CN107034356A - A kind of method of microwave tunnel kiln reduction apparatus and its smart iron ore of reduction - Google Patents
A kind of method of microwave tunnel kiln reduction apparatus and its smart iron ore of reduction Download PDFInfo
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- CN107034356A CN107034356A CN201710321882.5A CN201710321882A CN107034356A CN 107034356 A CN107034356 A CN 107034356A CN 201710321882 A CN201710321882 A CN 201710321882A CN 107034356 A CN107034356 A CN 107034356A
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- China
- Prior art keywords
- microwave
- truck
- tunnel kiln
- noble gas
- reduction apparatus
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Classifications
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- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/212—Sintering; Agglomerating in tunnel furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
Abstract
The invention discloses a kind of microwave tunnel kiln reduction apparatus and using the method for the device reduced iron concentrate, the device includes microwave unit, cooling unit, ore grinding unit and the magnetic separating unit that order is set successively, and microwave unit placement is in orbit；Microwave unit includes the truck, the microwave generator above truck and travel mechanism that can be moved in orbit；Having on the support baseboard of truck on discharging opening, discharging opening has movable floor；Microwave unit be one or continuously arrange two and more than.Its method include with batch mixer by Iron concentrate, carbonaceous reducing agent and desulphurizer mixing it is uniform after, supplying binding agent carry out pressure ball, dried pressure ball is heated with microwave, carry out carbon thermal reduction, in noble gas storage tank cool down after mill select, obtain magnetic concentrate.The rapidly and efficiently reduction for realizing iron ore concentrate that the present invention is heated using microwave, compared to other direct reduction iron making methods, energy consumption is lower, and production efficiency is higher, and product quality is also more stable.
Description
Technical field
The present invention relates to ore smelting technical field of research, more particularly to a kind of microwave tunnel kiln reduction apparatus and use should
The method of device reduced iron concentrate.
Background technology
In the prior art, blast furnace ironmaking is usually required to coordinate coking and sintering circuit, and the two processes can be produced largely
SO2And NOx, cause serious environmental pollution.The preparation of direct reduction iron making is typically using carbonaceous reducing agent (coal or also Primordial Qi)
It is metallic iron directly by reduction of iron ore, has the advantages that flow is short, product quality stable, compared with blast furnace ironmaking flow, no
Coking and sintering are needed, it is environment-friendly, with more significant advantage and bigger development potentiality.
At present, the prevailing technology of direct reduction iron making is rotary kiln and shaft furnace.Rotary kiln for directly reducing flow relies on burner
Combusting heavy oil or coal gas maintain kiln temperature, and shaft kiln directly reduced flow maintains stove by the sensible heat and reaction heat for entering stove also Primordial Qi
Interior temperature.Because both flows are all mainly heated using external heating mode to material, therefore material heating is slow, energy utilization
Efficiency is relatively low.
Therefore, a kind of reliable iron ore concentrate reduction apparatus and restoring method are sought so that in reduction process, heating is rapid,
Capacity usage ratio is high, and can realize serialization, large-scale production, DRI, ferroalloy production, ilmenite reduction and
Steel dust and mud reduction field has great application value.
The content of the invention
For above prior art exist defect, it is a primary object of the present invention to overcome the deficiencies in the prior art it
Place, discloses a kind of microwave tunnel kiln reduction apparatus, and it includes the microwave unit, cooling unit, ore grinding list that order is set successively
Member and magnetic separating unit, the microwave unit placement are in orbit；Wherein,
The microwave unit includes the truck that can be moved on the track, the microwave generation being arranged on above truck
Device, the travel mechanism for driving the microwave generator and truck movement；
The truck, which includes being provided with support baseboard and compartment, the support baseboard on discharging opening, the discharging opening, to be covered
Equipped with movable floor；
The microwave unit be one or continuously arrange two and more than.
Further, the cooling unit includes being arranged on the noble gas storage tank below the track；
The noble gas storage tank, which includes top, to be had the tank body of opening, the removable cover being arranged in opening, is opened positioned at described
Material outlet, the discharge gate being arranged at material outlet, gas access immediately below mouthful, noble gas entrance, it is arranged on tank body
Gas vent, buffer board and the first reinforcing wearing plate for accepting the material slided on buffer board in portion；
The gas access and noble gas entrance are arranged on the side wall of the tank body, and the gas access and noble gas entrance
It is disposed as the mouth of pipe of escape pipe down, the inclined underface for being placed in the opening of the buffer board, described first reinforces
The level height of wearing plate one end is higher than the level height of the other end, and the higher one end of level height is connected to noble gas storage tank
On inwall；
The size of the opening is more than the size of the discharging opening.
