1060% of the amount of the compound (b). Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemaxLess than or equal to 4 percent. Calculating the retention time t, h of the iron ore lump ore in the reciprocating swing type belt conveyor 1;
Figure BDA0002992905230000161
wherein: vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor 1 is DEG C; k is a radical of1The value of the retention time adjusting constant is 0.1-1, preferably 0.2-0.8, and more preferably 0.3-0.6. At a flow velocity V of the heat mediumMediumThe temperature of the heat medium when it enters the reciprocating swing type belt conveyor 1 is TMediumMaintaining a retention time t of the iron ore lump ore in the reciprocating swing type belt machine 1 so that a moisture content of the granular iron ore lump ore discharged from the material outlet 107 of the reciprocating swing type belt machine 1 is lower than Wmax。
Example 19
As shown in fig. 6, a method for pre-treating iron ore lumped ore by a reciprocating swing type belt machine, the method comprising the steps of:
1) the iron ore lump ore to be processed is conveyed to the reciprocating swing type belt conveyor 1, and enters from the material inlet 106 and is distributed on the distribution plate 101. The heat medium enters the reciprocating swing type belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore follows the distribution plate 101 to move from the material inlet 106 to the material outlet 107. The swing drive device 103 drives the distribution plate 101 to swing back and forth in the width direction of the reciprocating belt conveyor 1, and the iron ore lump ore slides on the distribution plate 101.
3) The iron ore lump ore to be treated is dried and sieved in the reciprocating swing type belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by being processed by the reciprocating swing type belt conveyor 1. The powdered iron ore lump ore is screened out through the sieve holes 10101 of the distribution plate 101 and then discharged from the fine material outlet 110. The heat medium is discharged from the heat medium outlet 105 after exchanging heat with the iron ore lump ore.
The moisture content, denoted as W, in the iron ore lump ore to be treated entering the reciprocating swing type belt machine 1 is detected by a first moisture detecting device 201 provided at the material inlet 1060% of the amount of the compound (b). Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemaxLess than or equal to 4 percent. Calculating the moving speed S, m/min of the distribution plate 101 driven by the horizontal driving device 102;
Figure BDA0002992905230000171
wherein: l is the length of the distribution plate 101, m; vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor 1 is DEG C; k is a radical of2The value of the moving speed adjusting constant is 1-10, preferably 1.25-5, and more preferably 1.67-3.33. At a flow velocity V of the heat mediumMediumThe temperature of the heat medium when it enters the reciprocating swing type belt conveyor 1 is TMediumMaintaining the moving speed of the distribution plate 101 driven by the horizontal driving device 102S, so that the moisture content of the granulated iron ore lump discharged from the material outlet 107 of the reciprocating swing type belt conveyor 1 is lower than Wmax。
Example 20
As shown in fig. 7, a method for pre-treating iron ore lumped ore by a reciprocating swing type belt machine, the method comprising the steps of:
1) the iron ore lump ore to be processed is conveyed to the reciprocating swing type belt conveyor 1, and enters from the material inlet 106 and is distributed on the distribution plate 101. The heat medium enters the reciprocating swing type belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore follows the distribution plate 101 to move from the material inlet 106 to the material outlet 107. The swing drive device 103 drives the distribution plate 101 to swing back and forth in the width direction of the reciprocating belt conveyor 1, and the iron ore lump ore slides on the distribution plate 101.
3) The iron ore lump ore to be treated is dried and sieved in the reciprocating swing type belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by being processed by the reciprocating swing type belt conveyor 1. The powdered iron ore lump ore is screened out through the sieve holes 10101 of the distribution plate 101 and then discharged from the fine material outlet 110. The heat medium is discharged from the heat medium outlet 105 after exchanging heat with the iron ore lump ore.
