CN217438237U - Scraper type hot direct reduced iron conveying device - Google Patents
Scraper type hot direct reduced iron conveying device Download PDFInfo
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- CN217438237U CN217438237U CN202221344922.0U CN202221344922U CN217438237U CN 217438237 U CN217438237 U CN 217438237U CN 202221344922 U CN202221344922 U CN 202221344922U CN 217438237 U CN217438237 U CN 217438237U
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Abstract
The utility model relates to a scraper type thermal state direct reduced iron conveying device, which comprises a thermal state direct reduced iron storage tank, a scraper thermal conveying device and a high-level stock bin system; the thermal state direct reduced iron storage tank is arranged below the shaft furnace and is used for hermetically storing and metering the thermal state direct reduced iron output from the bottom outlet of the shaft furnace in a heat preservation way; the scraper plate heat conveying device comprises a heat conveying groove structure, the first end of the heat conveying groove structure can be communicated with an outlet of the thermal state direct reduced iron storage tank, a plurality of scraper plates capable of moving along the heat conveying groove structure are arranged at the bottom of the heat conveying groove structure, and each scraper plate runs along the heat conveying groove structure to convey the thermal state direct reduced iron to the electric furnace; the high-level stock bin system is positioned above the scraper hot conveying device and used for feeding smelting materials into the hot conveying groove structure. The utility model discloses a simple and reliable mode has realized DRI heat between shaft furnace and the electric stove and has sent the hot dress, and adaptable different engineering application environment has reduced engineering investment, equipment fault rate and electric stove ton steel smelting power consumption, has improved production efficiency.
Description
Technical Field
The utility model relates to a steelmaking technical field especially relates to a scrape board-like hot state direct reduced iron conveyor.
Background
At present, in hydrogen metallurgy, Iron ore is Reduced in a gas-based shaft furnace mainly through a mixed gas of hydrogen and CO to obtain Direct Reduced Iron (DRI) which is used as a raw material for electric arc furnace steelmaking in the next procedure.
The DRI enters the next procedure of electric arc furnace steelmaking in two ways, namely a cold state and a hot state.
When the cold direct reduced iron is used as the raw material of the electric furnace, the DRI can be continuously fed into the furnace by adopting a conventional belt conveyor and a nitrogen sealed bin, the equipment is simple and reliable, and the production is stable and smooth. However, the cold direct reduced iron is used as the raw material for steelmaking, the energy consumption of the electric furnace is too high, and the steelmaking production cost of the electric furnace is increased.
The hot DRI is used as the raw material for electric furnace steelmaking, and the direct reduced iron at 600 ℃ brings certain physical heat to the electric furnace, so that the power consumption and smelting time for electric furnace steelmaking can be greatly reduced. Meanwhile, after the hot direct reduced iron is directly hot-charged into the electric furnace, the energy and materials used for cooling the hot direct reduced iron at the rear part of the direct reduction procedure can be reduced. The DRI can save electric energy by about 25 degrees per ton of steel when the temperature of the DRI in the electric furnace is increased by 100 ℃, the DRI can save electric energy by 150 degrees per ton of steel according to the charging temperature of 600 ℃, compared with the DRI fed into the furnace by cold charge, and the DRI can save 90 yuan per ton of steel cost according to the accounting of 0.6 yuan per degree.
Therefore, the method realizes the thermal state storage and transportation of the direct reduced iron between the hydrogen metallurgy process and the electric furnace process, and has important significance for saving energy and reducing consumption of the low-carbon steel-making process route of hydrogen metallurgy and an electric arc furnace.
However, the hot (about 600 ℃) direct reduced iron needs to be transported by adopting high-temperature resistant equipment in the process of being sent into a steel-making workshop, and meanwhile, the direct reduced iron must be prevented from contacting with air, otherwise, the problem of secondary oxidation is easy to occur.
The prior DRI hot charging electric furnace technology mainly comprises three technologies of gravity direct feeding, chain bucket transferring, pneumatic conveying and the like.
The pneumatic conveying method can realize the hot conveying of the direct reduced iron and the hot charging of the electric furnace, but the investment and the operation cost are high. The disadvantages of pneumatic conveying: (1) the power consumption is large; (2) the equipment is seriously abraded; (3) the conveyed materials are limited by the process, and the materials which are wet, easy to bond and fragile cannot be conveyed; (4) the pneumatic conveying is carried out in three bed states, and a continuous fluidized bed is used in the conveying process, so that the flow velocity of the materials is not easy to control.