Further, the noble gas storage tank also includes being used to accept the second reinforcing for sliding material by the first reinforcing wearing plate
Wearing plate, the second reinforcing wearing plate is snugly arranged on the tilt internal wall of tank base.
Further, the microwave unit also includes outer cover, measure and control device and the electricity of electric energy is provided for the measure and control device
Source, the outer cover is located at the surface of the truck, and the microwave generator is placed in the outer cover lower surface, the outer cover
On be additionally provided with flue；
The measure and control device is connected respectively to be also associated with being placed on microwave generator and travel mechanism, the measure and control device
Thermocouple in the truck.
Further, the part beyond the thermometric end of the thermocouple is coated with non-microwave absorbing material.
Embodiments of the invention additionally provide a kind of method using above-mentioned microwave tunnel kiln reduction apparatus reduced iron concentrate,
Comprise the following steps：
1) it is Iron concentrate, carbonaceous reducing agent and desulphurizer mixing is uniform；
2) by step 1) mixture supplying binding agent carry out pressure ball；
3) by step 2) dry bulb is obtained after the green-ball drying that obtains after pressure ball, and it is also original-pack that dry bulb is added into microwave tunnel kiln
In the truck put, microwave heating is carried out using microwave generator and is reduced directly dry bulb, metallized pellet is obtained；
4) by step 3) obtained metallized pellet grinds choosing after being cooled down in noble gas storage tank, obtains magnetic concentrate.
Preferably,
Step 1) in, TFe mass percent is 52~68% in the Iron concentrate, including v-ti magnetite tantalite power and general
Mass percent >=75% of fixed carbon in the logical major class of Iron concentrate two, the carbonaceous reducing agent,
The mass ratio when Iron concentrate, carbonaceous reducing agent and desulfurizing agent batch mixing is 100:25-35：8-12,
The granularity of the Iron concentrate, carbonaceous reducing agent and desulfurizing agent is that the mass percent of -200 mesh is more than 85%；
The carbonaceous reducing agent is the one or more in graphite powder, coke, petroleum coke, anthracite；
The desulfurizing agent is the one or more in lime stone, dolomite or quick lime；
The binding agent is one or both of poly-vinyl alcohol solution, starch solution；
Step 2) in, the addition of the binding agent for the Iron concentrate, reducing agent and desulphurizer mixing thing gross mass 5~
10%；
It is 20~40min to be incorporated after binding agent with batch mixer incorporation time；
The pressure of the pressure ball is 12~20MPa；
Step 3) in, the drying temperature is 90~130 DEG C, and drying time is 2~4h；
The microwave frequency of the microwave generator is 300MHz~300kMHz, and microwave tube power is 15~30kW, the material
Vehicle interior temperature control is at 900~1100 DEG C, and the insulation reaction time of truck is 60~120min.
Preferably, step 4) be：The movable floor of the truck bottom is opened, the metallized pellet warp after insulation reduction
It is discharged into noble gas storage tank and is cooled down by the discharging opening, is cooled to the metallized pellet of room temperature after discharge gate discharge
Carry out mill choosing.
Preferably, the inert gas used in the noble gas storage tank is N2, one or more in Ar.
Preferably, step 4) in mill elect the mass percent of ore grinding first to the metallized pellet of -150 mesh as and be not less than
85%, magnetic separation is then carried out under 600~800Oe of magnetic field intensity and obtains magnetic concentrate and tailings.
The advantageous effects that the present invention is obtained are：
(1) present invention carries out microwave heating by microwave unit, realizes the reduction to iron ore concentrate etc., and heating is rapid, energy
Utilization rate is high, by setting more than two microwave units, it is possible to achieve serialization, the also original production of scale, simplifies life
Produce the technological process of high-quality sponge iron；
(2) using in the Magnetic Materials of microwave tunnel kiln reduction apparatus and the restoring method preparation of the present invention, TFe contents are high, S
Content is low, meets the quality requirements of steel-making sponge iron.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the following description of the accompanying drawings of embodiments
It is apparent and be readily appreciated that, wherein：
Fig. 1 is the microwave unit structural representation of the microwave tunnel kiln reduction apparatus of one embodiment of the invention；
Fig. 2 is the noble gas tank structure schematic diagram of the microwave tunnel kiln reduction apparatus of further embodiment of this invention；
Fig. 3 is the microwave unit of the microwave tunnel kiln reduction apparatus of further embodiment of this invention to during noble gas storage tank discharge
Top view；
Fig. 4 is the method flow diagram of the use microwave tunnel kiln reduction apparatus reduced iron concentrate of one embodiment of the invention；
Fig. 5 is the equipment connection diagram of the use microwave tunnel kiln reduction apparatus of further embodiment of this invention.