The moisture content, denoted as W, in the iron ore lump ore to be treated entering the reciprocating swing type belt machine 1 is detected by a first moisture detecting device 201 provided at the material inlet 1060% of the amount of the compound (b). Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemaxLess than or equal to 4 percent. The content of the powder mineral aggregate in the iron ore block ore entering the reciprocating swing type belt conveyor 1 was detected and recorded as M,%. Calculating the swing frequency f, times/min of the distribution plate 101 driven by the swing driving device 103;
Figure BDA0002992905230000172
wherein: vMediumThe flow rate of the heat medium, m/s; t isMediumFor the heat medium to enter and reciprocateTemperature at the time of the swing type belt conveyor 1, ° c; k is a radical of3The value of the oscillation frequency adjusting constant is 0.1-0.6, preferably 0.2-0.5, and more preferably 0.25-0.4; the powder mineral aggregate is the weight ratio of the mineral aggregate with the particle size smaller than 8mm to the whole iron ore lump ore. At a flow velocity V of the heat mediumMediumThe temperature of the heat medium when it enters the reciprocating swing type belt conveyor 1 is TMediumUnder the condition (1), the oscillating frequency f of the distribution plate 101 driven by the oscillating drive device 103 is maintained so that the moisture content of the granulated iron ore lump discharged from the material outlet 107 of the reciprocating oscillating belt conveyor 1 is lower than WmaxAnd the content of powder in the iron ore lump ore is less than 5 percent.
Example 21
Example 18 was repeated except that the heat medium was the hot exhaust gas of the sinter ring cooler.
Example 22
Example 19 was repeated except that the heat medium was blast furnace hot blast stove exhaust gas.
Example 23
Example 20 was repeated except that the heat medium was the heat source released by the combustion of coke oven gas/blast furnace gas/converter gas.
Example 24
Example 23 was repeated except that the temperature of the heat medium entering the reciprocating oscillating belt conveyor 1 was more than 150 ℃.
Application example 1
When the method according to example 17 was used in a steel smelting plant located in Zhanjiang, the moisture content of the iron ore lump ore to be treated, which entered the reciprocating swing type belt conveyor 1, was measured by the first moisture detecting device 201 to be 20%. According to the requirement of the blast furnace condition, the upper limit of the water content of the lump ore entering the blast furnace is set to be 4 percent. The residence time t of the iron ore lump ore in the reciprocating swing type belt conveyor 1 is calculated:
Figure BDA0002992905230000181
wherein: vMediumThe flow rate of the heat medium was 2 m/s. T isMediumThe temperature of the heat medium at the time of entering the reciprocating belt conveyor 1 was 500℃。k1The residence time adjustment constant was 0.4. At a flow velocity V of the heat mediumMediumThe temperature of the heat medium when it enters the reciprocating swing type belt conveyor 1 is TMediumMaintaining a retention time of the iron ore lump ore in the reciprocating oscillating belt conveyor 1 of 1.2 hours so that a moisture content of the granular iron ore lump ore discharged from the material outlet 107 of the reciprocating oscillating belt conveyor 1 is less than 4%.
Application example 2
When the method according to example 19 was used in a steel smelting plant located in Zhanjiang, the moisture content of the iron ore lump ore to be treated, which entered the reciprocating swing type belt conveyor 1, was detected by the first moisture detecting device 201 to be 12%. According to the requirement of the blast furnace condition, the upper limit of the water content of the lump ore entering the blast furnace is set to be 4 percent. Calculating the moving speed S of the horizontal driving device 102 driving the distribution plate 101:
Figure BDA0002992905230000182
wherein: l is the length of the distribution plate 101 and is 40 m. VMediumThe flow rate of the heat medium was 3 m/s. T isMediumThe temperature of the heat medium at the time of entering the reciprocating oscillating belt conveyor 1 was 400 ℃. k is a radical of2The value of the constant is 2 for the moving speed adjustment. At a flow velocity V of the heat mediumMediumThe temperature of the heat medium when it enters the reciprocating swing type belt conveyor 1 is TMediumThe moving speed of the distribution plate 101 by the horizontal driving device 102 was kept at 1.3m/min so that the moisture content in the granular iron ore nuggets discharged from the material outlet 107 of the reciprocating swing type belt conveyor 1 was less than 4%.