The gravity conveying system designed according to the conditions of the shaft furnace and the electric furnace is also called a thermal connection system. It has the following disadvantages: the discharge hole of the direct reduced iron needs to be higher than the feeding hole of the electric furnace, so that the height of the shaft furnace foundation is greatly increased, and the engineering investment and the construction difficulty are increased. Meanwhile, the method requires that the shaft furnace is arranged close to the electric furnace, and limits the process arrangement of the electric furnace to a certain extent.
The prior art is concerned with a heat resistant container tanker delivery system. This system requires the use of a slat conveyor to effect lateral movement of the hot DRI.
In the prior art, a skirt plate bucket type conveying system is a material basket protection conveying system. Any charging basket is developed by adopting refractory materials and is specially designed for conveying hot materials. The bottom of the bucket is provided with an integrated cross beam. The frequency controlled motor enables the conveying speed to be matched to varying conveying capacities. In addition, the drive or bucket height monitoring system is part of the apparatus. The technology has the advantages of complex structure, high engineering investment, high equipment failure rate and high maintenance cost, and is not beneficial to popularization and use.
In the prior art, a chain bucket type hot direct reduced iron conveyor (CN102161423B) can be theoretically used for conveying hot direct reduced iron, but the hot direct reduced iron is a high-temperature material, the temperature resistance of a conventional conveying system can only reach about 250 ℃, the tapping temperature of the hot direct reduced iron is generally about 600-850 ℃, and the problem of hopper thermal deformation failure exists; the chain wheel form and the hopper form have the problem of vibration of a chain system, and because the mass of the material conveying hopper, the material and the chain link is large, the generated inertia force is also large, and the impact of the chain wheel is large. The impact caused by the polygon effect is not negligible because of the long conveying distance and the heavy equipment of the integrated steel plant.
Therefore, the inventor provides a scraper type hot state direct reduced iron conveying device by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a scrape board-like hot state direct reduced iron conveyor, the utility model discloses a simple and reliable mode has realized that DRI heat is sent the hot dress between shaft furnace and the electric stove, and adaptable different engineering application environment has compared in other schemes such as apron board bucket type and has simplified equipment structure greatly, has reduced engineering investment, equipment failure rate and cost of maintenance, electric stove ton steel smelting power consumption, has improved production efficiency.
The utility model aims at realizing the method, and the scraper type thermal state direct reduced iron conveying device comprises a thermal state direct reduced iron storage tank, a scraper thermal conveying device and a high-level stock bin system; the thermal state direct reduced iron storage tank is arranged below the shaft furnace and is used for hermetically storing thermal insulation and metering thermal state direct reduced iron output from an outlet at the bottom of the shaft furnace; the scraper hot conveying device is arranged below the thermal state direct reduced iron storage tank and comprises a hot conveying groove structure, a first end of the hot conveying groove structure can be communicated with an outlet of the thermal state direct reduced iron storage tank, a second end of the hot conveying groove structure is provided with a discharge hole, the discharge hole can be communicated with an electric furnace, the bottom of the hot conveying groove structure is provided with a plurality of scrapers capable of moving along the hot conveying groove structure, and each scraper runs along the hot conveying groove structure to convey the thermal state direct reduced iron to the electric furnace; the high-level stock bin system is positioned above the scraper hot conveying device and used for feeding smelting materials into the hot conveying groove structure.
The utility model discloses an in a preferred embodiment, the hot device that send of scraper blade is including setting up in the gear motor who sends the one end of groove structure hot, gear motor is last to connect first sprocket, send the structural chain that sets up of groove hot, the chain cover is located on the first sprocket, each the parallel and interval connection of scraper blade in on the chain, gear motor drags through first sprocket the chain area is each the material that the scraper blade promoted to send the inslot structure hot removes to the discharge gate.
The utility model discloses an in a preferred embodiment, gear motor set up in the hot second end that send the groove structure, the first end that sends the groove structure of heat sets up the second sprocket, the chain cover is located on the second sprocket, the hot first end that sends the groove structure still set up with the straining device that the second sprocket is connected.
In a preferred embodiment of the present invention, the reduction motor is coupled to the first sprocket through a coupling.
