CN102628646B - Oxidation reduction furnace and method for treating waste remained after dust-removal of iron and steel enterprises - Google Patents
Oxidation reduction furnace and method for treating waste remained after dust-removal of iron and steel enterprises Download PDFInfo
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- CN102628646B CN102628646B CN201210101150.2A CN201210101150A CN102628646B CN 102628646 B CN102628646 B CN 102628646B CN 201210101150 A CN201210101150 A CN 201210101150A CN 102628646 B CN102628646 B CN 102628646B
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- 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
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Abstract
The invention discloses an oxidation reduction furnace and a method for treating waste remained after dust-removal of iron and steel enterprises. The oxidation reduction furnace comprises a feeding hopper, an inner wall, an outer wall, a flue, a furnace chamber, a burning chamber, a gas nozzle, a gas passage, a gas electromagnetic heater, a discharging hopper, a discharging device and a gas outlet. The method for treating the waste remained after dust-removal of the iron and steel enterprises is characterized that the waste remained after dust-removal is pelletized and placed into the oxidation reduction furnace and heated to 1100 to 1250 DEG C, and the gas is introduced into the oxidation reduction furnace so as to complete the reduction and the oxidation in one step. The invention has advantages that: 1, the oxidation-reduction reaction is completed in one furnace; 2, the waste is in contact with the gas at the high temperature, so that the differentiation problem at a low temperature can be solved; 3, the gas electromagnetic heater is used for heating the gas to a given temperature, so that the temperature balance inside the furnace can be ensured; 4, the discharging device is utilized to ensure uniform discharging; and 5, the height of the burning chamber is increased, and the temperature of a reduction interval is increased, so that the reduction is carried out more adequately.
Description
(1) technical field:
The present invention relates to field of metallurgical equipment, particularly a kind of resource of the dedusting discarded object that utilizes iron and steel enterprise is produced redox stove and the method for work thereof of the nonferrous metal oxides such as iron fine powder, zinc oxide, lead oxide, silver oxide and potassium chloride, magnesium chloride, sodium chloride.
(2) background technology:
The dedusting discarded object of iron and steel enterprise has the characteristic that grade is low, be oxidized object height, so general kiln can't resolve in process of production, balling-up intensity is low, sintering process is lumpd, the problem of low temperature efflorescence, in no small enterprise of large enterprises, use all the time, the situation that the have more than is needed fraud of small enterprise is used, directly entering sintering reclaims a small amount of iron wherein without exception, so not only environment is caused pollution for a long time, repeatedly but also wastes resource and the energy.
The method of the current existing dedusting discarded object that reclaims iron and steel enterprise has following three kinds:
1, rotary kiln production oxide belongs to oxidizing atmosphere, cooling system is oversize, heat loss is excessive, consume energy high, in residue slag, the content of zinc is 2%-4%, and the content of fixed carbon is 25%-30%, ferrous content nearly 30%, and the defect that has caking and stifled stove, the raw material using has significant limitation.
2, open hearth is produced oxide and is belonged to oxidizing atmosphere, and cooling system is oversize, and heat loss is excessive, consume energy high, and the oxide content 2%-4% of residue in slag, the content of fixed carbon is 10% left and right, ferrous content nearly 50%, cannot recycle substantially, all goes out of use.
3, some extracts alkali-metal method, although can extract a part of alkali metal, but the method technique is long, energy consumption is high, in solids after extraction, contain equally alkali metal, metal oxide does not extract at all, returning to like this sintering and pollute equally, increase energy consumption, is endless cyclic polluting.
(3) summary of the invention:
The object of the present invention is to provide the method for the dedusting discarded object of a kind of redox stove and processing iron and steel enterprise, this method is by the dedusting ash of iron and steel enterprise, to carry out the mixture pelletizing rear oxidation of heating to reduce a step and complete, and then substep obtains the method for iron fine powder, zinc oxide, lead oxide, silver oxide, potassium chloride, sodium chloride.Not only alleviate the present situation of china natural resources shortage, reduced again the pollution to environment, reduced smelting cost.
