CN102628646A - 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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- CN102628646A CN102628646A CN2012101011502A CN201210101150A CN102628646A CN 102628646 A CN102628646 A CN 102628646A CN 2012101011502 A CN2012101011502 A CN 2012101011502A CN 201210101150 A CN201210101150 A CN 201210101150A CN 102628646 A CN102628646 A CN 102628646A
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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 the redox stove and the method for work thereof of nonferrous metal oxides such as the smart powder of iron, 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 that grade is low, the characteristic of oxidation object height; Balling-up intensity is low, sintering process is lumpd so general kiln can't resolve in process of production, the problem of low temperature efflorescence; Be in no small enterprise of large enterprises uses all the time; The situation that the have more than is needed fraud of small enterprise is used directly gets into sintering recovery small amounts of iron wherein without exception, so not only to environment cause for a long time, repeatedly pollution but also waste resource and the energy.
The present existing method that reclaims the dedusting discarded object of iron and steel enterprise has following three kinds:
1, rotary kiln production oxide belongs to oxidizing atmosphere, and cooling system is oversize, and heat loss is excessive; Power consumption is high; The content of zinc is 2%-4% in the residue slag, and the content of fixed carbon is 25%-30%, ferrous content nearly 30%; And have the defective of caking and stifled stove, employed raw material 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, and power consumption is high, the oxide content 2%-4% in the residue slag, and the content of fixed carbon is about 10%, ferrous content nearly 50% can't utilize basically again, all goes out of use.
3, some extracts alkali-metal method; Though can extract a part of alkali metal; But this method technology is long, energy consumption is high, contains alkali metal in the solids after the extraction equally, and metal oxide does not extract at all; Returning sintering like this and pollute, increase energy consumption equally, 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 that the dedusting ash with iron and steel enterprise is mixed and makes ball one step of rear oxidation reduction of heating and accomplish, and substep obtains the method for the smart powder of iron, zinc oxide, lead oxide, silver oxide, potassium chloride, sodium chloride then.Not only alleviate the present situation of china natural resources shortage, reduced pollution again, reduced smelting cost environment.
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 the stove inwall is with interior space; Said furnace chamber is the overall space between stove inwall and the furnace outer wall, according to when work temperature difference be divided into from top to bottom that the preheating oxidation is interval, between the 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 the combustion chamber; Said coal gas electromagnetic heater is communicated with coal gas band in the furnace chamber according to gas passage; Said hopper is positioned at the furnace chamber bottom, stretches out; Said blanking device is fixed in the furnace outer wall bottom, joins with hopper, and it is made up 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 the redox furnace bottom; Wherein, the height of said combustion chamber is a 0.8-1.5 rice, and said impeller is 6 grooves or 8 grooves.
Above-mentioned said material bin is made up of fixing minor face and movably long limit.
Above-mentioned said transmission device is connecting axle and connecting bushing.
The interval height of above-mentioned said preheating oxidation is a 1.2-1.8 rice, and the height between said reducing zone is a 2-3 rice, and the height of said coal gas band is a 0.2-0.3 rice, and the height between said cooling zone is a 2-3 rice, and the height between said discharge zone is a 1.5-2 rice.
A kind of method of handling the dedusting discarded object of iron and steel enterprise is characterized in that may further comprise the steps:
(1) feed coal gas and Air mixing gas by gas jet, ignition, the temperature of combustion chamber is 900-1250 ℃, the negative pressure pressure in the flue is the 400-800 handkerchief;
(2) the dedusting discarded object of making behind the ball that will be mixed drops into material bin;
(3) owing to the gravity effect, the 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 through furnace chamber, flue, gas vent successively, and the dedusting discarded object continues the whereabouts;
(4) the dedusting discarded object gets between the reducing zone, and temperature is reduced to 400-1100 ℃ by 900-1250 ℃, and the gas mixture body of generation is discharged through furnace chamber, flue, gas vent successively, and the dedusting discarded object continues to fall;
(5) feed the coal gas band after scrubbed gas is heated to 400-1100 ℃ through the coal gas electromagnetic heater and send into furnace chamber; The dedusting discarded object gets into the coal gas band; Temperature remains unchanged, its temperature decision degree of metalization, and the high more then degree of metalization of temperature is high more; The protocorm of going back that generates continues to fall, and the mist of generation is discharged through furnace chamber, flue, gas vent successively;
(6) go back protocorm and get between the cooling zone, temperature is reduced to 200-400 ℃ by 400-1100 ℃
(7) go back protocorm and continue to fall to getting between discharge zone, temperature is reduced to 150-300 ℃;
(8) go back protocorm and fall into hopper, rely on the gravity effect to get into impeller, said impeller is 6 grooves or 8 grooves, and the weight of going back protocorm in every groove is 0.5-1kg.
