CN102051519A - Lean slag process in vanadium iron smelting and special device - Google Patents
Lean slag process in vanadium iron smelting and special device Download PDFInfo
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- CN102051519A CN102051519A CN 201110024188 CN201110024188A CN102051519A CN 102051519 A CN102051519 A CN 102051519A CN 201110024188 CN201110024188 CN 201110024188 CN 201110024188 A CN201110024188 A CN 201110024188A CN 102051519 A CN102051519 A CN 102051519A
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Abstract
The invention relates to a lean slag process in vanadium iron smelting and a special device, in particular to a lean slag process and device for complete series vanadium iron smelting, belonging to the technical field of vanadium iron production in metallurgy. The lean slag process in vanadium iron smelting comprises the following steps: in the process of vanadium iron smelting by using an electro-aluminothermic method, after the smelting and reaction of charging material are finished and molten slag is separated from alloy, stopping electrode concurrent heating, and immediately jetting aluminum powder into the molten slag by using high-pressure inert gas; and meanwhile, rotating the furnace body so that the aluminum powder is sufficiently mixed with the molten slag under the dual actions of jetting gas shock and mixing due to the rotation of the furnace body, continuing reducing unreduced vanadium oxide in the molten slag and adsorbing alloy particles suspended in the molten slag, and inserting the electrode into the slag layer again to continue concurrent heating smelting so that residual vanadium in the molten slag is further reduced to generate vanadium iron. According to the invention, the lean slag effect is obviously enhanced; and in the vanadium iron smelting process by using the electro-aluminothermic method, a powder jetting lean slag process and a special device by using broad-spectrum vanadium oxide as the raw material are utilized to produce multiple designations of vanadium iron, so that the content of all vanadium in the vanadium iron furnace slag is reduced from 3-4% to about 1.2%, and the recovery rate of vanadium is increased to higher than 95%.
Description
Technical field
The present invention relates to a kind of vanadium iron and smelt the lean slag technology and the specific equipment of lean slag technology and specific equipment, particularly complete series vanadium iron (40～80 vanadium iron) smelting, belong to metallurgical vanadium iron production technical field.
Background technology
Vanadium iron is a kind of important alloy addition, electro-aluminothermic process smelting ferrovanadium commonly used with cycle weak point, flexible operation, product structure stablize, quality is good etc., and characteristics are widely used, at present, a lot of famous manufacturers mostly adopt V2O3 electro-aluminothermic process smelting technology and specific equipment, but, this method and specific equipment vanadium recovery are obviously on the low side, and generally vanadium recovery can only reach about 93%.For example: in the electro-aluminothermic process smelting ferrovanadium, adopt the single or raw material that is mixed of multiple vanadium oxide (V2O5, V2O3, VO2, VO), produce many trades mark vanadium iron (40～80 vanadium iron), generally vanadium recovery remains on about 93%, full content of vanadium 3%-4% in the ferrovanadium slag.
Summary of the invention
The object of the invention provides a kind of vanadium iron and smelts lean slag technology and specific equipment, by improving the reacting dynamics condition of furnace charge in smelting, strengthens the thermite reduction effect, reduce the residual content of vanadium of ferrovanadium slag, improve the vanadium smelting rate of recovery, reduce smelting cost, solve background technology and have the problems referred to above.
Technical scheme of the present invention is:
A kind of vanadium iron is smelted lean slag technology, in electro-aluminothermic process smelting ferrovanadium process, smelting reaction when furnace charge finishes, after slag and alloy are realized separating, stop the electrode concurrent heating, be injected in the slag with the high-pressure inert gas jet with being about to the powdery aluminium powder, the while rotating furnace body, aluminium powder stirs under the dual function fully mixed with slag in winding-up gas shock and body of heater rotation, still unreduced barium oxide and absorption are suspended in the alloy particle in the slag in the continuation reduction slag, electrode inserts slag blanket again to be continued concurrent heating and smelts, and allows in the slag residual vanadium further reduce the generation vanadium iron.
