CN112985064A - Sintering device and sintering method based on plasma hot blast stove - Google Patents
Sintering device and sintering method based on plasma hot blast stove Download PDFInfo
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- 238000005245 sintering Methods 0.000 title claims abstract description 218
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims description 160
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 20
- 238000011084 recovery Methods 0.000 claims description 19
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 17
- 239000001569 carbon dioxide Substances 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000012495 reaction gas Substances 0.000 claims description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000006477 desulfuration reaction Methods 0.000 abstract description 5
- 230000023556 desulfurization Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000000292 calcium oxide Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- -1 powder metallurgy Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention belongs to the technical field of chemical equipment, and relates to a sintering device and a sintering method based on a plasma hot blast stove, which comprises the following steps: 1) the gas source generates plasma hot air after passing through the plasma device; 2) the sintering material enters sintering equipment, hot air gas of plasma generated in the step 1) is adopted to provide heat for the sintering equipment, so that the temperature in the sintering equipment is kept at the temperature required by the sintering reaction, and the sintering material generates sintering tail gas and a sintering product; 3) collecting sintered products for later use; after the sintering tail gas is cooled, the sintering tail gas is directly recovered, or part of the sintering tail gas is returned to a plasma hot air device to adjust the temperature of plasma hot air gas, or part of the sintering tail gas is returned as a gas source. The invention has high sintering temperature, the gas generated by sintering does not need desulfurization and denitrification treatment, clean production is realized, the production cost is low, and the process flow is short; the sintering gas is recovered or circulated, and resources are saved.
Description
Technical Field
The invention belongs to the technical field of chemical equipment, and relates to a sintering device and a sintering method based on a plasma hot blast stove.
Background
Sintering is used as a traditional process, which means that a powdery material or a formed material pressed by the powdery material is converted into a compact body and is widely applied to producing ceramics, powder metallurgy, refractory materials, ultrahigh-temperature materials and the like; in the existing sintering process, the temperature is kept in a high temperature state continuously, because the sintering temperature is too low, the solid phase reaction rate is too low; in addition, in many cases, sintering needs to be performed in a specific atmosphere or vacuum, and it is also very important to control the gas phase partial pressure in the sintering process.
In industry, when a sintering device works, heat is generally supplied by a mode of combining a blast furnace and fuel, the fuel generally adopts coal, blast furnace gas or other fuel gas, oil and the like, and high temperature is achieved, so that the fuel consumption is high and the production cost is high; meanwhile, during sintering, the gas generated in the sintering process has more components and low content, is generally directly discharged out of sintering equipment and cannot be well recycled, so that resource waste is caused; meanwhile, because sulfur and nitrogen exist during sintering, discharged gas contains a large amount of sulfur and nitrogen, and once the contents of sulfur and nitrogen exceed standards, the gas can be discharged only through desulfurization, denitrification and purification treatment, so that the pollution to the environment is avoided, the requirement of clean production cannot be met, and the process is complex.
Disclosure of Invention
Aiming at the technical problems of the existing sintering equipment, the invention provides a sintering device and a sintering method based on a plasma hot blast stove, the sintering temperature is high, the gas generated by sintering does not need desulfurization and denitrification treatment, the clean production is realized, the production cost is low, and the process flow is short; the sintering gas is recycled, and resources are saved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a sintering method based on a plasma hot blast stove comprises the following steps:
1) the gas source generates plasma hot air after passing through the plasma device;
2) the sintering material enters sintering equipment, hot air gas of plasma generated in the step 1) is adopted to provide heat for the sintering equipment, so that the temperature in the sintering equipment is kept at the temperature required by the sintering reaction, and the sintering material generates sintering tail gas and a sintering product;
3) collecting sintered products for later use; after the sintering tail gas is cooled, the sintering tail gas is directly recovered, or part of the sintering tail gas is returned to a plasma hot air device to adjust the temperature of plasma hot air gas, or part of the sintering tail gas is returned as a gas source.
Further, the gas source is one or a mixture of two of reaction gas required by sintering reaction, sintering tail gas generated by sintering and sintering reaction protective gas.