Wherein, 1, track, 2, truck, 21, support baseboard, 22, discharging opening, 23, movable floor, 3, microwave generator, 4,
Travel mechanism, 5, tank body, 51, removable cover, 52, material outlet, 53, discharge gate valve, 54, gas access, 55, noble gas entrance,
56th, gas vent, 57, buffer board, 58, first reinforces wearing plate, and 59, second reinforces wearing plate, and 6, outer cover, 61, flue, 7, survey
Control device, 8, power supply, 9, thermocouple.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.
One embodiment of the invention provides a kind of microwave tunnel kiln reduction apparatus, and it includes the microwave list that order is set successively
Member, cooling unit, ore grinding unit and magnetic separating unit；Wherein, as shown in figure 1, microwave unit is disposed on path 1, and microwave list
Member includes the truck 2, the microwave generator 3 for being arranged on the top of truck 2, drive microwave generator 3 and that can be moved on path 1
The travel mechanism 4 of truck movement.Truck 2 includes being provided with discharging opening 22 on support baseboard 21 and compartment, support baseboard 21, discharges
Lid is equipped with movable floor 23 on mouth 22；Microwave unit be one or continuously arrange two and more than.The present embodiment passes through microwave
Realize and the heating of iron ore concentrate reduced, heating is rapid, capacity usage ratio is high, microwave unit be set to two continuously arranged and with
When upper, preferably can using 8-15, microwave unit can along the continuous moving of track 1, can also better meet serialization,
The production of scale needs, while greatly simplifying the reducing process of iron ore concentrate.
In the another embodiment that the present invention is provided, on the basis of above-described embodiment, the microwave tunnel kiln reduction apparatus
Cooling unit include noble gas storage tank, as shown in Fig. 2 the noble gas storage tank include top there is the tank body 5 of opening, opening is arranged on
On removable cover 51, the material outlet 52 immediately below opening, the discharge gate being arranged at material outlet 52, gas enters
Mouthfuls 54, noble gas entrance 55, the gas vent 56 for being arranged on the top of tank body 5, buffer board 57 and slided for accepting on buffer board 57
Material first reinforce wearing plate 58；
Gas access 54 and noble gas entrance 55 are arranged on the side wall of tank body 5, and gas access 54 and noble gas entrance 55 are equal
It is set to the mouth of pipe of escape pipe down, the inclined underface for being placed in opening of buffer board 57, first reinforces the one end of wearing plate 58
Level height be higher than the level height of the other end, and the higher one end of level height is connected on the inwall of noble gas storage tank；For
Microwave unit is easy to implement to noble gas storage tank discharge, the size of the opening of noble gas storage tank is more than the size of the discharging opening 22 of truck 2.
As shown in figure 3, in use, the movable floor 23 of truck 2 is opened, material by the lower end of truck 2 the row of discharging opening 22
Go out, under gravity into after the opening of noble gas storage tank, fall on first on buffer board 57, and with the inclination side of buffer board 57
To continuing to fall, the first reinforcing wearing plate 58 is then dropped down onto, then slided to the thing of noble gas storage tank by the first reinforcing wearing plate 58
Material outlet 52, in the whereabouts and cooling procedure of material, the discharge gate valve 53 at noble gas storage tank material outlet 52, which is in, to close
Closed state, meanwhile, gas access 54 and noble gas entrance 55 have gas entrance respectively, with the material completion heat exchange fallen
Afterwards, discharged by the gas vent 56 positioned at noble gas storage tank top, after material completes heat exchange cooling, open discharge gate valve 53, will
Cool down after material discharge, feed again, carry out the cooling of next batch materials.
