CN104195277B - The method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag - Google Patents
The method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag Download PDFInfo
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- CN104195277B CN104195277B CN201410457262.0A CN201410457262A CN104195277B CN 104195277 B CN104195277 B CN 104195277B CN 201410457262 A CN201410457262 A CN 201410457262A CN 104195277 B CN104195277 B CN 104195277B
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Abstract
The present invention is a kind of method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, the raw material used is Pb-Zn deposits metallurgical slag, its TFe content is 1 ~ 40%, use molten point agent and reducing agent, use furnace equipment that Pb-Zn deposits metallurgical slag is carried out direct-reduction, iron powder after reduction, through shrend, magnetic separation separation scum, obtains iron powder; Does the mass percent of described molten point agent consist of: CaO? 0 ~ 5%; Fluorite 1 ~ 4%; Sodium carbonate 0 ~ 0.5%; Sodium sulfate 0 ~ 1%; SiO2?0 ~ 4%; Potassium chlorate 1 ~ 3%; Described reducing agent is selected from: the mixture of one or several compositions in coal, coke, petroleum coke, semi-coke; The 1 ~ 20% of the weight of the molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent. Extracting method of the present invention is reasonable in design, easy and simple to handle. Pb-Zn deposits metallurgical slag can be effectively utilized, while recycling iron powder, also Pb-Zn deposits metallurgical slag has been carried out innoxious process, be the recovery process of a kind of energy-conserving and environment-protective.
Description
Technical field
The present invention relates to a kind of method reclaiming reduced iron powder from metallurgical slag, particularly a kind of method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag.
Background technology
China is World Steel yield big country, and production capacity accounts for the 46% of whole world crude steel yield. But China's iron ore deposit basic characteristics are that lean ore is many, rich ore is few, national iron ore deposit in 2006 finds out that resource reserve is 60,700,000,000 tons, a large amount of iron ores remain a need for external import, carry out iron ore imports amount constantly to rise year after year, within 2013, the accumulative import volume of China's iron ore reaches 14.5 hundred million t, increases by 1.3 hundred million t on year-on-year basis, increases by 9.9%, seriously constrain the development of iron and steel enterprise, make the steel industry of China pay high cost depending on unduly of Foreign iron ore resource.
The application of plumbous zinc is very extensive, is the indispensable metal material of national economy. China is lead bullion manufacturing country maximum in the world and country of consumption. 2000 to 2013 zinc abstraction ability years were incremented by 11.4%, within 2013, reached about 5,000,000 tons. Plumbous cadmia is the solid slag produced in the process in lead-zinc smelting ore deposit, results from the plumbous pyrometallurgical smelting stage, usual iron content 20 ~ 30% and other trace meters in this solid metallurgical slag. The recycling of ferrum in Pb-Zn deposits metallurgical slag is met country's steel industry growth requirement, metallurgical slag can also be carried out harmless treatment simultaneously.
Summary of the invention
The technical problem to be solved is for the deficiencies in the prior art, it is provided that a kind of method is simple and convenient, recovering effect good, the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag of efficent use of resources.
The technical problem to be solved is to be realized by following technical scheme. The present invention is a kind of method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, it is characterized in, the raw material used is Pb-Zn deposits metallurgical slag, its TFe content is 1 ~ 40%, use molten point agent and reducing agent, using furnace equipment that Pb-Zn deposits metallurgical slag is carried out direct-reduction, the iron powder after reduction, through shrend, magnetic separation separation scum, obtains iron powder;The mass percent of described molten point agent consists of: CaO0 ~ 5%; Fluorite 1 ~ 4%; Sodium carbonate 0 ~ 0.5%; Sodium sulfate 0 ~ 1%; SiO20 ~ 4%; Potassium chlorate 1 ~ 3%; Described reducing agent is selected from: the mixture of one or several compositions in coal, coke, petroleum coke, semi-coke; The 1 ~ 20% of the weight of the molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent.