In a preferred embodiment of the present invention, a sealing cover capable of sealing the hot feed trough structure from the top is disposed above the hot feed trough structure, and a sealing chamber is formed between the sealing cover and the hot feed trough structure; the top of the sealed bin is provided with a first feeding port, and an outlet of the thermal state direct reduced iron storage tank is communicated with the first feeding port.
In a preferred embodiment of the present invention, the hot feeding structure comprises a feeding trough and a discharging trough, the bottom of the feeding trough and the bottom of the discharging trough are respectively provided with the chain, each of which is provided with a plurality of scrapers in parallel and at intervals.
In a preferred embodiment of the present invention, a sealing gas pipe is disposed at the top of the hot feed trough structure, and the sealing gas pipe is used for blowing inert gas into the sealing bin to reduce the secondary oxidation of the hot direct reduced iron.
In a preferred embodiment of the present invention, the hot feeding structure comprises a bucket body, and a heat insulation lining is disposed in the bucket body.
In a preferred embodiment of the present invention, the scraper is made of a cast iron plate, a heat-resistant and wear-resistant alloy steel or a stainless steel material.
In a preferred embodiment of the present invention, the chain is made of heat-resistant and wear-resistant alloy steel or stainless steel.
In a preferred embodiment of the present invention, the thermal state direct reduced iron storage tank includes a first shell, and a tank liner is disposed in the first shell; the top of the thermal state direct reduced iron storage tank is provided with a first valve capable of being automatically closed, the bottom of the thermal state direct reduced iron storage tank is provided with a second valve capable of being automatically closed, the thermal state direct reduced iron storage tank is communicated with a high temperature resistant chute through the second valve, and the bottom of the high temperature resistant chute is communicated with a first end of the hot feeding groove structure; the thermal state direct reduced iron storage tank is supported and arranged on a first tank body support, and a weighing device is arranged at the bottom of the first tank body support.
From top to bottom, the utility model discloses a scrape board-like hot state direct reduced iron conveyor has following beneficial effect:
in the utility model, the thermal state direct reduced iron storage tank is arranged below the shaft furnace, and the gravity blanking of the thermal state direct reduced iron is utilized to realize the transfer of the thermal state DRI, thereby reducing the lifting and climbing in the traditional DRI conveying process and reducing the energy consumption; the thermal state direct reduced iron storage tank can hermetically store and measure the thermal state direct reduced iron output from the bottom outlet of the shaft furnace in a heat preservation way, so that the functions of storing, measuring and hermetically conveying the thermal state DRI are realized, and the energy consumption in the conveying process is reduced; all scrapers of the scraper hot conveying device run along the hot conveying groove structure to push the thermal state DRI and the smelting materials to move towards the discharge hole; the utility model discloses a simple and reliable mode has realized DRI heat transfer hot charge between shaft furnace and the electric stove, and adaptable different engineering application environment has compared in other schemes such as apron board bucket type and has simplified equipment structure greatly, has reduced engineering investment, equipment fault rate and cost of maintenance, electric stove ton steel smelting power consumption (-125 kWh/t), has improved production efficiency.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1: does the schematic diagram of the scraper type thermal state direct reduced iron conveying device of the utility model.
FIG. 2: do the utility model discloses a scraper blade heat is sent the plan view of device.
FIG. 3: is an enlarged view at a in fig. 2.
FIG. 4: is a cross-sectional view at B-B in fig. 2.