As the preferred of above-described embodiment, the second reinforcing wearing plate 59 is additionally provided with noble gas storage tank, second reinforcing is resistance to
Nog plate 59 is used to accept slides material by the first reinforcing wearing plate 58, and the second reinforcing wearing plate 59 is snugly arranged on the bottom of tank body 5
On the tilt internal wall in portion, it is to avoid after material is fallen, the damage to the bottom of tank body 5 is effectively increased the service life of noble gas storage tank, together
Shi Zengjia heat transfer effects.
In another embodiment of the present invention, as shown in figure 1, microwave unit also includes outer cover 6, measure and control device 7 and to survey
The power supply 8 that device 7 provides electric energy is controlled, outer cover 6 is located at the surface of truck 2, and microwave generator 3 is placed in the lower surface of outer cover 6,
Flue 61 is additionally provided with outer cover 6；Measure and control device 7 is connected respectively also to be connected on microwave generator 3 and travel mechanism 4, measure and control device 7
It is connected to the thermocouple 9 being placed in truck 2.Space of the compartment of truck 2 in a relative closure is made by the one side of outer cover 6,
Heat-energy losses in material reducing compartment, on the other hand, can as microwave generator 3 support frame, meanwhile, opened up on outer cover 6
Flue 61, in order to the discharge of the impurity such as the flue gas in course of reaction, is measured and is controlled the temperature of truck 2 by measure and control device 7,
And the movement of truck 2 on path 1.It is pointed out that the compartment material of truck 2 is preferred to use the resistance to material such as quartz, with full
The high temperature of sufficient reduction reaction needs.
On the basis of above-described embodiment, the part beyond the 3-5cm of thermocouple 9 thermometric end is coated with non-microwave absorption
Material, preferably coats metal tube, to prevent microwave interference；Meanwhile, inert gas is preferred to use N2, one or both of Ar.
As shown in figure 5, in another embodiment of the present invention, Iron concentrate, carbonaceous reducing agent and desulfurizing agent are introduced into batch mixer
After the completion of addition binding agent carries out pressure ball, pressure ball in ball press after the completion of batch mixing, batch mixing, wet bulb is dried, dried
After dry bulb feeding truck 2 in carries out microwave reduction, during microwave reduction, truck 2 constantly on path 1 before
Enter, forward travel distance is designed as, when truck 2 reaches the surface of noble gas storage tank, reaction is just completed, now, opens truck 2
Movable floor 23, the material that the material in truck 2 is unloaded after the completion of carrying out cooling treatment, cooling treatment to noble gas storage tank is entering
Row mill choosing, finally obtains end-product DRI.
In the above embodiment of the present invention, the grinding attachment for grinding choosing can select general milling machine, planetary ball mill
With rod mill etc., TFe mass percentage contents are 52~68% in Iron concentrate, including v-ti magnetite tantalite power and common Iron concentrate
Two major classes.Soaking time is 60-120min.
As shown in figure 4, the embodiment of the present invention additionally provides a kind of above-mentioned microwave tunnel kiln reduction apparatus reduced iron of use
The method of concentrate, comprises the following steps：
1) it is Iron concentrate, carbonaceous reducing agent and desulphurizer mixing is uniform；
2) by step 1) mixture supplying binding agent carry out pressure ball；
3) by step 2) dry bulb is obtained after the green-ball drying that obtains after pressure ball, and it is also original-pack that dry bulb is added into microwave tunnel kiln
In the truck 2 put, microwave heating is carried out using microwave generator 3 and is reduced directly dry bulb, metallized pellet is obtained；
4) by step 3) obtained metallized pellet grinds choosing after being cooled down in noble gas storage tank, obtains magnetic concentrate.
As the preferred of above-described embodiment, TFe mass percent is solid in 52~68%, carbonaceous reducing agent in Iron concentrate
Determine mass percent >=75% of carbon, mass ratio when Iron concentrate, carbonaceous reducing agent and desulfurizing agent batch mixing is 100:25-35：8-
12, the addition of binding agent is Iron concentrate, reducing agent and desulphurizer mixing thing gross mass 5~10%.
The granularity of Iron concentrate, carbonaceous reducing agent and desulfurizing agent is that the mass percent of -200 mesh is more than 85%.
Carbonaceous reducing agent is the one or more in graphite powder, coke, petroleum coke, anthracite；
Desulfurizing agent is the one or more in lime stone, dolomite or quick lime；
Binding agent is one or both of poly-vinyl alcohol solution, starch solution.