A kind of redox stove, is characterized in that it is by material bin, stove inwall, furnace outer wall, flue, furnace chamber, combustion chamber, gas jet, gas passage, coal gas electromagnetic heater, hopper, blanking device and gas export mixes; Said material bin is positioned at the top of redox stove; Said flue is that stove inwall is with interior space; Said furnace chamber is the overall space between stove inwall and furnace outer wall, according to when work temperature difference be divided into that preheating oxidation is interval from top to bottom, between reducing zone, between coal gas band, cooling zone and between discharge zone; Said combustion chamber is positioned at the sidepiece of redox stove, is fixedly connected with furnace outer wall; Said gas jet is fixed on combustion chamber; Said coal gas electromagnetic heater is communicated with the coal gas band in furnace chamber according to gas passage; Said hopper is positioned at furnace chamber bottom, stretches out; Said blanking device is fixed on furnace outer wall bottom, joins with hopper, and it consists of impeller, reductor and motor, and said impeller, reductor and motor are connected according to transmission device from inside to outside; Said gas vent is positioned at redox furnace bottom; Wherein, the height of said combustion chamber is 0.8-1.5 rice, and said impeller is 6 grooves or 8 grooves.
Above-mentioned said material bin by the minor face of fixing and movably long limit form.
Above-mentioned said transmission device is connecting axle and connecting bushing.
It is 1.2-1.8 rice that above-mentioned said preheating is oxidized interval height, and the height between said reducing zone is 2-3 rice, and the height of said coal gas band is 0.2-0.3 rice, and the height between said cooling zone is 2-3 rice, and the height between said discharge zone is 1.5-2 rice.
A method of processing the dedusting discarded object of iron and steel enterprise, is characterized in that comprising the following steps:
(1) by gas jet, passed into the mist of coal gas and air, ignition, the temperature of combustion chamber is 900-1250 ℃, the negative pressure pressure in flue is 400-800 handkerchief;
(2) the dedusting discarded object after mixture pelletizing is dropped into material bin;
(3) due to Action of Gravity Field, dedusting discarded object falls into the preheating oxidation interval of furnace chamber, and temperature is heated to 900-1250 ℃ by 100-300 ℃, and the mist of generation is discharged by furnace chamber, flue, gas vent successively, and dedusting discarded object continues to fall;
(4) dedusting discarded object enters between reducing zone, and temperature is down to 400-1100 ℃ by 900-1250 ℃, and the gas mixture body of generation is discharged by furnace chamber, flue, gas vent successively, and dedusting discarded object continues to fall;
(5) pass into coal gas band after scrubbed gas is heated to 400-1100 ℃ by coal gas electromagnetic heater and send into furnace chamber, dedusting discarded object enters coal gas band, temperature remains unchanged, its temperature determines degree of metalization, the higher degree of metalization of temperature is higher, the protocorm of going back generating continues to fall, and the mist of generation is discharged by furnace chamber, flue, gas vent successively;
(6) go back protocorm and enter between cooling zone, temperature is down to 200-400 ℃ by 400-1100 ℃
(7) go back protocorm and continue to fall to entering between discharge zone, temperature is down to 150-300 ℃;
(8) go back protocorm and fall into hopper, rely on Action of Gravity Field to enter impeller, said impeller is 6 grooves or 8 grooves, and the weight of going back protocorm in every groove is 0.5-1kg.
(9) mist of going back protocorm and discharging from gas vent of discharging from impeller is collected standby.
Between above-mentioned said cooling zone, rely on water quench cooling.
The above-mentioned said content of iron fine powder in protocorm of going back improves 30-45% than the content in dedusting discarded object.
The above-mentioned said content of going back every kind of oxide in protocorm is all less than 0.01%.
In above-mentioned said mist, the content of potassium chloride is 30-50%, the content of sodium chloride is 5-9%, and the content of zinc oxide is 13-45%, and the content of lead oxide is 15-23%, the content of silver oxide is 0.02-0.04%, and all the other are the unavailable materials such as calcium oxide, silica.
Superiority of the present invention: 1, redox reaction completes in a stove; 2, discarded object, at high temperature place (1100-1250 ℃) contact coal gas, has solved the problem of low temperature differentiation; 3, use coal gas electromagnetic heater that heated by gas is arrived to uniform temperature, can guarantee the balance of temperature in stove; 4, use the blanking device being formed by impeller, reductor, motor, connecting axle and connecting bushing, can guarantee even blanking, reduce collision and the friction of stove endosphere, avoid damaged and caking; 5, improved the height of combustion chamber, increased the temperature between reducing zone, reduced more abundant.