(9) will go back protocorm and collect subsequent use from what impeller was discharged from the mist that gas vent is discharged.
Rely on the water quench cooling between above-mentioned said cooling zone.
The above-mentioned said content of going back the smart powder of iron in the protocorm improves 30-45% than the content in the dedusting discarded object.
The above-mentioned said content of going back every kind of oxide in the protocorm is all less than 0.01%.
The content of potassium chloride is 30-50% in the above-mentioned said mist; 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 unavailable materials such as calcium oxide, silica.
Superiority of the present invention: 1, redox reaction is accomplished in a stove; 2, (1100-1250 ℃) contacts coal gas to discarded object at the high temperature place, solved the problem of low temperature differentiation; 3, use the coal gas electromagnetic heater to be heated to uniform temperature to coal gas, can guarantee the balance of temperature in the stove; 4, use the blanking device that constitutes by impeller, reductor, motor, connecting axle and connecting bushing, can guarantee even blanking, reduce the collision and the friction of stove endosphere, avoid damaged and caking; 5, improved the height of combustion chamber, increased the temperature between the reducing zone, reduced more abundant.
(4) description of drawings:
Fig. 1 is the internal structure sketch map 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, and 4 is the combustion chamber, and 5 is gas passage; 6 is coal gas electromagnetism heat air, and 7 is hopper, and 8 is blanking device, and 9 is flue, and 10 is gas vent, and 11 is the stove inwall; 12 is furnace outer wall, and 2-1 is that the preheating oxidation is interval, and 2-2 is between the reducing zone, and 2-3 is the coal gas band, and 2-4 is between the cooling zone, and 2-5 is between discharge zone; 8-1 is a connecting bushing, and 8-2 is a connecting axle, and 8-3 is an impeller, and 8-4 reductor, 8-5 are motor.
(5) specific embodiment
Embodiment 1: a kind of redox stove (seeing Fig. 1-2) is characterized in that it is made up 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 the furnace outer wall 12, and the difference of temperature is divided between the interval 2-1 of preheating oxidation, reducing zone between 2-2, coal gas band 2-3, cooling zone 2-5 between 2-4 and discharge zone from top to bottom according to when work; 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 the combustion chamber 4; Said coal gas electromagnetic heater 6 is communicated with coal gas band 2-3 in the 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 in furnace outer wall 12 bottoms, joins with hopper 7, and it is made up of impeller 8-3, reductor 8-4 and motor 8-5, and said impeller 8-3, reductor 8-4 and motor 8-5 are connected with connecting bushing 8-1 according to connecting axle 8-2 from inside to outside; Said gas vent 10 is positioned at the 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 is made up of fixing minor face and movably long limit.
The height of the interval 2-1 of above-mentioned said preheating oxidation is 1.2 meters, and the height of 2-2 is 2 meters between said reducing zone, and the height of said coal gas band 2-3 is 0.2 meter, and the height of 2-4 is 2 meters between said cooling zone, and the height of 2-5 is 1.5 meters between said discharge zone.
A kind of method of handling the dedusting discarded object of iron and steel enterprise is characterized in that may further comprise the steps:
(1) feed coal gas and Air mixing gas by gas jet 3, ignition, the temperature of combustion chamber 4 is 900 ℃, the negative pressure pressure in the flue 9 is 400 handkerchiefs;
(2) the dedusting discarded object of making behind the ball that will be mixed drops into material bin 1;
(3) owing to the gravity effect, the dedusting discarded object falls into the interval 2-1 of preheating oxidation of furnace chamber, and temperature is heated to 900 ℃ by 100 ℃, and the mist of generation is discharged through furnace chamber 2, flue 9, gas vent 10 successively, and the dedusting discarded object continues the whereabouts;
(4) the dedusting discarded object gets into 2-2 between the reducing zone, and temperature is reduced to 400 ℃ by 900 ℃, and the gas mixture body of generation is discharged through furnace chamber 2, flue 9, gas vent 10 successively, and the dedusting discarded object continues to fall;
(5) feed coal gas band 2-3 after scrubbed gas is heated to 400 ℃ through coal gas electromagnetic heater 6 and send into furnace chamber 2; The dedusting discarded object gets into coal gas band 2-3; Temperature remains unchanged, its temperature decision degree of metalization, and the high more then degree of metalization of temperature is high more; The protocorm of going back that generates continues to fall, and the mist of generation is discharged through furnace chamber 2, flue 9, gas vent 10 successively;
(6) go back protocorm and get into 2-4 between the cooling zone, temperature is reduced to 200 ℃ by 400 ℃
(7) go back protocorm and continue to fall to getting into 2-5 between discharge zone, temperature is reduced to 150 ℃;
(8) go back protocorm and fall into hopper 7, rely on the gravity effect to get into impeller 8-3, said impeller 8-3 is 6 grooves, and the weight of going back protocorm in every groove is 0.5kg.