Step 1) in three kinds of starting materials mix incorporation time be 15~30min；
Step 2) in batch mixer incorporation time be 20~40min after supplying binding agent, the pressure of pressure ball for 12~
20MPa；
Step 3) in drying temperature be 90~130 DEG C, drying time be 2~4h.
Step 3) in microwave generator 3 microwave frequency be 300MHz~300kMHz, microwave tube power be 15~30kW,
Temperature control is at 900~1100 DEG C in truck 2, and the insulation reaction time of truck 2 is 60~120min.
Step 4) detailed process be：The movable floor 23 of the bottom of truck 2 is opened, the metallized pellet after insulation reduction
Be discharged into noble gas storage tank and cooled down via discharging opening 22, be cooled to the metallized pellet of room temperature by discharge gate discharge after carry out
Mill choosing.
Inert gas used in noble gas storage tank is N2, one or more in Ar or other inert gases.
Step 4) in mill elect the mass percents of ore grinding first to -150 mesh as and be not less than 85%, then in magnetic field intensity
Magnetic separation is carried out under 600~800Oe and obtains magnetic concentrate and tailings.
After microwave tunnel kiln reduction apparatus reduced iron concentrate using the present invention, the obtained selected middle TFe of magnetic ore deposit is not less than
92%.If iron-bearing material used is common Iron concentrate, the tailings that magnetic separation is obtained, the main component of its tailings is silica
With aluminum oxide, calcium oxide, the raw material of manufacture of cement can be used as.
Embodiment 1
TFe 68% Iron concentrate and fixed carbon are not less than to 75% anthracite, and quick lime is according to mass ratio 100:
25:8 ratio dispensing.The granularity of Iron concentrate, anthracite and quick lime is -200 mesh 85%.
Mixture batch mixer mixing 15min.The poly-vinyl alcohol solution of addition 5%, batch mixer mixing 20min, Ran Hou
Pressure ball under 12MPa pressure.Green-ball dries 2h at 90 DEG C.
Dry bulb is fitted into progress microwave carbon thermal reduction, 900 DEG C of reduction temperature, recovery time 60min in truck.
After reduction terminates, the movable floor of truck, the N that the metallized pellet of output is discharged into below truck are opened2Storage tank
In be cooled to room temperature, metallized pellet by removable cover enter tank body after fall on buffer board, successively slide afterwards to first plus
Gu wearing plate and second reinforces wearing plate, finally slide to discharge gate and discharge inertial gas tank after cooling and obtain cold ball
Group.Cold pelletizing is crushed to after -150 mesh 85% with ball mill, the magnetic separation under 600Oe magnetic field intensity.By analysis, gained magnetic
The TFe 93% of thing, S 0.012%, meet the quality requirements of steel-making sponge iron.
Embodiment 2
TFe68% Iron concentrate and fixed carbon are not less than to 75% anthracite, and quick lime is according to mass ratio 100:
35:12 ratio dispensing.The granularity of Iron concentrate, anthracite and quick lime is -200 mesh 100%.
Mixture batch mixer mixing 30min.The poly-vinyl alcohol solution of addition 10%, batch mixer mixing 40min, Ran Hou
Pressure ball under 20MPa pressure.Green-ball dries 4h at 130 DEG C.
Microwave carbon thermal reduction, 1100 DEG C of reduction temperature, recovery time are carried out in the track truck of dry bulb load map 1
120min。
After reduction terminates, the movable floor of truck, the N that the metallized pellet of output is discharged into below truck are opened2Storage tank
In be cooled to room temperature, metallized pellet by removable cover enter tank body after fall on buffer board, successively slide afterwards to first plus
Gu wearing plate and second reinforces wearing plate, finally slide to discharge gate and discharge N after cooling2Storage tank obtains cold pelletizing.Cold ball
Group is crushed to after -150 mesh 100% with ball mill, the magnetic separation under 800Oe magnetic field intensity.By analysis, gained Magnetic Materials
TFe 94%, S 0.011%, meets the quality requirements of steel-making sponge iron.
Embodiment 3
TFe 68% Iron concentrate and fixed carbon are not less than to 75% anthracite, and quick lime is according to mass ratio 100:
30:10 ratio dispensing.The granularity of Iron concentrate, anthracite and quick lime is -200 mesh 90%.
Mixture batch mixer mixing 20min.The poly-vinyl alcohol solution of addition 6%, batch mixer mixing 30min, Ran Hou
Pressure ball under 15MPa pressure.Green-ball dries 3h at 110 DEG C.