(4) accompanying drawing explanation:
Fig. 1 is the internal structure schematic diagram of the related a kind of redox stove of the present invention.
Fig. 2 is the structural representation of the blanking device in the related a kind of redox stove of the present invention.
Wherein, 1 is material bin, and 2 is furnace chamber, and 3 is gas jet, 4 is combustion chamber, and 5 is gas passage, and 6 is coal gas Electromagnetic Heating gas, and 7 is hopper, 8 is blanking device, and 9 is flue, and 10 is gas vent, and 11 is stove inwall, 12 is furnace outer wall, and 2-1 is that preheating oxidation is interval, and 2-2 is between reducing zone, and 2-3 is coal gas band, 2-4 is between cooling zone, and 2-5 is between discharge zone, and 8-1 is connecting bushing, and 8-2 is connecting axle, 8-3 is impeller, 8-4 reductor, and 8-5 is motor.
(5) specific embodiment
Embodiment 1: a kind of redox stove (seeing Fig. 1-2), is characterized in that it consists of material bin 1, stove inwall 11, furnace outer wall 12, flue 9, furnace chamber 2, combustion chamber 4, gas jet 3, gas passage 5, coal gas electromagnetic heater 6, hopper 7, blanking device 8 and gas vent 10; Said material bin 1 is positioned at the top of redox stove; Said flue 9 is that stove inwall 11 is with interior space; Said furnace chamber 2 is the overall space between stove inwall 11 and furnace outer wall 12, and according to when work, the difference of temperature is divided into preheating from top to bottom and is oxidized between 2-2 between interval 2-1, reducing zone, coal gas band 2-3, cooling zone 2-5 between 2-4 and discharge zone; Said combustion chamber 4 is positioned at the sidepiece of redox stove, is fixedly connected with furnace outer wall 12; Said gas jet 3 is fixed on combustion chamber 4; Said coal gas electromagnetic heater 6 is communicated with the coal gas band 2-3 in furnace chamber 2 according to gas passage 5; Said hopper 7 is positioned at furnace chamber 2 bottoms, stretches out; Said blanking device 8 is fixed on furnace outer wall 12 bottoms, joins with hopper 7, and it consists of impeller 8-3, reductor 8-4 and motor 8-5, and said impeller 8-3, reductor 8-4 are connected with connecting bushing 8-1 according to connecting axle 8-2 from inside to outside with motor 8-5; Said gas vent 10 is positioned at redox furnace bottom; Wherein, the height of said combustion chamber 4 is 0.8 meter, and said impeller 8-3 is 6 grooves.
Above-mentioned said material bin 1 by the minor face of fixing and movably long limit form.
The height that above-mentioned said preheating is oxidized interval 2-1 is 1.2 meters, and between said reducing zone, the height of 2-2 is 2 meters, and the height of said coal gas band 2-3 is 0.2 meter, and between said cooling zone, the height of 2-4 is 2 meters, and between said discharge zone, the height of 2-5 is 1.5 meters.
A method of processing the dedusting discarded object of iron and steel enterprise, is characterized in that comprising the following steps:
(1) by gas jet 3, passed into the mist of coal gas and air, ignition, the temperature of combustion chamber 4 is 900 ℃, the negative pressure pressure in flue 9 is 400 handkerchiefs;
(2) the dedusting discarded object after mixture pelletizing is dropped into material bin 1;
(3) due to Action of Gravity Field, the preheating that dedusting discarded object falls into furnace chamber is oxidized interval 2-1, and temperature is heated to 900 ℃ by 100 ℃, and the mist of generation is discharged by furnace chamber 2, flue 9, gas vent 10 successively, and dedusting discarded object continues to fall;
(4) dedusting discarded object enters 2-2 between reducing zone, and temperature is down to 400 ℃ by 900 ℃, and the gas mixture body of generation is discharged by furnace chamber 2, flue 9, gas vent 10 successively, and dedusting discarded object continues to fall;
(5) pass into coal gas band 2-3 after scrubbed gas is heated to 400 ℃ by coal gas electromagnetic heater 6 and send into furnace chamber 2, dedusting discarded object enters coal gas band 2-3, temperature remains unchanged, its temperature determines degree of metalization, the higher degree of metalization of temperature is higher, the protocorm of going back generating continues to fall, and the mist of generation is discharged by furnace chamber 2, flue 9, gas vent 10 successively;
(6) go back protocorm and enter 2-4 between cooling zone, temperature is down to 200 ℃ by 400 ℃
(7) go back protocorm and continue to fall to entering 2-5 between discharge zone, temperature is down to 150 ℃;
(8) go back protocorm and fall into hopper 7, rely on Action of Gravity Field to enter impeller 8-3, said impeller 8-3 is 6 grooves, and the weight of going back protocorm in every groove is 0.5kg.