Processing step more specifically: after 1. the reaction of electro-aluminothermic process smelting furnace material finishes, slag fluidity better be slag to be in flow state, temperature be 1800-2100 when spending, stop the electrode concurrent heating; 2. descend spray gun to treating the seat in the plane, having a power failure simultaneously promotes electrode and opens the body of heater rotation, starts the auto-programming that dusts; When spray gun drops to the spray gun stage casing, help and blow pneumavalve and open automatically, spray gun continues to descend; 3. work as spray gun and drop to working position, discharging pneumavalve, sulfuration pneumavalve and the main pneumavalve that blows are opened simultaneously automatically, begin winding-up; 4. reach and set the winding-up time, close discharging pneumavalve, sulfuration pneumavalve, main pneumavalve and the ftercompction pneumavalve of blowing automatically, promote spray gun; 5. be promoted to when treating the seat in the plane when spray gun, close automatically to help and blow pneumavalve, the automated procedure that dusts finishes; 6. stop the body of heater rotation simultaneously, continue electrode and smelt concurrent heating 5～8 minutes, the lean slag technology of so far dusting finishes.
The working position that said spray gun descends is set according to the different thickness of slag layer that form of material proportion, and the variation range of thickness of slag layer is 300～800mm.
The aluminium powder that is injected in the molten slag layer is: content of aluminium powder is not less than 99%; Powder particles is 40～100 orders.
When beginning to jet, the ftercompction pneumavalve is dynamically ftercompction all the time, keeps the powder spraying pot internal pressure constant, jets 60～120 seconds.
Calculate according to wide spectrum vanadium oxide raw material (V2O5, V2O3, VO2, VO) electro-aluminothermic process smelting ferrovanadium principle: pure V2O3 smelting ferrovanadium thickness of slag layer is 300～500mm, pure V2O5 smelting ferrovanadium thickness of slag layer is 700～800mm, and mixing match vanadium oxide raw material smelting ferrovanadium thickness of slag layer is 600～700mm.Therefore the variation range of the suitable thickness of slag layer of lean slag technology that dusts of wide spectrum vanadium oxide raw material electro-aluminothermic process smelting ferrovanadium is 300～800mm.
According to material proportion, the slag degree of depth and the quantity of slag fluctuation of wide spectrum vanadium oxide raw material electro-aluminothermic process smelting ferrovanadium, online satisfied winding-up amount 30～80Kg/ time, online adjusting injecting velocity is realized the scope of 15～40Kg/Min.
Automatically regulate the valve of re-blowing, baiting valve, mainly blow valve and help the aperture of blowing valve, during winding-up powder spraying pot is carried out dynamic ftercompction, the constant voltage 0.28Mpa state of powder spraying pot when keeping winding-up effectively guarantees winding-up pressure reduction and winding-up effect.
Behind the lean slag process implementing, carry out electrode concurrent heating 5-8 minute again, smelt and finish.
A kind of vanadium iron is smelted the lean slag specific equipment, comprise nitrogen balance jar, powder spraying pot, spray gun, smelting furnace, main blowpipe road, help the blowpipe road, the pipeline of re-blowing, curing tube, lance tube, the nitrogen balance jar connects powder spraying pot by the pipeline of re-blowing, curing tube, by main blowpipe road, help blowpipe road, lance tube to connect spray gun; The powder spraying pot discharging connects main blowpipe road, and spray gun is arranged on the smelting furnace top.
In the powder spraying pot discharging discharging pneumavalve is set, curing tube is provided with the sulfuration pneumavalve, and main blowpipe road is provided with the master and blows pneumavalve, and the pipeline of re-blowing is provided with the ftercompction pneumavalve, helps the setting of blowpipe road to help and blows pneumavalve; During winding-up powder spraying pot is carried out dynamic ftercompction, the constant voltage 0.28Mpa state of powder spraying pot when keeping winding-up effectively guarantees winding-up pressure reduction and winding-up effect.
Spray gun moves up and down, and is provided with the moving range that limes superiors, smallest limit limit spray gun, and when normally jetting, spray gun is positioned at working position.
The spray gun refractory materials changes magnalium chromium made from mixed materials into by high alumina matter material, strengthens the high temperature resistant and anti-scouring effect of the anti-material of spray gun, and be increased to 45 stoves more than by 8 original stoves the work-ing life of lance head section.
Beneficial effect of the present invention: after adopting the lean slag Processes and apparatus that dusts, the lean slag effect significantly improves, implementing with wide spectrum vanadium oxide (V2O5, V2O3, VO2, VO) in the electro-aluminothermic process smelting ferrovanadium is dust the lean slag technology and the specific equipment of many trades mark of raw material production vanadium iron (40～80 vanadium iron), full content of vanadium is dropped to about 1.2% by 3%-4%, and vanadium recovery is brought up to more than 95%.