Microwave carbon thermal reduction, 1000 DEG C of reduction temperature, recovery time 90min are carried out in the track truck of dry bulb load map 1.
After reduction terminates, the movable floor of truck, the N that the metallized pellet of output is discharged into below truck are opened2Storage tank
In be cooled to room temperature, metallized pellet by removable cover enter tank body after fall on buffer board, successively slide afterwards to first plus
Gu wearing plate and second reinforces wearing plate, finally slide to discharge gate and discharge Ar storage tanks after cooling and obtain cold pelletizing.Cold ball
Group is crushed to after -150 mesh 90% with ball mill, the magnetic separation under 700Oe magnetic field intensity.By analysis, the TFe of gained Magnetic Materials
92%, S 0.013%, meets the quality requirements of steel-making sponge iron.
Embodiment 4
TFe 52% Iron concentrate and fixed carbon are not less than to 75% anthracite, and quick lime is according to mass ratio 100:
30:10 ratio dispensing.The granularity of Iron concentrate, anthracite and quick lime is -200 mesh 90%.
Mixture batch mixer mixing 20min.The poly-vinyl alcohol solution of addition 6%, batch mixer mixing 30min, Ran Hou
Pressure ball under 15MPa pressure.Green-ball dries 3h at 110 DEG C.
Microwave carbon thermal reduction, 1000 DEG C of reduction temperature, recovery time 90min are carried out in the track truck of dry bulb load map 1.
After reduction terminates, the movable floor of truck, the N that the metallized pellet of output is discharged into below truck are opened2Storage tank
In be cooled to room temperature, metallized pellet by removable cover enter tank body after fall on buffer board, successively slide afterwards to first plus
Gu wearing plate and second reinforces wearing plate, finally slide to discharge gate and discharge N after cooling2Storage tank obtains cold pelletizing.Cold ball
Group is crushed to after -150 mesh 90% with ball mill, the magnetic separation under 700Oe magnetic field intensity.By analysis, the TFe of gained Magnetic Materials
92%, S 0.013%, meets the quality requirements of steel-making sponge iron.
Embodiment 5
TFe 55% v-ti magnetite tantalite power and fixed carbon are not less than to 75% anthracite, and quick lime is according to matter
Amount compares 100:32:11 ratio dispensing.The granularity of Iron concentrate, anthracite and quick lime is -200 mesh 95%.
Mixture batch mixer mixing 20min.The poly-vinyl alcohol solution of addition 6%, batch mixer mixing 30min, Ran Hou
Pressure ball under 15MPa pressure.Green-ball dries 3h at 110 DEG C.
Microwave carbon thermal reduction, 1050 DEG C of reduction temperature, recovery time are carried out in the track truck of dry bulb load map 1
120min。
After reduction terminates, the movable floor of truck, the N that the metallized pellet of output is discharged into below truck are opened2Storage tank
In be cooled to room temperature, metallized pellet by removable cover enter tank body after fall on buffer board, successively slide afterwards to first plus
Gu wearing plate and second reinforces wearing plate, finally slide to discharge gate and discharge Ar storage tanks after cooling and obtain cold pelletizing.Cold ball
Group is crushed to after -150 mesh 90% with ball mill, the magnetic separation under 600Oe magnetic field intensity.By analysis, the TFe of gained Magnetic Materials
93%, S 0.011%, meets the quality requirements of steel-making sponge iron.
Embodiment 6
TFe 52% v-ti magnetite tantalite power and fixed carbon are not less than to 75% anthracite, and quick lime is according to matter
Amount compares 100:35:10 ratio dispensing.The granularity of Iron concentrate, anthracite and quick lime is -200 mesh 100%.
Mixture batch mixer mixing 20min.The poly-vinyl alcohol solution of addition 6%, batch mixer mixing 30min, Ran Hou
Pressure ball under 15MPa pressure.Green-ball dries 3h at 110 DEG C.
Microwave carbon thermal reduction, 1100 DEG C of reduction temperature, recovery time 90min are carried out in the track truck of dry bulb load map 1.
After reduction terminates, the movable floor of truck, the N that the metallized pellet of output is discharged into below truck are opened2Storage tank
In be cooled to room temperature, metallized pellet by removable cover enter tank body after fall on buffer board, successively slide afterwards to first plus
Gu wearing plate and second reinforces wearing plate, finally slide to discharge gate and discharge Ar storage tanks after cooling and obtain cold pelletizing.Cold ball
Group is crushed to after -150 mesh 90% with ball mill, the magnetic separation under 800Oe magnetic field intensity.By analysis, the TFe of gained Magnetic Materials
92%, S 0.012%, meets the quality requirements of steel-making sponge iron.