In the technical scheme of the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag of the present invention, it is preferred that technical scheme or technology is characterized in that
1, the preferred mass percentage ratio of described molten point agent consists of: CaO0.1 ~ 5%; Fluorite 1 ~ 4%; Sodium carbonate 0.05 ~ 0.5%; Sodium sulfate 0.05 ~ 1%; SiO20.1 ~ 4%; Potassium chlorate 1 ~ 3%. It is preferred that the mass percent of molten point of agent consist of: CaO1 ~ 3%; Fluorite 2 ~ 3%; Sodium carbonate 0.1 ~ 0.3%; Sodium sulfate 0.2 ~ 0.6%; SiO21 ~ 2%; Potassium chlorate 1.5 ~ 2.0%. The mass percent of most preferred molten point agent consists of: CaO2%; Fluorite 2.5%; Sodium carbonate 0.2%; Sodium sulfate 0.4%; SiO21.5%; Potassium chlorate 1.8%.
2. the reduction temperature described in is preferably: 500 ~ 2000 DEG C. It is preferred that reduction temperature be: 800 ~ 1200 DEG C. The preferred recovery time is: 0.5 ~ 5 hour.
3. the furnace equipment described in can use: tunnel cave, rotary kiln or fuming kiln or other conventional reduced form kiln furnace apparatus.
4. the iron powder after reduction can being carried out briquetting to use as conversion pig, the grain slag after shrend, magnetic separation separation uses as cement material or construction material, its advantage with high heating value and intensity.
5. the molten point agent described in, the addition of reducing agent are respectively preferably the 5 ~ 10% of the weight of Pb-Zn deposits metallurgical slag.
Compared with prior art, extracting method of the present invention is reasonable in design, easy and simple to handle. Pb-Zn deposits metallurgical slag can be effectively utilized, while recycling iron powder, also Pb-Zn deposits metallurgical slag has been carried out innoxious process, be the recovery process of a kind of energy-conserving and environment-protective.
Detailed description of the invention
The concrete technical scheme of the present invention described further below, in order to those skilled in the art is further understood that the present invention, and does not constitute the restriction to its right.
Embodiment 1, a kind of method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, the raw material used is Pb-Zn deposits metallurgical slag, its TFe content is 1 ~ 40%, use molten point agent and reducing agent, using furnace equipment that Pb-Zn deposits metallurgical slag is carried out direct-reduction, the iron powder after reduction, through shrend, magnetic separation separation scum, obtains iron powder; The mass percent of described molten point agent consists of: fluorite 1 ~ 4%; Sodium carbonate 0.5 ~ 0.5%; Sodium sulfate 0.05 ~ 1%; SiO20.1 ~ 4%; Potassium chlorate 1 ~ 3%; Described reducing agent is selected from: the mixture of one or several compositions in coal, coke, petroleum coke, semi-coke; The 1 ~ 20% of the weight of the molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent.
Embodiment 2, a kind of method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, the raw material used is Pb-Zn deposits metallurgical slag, its TFe content is 1 ~ 40%, use molten point agent and reducing agent, using furnace equipment that Pb-Zn deposits metallurgical slag is carried out direct-reduction, the iron powder after reduction, through shrend, magnetic separation separation scum, obtains iron powder; The mass percent of described molten point agent consists of: fluorite 1 ~ 4%; Potassium chlorate 1 ~ 3%; Described reducing agent is selected from: the mixture of one or several compositions in coal, coke, petroleum coke, semi-coke; The 1 ~ 20% of the weight of the molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent.
Embodiment 3, a kind of method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, the raw material used is Pb-Zn deposits metallurgical slag, its TFe content is 1 ~ 40%, use molten point agent and reducing agent, using furnace equipment that Pb-Zn deposits metallurgical slag is carried out direct-reduction, the iron powder after reduction, through shrend, magnetic separation separation scum, obtains iron powder; The mass percent of described molten point agent consists of: CaO0.1 ~ 5%; Fluorite 1 ~ 4%; Sodium sulfate 0.05 ~ 1%; SiO20.1 ~ 4%; Potassium chlorate 1 ~ 3%; Described reducing agent is selected from: the mixture of one or several compositions in coal, coke, petroleum coke, semi-coke; The 1 ~ 20% of the weight of the molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent.