(9) mist of going back protocorm and discharging from gas vent 10 of discharging from impeller 8-3 is collected standby.
Between above-mentioned said cooling zone, 2-4 relies on water quench cooling.
In above-mentioned said dedusting discarded object, the content of full iron is 34.91%, the content of zinc oxide is 1.47%, the content of lead oxide is 1.33%, the content of silver oxide is 0.00437%, the content of potassium oxide is 4.56%, the content of sodium oxide molybdena is 0.85%, and magnesian content is 1.78%, and all the other are the unavailable materials such as calcium oxide, silica.
The above-mentioned said content of going back iron fine powder in protocorm is 51.05%, the content of lead oxide is 0.004%, the content of zinc oxide is 0.004%, the content of potassium oxide is 0.004%, the content of sodium oxide molybdena is 0.01%, the content of silver oxide is 0.0021%, and all the other are the unavailable materials such as calcium oxide, silica.
In above-mentioned said mist, the content of potassium chloride is 30%, and the content of sodium chloride is 5%, and the content of zinc oxide is 13%, and the content of lead oxide is 15%, and the content of silver oxide is 0.02%, and all the other are the unavailable materials such as calcium oxide, silica.
Embodiment 2: a kind of redox stove, is characterized in that it consists of material bin 1, stove inwall 11, furnace outer wall 12, flue 9, furnace chamber 2, combustion chamber 4, gas jet 3, gas passage 5, coal gas electromagnetic heater 6, hopper 7, blanking device 8 and gas vent 10; Said material bin 1 is positioned at the top of redox stove; Said flue 9 is that stove inwall 11 is with interior space; Said furnace chamber 2 is the overall space between stove inwall 11 and furnace outer wall 12, and according to when work, the difference of temperature is divided into preheating from top to bottom and is oxidized between 2-2 between interval 2-1, reducing zone, coal gas band 2-3, cooling zone 2-5 between 2-4 and discharge zone; Said combustion chamber 4 is positioned at the sidepiece of redox stove, is fixedly connected with furnace outer wall 12; Said gas jet 3 is fixed on combustion chamber 4; Said coal gas electromagnetic heater 6 is communicated with the coal gas band 2-3 in furnace chamber 2 according to gas passage 5; Said hopper 7 is positioned at furnace chamber 2 bottoms, stretches out; Said blanking device 8 is fixed on furnace outer wall 12 bottoms, joins with hopper 7, and it consists of impeller 8-3, reductor 8-4 and motor 8-5, and said impeller 8-3, reductor 8-4 are connected with connecting bushing 8-1 according to connecting axle 8-2 from inside to outside with motor 8-5; Said gas vent 10 is positioned at redox furnace bottom; Wherein, the height of said combustion chamber 4 is 1.5 meters, and said impeller 8-3 is 8 grooves.
Above-mentioned said material bin 1 by the minor face of fixing and movably long limit form.
The height that above-mentioned said preheating is oxidized interval 2-1 is 1.8 meters, and between said reducing zone, the height of 2-2 is 3 meters, and the height of said coal gas band 2-3 is 0.3 meter, and between said cooling zone, the height of 2-4 is 3 meters, and between said discharge zone, the height of 2-5 is 2 meters.