The present invention is can be seen that using the reduction of microwave tunnel kiln from above-described embodiment 1-6, is resulted in and is met steel-making requirements
DRI.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of microwave tunnel kiln reduction apparatus, it is characterised in that including the microwave unit that order is set successively, cooling unit,
Ore grinding unit and magnetic separating unit, the microwave unit placement are in orbit；Wherein,
The microwave unit includes truck, the microwave generator being arranged on above truck, the band that can be moved on the track
Move the travel mechanism of the microwave generator and truck movement；
The truck includes being provided with to cover on discharging opening, the discharging opening on support baseboard and compartment, the support baseboard being equipped with
Movable floor；
The microwave unit be one or continuously arrange two and more than.
2. microwave tunnel kiln reduction apparatus according to claim 1, it is characterised in that the cooling unit includes being arranged on
Noble gas storage tank below the track；
The noble gas storage tank, which includes top, to be had the tank body of opening, the removable cover being arranged in opening, is open just positioned at described
The material outlet of lower section, the discharge gate being arranged at material outlet, gas access, noble gas entrance, it is arranged on tank body top
Gas vent, buffer board and the first reinforcing wearing plate for accepting the material slided on buffer board；
The gas access and noble gas entrance are arranged on the side wall of the tank body, and the gas access and noble gas entrance are all provided with
It is set to the mouth of pipe of escape pipe down, the inclined underface for being placed in the opening of the buffer board, described first reinforces wear-resisting
The level height of plate one end is higher than the level height of the other end, and the higher one end of level height is connected to the inwall of noble gas storage tank
On；
The size of the opening is more than the size of the discharging opening.
3. microwave tunnel kiln reduction apparatus according to claim 2, it is characterised in that the noble gas storage tank also includes being used for
The second reinforcing wearing plate that material is slided by the first reinforcing wearing plate is accepted, the second reinforcing wearing plate is snugly arranged on tank
On the tilt internal wall of body bottom.
4. microwave tunnel kiln reduction apparatus according to claim 2, it is characterised in that the microwave unit also includes outer
Cover, measure and control device and the power supply that electric energy is provided for the measure and control device, the outer cover is located at the surface of the truck, described
Microwave generator is placed on the outer cover lower surface, the outer cover and is additionally provided with flue；
The measure and control device connect respectively be also associated with being placed on microwave generator and travel mechanism, the measure and control device it is described
Thermocouple in truck.
5. microwave tunnel kiln reduction apparatus according to claim 4, it is characterised in that beyond the thermometric end of the thermocouple
Part be coated with non-microwave absorbing material.
6. the side of microwave tunnel kiln reduction apparatus reduced iron concentrate described in any claim in a kind of use claim 2-5
Method, it is characterised in that comprise the following steps：
1) it is Iron concentrate, carbonaceous reducing agent and desulphurizer mixing is uniform；
2) by step 1) mixture supplying binding agent carry out pressure ball；
3) by step 2) dry bulb is obtained after the green-ball drying that obtains after pressure ball, and dry bulb is added into microwave tunnel kiln reduction apparatus
In truck, microwave heating is carried out using microwave generator and is reduced directly dry bulb, metallized pellet is obtained；
4) by step 3) obtained metallized pellet grinds choosing after being cooled down in noble gas storage tank, obtains magnetic concentrate.
7. the method for microwave tunnel kiln reduction apparatus reduced iron concentrate as claimed in claim 6, it is characterised in that
Step 1) in, TFe mass percent is the matter of fixed carbon in 52~68%, the carbonaceous reducing agent in the Iron concentrate
Percentage >=75% is measured,
The mass ratio when Iron concentrate, carbonaceous reducing agent and desulfurizing agent batch mixing is 100:25-35：8-12,
The granularity of the Iron concentrate, carbonaceous reducing agent and desulfurizing agent is mass percent >=85% of -200 mesh；
The carbonaceous reducing agent is the one or more in graphite powder, coke, petroleum coke, anthracite；
The desulfurizing agent is the one or more in lime stone, dolomite or quick lime；
The binding agent is one or both of poly-vinyl alcohol solution, starch solution；
Step 2) in, the addition of the binding agent for the Iron concentrate, reducing agent and desulphurizer mixing thing gross mass 5~
10%；
It is 20~40min to be incorporated after binding agent with batch mixer incorporation time；
The pressure of the pressure ball is 12~20MPa；
Step 3) in, the drying temperature is 90~130 DEG C, and drying time is 2~4h；
The microwave frequency of the microwave generator is 300MHz~300kMHz, and microwave tube power is in 15~30kW, the truck
Temperature control is at 900~1100 DEG C, and the insulation reaction time of truck is 60~120min.