Application example 3
When the method according to example 20 was used in a steel smelting plant located in Zhanjiang, the moisture content of the iron ore lump ore to be treated, which entered the reciprocating swing type belt conveyor 1, was detected by the first moisture detecting device 201 to be 10%. According to the requirement of the blast furnace condition, the upper limit of the water content of the lump ore entering the blast furnace is set to be 3 percent. The content of the powder mineral aggregate in the iron ore block to be processed entering the reciprocating swing type belt conveyor was detected to be 20%. Calculating the swing frequency f of the distribution plate 101 driven by the swing driving device 103:
Figure BDA0002992905230000191
wherein: vMediumThe flow rate of the heat medium was 1.5 m/s. T isMediumThe temperature of the heat medium when it entered the reciprocating oscillating belt conveyor was 300 ℃. k is a radical of3The value of the oscillation frequency adjusting constant is 0.3. M is the content of powder mineral aggregate in the iron ore block to be treated entering the reciprocating swinging belt type machine, wherein the content of the powder mineral aggregate is the weight ratio of mineral aggregate with the grain diameter of less than 8mm to the whole iron ore block. At a flow velocity V of the heat mediumMediumThe temperature of the heat medium when it enters the reciprocating swing type belt conveyor 1 is TMediumUnder the condition (1), the swinging frequency of the distribution plate 101 driven by the swinging driving device 103 is kept at 12 times/min, so that the moisture content in the granular iron ore lump ore discharged from the material outlet 107 of the reciprocating swinging belt conveyor 1 is less than 3%, and the powder content in the iron ore lump ore is less than 5%.
The reciprocating swing type belt conveyor provided by the invention is adopted to pretreat the lump ore, the dried lump ore obtained after the pretreatment is conveyed to a blast furnace, and the addition amount of the lump ore in raw materials added to the blast furnace can be increased to 30%. Because the iron content in the lump ore is higher than that of the sintered ore and the pellet ore, the addition amount of the pretreated lump ore is increased in the blast furnace, and the yield of the obtained molten iron can be increased by 10-30% through the blast furnace smelting process.

Claims (12)

1. A reciprocating swing type belt machine characterized in that: the reciprocating swing type belt conveyor (1) comprises a distribution plate (101), a horizontal driving device (102) and a swing driving device (103); the horizontal driving device (102) is connected with the distribution plate (101) and drives the distribution plate (101) to move along the length direction of the reciprocating swing type belt conveyor (1); the swing driving device (103) is connected with the distribution plate (101) and drives the distribution plate (101) to swing along the width direction of the reciprocating swing type belt machine (1) or drives the distribution plate (101) to swing along the length direction of the reciprocating swing type belt machine (1); the reciprocating swing type belt conveyor (1) is provided with a heat medium inlet (104), a heat medium outlet (105), a material inlet (106) and a material outlet (107); the material inlet (106) is arranged at the front end of the distribution plate (101), and the material outlet (107) is arranged at the tail end of the distribution plate (101); the distribution plate (101) is provided with a sieve hole (10101).
2. The reciprocating oscillating belt machine of claim 1, wherein: the reciprocating swing type belt machine (1) also comprises a hood (108), the distribution plate (101) is arranged in the hood (108), and the heat medium inlet (104) and the heat medium outlet (105) are arranged on the hood (108);
preferably, the heat medium inlet (104) is arranged at the upper part or the top part of the hood (108), and the heat medium outlet (105) is arranged at the lower part or the bottom part of the hood (108);
further preferably, the heat medium inlet (104) is arranged on the hood (108) and is positioned above the material outlet (107); the heat medium outlet (105) is arranged on the hood (108) and is positioned below the material inlet (106).
3. The reciprocating oscillating belt machine of claim 1 or 2, wherein: the reciprocating swing type belt machine (1) also comprises a bracket (109), and the distribution plate (101) is arranged on the bracket (109); the swing driving device (103) comprises a driving device (10303), and the driving device (10303) is connected with the distribution plate (101) through a bracket (109); the driving device (10303) is a servo motor;
preferably, the swing driving device (103) further comprises a transmission control shaft (10301), the driving device (10303) is connected with the bracket (109) through the transmission control shaft (10301) and drives the bracket (109) and the distribution plate (101) to swing along the width direction of the reciprocating swing type belt machine (1) or drives the bracket (109) and the distribution plate (101) to swing along the length direction of the reciprocating swing type belt machine (1); or
The swing driving device (103) further comprises a swing traction rope (10302), the driving device (10303) is connected with the support (109) through the swing traction rope (10302) and drives the support (109) and the distribution plate (101) to swing along the width direction of the reciprocating swing type belt machine (1) or drives the support (109) and the distribution plate (101) to swing along the length direction of the reciprocating swing type belt machine (1).
4. The reciprocating oscillating belt machine of any one of claims 1-3, wherein: the reciprocating swing type belt conveyor (1) further comprises a first moisture detection device (201); the first moisture detection device (201) is arranged at the material inlet (106); and/or
The reciprocating swing type belt conveyor (1) further comprises a second moisture detection device (202); the second moisture detection device (202) is arranged at the material outlet (107).