In the figure:
100. a scraper type hot direct reduced iron conveying device;
1. a thermal state direct reduced iron storage tank; 11. a first valve; 12. a second valve; 13. a high-temperature resistant chute; 14. a thermal expansion joint;
2. a scraper heat-conveying device;
21. a hot feed trough structure; 211. a feeding trough; 212. a discharging groove; 213. sealing the gas pipe; 214. a heat insulation slot liner;
22. a squeegee;
23. a reduction motor;
24. a first sprocket;
25. a chain;
26. a second sprocket;
27. a tensioning device;
28. a sealing cover; 281. a first feeding port; 282. a second feeding port;
3. an elevated bunker system;
4. a shaft furnace;
5. an electric furnace.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
The specific embodiments of the present invention described herein are for the purpose of explanation only and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 4, the present invention provides a scraper-type thermal state direct reduced iron conveying device 100, which comprises a thermal state direct reduced iron storage tank 1, a scraper thermal conveying device 2 and a high-level stock bin system 3; the thermal state direct reduced iron storage tank 1 is arranged below the shaft furnace 4, and the thermal state direct reduced iron storage tank 1 is used for hermetically storing thermal insulation and metering thermal state direct reduced iron output from an outlet at the bottom of the shaft furnace 4; the scraper hot conveying device 2 is arranged below the thermal state direct reduced iron storage tank 1, the scraper hot conveying device 2 comprises a hot conveying groove structure 21, a first end of the hot conveying groove structure 21 can be communicated with an outlet of the thermal state direct reduced iron storage tank 1, a second end of the hot conveying groove structure 21 is provided with a discharge hole, the discharge hole can be communicated with the electric furnace 5, the bottom of the hot conveying groove structure 21 is provided with a plurality of scrapers 22 capable of moving along the hot conveying groove structure, and each scraper 22 operates along the hot conveying groove structure to convey the thermal state direct reduced iron to the electric furnace 5; the high-level stock bin system 3 is positioned above the scraper heat conveying device 2, and the high-level stock bin system 3 is used for feeding smelting materials (materials such as slagging materials and alloys for electric furnaces) into the heat conveying groove structure 21.
The hot state direct reduced iron storage tank 1 is arranged below the shaft furnace 4, hot state direct reduced iron (hot state DRI, 500-800 ℃) reduced by the shaft furnace (shaft furnace reactor) enters the hot state direct reduced iron storage tank 1 under the action of gravity, the hot state direct reduced iron storage tank 1 has the functions of sealing, heat preservation and weighing, when DRI needs to be added into a downstream electric furnace, the hot state DRI falls into the scraper hot feeding device 2 from the hot state direct reduced iron storage tank 1, and the scraper hot feeding device 2 conveys the hot state DRI to a charging hopper (high temperature resistant charging hopper) of the DRI on the top of the electric furnace.
In the scraper heat feeder 2, the scrapers 22 are operated along the heat feed chute structure to move the hot DRI and the smelting materials (slag and alloy materials for electric furnaces) toward the discharge port, and finally, the DRI and the smelting materials are fed to the electric furnace 5.
The scraper type hot-state direct reduced iron conveying device 100 can be used alone or in combination to adapt to different application scenes.
In the scraper type hot direct reduced iron conveying device, the hot direct reduced iron storage tank is arranged below the shaft furnace, and the gravity blanking of the hot direct reduced iron is utilized to realize the transfer of the hot DRI, so that the lifting and climbing in the traditional DRI conveying process are reduced, and the energy consumption is reduced; the thermal state direct reduced iron storage tank can hermetically store and measure the thermal state direct reduced iron output from the bottom outlet of the shaft furnace in a heat preservation way, so that the functions of storing, measuring and hermetically conveying the thermal state DRI are realized, and the energy consumption in the conveying process is reduced; all scrapers of the scraper hot conveying device run along the hot conveying groove structure to push the thermal state DRI and the smelting materials to move towards the discharge hole; the utility model discloses a simple and reliable mode has realized DRI heat and has sent the hot dress between shaft furnace and the electric stove, and adaptable different engineering application environment has compared in other schemes such as skirtboard bucket type and has simplified equipment structure greatly, has reduced engineering investment, equipment fault rate and cost of maintenance, electric stove ton steel smelting power consumption (-125 kWh/t), has improved production efficiency.
Further, as shown in fig. 1 and fig. 2, the scraper heat-conveying device 2 includes a speed-reducing motor 23 disposed at one end of the heat-conveying trough structure 21, a first sprocket 24 is connected to the speed-reducing motor 23, a chain 25 is disposed in the heat-conveying trough structure 21, the chain 25 is sleeved on the first sprocket 24, the scrapers 22 are connected to the chain 25 in parallel and at intervals, and the speed-reducing motor 23 drags the chain 25 through the first sprocket 24 to drive the scrapers 22 to push the material in the heat-conveying trough structure 21 to move toward the discharge hole.
Further, as shown in fig. 1 and fig. 2, in an embodiment of the present invention, the speed reduction motor 23 is disposed at the second end (head) of the hot feeding groove structure, the second sprocket 26 is disposed at the first end (tail) of the hot feeding groove structure, the chain 25 is sleeved on the second sprocket 26, and the tensioning device 27 connected to the second sprocket 26 is further disposed at the first end of the hot feeding groove structure.