Description of drawings
Fig. 1 is embodiment of the invention equipment, processing set-up schematic flow sheet;
Among the figure: nitrogen balance jar 1, powder spraying pot 2, spray gun 3, smelting furnace 4, main blowpipe road 5, help blowpipe road 6, the pipeline 7 of re-blowing, curing tube 8, lance tube 9, limes superiors 10, smallest limit 11, working position 12.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described by embodiment.
A kind of vanadium iron is smelted lean slag technology, comprises following processing step: after 1. the reaction of electro-aluminothermic process smelting furnace material finished, slag fluidity better was that slag is in flow state, when temperature is 1800 ℃-2100 ℃, stops the electrode concurrent heating; 2. descend spray gun to treating the seat in the plane, having a power failure simultaneously promotes electrode and opens the body of heater rotation, starts the auto-programming that dusts; When spray gun drops to the spray gun stage casing, help and blow pneumavalve and open automatically, spray gun continues to descend; 3. work as spray gun and drop to working position, discharging pneumavalve, sulfuration pneumavalve and the main pneumavalve that blows are opened simultaneously automatically, begin winding-up; 4. reach and set the winding-up time, close discharging pneumavalve, sulfuration pneumavalve, main pneumavalve and the ftercompction pneumavalve of blowing automatically, promote spray gun; 5. be promoted to when treating the seat in the plane when spray gun, close automatically to help and blow pneumavalve, the automated procedure that dusts finishes; 6. stop the body of heater rotation simultaneously, continue electrode and smelt concurrent heating 5～8 minutes, the lean slag technology of so far dusting finishes.
A kind of vanadium iron is smelted the lean slag specific equipment, comprise nitrogen balance jar 1, powder spraying pot 2, spray gun 3, smelting furnace 4, main blowpipe road 5, help blowpipe road 6, the pipeline 7 of re-blowing, curing tube 8, lance tube 9, nitrogen balance jar 1 connects powder spraying pots 2 by the pipeline 7 of re-blowing, curing tube 8, by main blowpipe road 5, help blowpipe road 6, lance tube 9 to connect spray guns 3; Powder spraying pot 2 dischargings connect main blowpipe road 5, and spray gun 3 is arranged on smelting furnace 4 tops.
In the powder spraying pot discharging discharging pneumavalve is set, curing tube is provided with the sulfuration pneumavalve, and main blowpipe road is provided with the master and blows pneumavalve, and the pipeline of re-blowing is provided with the ftercompction pneumavalve, helps the setting of blowpipe road to help and blows pneumavalve; During winding-up powder spraying pot is carried out dynamic ftercompction, the constant voltage 0.28Mpa state of powder spraying pot when keeping winding-up effectively guarantees winding-up pressure reduction and winding-up effect.
Spray gun moves up and down, and is provided with the moving range that limes superiors 10, smallest limit 11 limit spray gun, and when normally jetting, spray gun is positioned at working position 12.
Embodiment one:
1, configuration vanadium iron master furnace charge: contain the V2O33000Kg of vanadium 64.11%, aluminum shot 1280Kg, iron powder 375Kg prepares aluminium powder 50Kg, puts into the batch can that dusts (thickness of slag layer 300～500mm);
2, use the electro-aluminothermic process smelting ferrovanadium, slag and alloy stop the electrode concurrent heating after realizing separating, be injected in the slag with high-pressure inert gas (N2) jet with being about to aluminium powder, the slag blanket degree of depth is about 420mm, and the spray gun degree of depth (under the top of the slag) is 200mm, injecting velocity 20Kg/Min, the winding-up time is 65s, keep powder spraying pot internal pressure 0.28Mpa, after treating fully to reduce, carry rifle automatically and finish the lean slag process of dusting, the electrode of rotating furnace body, and then insertion simultaneously continues concurrent heating and smelted 8 minutes;
Obtain finished product and contain vanadium 2285Kg, vanadium recovery 95.25%.