Further, the sintering device based on the plasma hot blast stove comprises the plasma hot blast stove and sintering equipment;
the plasma hot blast stove comprises a stove body and a plasma generator arranged on a stove body shell; the plasma generator is communicated with the inner cavity of the furnace body; the furnace body is respectively provided with a temperature adjusting gas source inlet and a hot air gas outlet; a starting gas source inlet is arranged on the plasma generator; the hot air outlet is communicated with the temperature-adjusting air source inlet through sintering equipment; the sintering equipment is respectively provided with a material inlet and a material outlet; the material inlet is communicated with the material outlet. .
Furthermore, the plasma hot blast stove also comprises an air source pipeline communicated with the starting air source inlet.
Further, the gas source pipeline is one or a mixed gas circuit of a carbon monoxide gas circuit, a carbon dioxide exchange gas circuit, a nitrogen gas circuit, a sulfur steam gas circuit or a sulfur dioxide gas circuit.
Further, the number of the plasma generators is one or more.
Furthermore, the sintering device based on the plasma hot blast stove also comprises a cooling recovery tank communicated with the sintering equipment; and the cooling recovery tank is respectively communicated with the starting air source inlet and the temperature-adjusting air source inlet.
Furthermore, the sintering device based on the plasma hot blast stove also comprises first control valves arranged between the cooling recovery tank and the inlets of the starting gas sources respectively.
Further, the sintering device based on the plasma hot blast stove also comprises a second control valve arranged between the cooling recovery tank and the inlet of the temperature-adjusting gas source.
Further, the sintering equipment is a tunnel kiln, a box type sintering kiln or a roller kiln.
The invention has the beneficial effects that:
1. the sintering method based on the plasma hot blast stove comprises the following steps: 1) the gas source generates plasma hot air after passing through the plasma device; 2) the sintering material enters sintering equipment, hot air gas of plasma generated in the step 1) is adopted to provide heat for the sintering equipment, so that the temperature in the sintering equipment is kept at the temperature required by the sintering reaction, and the sintering material generates sintering tail gas and a sintering product; 3) collecting sintered products for later use; after the sintering tail gas is cooled, the sintering tail gas is directly recovered, or part of the sintering tail gas is returned to a plasma hot air device to adjust the temperature of plasma hot air gas, or part of the sintering tail gas is returned as a gas source. The gas source is one or the mixture of two of reaction gas required by sintering reaction, sintering tail gas generated by sintering and sintering reaction protective gas. Only reaction gas or process synthesis gas is contained in the sintering process, and the gas content from sintering equipment is high, so that the gas is convenient to recover; meanwhile, as for a sulfur-free gas source, the gas from the sintering equipment does not contain sulfur and nitrogen, and the gas can be recovered by simple purification and impurity removal without being subjected to desulfurization and denitrification treatment; shortening the process flow of sintering tail gas treatment and reducing the production cost.
2. The sintering device based on the plasma hot blast stove comprises the plasma hot blast stove and sintering equipment; the plasma hot blast stove comprises a stove body and a plasma generator arranged on a stove body shell; the plasma generator is communicated with the inner cavity of the furnace body; the furnace body is respectively provided with a temperature adjusting gas source inlet and a hot air gas outlet; the hot air outlet is communicated with the temperature adjusting air source inlet through sintering equipment. The number of the plasma generators is one or more. The invention adopts high-temperature hot air generated by the plasma hot air furnace as a heat source of sintering equipment, the heating power can reach 1000KW, the higher temperature in the sintering process is ensured, and the sintering speed is accelerated.
3. The sintering device based on the plasma hot blast stove further comprises a cooling recovery tank communicated with the sintering equipment; and the cooling recovery tank is respectively communicated with the starting air source inlet and the temperature-adjusting air source inlet. Gas from the sintering equipment can be used as a starting gas source, a heat source is provided for the sintering equipment again after the plasma hot blast stove is used, the gas source is recycled, and the purposes of energy conservation, emission reduction and clean production are achieved; and can also be used as temperature adjusting gas to enter the furnace body to realize temperature adjustment.
Drawings
FIG. 1 is a schematic diagram of a sintering device based on a plasma hot blast stove provided by the invention;
wherein:
1, a furnace body; 2-a plasma generator; 3-starting an air source inlet; 4-cooling and recovering tank; 5-temperature regulating gas source inlet; 6-hot air outlet; 7-sintering equipment; 8-a first control valve; 9-second control valve.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 1, the sintering apparatus based on a plasma hot blast stove provided in this embodiment includes a plasma hot blast stove and a sintering device 7.