(9) will go back protocorm and collect subsequent use from what impeller 8-3 discharged from the mist that gas vent 10 is discharged.
2-4 relies on the water quench cooling between above-mentioned said cooling zone.
The content of full iron is 34.91% in the above-mentioned said dedusting discarded object; The content of zinc oxide is 1.47%, and the content of lead oxide is 1.33%, and 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 unavailable materials such as calcium oxide, silica.
The above-mentioned said content of going back the smart powder of iron in the protocorm is 51.05%; The content of lead oxide is 0.004%; The content of zinc oxide is 0.004%, and the content of potassium oxide is 0.004%, and the content of sodium oxide molybdena is 0.01%; The content of silver oxide is 0.0021%, and all the other are unavailable materials such as calcium oxide, silica.
The content of potassium chloride is 30% in the above-mentioned said mist, 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 unavailable materials such as calcium oxide, silica.
Embodiment 2: a kind of redox stove is characterized in that it is made up 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 the furnace outer wall 12, and the difference of temperature is divided between the interval 2-1 of preheating oxidation, reducing zone between 2-2, coal gas band 2-3, cooling zone 2-5 between 2-4 and discharge zone from top to bottom according to when work; 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 the combustion chamber 4; Said coal gas electromagnetic heater 6 is communicated with coal gas band 2-3 in the 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 in furnace outer wall 12 bottoms, joins with hopper 7, and it is made up of impeller 8-3, reductor 8-4 and motor 8-5, and said impeller 8-3, reductor 8-4 and motor 8-5 are connected with connecting bushing 8-1 according to connecting axle 8-2 from inside to outside; Said gas vent 10 is positioned at the 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 is made up of fixing minor face and movably long limit.
The height of the interval 2-1 of above-mentioned said preheating oxidation is 1.8 meters, and the height of 2-2 is 3 meters between said reducing zone, and the height of said coal gas band 2-3 is 0.3 meter, and the height of 2-4 is 3 meters between said cooling zone, and the height of 2-5 is 2 meters between said discharge zone.
A kind of method of handling the dedusting discarded object of iron and steel enterprise is characterized in that may further comprise the steps:
(1) feed coal gas and Air mixing gas by gas jet 3, ignition, the temperature of combustion chamber 4 is 1250 ℃, the negative pressure pressure in the flue 9 is 800 handkerchiefs;
(2) the dedusting discarded object of making behind the ball that will be mixed drops into material bin 1;
(3) owing to the gravity effect, the dedusting discarded object falls into the interval 2-1 of preheating oxidation of furnace chamber, and temperature is heated to 1250 ℃ by 300 ℃, and the mist of generation is discharged through furnace chamber 2, flue 9, gas vent 10 successively, and the dedusting discarded object continues the whereabouts;
(4) the dedusting discarded object gets into 2-2 between the reducing zone, and temperature is reduced to 1100 ℃ by 1250 ℃, and the gas mixture body of generation is discharged through furnace chamber 2, flue 9, gas vent 10 successively, and the dedusting discarded object continues to fall;
(5) feed coal gas 2-3 band after scrubbed gas is heated to 1100 ℃ through coal gas electromagnetic heater 6 and send into furnace chamber 2; The dedusting discarded object gets into coal gas band 2-3; Temperature remains unchanged, its temperature decision degree of metalization, and the high more then degree of metalization of temperature is high more; The protocorm of going back that generates continues to fall, and the mist of generation is discharged through furnace chamber 2, flue 9, gas vent 10 successively;
(6) go back protocorm and get into 2-4 between the cooling zone, temperature is reduced to 400 ℃ by 1100 ℃
(7) go back protocorm and continue to fall to getting into 2-5 between discharge zone, temperature is reduced to 300 ℃;
(8) go back protocorm and fall into hopper 7, rely on the gravity effect to get into impeller 8-3, said impeller 8-3 is 8 grooves, and the weight of going back protocorm in every groove is 1kg.
(9) will go back protocorm and collect subsequent use from what impeller 8-3 discharged from the mist that gas vent 10 is discharged.
2-4 relies on the water quench cooling between above-mentioned said cooling zone.