Embodiment 4, a kind of method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, the raw material used is Pb-Zn deposits metallurgical slag, its TFe content is 1 ~ 40%, use molten point agent and reducing agent, using furnace equipment that Pb-Zn deposits metallurgical slag is carried out direct-reduction, the iron powder after reduction, through shrend, magnetic separation separation scum, obtains iron powder; The mass percent of described molten point agent consists of: CaO0.1 ~ 5%; Fluorite 1 ~ 4%; Sodium carbonate 0.05 ~ 0.5%; Sodium sulfate 0.05 ~ 1%; SiO20.1 ~ 4%; Potassium chlorate 1 ~ 3%; Described reducing agent is selected from: the mixture of one or several compositions in coal, coke, petroleum coke, semi-coke; The 1 ~ 20% of the weight of the molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent.
Embodiment 5, a kind of method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, the raw material used is Pb-Zn deposits metallurgical slag, its TFe content is 1 ~ 40%, use molten point agent and reducing agent, using furnace equipment that Pb-Zn deposits metallurgical slag is carried out direct-reduction, the iron powder after reduction, through shrend, magnetic separation separation scum, obtains iron powder; The mass percent of described molten point agent consists of: CaO1 ~ 3%; Fluorite 2 ~ 3%; Sodium carbonate 0.1 ~ 0.3%; Sodium sulfate 0.2 ~ 0.6%; SiO21 ~ 2%; Potassium chlorate 1.5 ~ 2.0%; Described reducing agent is selected from: the mixture of one or several compositions in coal, coke, petroleum coke, semi-coke; The 5 ~ 10% of the weight of the molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent.
Embodiment 6, a kind of method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, the raw material used is Pb-Zn deposits metallurgical slag, its TFe content is 1 ~ 40%, use molten point agent and reducing agent, using furnace equipment that Pb-Zn deposits metallurgical slag is carried out direct-reduction, the iron powder after reduction, through shrend, magnetic separation separation scum, obtains iron powder; The mass percent of described molten point agent consists of: CaO2%; Fluorite 2.5%; Sodium carbonate 0.2%; Sodium sulfate 0.4%; SiO21.5%; Potassium chlorate 1.8%; Described reducing agent is selected from: the mixture of one or several compositions in coal, coke, petroleum coke, semi-coke; The 7% of weight, the 8% of the molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent.
Embodiment 7, in embodiment 1-6 in any method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, described reduction temperature is: 500 ~ 2000 DEG C, the recovery time: 0.5 ~ 5 hour.
Embodiment 8, in embodiment 1-6 in any method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, described reduction temperature is: 800 ~ 1200 DEG C, the recovery time: 1 ~ 3 hour.
Embodiment 9, in embodiment 1-6 in any method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, described reduction temperature is: 950 DEG C, the recovery time: 2 hours.Described furnace equipment is: tunnel cave, rotary kiln or fuming kiln. Iron powder after reduction being carried out briquetting use as conversion pig, the grain slag after shrend, magnetic separation separation uses as cement material or construction material.