Further, the reduction motor 23 is coupled to the first sprocket 24 by a coupling. The speed reducing motor 23 controls the running speed of the chain, namely the feeding speed of the scraper heat conveying device 2 in a frequency conversion mode.
Further, as shown in fig. 1 and fig. 2, a sealing cover 28 capable of sealing the hot feed trough structure from the top is arranged above the hot feed trough structure 21, and a sealing bin is formed between the sealing cover 28 and the hot feed trough structure 21; the top of the sealed bin is provided with a first feeding port 281, and the outlet of the thermal state direct reduced iron storage tank 1 is communicated with the first feeding port 281. The top of the sealed bin is also provided with a second feeding port 282, the outlet of the high-position bin system 3 is communicated with the second feeding port 282, and smelting materials (such as slag making materials and alloys for electric furnaces) are input into the hot feeding groove structure 21 through the high-temperature resistant chute and the second feeding port 282 by the high-position bin system 3.
Further, as shown in fig. 2, 3, and 4, the hot feed chute structure 21 includes a feeding chute 211 and a discharging chute 212, wherein chains 25 are respectively provided at the bottoms of the feeding chute 211 and the discharging chute 212, and a plurality of scrapers 22 are provided in parallel and at intervals on each chain 25. The chain 25 and scraper 22 run in the feed chute 211 with DRI, which falls into the furnace after the discharge, and scraper 22 returns from the discharge chute 212 to the first (feed) end to complete the cyclic reciprocating motion of scraper 22.
Further, as shown in fig. 4, a sealing gas pipe 213 is disposed at the top of the hot feed tank structure 21, and the sealing gas pipe 213 is used for blowing an inert gas (mostly nitrogen) into the sealed bin to reduce the secondary oxidation of the hot direct reduced iron.
Further, as shown in fig. 4, the hot runner structure 21 includes a bucket body, and a heat insulating tank liner 214 is provided in the bucket body. In an embodiment of the present invention, the heat-feeding groove structure 21 is formed by combining the inner surface heat-resistant stainless steel + the nano composite high temperature-resistant heat-insulating groove lining 214+ the low carbon steel plate (the groove hopper body) to bear the high temperature of 500-800 ℃ of the thermal DRI, and reduce the dissipation of heat.
Further, the scraper 22 is made of cast iron plate, heat-resistant wear-resistant alloy steel or stainless steel material to bear the high temperature of 500-800 ℃ of the hot DRI.
Further, the chain 25 is made of heat-resistant and wear-resistant alloy steel or stainless steel material to bear the high temperature of 500-800 ℃ of the hot DRI.
Further, the thermal state direct reduced iron storage tank 1 comprises a first tank shell (steel shell), a tank inner liner is arranged in the first tank shell, and the tank inner liner is a nano composite high temperature resistant heat insulation inner liner so as to bear the high temperature of 500-800 ℃ of the thermal state DRI and reduce the heat loss; the top of the thermal state direct reduced iron storage tank is provided with a first valve 11 capable of being automatically closed, the bottom of the thermal state direct reduced iron storage tank is provided with a second valve 12 capable of being automatically closed, the thermal state direct reduced iron storage tank is communicated with a high temperature resistant chute 13 through the second valve 12, and the bottom of the high temperature resistant chute 13 is communicated with a first end of a hot feeding groove structure 21; the thermal state direct reduced iron storage tank is supported and arranged on a first tank body support, and a weighing device is arranged at the bottom of the first tank body support. The hot state direct reduced iron storage tank 1 is arranged below the shaft furnace, a tank lining is arranged inside the hot state direct reduced iron storage tank, and a first valve and a second valve which can be automatically closed are respectively arranged at the top and the bottom of the hot state direct reduced iron storage tank, so that the functions of feeding, discharging and buffering storage of hot state DRI are realized.
The high-temperature resistant chute 13 comprises a pipe shell, a pipe lining is arranged in the pipe shell, and the pipe lining is a nano composite high-temperature resistant heat insulation lining so as to bear the high temperature of 500-800 ℃ of the thermal DRI and reduce the heat loss; the top of the high-temperature resistant chute 13 is connected with the hot direct reduced iron storage tank through a thermal expansion joint 14 so as to reduce the self thermal stress.