The content of full iron is 45.36% in the above-mentioned said dedusting discarded object; The content of zinc oxide is 1.34%, and the content of lead oxide is 1.25%, and 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 unavailable materials such as calcium oxide, silica.
The above-mentioned said content of going back the smart powder of iron in the protocorm is 59.23%; The content of lead oxide is 0.002%; The content of zinc oxide is 0.002%, and the content of potassium oxide is 0.002%, and the content of sodium oxide molybdena is 0.005%; The content of silver oxide is 0.0018%, and all the other are unavailable materials such as calcium oxide, silica.
The content of potassium chloride is 50% in the above-mentioned said mist, 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 unavailable materials such as calcium oxide, silica.
Embodiment 3:
A kind of redox stove is characterized in that it is made up 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 the furnace outer wall 12, and the difference of temperature is divided between the interval 2-1 of preheating oxidation, reducing zone between 2-2, coal gas band 2-3, cooling zone 2-5 between 2-4 and discharge zone from top to bottom according to when work; 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 the combustion chamber 4; Said coal gas electromagnetic heater 6 is communicated with according to 2 coal gas band 2-3 in gas passage 5 and the furnace chamber; Said hopper 7 is positioned at furnace chamber 2 bottoms, stretches out; Said blanking device 8 is fixed in furnace outer wall 12 bottoms, joins with hopper 7, and it is made up of impeller 8-3, reductor 8-4 and motor 8-5, and said impeller 8-3, reductor 8-4 and motor 8-5 are connected with connecting bushing 8-1 according to connecting axle 8-2 from inside to outside; Said gas vent 10 is positioned at the redox furnace bottom; Wherein, the height of said combustion chamber 4 is a 0.8-1.5 rice, and said impeller 8-3 is 6 grooves.
Above-mentioned said material bin 1 is made up of fixing minor face and movably long limit.
Height between above-mentioned said preheating zoneofoxidation 2-1 is 1.6 meters; The height of 2-2 is 2.5 meters between said reducing zone; The height of said coal gas band 2-3 is 0.25 meter, and the height of 2-4 is 2.5 meters between said cooling zone, and the height of 2-5 is 1.8 meters between said discharge zone.
A kind of method of handling the dedusting discarded object of iron and steel enterprise is characterized in that may further comprise the steps:
(1) feed coal gas and Air mixing gas by gas jet 3, ignition, the temperature of combustion chamber 4 is 1000 ℃, the negative pressure pressure in the flue 9 is 600 handkerchiefs;
(2) the dedusting discarded object of making behind the ball that will be mixed drops into material bin 1;
(3) owing to the gravity effect, the dedusting discarded object falls into the interval 2-1 of preheating oxidation of furnace chamber 2, and temperature is heated to 1000 ℃ by 200 ℃, and the mist of generation is discharged through furnace chamber 2, flue 9, gas vent 10 successively, and the dedusting discarded object continues the whereabouts;
(4) the dedusting discarded object gets into 2-2 between the reducing zone, and temperature is reduced to 800 ℃ by 1000 ℃, and the gas mixture body of generation is discharged through furnace chamber 2, flue 9, gas vent 10 successively, and the dedusting discarded object continues to fall;
(5) feed coal gas band 2-3 after scrubbed gas is heated to 800 ℃ through coal gas electromagnetic heater 6 and send into furnace chamber 2; The dedusting discarded object gets into coal gas band 2-3; Temperature remains unchanged, its temperature decision degree of metalization, and the high more then degree of metalization of temperature is high more; The protocorm of going back that generates continues to fall, and the mist of generation is discharged through furnace chamber 2, flue 9, gas vent 10 successively;
(6) go back protocorm and get into 2-4 between the cooling zone, temperature is reduced to 300 ℃ by 800 ℃
(7) go back protocorm and continue to fall to getting into 2-5 between discharge zone, temperature is reduced to 250 ℃;
(8) go back protocorm and fall into hopper 7, rely on the gravity effect to get into impeller 8-3, said impeller 8-3 is 6 grooves, and the weight of going back protocorm in every groove is 0.8kg.
(9) will go back protocorm and collect subsequent use from what impeller 8-3 discharged from the mist that gas vent 10 is discharged.
Rely on the water quench cooling between above-mentioned said cooling zone.
The content of full iron is 40% in the above-mentioned said dedusting discarded object; The content of zinc oxide is 1.4%, and the content of lead oxide is 1.3%, and 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 unavailable materials such as calcium oxide, silica.
The above-mentioned said content of going back the smart powder of iron in the 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%.
The content of potassium chloride is 30% in the above-mentioned said mist, 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 unavailable materials such as calcium oxide, silica.