A method of processing the dedusting discarded object of iron and steel enterprise, is characterized in that comprising the following steps:
(1) by gas jet 3, passed into the mist of coal gas and air, ignition, the temperature of combustion chamber 4 is 1250 ℃, the negative pressure pressure in flue 9 is 800 handkerchiefs;
(2) the dedusting discarded object after mixture pelletizing is dropped into material bin 1;
(3) due to Action of Gravity Field, the preheating that dedusting discarded object falls into furnace chamber is oxidized interval 2-1, and temperature is heated to 1250 ℃ by 300 ℃, and the mist of generation is discharged by furnace chamber 2, flue 9, gas vent 10 successively, and dedusting discarded object continues to fall;
(4) dedusting discarded object enters 2-2 between reducing zone, and temperature is down to 1100 ℃ by 1250 ℃, and the gas mixture body of generation is discharged by furnace chamber 2, flue 9, gas vent 10 successively, and dedusting discarded object continues to fall;
(5) pass into coal gas 2-3 band after scrubbed gas is heated to 1100 ℃ by coal gas electromagnetic heater 6 and send into furnace chamber 2, dedusting discarded object enters coal gas band 2-3, temperature remains unchanged, its temperature determines degree of metalization, the higher degree of metalization of temperature is higher, the protocorm of going back generating continues to fall, and the mist of generation is discharged by furnace chamber 2, flue 9, gas vent 10 successively;
(6) go back protocorm and enter 2-4 between cooling zone, temperature is down to 400 ℃ by 1100 ℃
(7) go back protocorm and continue to fall to entering 2-5 between discharge zone, temperature is down to 300 ℃;
(8) go back protocorm and fall into hopper 7, rely on Action of Gravity Field to enter impeller 8-3, said impeller 8-3 is 8 grooves, and the weight of going back protocorm in every groove is 1kg.
(9) mist of going back protocorm and discharging from gas vent 10 of discharging from impeller 8-3 is collected standby.
Between above-mentioned said cooling zone, 2-4 relies on water quench cooling.
In above-mentioned said dedusting discarded object, the content of full iron is 45.36%, the content of zinc oxide is 1.34%, the content of lead oxide is 1.25%, the content of silver oxide is 0.0041%, the content of potassium oxide is 3.28%, the content of sodium oxide molybdena is 0.92%, and magnesian content is 2.05%, and all the other are the unavailable materials such as calcium oxide, silica.
The above-mentioned said content of going back iron fine powder in protocorm is 59.23%, the content of lead oxide is 0.002%, the content of zinc oxide is 0.002%, the content of potassium oxide is 0.002%, the content of sodium oxide molybdena is 0.005%, the content of silver oxide is 0.0018%, and all the other are the unavailable materials such as calcium oxide, silica.
In above-mentioned said mist, the content of potassium chloride is 50%, and the content of sodium chloride is 9%, and the content of zinc oxide is 25%, and the content of lead oxide is 15%, and the content of silver oxide is 0.04%, and all the other are the unavailable materials such as calcium oxide, silica.
Embodiment 3:
A kind of redox stove, is characterized in that it consists of material bin 1, stove inwall 11, furnace outer wall 12, flue 9, furnace chamber 2, combustion chamber 4, gas jet 3, gas passage 5, coal gas electromagnetic heater 6, hopper 7, blanking device 8 and gas vent 10; Said material bin 1 is positioned at the top of redox stove; Said flue 9 is that stove inwall 11 is with interior space; Said furnace chamber 2 is the overall space between stove inwall 11 and furnace outer wall 12, and according to when work, the difference of temperature is divided into preheating from top to bottom and is oxidized between 2-2 between interval 2-1, reducing zone, coal gas band 2-3, cooling zone 2-5 between 2-4 and discharge zone; Said combustion chamber 4 is positioned at the sidepiece of redox stove, is fixedly connected with furnace outer wall 12; Said gas jet 3 is fixed on combustion chamber 4; Said coal gas electromagnetic heater 6 is communicated with 2 coal gas band 2-3 in furnace chamber according to gas passage 5; Said hopper 7 is positioned at furnace chamber 2 bottoms, stretches out; Said blanking device 8 is fixed on furnace outer wall 12 bottoms, joins with hopper 7, and it consists of impeller 8-3, reductor 8-4 and motor 8-5, and said impeller 8-3, reductor 8-4 are connected with connecting bushing 8-1 according to connecting axle 8-2 from inside to outside with motor 8-5; Said gas vent 10 is positioned at redox furnace bottom; Wherein, the height of said combustion chamber 4 is 0.8-1.5 rice, and said impeller 8-3 is 6 grooves.
Above-mentioned said material bin 1 by the minor face of fixing and movably long limit form.
Height between above-mentioned said preheating zoneofoxidation 2-1 is 1.6 meters, between said reducing zone, the height of 2-2 is 2.5 meters, the height of said coal gas band 2-3 is 0.25 meter, and between said cooling zone, the height of 2-4 is 2.5 meters, and between said discharge zone, the height of 2-5 is 1.8 meters.