5. The reciprocating oscillating belt machine of any one of claims 1-4, wherein: the bottom of the reciprocating swing type belt conveyor (1) is provided with a powder outlet (110); and/or
The aperture of the sieve hole (10101) is 5-20mm, preferably 6-15mm, and more preferably 7-10 mm.
6. A method for the pre-treatment of iron ore lump ores using the reciprocating oscillating belt machine of any one of claims 1 to 5, the method comprising the steps of:
1) conveying iron ore blocks to be treated to a reciprocating swing type belt conveyor (1), wherein the iron ore blocks to be treated enter a material inlet (106) and are distributed on a distribution plate (101); a heat medium enters the reciprocating swing type belt conveyor (1) from a heat medium inlet (104);
2) the horizontal driving device (102) drives the distribution plate (101) to move along the length direction of the reciprocating swing type belt conveyor (1), and iron ore blocks move from the material inlet (106) to the material outlet (107) along with the distribution plate (101); the swing driving device (103) drives the distribution plate (101) to swing back and forth along the width direction of the reciprocating swing type belt conveyor (1) or drives the distribution plate (101) to swing back and forth along the length direction of the reciprocating swing type belt conveyor (1), and iron ore blocks slide on the distribution plate (101);
3) drying and screening iron ore blocks to be treated in a reciprocating swing type belt conveyor (1); the granular iron ore blocks are discharged from a material outlet (107) after being processed by the reciprocating swing type belt conveyor (1); the powdery iron ore lump ore is screened out through the sieve holes (10101) on the distribution plate (101) and then is discharged from the powder outlet (110); the heat medium exchanges heat with the iron ore lump ore and then is discharged from a heat medium outlet (105).
7. The method of claim 6, wherein: the method further comprises the following steps:
4) the granular iron ore lump ore discharged from the material outlet (107) is conveyed to the blast furnace system (3); and/or
5) The powdery iron ore lump ore discharged from the powder outlet (110) is conveyed to the sintering and batching system (4); and/or
6) The heat medium discharged from the heat medium outlet (105) is conveyed to the dust removal system (5).
8. The method according to claim 6 or 7, characterized in that: detecting the moisture content in the iron ore lump ore to be processed by a first moisture detecting device (201) while the iron ore lump ore to be processed is conveyed to a reciprocating swing type belt conveyor (1) in step 1); and/or
In step 3), while the granulated iron ore lump ore is discharged from the material outlet (107), the moisture content in the granulated iron ore lump ore discharged from the material outlet (107) is detected by the second moisture detecting means (202).
9. The method of claim 8, wherein: the moisture content in the iron ore lump ore to be treated entering the reciprocating swing type belt machine (1) is detected by a first moisture detection device (201) and is marked as W0And (c); setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemaxAnd (c); calculating the retention time t, h of the iron ore lump ore in the reciprocating swing type belt conveyor (1);
Figure FDA0002992905220000031
wherein: vMediumThe flow rate of the heat medium, m/s; t isMediumWhen the heat medium enters the reciprocating swing type belt machine (1)Temperature of (d), (c); k is a radical of1The retention time is a retention time adjusting constant, and the value is 0.1-1, preferably 0.2-0.8, and more preferably 0.3-0.6; at a flow velocity V of the heat mediumMediumThe temperature of the heat medium when it enters the reciprocating swing type belt conveyor (1) is TMediumUnder the condition that the retention time of the iron ore lump ore in the reciprocating swing type belt machine (1) is kept to be t, so that the moisture content of the granular iron ore lump ore discharged from the material outlet (107) of the reciprocating swing type belt machine (1) is lower than Wmax。
10. The method of claim 8, wherein: the moisture content in the iron ore lump ore to be processed entering the reciprocating swing type belt machine (1) is detected by a first moisture detection device (201) and is marked as W0And (c); setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnacemaxAnd (c); calculating the moving speed S, m/min of the distribution plate (101) driven by the horizontal driving device (102);
Figure FDA0002992905220000032