The plasma hot blast stove provided by the embodiment comprises a stove body 1 and a plasma generator 2 arranged on the shell of the stove body 1; the plasma generator 2 is communicated with the inner cavity of the furnace body 1; the furnace body 1 is respectively provided with a temperature adjusting gas source inlet 5 and a hot air gas outlet 6; a starting gas source inlet 3 is arranged on the plasma generator 2; the hot air outlet 6 is communicated with the temperature adjusting gas source inlet 5 through a sintering device 7; an insulating layer and a fire-resistant layer are laid inside the furnace body 1.
The plasma hot blast stove provided by the embodiment further comprises an air source pipeline communicated with the starting air source inlet 3. The gas source pipeline is a carbon monoxide gas circuit.
The present embodiment provides one plasma generator 2.
The sintering device based on the plasma hot blast stove provided by the embodiment also comprises a cooling recovery tank 4 communicated with the sintering equipment 7; the cooling recovery tank 4 is respectively communicated with the starting air source inlet 3 and the temperature-adjusting air source inlet 5. The sintering device based on the plasma hot blast stove further comprises first control valves 8 which are arranged between the cooling recovery tank 4 and the starting gas source inlets 3 respectively. The sintering device based on the plasma hot blast stove further comprises a second control valve 9 arranged between the cooling recovery tank 4 and the temperature-adjusting gas source inlet 5.
The sintering equipment 7 provided in this embodiment is a box type sintering kiln. A material inlet and a material outlet are respectively arranged on the sintering equipment 7; the material inlet is communicated with the material outlet. The sintering equipment 7 is also respectively provided with an air inlet and an air outlet; the object inlet is communicated with the air outlet. The hot air outlet 6 is communicated with the air inlet; the air outlet is respectively communicated with the starting air source inlet 3 and the temperature adjusting air source inlet 5 after passing through the cooling recovery tank 4.
The sintering device based on the plasma hot blast stove provided by the embodiment comprises the following sintering methods:
1) the gas source generates plasma hot air after passing through the plasma device;
2) sintering materials enter a sintering device 7 from a material inlet, hot air gas of the plasma generated in the step 1) is adopted to provide heat for the sintering device 7, so that the temperature in the sintering device 7 is kept at the temperature required by the sintering reaction, and the sintering materials generate sintering tail gas and sintering products;
3) collecting sintered products for later use; after the sintering tail gas is cooled, the sintering tail gas is directly recovered, or part of the sintering tail gas is returned to a plasma hot air device to adjust the temperature of plasma hot air gas, or part of the sintering tail gas is returned as a gas source.
The sintering process of the sintering apparatus according to the present embodiment will be described by taking the sintering of iron ore as an example.
1) A carbon monoxide gas source conveyed from the CO gas path enters the starting gas source inlet 3 and enters the furnace body 1 through the plasma generator 2 after passing through the first control valve 8, the carbon monoxide gas source forms CO plasma hot air gas under the action of the plasma generator 2, and the CO plasma hot air gas is discharged out of the furnace body 1 from the hot air gas outlet 6;
2) the CO plasma hot air gas from the hot air gas outlet 6 enters the sintering equipment 7 from the air inlet, so that the temperature in the sintering equipment 7 is kept at the temperature required by the iron ore sintering reaction, generally 1250-1500 ℃, and the iron ore entering the sintering equipment 7 is subjected to the sintering reaction to generate sintering tail gas CO and a sintering product iron oxide;
3) the sintered product is recovered from the material outlet and enters the next procedure, and the sintering tail gas CO enters the cooling recovery tank 4 from the gas outlet, and can be directly recovered due to the high content of the CO gas and no other impurity gas in the system; or a part of the gas can be taken as a gas source and returned to the starting gas source inlet 3 for cyclic utilization; or a part of the plasma hot air can be taken as a temperature adjusting air source and returned to the furnace body 1 from the temperature adjusting air source inlet 5, so that the temperature of the plasma hot air discharged from the hot air gas outlet 6 is kept at the temperature required by sintering.