Embodiment two:
1, configuration vanadium iron master furnace charge: contain the V2O52800Kg of vanadium 98.07%, aluminum shot 1450Kg, iron powder 340Kg prepares aluminium powder 60Kg, puts into the batch can that dusts (thickness of slag layer 700～800mm);
2, use the electro-aluminothermic process smelting ferrovanadium, slag and alloy stop the electrode concurrent heating after realizing separating, be injected in the slag with high-pressure inert gas (N2) jet with being about to aluminium powder, the slag blanket degree of depth is 770mm, and the spray gun degree of depth (under the top of the slag) is 450mm, injecting velocity 35Kg/Min, the winding-up time is 95s, keep powder spraying pot internal pressure 0.28Mpa, after treating fully to reduce, carry rifle automatically and finish the lean slag process of dusting, the electrode of rotating furnace body, and then insertion simultaneously continues concurrent heating and smelted 6 minutes;
Obtain finished product and contain vanadium 1850Kg, vanadium recovery 95.10%.
Embodiment three:
1, configuration vanadium iron master furnace charge: contain the V2O31000Kg of vanadium 64.170%, contain the V2O52000Kg of vanadium 98.20%, aluminum shot 1280Kg, iron powder 315Kg prepares aluminium powder 55Kg, puts into the batch can that dusts (thickness of slag layer 600～700mm);
2, use the electro-aluminothermic process smelting ferrovanadium, slag and alloy stop the electrode concurrent heating after realizing separating, be injected in the slag with high-pressure inert gas (N2) jet with being about to aluminium powder, the slag blanket degree of depth is about 650mm, and the spray gun degree of depth (under the top of the slag) is 350mm, injecting velocity 30Kg/Min, the winding-up time is 85s, keep powder spraying pot internal pressure 0.28Mpa, after treating fully to reduce, carry rifle automatically and finish the lean slag process of dusting, the electrode of rotating furnace body, and then insertion simultaneously continues concurrent heating and smelted 6 minutes;
Obtain finished product and contain vanadium 2180Kg, vanadium recovery 95.45%.
Claims (10)
1. a vanadium iron is smelted lean slag technology, it is characterized in that: in electro-aluminothermic process smelting ferrovanadium process, smelting reaction when furnace charge finishes, after slag and alloy are realized separating, stop the electrode concurrent heating, be injected in the slag with the high-pressure inert gas jet with being about to the powdery aluminium powder, the while rotating furnace body, aluminium powder stirs under the dual function fully mixed with slag in winding-up gas shock and body of heater rotation, still unreduced barium oxide and absorption are suspended in the alloy particle in the slag in the continuation reduction slag, electrode inserts slag blanket again to be continued concurrent heating and smelts, and allows in the slag residual vanadium further reduce the generation vanadium iron.
2. smelt lean slag technology according to the described vanadium iron of claim 1, it is characterized in that processing step is as follows more specifically: after 1. the reaction of electro-aluminothermic process smelting furnace material finishes, slag fluidity better be slag to be in flow state, temperature be 1800-2100 when spending, stop the electrode concurrent heating; 2. descend spray gun to treating the seat in the plane, having a power failure simultaneously promotes electrode and opens the body of heater rotation, starts the auto-programming that dusts; When spray gun drops to the spray gun stage casing, help and blow pneumavalve and open automatically, spray gun continues to descend; 3. work as spray gun and drop to working position, discharging pneumavalve, fluidisation pneumavalve and the main pneumavalve that blows are opened simultaneously automatically, begin winding-up; 4. reach and set the winding-up time, close discharging pneumavalve, fluidisation pneumavalve, main pneumavalve and the ftercompction pneumavalve of blowing automatically, promote spray gun; 5. be promoted to when treating the seat in the plane when spray gun, close automatically to help and blow pneumavalve, the automated procedure that dusts finishes; 6. stop the body of heater rotation simultaneously, continue electrode and smelt concurrent heating 5～8 minutes, the lean slag technology of so far dusting finishes.
3. smelt lean slag technology according to claim 1 or 2 described vanadium iron, the aluminium powder that it is characterized in that being injected in the molten slag layer is: content of aluminium powder is not less than 99%; Powder particles is 40～100 orders.
4. smelt lean slag technology according to claim 1 or 2 described vanadium iron, it is characterized in that the working position that said spray gun descends, set according to the different thickness of slag layer that form of material proportion, the variation range of thickness of slag layer is 300～800mm.
5. smelt lean slag technology according to claim 1 or 2 described vanadium iron, when it is characterized in that beginning to jet, the ftercompction pneumavalve is dynamically ftercompction all the time, keeps the powder spraying pot internal pressure constant, jets 60～120 seconds.
6. smelt lean slag technology according to claim 1 or 2 described vanadium iron, it is characterized in that winding-up amount 30～80Kg/ time, online adjusting injecting velocity is realized the scope of 15～40Kg/Min.