wherein: l is the length of the distribution plate (101), m; vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor (1) is DEG C; k is a radical of2The value of the moving speed adjusting constant is 1-10, preferably 1.25-5, and more preferably 1.67-3.33; at a flow velocity V of the heat mediumMediumThe temperature of the heat medium when it enters the reciprocating swing type belt conveyor (1) is TMediumUnder the condition that the moving speed of the distribution plate (101) driven by the horizontal driving device (102) is kept to be S, so that the moisture content in the granular iron ore block discharged from the material outlet (107) of the reciprocating swing type belt conveyor (1) is lower than Wmax。
11. The method according to any one of claims 8-10, wherein: the moisture content in the iron ore lump ore to be processed entering the reciprocating swing type belt machine (1) is detected by a first moisture detection device (201) and is marked as W0And (c); according to the requirements of blast furnace conditions, settingThe upper limit of the water content of the lump ore entering the blast furnace is WmaxAnd (c); detecting the content of powder mineral aggregate in the iron ore block ore to be processed entering the reciprocating swing type belt conveyor (1), and recording the content as M percent; calculating the swing frequency f, times/min of a distribution plate (101) driven by a swing driving device (103);
Figure FDA0002992905220000033
wherein: vMediumThe flow rate of the heat medium, m/s; t isMediumThe temperature of the heat medium entering the reciprocating swing type belt conveyor (1) is DEG C; k is a radical of3The value of the oscillation frequency adjusting constant is 0.1-0.6, preferably 0.2-0.5, and more preferably 0.25-0.4; the content of the powder mineral aggregate is the weight ratio of the mineral aggregate with the particle size smaller than 8mm to the whole iron ore lump ore; at a flow velocity V of the heat mediumMediumThe temperature of the heat medium when it enters the reciprocating swing type belt conveyor (1) is TMediumUnder the condition (1), the oscillating frequency f of the distribution plate (101) driven by the oscillating drive device (103) is maintained so that the moisture content in the granular iron ore block discharged from the material outlet (107) of the reciprocating oscillating belt conveyor (1) is lower than WmaxAnd the content of powder in the iron ore lump ore is less than 5 percent.
12. The method according to any one of claims 6-11, wherein: the heat medium is a heat source generated by the steel process; preferably, the heat medium is a heat source released by combustion of sintering circular cooler hot waste gas, blast furnace hot blast stove waste gas and coke oven gas/blast furnace gas/converter gas, and preferably sintering circular cooler hot waste gas and blast furnace hot blast stove waste gas; and/or
The temperature of the heat medium entering the reciprocating oscillating belt conveyor (1) is more than 100 ℃, preferably more than 150 ℃; and/or the air flow speed of the heat medium entering the reciprocating swing type belt conveyor (1) is 0.1-4 m/s, preferably 0.3-3 m/s, and more preferably 0.5-2 m/s.
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CN209715658U (en) * 2019-01-21 2019-12-03 湖南橡塑密封件厂有限公司 A kind of rubber seal drying screening plant
CN209034843U (en) * 2019-03-27 2019-06-28 海口诚科工程检测咨询有限公司 A kind of gradation of coarse aggregate screen analysis device
CN209914439U (en) * 2019-05-21 2020-01-10 陈光明 Agricultural seed processing equipment in agricultural field of high-efficient environmental protection
CN210952266U (en) * 2019-11-26 2020-07-07 广东石油化工学院 Continuous longan drying device
CN211782602U (en) * 2020-03-02 2020-10-27 安徽海蓝生物科技有限公司 Tartaric acid production is with fluidization drying device
CN111467894A (en) * 2020-04-10 2020-07-31 马鞍山钢铁股份有限公司 Drying and screening method for blast furnace lump ore
CN212418680U (en) * 2020-05-29 2021-01-29 洛阳天平分子筛有限公司 Novel carbon molecular sieve granulation equipment
CN111947420A (en) * 2020-07-03 2020-11-17 田琳琳 Biological medicine drying equipment
CN111854408A (en) * 2020-07-22 2020-10-30 马恒 Drying device is used in industrial chemicals processing

Cited By (3)

* Cited by examiner, † Cited by third party
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CN115218637A (en) * 2022-07-14 2022-10-21 宜兴市天石饲料有限公司 Drying equipment for quickly removing crystal slag for crystallizing betaine
CN118149575A (en) * 2024-05-11 2024-06-07 佛山市顺德区粤香食品制造有限公司 Improved cake powder uniformity drying equipment and method
CN118149575B (en) * 2024-05-11 2024-07-26 佛山市顺德区粤香食品制造有限公司 Improved cake powder uniformity drying equipment and method

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