In this embodiment, the iron ore is in the form of pellet powder, and the sintering device 7 is a belt sintering kiln. When the iron ore is in a pellet shape, the sintering device 7 adopts a roller sintering kiln.
In the embodiment, after the CO gas passes through the plasma generator 2, the hot air gas which generates high-temperature plasma flows out of the hot air gas outlet 6 in the furnace body 1 and enters the sintering equipment 7, so that a high-temperature heat source is provided for the sintering equipment 7, the temperature required by sintering is reached, and the substances in the sintering equipment 7 are rapidly sintered; finally, the sintering tail gas discharged from the rear end of the sintering device 7 is collected and cooled by the cooling recovery tank 4, and the CO concentration in the sintering tail gas is high and can be directly recovered as the gas source adopted by the whole sintering device is carbon monoxide gas; meanwhile, the device does not generate sulfur-containing and nitrogen-containing gas, so that only simple purification and impurity removal are needed, desulfurization and denitrification treatment is not needed, clean production is realized, and the process flow is shortened; the sintering tail gas part can return to the furnace body 1 from the temperature adjusting gas inlet 5 to adjust the temperature of hot air in the furnace body 1, so that the temperature regulation and control in production are met; and part of the gas can be returned to be used as the gas source of the plasma generator 2, so that the using amount of the gas source is reduced, the production cost is reduced, and the resources are saved. (the smoke content is only 20-30% of the original content), smoke pipelines and dust removal are reduced, the electric charge is reduced, and the cost and resources are saved.
Example 2
Different from the embodiment 1, there are two plasma generators 2, and the two plasma generators 2 are uniformly distributed on the outer shell of the furnace body 1 along the axial direction of the furnace body 1.
In this embodiment, the gas source pipeline is a carbon dioxide gas circuit. The sintering apparatus 7 is a tunnel kiln.
The sintering process of the sintering apparatus according to the present example will be described with reference to the sintering of CaO refractories.
1) From CO2The carbon dioxide gas source delivered from the gas circuit enters the starting gas source inlet 3 and enters the furnace body 1 through the plasma generator 2 after passing through the first control valve 8, and the carbon dioxide gas source forms CO under the action of the plasma generator 22Plasma hot air gas is discharged out of the furnace body 1 from a hot air gas outlet 6;
2) CO from hot air outlet 62The plasma hot air enters the sintering equipment 7, so that the temperature in the sintering equipment 7 is kept at the temperature required by the sintering reaction of the CaO refractory, the sintering temperature of the CaO refractory is 1800 ℃ generally, the carbon dioxide plasma hot air is blown into the sintering equipment 7 through a fan, so that the calcium oxide refractory entering the sintering equipment is subjected to the sintering reaction to generate sintering tail gas CO2And CaO refractory (refractory formed by pressing CaO powder and calcium carbonate powder);
3) recovering the sintered refractory material product, entering the next process, and recovering the sintering tail gas CO2Into the cooling recovery tank 4 due to CO2The gas content is high, and the system has no other impurity gas and can be directly recycled; or a part of the gas can be taken as a gas source and returned to the starting gas source inlet 3 for cyclic utilization; or a part of the plasma hot air can be taken as a temperature adjusting air source and returned to the furnace body 1 from the temperature adjusting air source inlet 5, so that the temperature of the plasma hot air discharged from the hot air gas outlet 6 is kept at the temperature required by sintering.
Example 3
Unlike example 1, in this example, the gas source line was a mixture of nitrogen and carbon dioxide. The sintering equipment 7 is a roller kiln.
The sintering process of the sintering apparatus provided in this embodiment will be described by taking sintering of ceramics as an example.