7. a vanadium iron is smelted the lean slag specific equipment, it is characterized in that comprising nitrogen balance jar (1), powder spraying pot (2), spray gun (3), smelting furnace (4), main blowpipe road (5), help blowpipe road (6), the pipeline of re-blowing (7), curing tube (8), lance tube (9), nitrogen balance jar (1) connects powder spraying pot (2) by the pipeline of re-blowing (7), curing tube (8), by main blowpipe road (5), help blowpipe road (6), lance tube (9) to connect spray gun (3); Powder spraying pot (2) discharging connects main blowpipe road (5), and spray gun (3) is arranged on smelting furnace (4) top.
8. smelt the lean slag specific equipment according to the described vanadium iron of claim 7, it is characterized in that the powder spraying pot discharging is provided with the discharging pneumavalve, curing tube is provided with the sulfuration pneumavalve, and main blowpipe road is provided with the main pneumavalve that blows, the pipeline of re-blowing is provided with the ftercompction pneumavalve, helps the setting of blowpipe road to help and blows pneumavalve; During winding-up powder spraying pot is carried out dynamic ftercompction, the constant voltage 0.28Mpa state of powder spraying pot when keeping winding-up effectively guarantees winding-up pressure reduction and winding-up effect.
9. smelt the lean slag specific equipments according to claim 7 or 8 described vanadium iron, it is characterized in that spray gun moves up and down, be provided with the moving range that limes superiors (10), smallest limit (11) limit spray gun, when normally jetting, spray gun is positioned at working position (12).
10. smelt the lean slag specific equipment according to claim 7 or 8 described vanadium iron, it is characterized in that the spray gun refractory materials is a magnalium chromium made from mixed materials.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106191633A (en) * | 2016-08-05 | 2016-12-07 | 江苏省冶金设计院有限公司 | A kind of high temperature smelting furnace and the method carrying out metallurgy with it |
| CN111101052A (en) * | 2019-12-18 | 2020-05-05 | 许益波 | Ferrovanadium smelting furnace |
| CN111218557A (en) * | 2020-03-02 | 2020-06-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Casting method of ferrovanadium alloy |
| CN111411231A (en) * | 2020-05-20 | 2020-07-14 | 攀钢集团北海特种铁合金有限公司 | Automatic blowing and spraying device for ferrovanadium refining |
| CN113943872A (en) * | 2021-09-22 | 2022-01-18 | 河钢承德钒钛新材料有限公司 | Device and method for producing aluminum-based intermediate alloy by aluminothermic reduction method |
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| CN202030809U (en) * | 2011-01-21 | 2011-11-09 | 河北钢铁股份有限公司承德分公司 | Special equipment for cleaning slag of ferrovanadium smelting |
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| CN202030809U (en) * | 2011-01-21 | 2011-11-09 | 河北钢铁股份有限公司承德分公司 | Special equipment for cleaning slag of ferrovanadium smelting |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191633A (en) * | 2016-08-05 | 2016-12-07 | 江苏省冶金设计院有限公司 | A kind of high temperature smelting furnace and the method carrying out metallurgy with it |
| CN106191633B (en) * | 2016-08-05 | 2018-01-02 | 江苏省冶金设计院有限公司 | A kind of high temperature smelting furnace and with its carry out metallurgy method |
| CN111101052A (en) * | 2019-12-18 | 2020-05-05 | 许益波 | Ferrovanadium smelting furnace |
| CN111101052B (en) * | 2019-12-18 | 2021-07-06 | 江苏中钒新材料科技有限公司 | Ferrovanadium smelting furnace |
| CN111218557A (en) * | 2020-03-02 | 2020-06-02 | 攀钢集团攀枝花钢铁研究院有限公司 | Casting method of ferrovanadium alloy |
| CN111218557B (en) * | 2020-03-02 | 2021-06-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Casting method of ferrovanadium alloy |
| CN111411231A (en) * | 2020-05-20 | 2020-07-14 | 攀钢集团北海特种铁合金有限公司 | Automatic blowing and spraying device for ferrovanadium refining |
| CN113943872A (en) * | 2021-09-22 | 2022-01-18 | 河钢承德钒钛新材料有限公司 | Device and method for producing aluminum-based intermediate alloy by aluminothermic reduction method |
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Application publication date: 20110511 |