8. the method for microwave tunnel kiln reduction apparatus reduced iron concentrate as claimed in claim 6, it is characterised in that step 4) be：
The movable floor of the truck bottom is opened, the metallized pellet after insulation reduction is discharged into noble gas storage tank via the discharging opening
It is middle to be cooled down, it is cooled to the metallized pellet of room temperature and carries out mill choosing after discharge gate discharge.
9. the method for microwave tunnel kiln reduction apparatus reduced iron concentrate as claimed in claim 6, it is characterised in that the noble gas storage
Inert gas used in tank is N2, one or more in Ar.
10. the method for microwave tunnel kiln reduction apparatus reduced iron concentrate as claimed in claim 6, it is characterised in that step 4) in
Mill elect ore grinding first as to mass percent >=85% of the metallized pellet of -150 mesh, then magnetic field intensity 600~
Magnetic separation is carried out under 800Oe and obtains magnetic concentrate and tailings.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736932A (en) * | 2020-05-29 | 2021-12-03 | 宝山钢铁股份有限公司 | Preparation method of carbon-iron composite furnace charge |
| CN115747400A (en) * | 2022-11-28 | 2023-03-07 | 李扬 | Method for producing high-end sponge iron powder from fine iron powder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06116616A (en) * | 1992-08-17 | 1994-04-26 | Dowa Iron Powder Co Ltd | Method and device for producing iron powder utilizing microwave |
| CN2807174Y (en) * | 2005-07-31 | 2006-08-16 | 张廷忻 | Microwave infiltrating and drying tunnel kiln |
| CN101457269A (en) * | 2008-12-30 | 2009-06-17 | 重庆高岭投资（集团）有限公司 | Process for directly producing sponge iron by microwave carbothermal reduction steel metallurgical iron-bearing dust |
| CN103290159A (en) * | 2013-06-06 | 2013-09-11 | 昆明钢铁集团有限责任公司 | Method for producing directly-reduced iron powder in microwave heating manner |
| CN106152778A (en) * | 2015-04-09 | 2016-11-23 | 王人旺 | Microwave high-temperature sintering system |
| CN206986248U (en) * | 2017-05-09 | 2018-02-09 | 江苏省冶金设计院有限公司 | A kind of microwave tunnel kiln reduction apparatus |
-
2017
- 2017-05-09 CN CN201710321882.5A patent/CN107034356A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06116616A (en) * | 1992-08-17 | 1994-04-26 | Dowa Iron Powder Co Ltd | Method and device for producing iron powder utilizing microwave |
| CN2807174Y (en) * | 2005-07-31 | 2006-08-16 | 张廷忻 | Microwave infiltrating and drying tunnel kiln |
| CN101457269A (en) * | 2008-12-30 | 2009-06-17 | 重庆高岭投资（集团）有限公司 | Process for directly producing sponge iron by microwave carbothermal reduction steel metallurgical iron-bearing dust |
| CN103290159A (en) * | 2013-06-06 | 2013-09-11 | 昆明钢铁集团有限责任公司 | Method for producing directly-reduced iron powder in microwave heating manner |
| CN106152778A (en) * | 2015-04-09 | 2016-11-23 | 王人旺 | Microwave high-temperature sintering system |
| CN206986248U (en) * | 2017-05-09 | 2018-02-09 | 江苏省冶金设计院有限公司 | A kind of microwave tunnel kiln reduction apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736932A (en) * | 2020-05-29 | 2021-12-03 | 宝山钢铁股份有限公司 | Preparation method of carbon-iron composite furnace charge |
| CN115747400A (en) * | 2022-11-28 | 2023-03-07 | 李扬 | Method for producing high-end sponge iron powder from fine iron powder |
| CN115747400B (en) * | 2022-11-28 | 2024-03-12 | 李扬 | Method for producing high-end sponge iron powder from fine iron powder |
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