Claims (9)
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 the stove inwall is with interior space; Said furnace chamber is the overall space between stove inwall and the furnace outer wall, according to when work temperature difference be divided into from top to bottom that the preheating oxidation is interval, between the 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 the combustion chamber; Said coal gas electromagnetic heater is communicated with coal gas band in the furnace chamber according to gas passage; Said hopper is positioned at the furnace chamber bottom, stretches out; Said blanking device is fixed in the furnace outer wall bottom, joins with hopper, and it is made up 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 the redox furnace bottom; Wherein, the height of said combustion chamber is a 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 is made up of fixing minor face and movably long limit.
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 the interval height of said preheating oxidation is a 1.2-1.8 rice; Height between said reducing zone is a 2-3 rice; The height of said coal gas band is a 0.2-0.3 rice, and the height between said cooling zone is a 2-3 rice, and the height between said discharge zone is a 1.5-2 rice.
5. method of handling the dedusting discarded object of iron and steel enterprise is characterized in that concrete steps are following:
(1) feed coal gas and Air mixing gas by gas jet, ignition, the temperature of combustion chamber is 900-1250 ℃, the negative pressure pressure in the flue is the 400-800 handkerchief;
(2) the dedusting discarded object of making behind the ball that will be mixed drops into material bin;
(3) owing to the gravity effect, the 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 through furnace chamber, flue, gas vent successively, and the dedusting discarded object continues the whereabouts;
(4) the dedusting discarded object gets between the reducing zone, and temperature is reduced to 400-1100 ℃ by 900-1250 ℃, and the gas mixture body of generation is discharged through furnace chamber, flue, gas vent successively, and the dedusting discarded object continues to fall;
(5) feed the coal gas band after scrubbed gas is heated to 400-1100 ℃ through the coal gas electromagnetic heater and send into furnace chamber; The dedusting discarded object gets into the coal gas band; Temperature remains unchanged, its temperature decision degree of metalization, and the high more then degree of metalization of temperature is high more; The protocorm of going back that generates continues to fall, and the mist of generation is discharged through furnace chamber, flue, gas vent successively;
(6) go back protocorm and get between the cooling zone, temperature is reduced to 200-400 ℃ by 400-1100 ℃
(7) go back protocorm and continue to fall to getting between discharge zone, temperature is reduced to 150-300 ℃;
(8) go back protocorm and fall into hopper, rely on the gravity effect to get into impeller, said impeller is 6 grooves or 8 grooves, and the weight of going back protocorm in every groove is 0.5-1kg.
(9) will go back protocorm and collect subsequent use from what impeller was discharged from the mist that gas vent is discharged.
6. according to the said a kind of method of handling the dedusting discarded object of iron and steel enterprise of claim 5, it is characterized in that relying between said cooling zone the water quench cooling.
7. according to the said a kind of method of handling the dedusting discarded object of iron and steel enterprise of claim 5, it is characterized in that the said content of going back the smart powder of iron in the protocorm improves 30-45% than the content in the dedusting discarded object.
8. according to the said a kind of method of handling the dedusting discarded object of iron and steel enterprise of claim 5, it is characterized in that the said content of going back every kind of oxide in the protocorm is all less than 0.01%.
9. according to the said a kind of method of handling the dedusting discarded object of iron and steel enterprise of claim 5; The content that it is characterized in that potassium chloride in the said mist 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 unavailable materials such as calcium oxide, silica.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210101150.2A CN102628646B (en) | 2012-03-31 | 2012-03-31 | Oxidation reduction furnace and method for treating waste remained after dust-removal of iron and steel enterprises |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210101150.2A CN102628646B (en) | 2012-03-31 | 2012-03-31 | Oxidation reduction furnace and method for treating waste remained after dust-removal of iron and steel enterprises |
Publications (2)
| Publication Number | Publication Date |
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| CN102628646A true CN102628646A (en) | 2012-08-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111302386A (en) * | 2020-02-14 | 2020-06-19 | 北京科技大学 | Zinc-rich metallurgical dust mud and semi-dry desulfurization ash cooperative recycling method |
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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 |
| JP2009161390A (en) * | 2008-01-04 | 2009-07-23 | Aienji:Kk | Structure of laterally-flowing type lime kiln |
| 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 |
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| 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 |
| JP2009161390A (en) * | 2008-01-04 | 2009-07-23 | Aienji:Kk | Structure of laterally-flowing type lime kiln |
| 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 |
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| CN111302386A (en) * | 2020-02-14 | 2020-06-19 | 北京科技大学 | Zinc-rich metallurgical dust mud and semi-dry desulfurization ash cooperative recycling method |
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