1) From N2And CO2The nitrogen gas source conveyed by the gas circuit enters the starting gas source inlet 3 and enters the furnace body 1 through the plasma generator 2 after passing through the first control valve 8, and N2And CO2Formation of N by the action of the plasma generator 22And CO2Plasma hot air gas is discharged out of the furnace body 1 from a hot air gas outlet 6;
2) the CO plasma hot air gas from the hot air gas outlet 6 enters the sintering equipment 7, so that the temperature in the sintering equipment 7 is kept at the temperature required by the ceramic sintering reaction, the general ceramic sintering temperature is 1000-1500 ℃, and N is2And CO2Blowing the plasma hot air into the sintering equipment 7 through a fan, so that a sintering reaction is generated in the sintering equipment to generate a ceramic burning refractory material and sintering tail gas (nitrogen and carbon dioxide);
3) the sintered product is recovered and enters the next procedure, and sintering tail gas (nitrogen and carbon dioxide) enters the cooling recovery tank 4, and can be directly recovered due to the high content of the nitrogen and carbon dioxide gas and no other impurity gas in the system; or a part of the gas can be taken as a gas source and returned to the starting gas source inlet 3 for cyclic utilization; or a part of the plasma hot air can be taken as a temperature adjusting air source and returned to the furnace body 1 from the temperature adjusting air source inlet 5, so that the temperature of the plasma hot air discharged from the hot air gas outlet 6 is kept at the temperature required by sintering.
In this embodiment, nitrogen is used only as a shielding gas in the sintering process, and does not participate in the sintering reaction, nor is the production gas generated by sintering.
Claims (10)
1. A sintering method based on a plasma hot blast stove is characterized in that: the sintering method comprises the following steps:
1) the gas source generates plasma hot air after passing through the plasma device;
2) the sintering material enters sintering equipment, hot air gas of plasma generated in the step 1) is adopted to provide heat for the sintering equipment, so that the temperature in the sintering equipment is kept at the temperature required by the sintering reaction, and the sintering material generates sintering tail gas and a sintering product;
3) collecting sintered products for later use; after the sintering tail gas is cooled, the sintering tail gas is directly recovered, or part of the sintering tail gas is returned to a plasma hot air device to adjust the temperature of plasma hot air gas, or part of the sintering tail gas is returned as a gas source.
2. The plasma-based hot blast stove sintering method according to claim 1, characterized in that: the gas source is one or the mixture of two of reaction gas required by sintering reaction, sintering tail gas generated by sintering and sintering reaction protective gas.
3. A sintering device for realizing the sintering method based on the plasma hot blast stove in claim 2, which is characterized in that: the sintering device comprises a plasma hot blast stove and sintering equipment (7);
the plasma hot blast stove comprises a stove body (1) and a plasma generator (2) arranged on the shell of the stove body (1); the plasma generator (2) is communicated with the inner cavity of the furnace body (1); the furnace body (1) is respectively provided with a temperature-adjusting gas source inlet (5) and a hot air gas outlet (6); a starting gas source inlet (3) is arranged on the plasma generator (2); the hot air outlet (6) is communicated with the temperature adjusting air source inlet (5) through a sintering device (7); the sintering equipment (7) is respectively provided with a material inlet and a material outlet; the material inlet is communicated with the material outlet.
4. The sintering apparatus according to claim 3, wherein: the plasma hot blast stove also comprises an air source pipeline communicated with the starting air source inlet (3).
5. The sintering apparatus according to claim 4, wherein: the gas source pipeline is one or a mixed gas circuit of a carbon monoxide gas circuit, a carbon dioxide exchange gas circuit, a nitrogen gas circuit, a sulfur steam gas circuit or a sulfur dioxide gas circuit.
6. Sintering device according to claim 3 or 4 or 5, characterized in that: the number of the plasma generators (2) is one or more.
7. The sintering apparatus according to claim 6, wherein: the sintering device also comprises a cooling recovery tank (4) communicated with the sintering equipment (7); and the cooling recovery tank (4) is respectively communicated with the starting air source inlet (3) and the temperature-adjusting air source inlet (5).
8. The sintering apparatus according to claim 7, wherein: the sintering device also comprises first control valves (8) arranged between the cooling recovery tank (4) and the starting gas source inlets (3) respectively.
9. The sintering apparatus according to claim 8, wherein: the sintering device also comprises a second control valve (9) arranged between the cooling recovery tank (4) and the temperature-adjusting gas source inlet (5).
10. The sintering apparatus according to claim 3, wherein: the sintering equipment (7) is a tunnel kiln, a box type sintering kiln or a roller kiln.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114525400A (en) * | 2021-12-31 | 2022-05-24 | 陕西聚能新创煤化科技有限公司 | Ore decomposition production method and system by using novel plasma hot blast stove |
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|---|---|---|---|---|
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