A method of processing the dedusting discarded object of iron and steel enterprise, is characterized in that comprising the following steps:
(1) by gas jet 3, passed into the mist of coal gas and air, ignition, the temperature of combustion chamber 4 is 1000 ℃, the negative pressure pressure in flue 9 is 600 handkerchiefs;
(2) the dedusting discarded object after mixture pelletizing is dropped into material bin 1;
(3) due to Action of Gravity Field, the preheating that dedusting discarded object falls into furnace chamber 2 is oxidized interval 2-1, and temperature is heated to 1000 ℃ by 200 ℃, and the mist of generation is discharged by furnace chamber 2, flue 9, gas vent 10 successively, and dedusting discarded object continues to fall;
(4) dedusting discarded object enters 2-2 between reducing zone, and temperature is down to 800 ℃ by 1000 ℃, and the gas mixture body of generation is discharged by furnace chamber 2, flue 9, gas vent 10 successively, and dedusting discarded object continues to fall;
(5) pass into coal gas band 2-3 after scrubbed gas is heated to 800 ℃ by coal gas electromagnetic heater 6 and send into furnace chamber 2, dedusting discarded object enters coal gas band 2-3, temperature remains unchanged, its temperature determines degree of metalization, the higher degree of metalization of temperature is higher, the protocorm of going back generating continues to fall, and the mist of generation is discharged by furnace chamber 2, flue 9, gas vent 10 successively;
(6) go back protocorm and enter 2-4 between cooling zone, temperature is down to 300 ℃ by 800 ℃
(7) go back protocorm and continue to fall to entering 2-5 between discharge zone, temperature is down to 250 ℃;
(8) go back protocorm and fall into hopper 7, rely on Action of Gravity Field to enter impeller 8-3, said impeller 8-3 is 6 grooves, and the weight of going back protocorm in every groove is 0.8kg.
(9) mist of going back protocorm and discharging from gas vent 10 of discharging from impeller 8-3 is collected standby.
Between above-mentioned said cooling zone, rely on water quench cooling.
In above-mentioned said dedusting discarded object, the content of full iron is 40%, the content of zinc oxide is 1.4%, the content of lead oxide is 1.3%, the content of silver oxide is 0.0042%, the content of potassium oxide is 4%, the content of sodium oxide molybdena is 0.9%, and magnesian content is 2%, and all the other are the unavailable materials such as calcium oxide, silica.
The above-mentioned said content of going back iron fine powder in protocorm is 53%, and the content of lead oxide is 0.003%, and the content of zinc oxide is 0.003%, and the content of potassium oxide is 0.003%, and the content of sodium oxide molybdena is 0.008%, and the content of silver oxide is 0.002%.
In above-mentioned said mist, the content of potassium chloride is 30%, and the content of sodium chloride is 6%, and the content of zinc oxide is 40%, and the content of lead oxide is 23%, and the content of silver oxide is 0.02%, and all the other are the unavailable materials such as calcium oxide, silica.
Claims (8)
1. a redox stove, is characterized in that it is by material bin, stove inwall, furnace outer wall, flue, furnace chamber, combustion chamber, gas jet, gas passage, coal gas electromagnetic heater, hopper, blanking device and gas export mixes; Said material bin is positioned at the top of redox stove; Said flue is that stove inwall is with interior space; Said furnace chamber is the overall space between stove inwall and furnace outer wall, according to when work temperature difference be divided into that preheating oxidation is interval from top to bottom, between reducing zone, between coal gas band, cooling zone and between discharge zone; Said combustion chamber is positioned at the sidepiece of redox stove, is fixedly connected with furnace outer wall; Said gas jet is fixed on combustion chamber; Said coal gas electromagnetic heater is communicated with the coal gas band in furnace chamber according to gas passage; Said hopper is positioned at furnace chamber bottom, stretches out; Said blanking device is fixed on furnace outer wall bottom, joins with hopper, and it consists of impeller, reductor and motor, and said impeller, reductor and motor are connected according to transmission device from inside to outside; Said gas vent is positioned at redox furnace bottom; Wherein, the height of said combustion chamber is 0.8-1.5 rice, and said impeller is 6 grooves or 8 grooves.
2. according to the said a kind of redox stove of claim 1, it is characterized in that said material bin by the minor face of fixing and movably grow limit forming.