The scraper-type hot-state direct reduced iron conveying method adopting the scraper-type hot-state direct reduced iron conveying device 100 comprises the following steps:
step a: adding the thermal state direct reduced iron in the shaft furnace 4 into the thermal state direct reduced iron storage tank 1, and storing and metering the thermal state direct reduced iron in the thermal state direct reduced iron storage tank 1;
specifically, the bottom outlet of the shaft furnace 4 is communicated with the top of the thermal state direct reduced iron storage tank 1 through a chute, the thermal state DRI is dropped to the thermal state direct reduced iron storage tank 1 by gravity, and the thermal state DRI is stored in the thermal state direct reduced iron storage tank 1 with the functions of sealing, heat preservation and weighing;
step b: adding the thermal state direct reduced iron in the thermal state direct reduced iron storage tank 1 into the scraper hot conveying device 2 through a high temperature resistant chute 13;
when the DRI needs to be added into the downstream electric furnace, a second valve 12 at the bottom of the hot direct reduced iron storage tank 1 is opened, and the hot DRI falls into the scraper hot-feeding device 2 through a high-temperature resistant chute 13;
step c: starting the scraper plate hot conveying device 2 to start hot DRI conveying;
starting a speed reducing motor 23, wherein the speed reducing motor 23 drags a chain 25 to drive each scraper 22 to continuously run through a first chain wheel 24, and each scraper 22 pushes the materials in the hot conveying groove structure 21 to move towards a discharge hole;
step d: the high-level stock bin system 3 is started, smelting materials (materials such as slag making materials and alloys for the electric furnace) are added into the scraper hot conveying device 2 through the vibrating feeder (the prior art), the belt conveyor (the prior art) and the elephant trunk, the smelting materials (materials such as slag making materials and alloys for the electric furnace) are mixed with hot direct reduced iron in the scraper hot conveying device 2, and each scraper 22 pushes the materials in the hot conveying groove structure 21 to move towards a discharge hole and convey the materials to a charging hopper at the top of the electric furnace.
From top to bottom, the utility model discloses a scrape board-like hot state direct reduced iron conveyor has following beneficial effect:
in the utility model, the thermal state direct reduced iron storage tank is arranged below the shaft furnace, and the gravity blanking of the thermal state direct reduced iron is utilized to realize the transfer of the thermal state DRI, thereby reducing the lifting and climbing in the traditional DRI conveying process and reducing the energy consumption; the thermal state direct reduced iron storage tank can hermetically store and measure the thermal state direct reduced iron output from the bottom outlet of the shaft furnace in a heat preservation way, so that the functions of storing, measuring and hermetically conveying the thermal state DRI are realized, and the energy consumption in the conveying process is reduced; all scrapers of the scraper hot conveying device run along the hot conveying groove structure to push the thermal state DRI and the smelting materials to move towards the discharge hole; the utility model discloses a simple and reliable mode has realized DRI heat transfer hot charge between shaft furnace and the electric stove, and adaptable different engineering application environment has compared in other schemes such as apron board bucket type and has simplified equipment structure greatly, has reduced engineering investment, equipment fault rate and cost of maintenance, electric stove ton steel smelting power consumption (-125 kWh/t), has improved production efficiency.
The above description is only illustrative of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (11)
1. A scraper type thermal state direct reduced iron conveying device is characterized by comprising a thermal state direct reduced iron storage tank, a scraper thermal conveying device and a high-level stock bin system; the thermal state direct reduced iron storage tank is arranged below the shaft furnace and is used for hermetically storing thermal insulation and metering thermal state direct reduced iron output from an outlet at the bottom of the shaft furnace; the scraper hot conveying device is arranged below the thermal state direct reduced iron storage tank and comprises a hot conveying groove structure, a first end of the hot conveying groove structure can be communicated with an outlet of the thermal state direct reduced iron storage tank, a discharge port is arranged at a second end of the hot conveying groove structure and can be communicated with an electric furnace, a plurality of scrapers capable of moving along the hot conveying groove structure are arranged at the bottom of the hot conveying groove structure, and each scraper operates along the hot conveying groove structure to convey the thermal state direct reduced iron to the electric furnace; the high-level stock bin system is positioned above the scraper hot conveying device and used for feeding smelting materials into the hot conveying groove structure.