3. according to the said a kind of redox stove of claim 1, it is characterized in that said transmission device is connecting axle and connecting bushing.
4. according to the said a kind of redox stove of claim 1, it is characterized in that it is 1.2-1.8 rice that said preheating is oxidized interval height, height between said reducing zone is 2-3 rice, the height of said coal gas band is 0.2-0.3 rice, height between said cooling zone is 2-3 rice, and the height between said discharge zone is 1.5-2 rice.
5. process a method for the dedusting discarded object of iron and steel enterprise, it is characterized in that concrete steps are as follows:
(1) by gas jet, passed into the mist of coal gas and air, ignition, the temperature of combustion chamber is 900-1250 ℃, the negative pressure pressure in flue is 400-800 handkerchief;
(2) the dedusting discarded object after mixture pelletizing is dropped into material bin;
(3) due to Action of Gravity Field, dedusting discarded object falls into the preheating oxidation interval of furnace chamber, and temperature is heated to 900-1250 ℃ by 100-300 ℃, and the mist of generation is discharged by furnace chamber, flue, gas vent successively, and dedusting discarded object continues to fall;
(4) dedusting discarded object enters between reducing zone, and temperature is down to 400-1100 ℃ by 900-1250 ℃, and the gas mixture body of generation is discharged by furnace chamber, flue, gas vent successively, and dedusting discarded object continues to fall;
(5) pass into coal gas band after scrubbed gas is heated to 400-1100 ℃ by coal gas electromagnetic heater and send into furnace chamber, dedusting discarded object enters coal gas band, temperature remains unchanged, its temperature determines degree of metalization, the higher degree of metalization of temperature is higher, the protocorm of going back generating continues to fall, and the mist of generation is discharged by furnace chamber, flue, gas vent successively;
(6) go back protocorm and enter between cooling zone, temperature is down to 200-400 ℃ by 400-1100 ℃;
(7) go back protocorm and continue to fall to entering between discharge zone, temperature is down to 150-300 ℃;
(8) go back protocorm and fall into hopper, rely on Action of Gravity Field to enter impeller, said impeller is 6 grooves or 8 grooves, and the weight of going back protocorm in every groove is 0.5-1kg;
(9) mist of going back protocorm and discharging from gas vent of discharging from impeller is collected standby.
6. according to the method for the said a kind of dedusting discarded object of processing iron and steel enterprise of claim 5, it is characterized in that relying on water quench to lower the temperature between said cooling zone.
7. according to the method for the said a kind of dedusting discarded object of processing iron and steel enterprise of claim 5, it is characterized in that the said content of iron fine powder in protocorm of going back improves 30-45% than the content in dedusting discarded object.
8. according to the method for the said a kind of dedusting discarded object of processing iron and steel enterprise of claim 5, it is characterized in that the said content of going back every kind of oxide in protocorm is all less than 0.01%.
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| CN1041441A (en) * | 1988-09-21 | 1990-04-18 | 龙怀安 | Verticle furnace of kiln |
| CN1071749A (en) * | 1992-08-15 | 1993-05-05 | 海南攀宝建材工业有限公司 | The annealing device of bulk or granular material |
| CN102230726A (en) * | 2011-06-10 | 2011-11-02 | 河南省德耀机械制造有限公司 | Sleeve type continuous calcining vertical kiln |
| CN202595231U (en) * | 2012-03-31 | 2012-12-12 | 天津浩强冶金材料有限公司 | Oxidation-reduction furnace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009161390A (en) * | 2008-01-04 | 2009-07-23 | Aienji:Kk | Structure of laterally-flowing type lime kiln |
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2012
- 2012-03-31 CN CN201210101150.2A patent/CN102628646B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041441A (en) * | 1988-09-21 | 1990-04-18 | 龙怀安 | Verticle furnace of kiln |
| CN1071749A (en) * | 1992-08-15 | 1993-05-05 | 海南攀宝建材工业有限公司 | The annealing device of bulk or granular material |
| CN102230726A (en) * | 2011-06-10 | 2011-11-02 | 河南省德耀机械制造有限公司 | Sleeve type continuous calcining vertical kiln |
| CN202595231U (en) * | 2012-03-31 | 2012-12-12 | 天津浩强冶金材料有限公司 | Oxidation-reduction furnace |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2009-161390A 2009.07.23 |
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