2. The scraper-type thermal state direct reduced iron conveying device according to claim 1, wherein the scraper thermal conveying device comprises a speed reduction motor arranged at one end of the thermal conveying groove structure, the speed reduction motor is connected with a first chain wheel, a chain is arranged in the thermal conveying groove structure, the chain is sleeved on the first chain wheel, the scrapers are connected to the chain in parallel at intervals, and the speed reduction motor drives the chain to drive the scrapers to push the materials in the thermal conveying groove structure to move towards the discharge hole through the first chain wheel.
3. The scraper-type hot-state direct reduced iron conveying device according to claim 2, wherein the speed reduction motor is disposed at the second end of the hot feeding groove structure, the first end of the hot feeding groove structure is provided with a second chain wheel, the chain is sleeved on the second chain wheel, and the first end of the hot feeding groove structure is further provided with a tension device connected with the second chain wheel.
4. The scraper-type hot-state direct reduced iron conveying apparatus according to claim 2, wherein said speed reduction motor is coupled to said first sprocket by a coupling.
5. The scraper-type hot-state direct reduced iron conveying apparatus as claimed in claim 2, wherein a sealing cover capable of sealing said hot feed trough structure from the top is provided above said hot feed trough structure, and a sealing bin is formed between said sealing cover and said hot feed trough structure; the top of the sealed bin is provided with a first feeding port, and an outlet of the thermal state direct reduced iron storage tank is communicated with the first feeding port.
6. The scraper-type hot-state dri conveying apparatus according to claim 5, wherein said hot feed trough structure comprises a feeding trough and a discharging trough, said feeding trough and said discharging trough having chains respectively disposed at bottoms thereof, and a plurality of said scrapers being disposed in parallel and at intervals on each of said chains.
7. The scraper-type hot-state dri conveyor according to claim 5, wherein a sealing gas pipe is provided at the top of said hot-feed trough structure, said sealing gas pipe being used for blowing inert gas into said sealing bin to reduce secondary oxidation of hot-state dri.
8. The scraped-surface hot-state DRI conveyor according to claim 5, wherein said hot-trough structure comprises a hopper body in which a heat-insulating lining is provided.
9. The scraper hot state dri delivery apparatus as claimed in claim 2, wherein said scraper is made of cast iron plate, heat and wear resistant alloy steel or stainless steel material.
10. The scraper-type hot-state dri conveying apparatus as claimed in claim 2, wherein said chain is made of heat-resistant and wear-resistant alloy steel or stainless steel.
11. The scraped-surface hot-state direct reduced iron conveying apparatus according to claim 2, wherein the hot-state direct reduced iron storage tank comprises a first casing in which a tank liner is provided; the top of the thermal state direct reduced iron storage tank is provided with a first valve capable of being automatically closed, the bottom of the thermal state direct reduced iron storage tank is provided with a second valve capable of being automatically closed, the thermal state direct reduced iron storage tank is communicated with a high temperature resistant chute through the second valve, and the bottom of the high temperature resistant chute is communicated with a first end of the hot feeding groove structure; the thermal state direct reduced iron storage tank is supported and arranged on a first tank body support, and a weighing device is arranged at the bottom of the first tank body support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221344922.0U CN217438237U (en) | 2022-05-31 | 2022-05-31 | Scraper type hot direct reduced iron conveying device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221344922.0U CN217438237U (en) | 2022-05-31 | 2022-05-31 | Scraper type hot direct reduced iron conveying device |
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| CN217438237U true CN217438237U (en) | 2022-09-16 |
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|---|---|---|---|
| CN202221344922.0U Active CN217438237U (en) | 2022-05-31 | 2022-05-31 | Scraper type hot direct reduced iron conveying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854932A (en) * | 2022-05-31 | 2022-08-05 | 中冶京诚工程技术有限公司 | Scraper type hot direct reduced iron conveying device and method |
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2022
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854932A (en) * | 2022-05-31 | 2022-08-05 | 中冶京诚工程技术有限公司 | Scraper type hot direct reduced iron conveying device and method |
| CN114854932B (en) * | 2022-05-31 | 2023-08-15 | 中冶京诚工程技术有限公司 | Scraper type hot direct reduced iron conveying device and method |
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