Embodiment 10, a kind of methods experiment one reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag:
Taking 100Kg Pb-Zn deposits metallurgical slag, composition is as follows:
| TFe | Al2O3 | CaO | MgO | SiO2 |
| 26.50 | 7.47 | 14.6 | 2.49 | 21.5 |
By Pb-Zn deposits metallurgical slag pulverizing ,-200 order >=90%. Take CaO4.8Kg, fluorite 1.2Kg, sodium carbonate 0.6Kg, sodium sulfate 1.2Kg, SiO again24.8Kg, potassium chlorate 2.4Kg mixing composition composite fluxing agent. The smelting ground-slag ground, molten point agent, 200 order anchracite duff 15Kg are sufficiently mixed uniformly, load in reductive jar, then at reductive jar lid last layer coal dust, it is warming up to 1200 DEG C, it is incubated 4 hours, takes out after being cooled to 60 DEG C, as follows through magnetic separation separation post analysis result:
Reduzate result:
| Tfe | Mfe |
| 26.67 | 20.85 |
Magnetic Materials result:
| Tfe | Mfe |
| 85.85 | 72.43 |
Nonmagnetics result:
| Tfe | Mfe |
| 2.5 | 0.14 |
Embodiment 11, a kind of methods experiment two reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag:
Taking 100Kg Pb-Zn deposits metallurgical slag, composition is as follows:
| TFe | Al2O3 | CaO | MgO | SiO2 |
| 30.50 | 5.40 | 12.8 | 2.19 | 20.65 |
By Pb-Zn deposits metallurgical slag pulverizing ,-100 order >=90%. Take CaO4.8Kg, fluorite 1.2Kg, sodium carbonate 0.6Kg, sodium sulfate 1.2Kg, SiO again24.8Kg, potassium chlorate 2.4Kg mixing composition composite fluxing agent. The smelting ground-slag ground, molten point agent, 200 icteric sclera coal dust 5Kg are sufficiently mixed uniformly, in reductive jar, first spread 1mm thickness coal dust, reinstall mixed metallurgical slag, again at reductive jar lid last layer coal dust, it is warming up to 1230 DEG C, it is incubated 2 hours, takes out after being cooled to 60 DEG C, as follows through magnetic separation separation post analysis result:
Reduzate result:
| TFe | MFe |
| 31.56 | 28.95 |
Magnetic Materials result:
| TFe | MFe |
| 89.85 | 83.23 |
Nonmagnetics result:
| TFe | MFe |
| 3.9 | 0.24 |
Claims (10)
1. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag, it is characterized in that, the raw material used is Pb-Zn deposits metallurgical slag, its TFe content is 1～40%, use molten point agent and reducing agent, using furnace equipment that Pb-Zn deposits metallurgical slag is carried out direct-reduction, the iron powder after reduction, through shrend, magnetic separation separation scum, obtains iron powder; Described molten point of agent composition and account for the mass percent of raw material Pb-Zn deposits metallurgical slag respectively and be: CaO0～5%; Fluorite 1～4%; Sodium carbonate 0～0.5%; Sodium sulfate 0～1%; SiO20～4%; Potassium chlorate 1～3%; Described reducing agent is selected from: the mixture of one or several compositions in coal, coke, petroleum coke, semi-coke; The 1～20% of the weight of the molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent.
2. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag according to claim 1, it is characterised in that described molten point of agent composition and account for the mass percent of raw material Pb-Zn deposits metallurgical slag respectively and be: CaO0.1～5%; Fluorite 1～4%; Sodium carbonate 0.05～0.5%; Sodium sulfate 0.05～1%; SiO20.1～4%; Potassium chlorate 1～3%.
3. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag according to claim 1, it is characterised in that described molten point of agent composition and account for the mass percent of raw material Pb-Zn deposits metallurgical slag respectively and be: CaO1～3%; Fluorite 2～3%; Sodium carbonate 0.1～0.3%; Sodium sulfate 0.2～0.6%; SiO21～2%; Potassium chlorate 1.5～2.0%.
4. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag according to claim 1, it is characterised in that described molten point of agent composition and account for the mass percent of raw material Pb-Zn deposits metallurgical slag respectively and be: CaO2%;Fluorite 2.5%; Sodium carbonate 0.2%; Sodium sulfate 0.4%; SiO21.5%; Potassium chlorate 1.8%.
5. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag according to claim 1, it is characterised in that reduction temperature is: 500～2000 DEG C.
6. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag according to claim 1, it is characterised in that reduction temperature is: 800～1200 DEG C.
7. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag according to claim 1, it is characterised in that recovery time: 0.5～5 hour.
8. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag according to claim 1, it is characterised in that described furnace equipment is: tunnel cave, rotary kiln or fuming kiln.
9. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag according to claim 1, it is characterised in that the iron powder after reduction is carried out briquetting and uses as conversion pig, the grain slag after shrend, magnetic separation separation uses as construction material.
10. the method reclaiming reduced iron powder from Pb-Zn deposits metallurgical slag according to claim 1, it is characterised in that the 5～10% of the weight of the described molten addition respectively Pb-Zn deposits metallurgical slag dividing agent, reducing agent.
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|---|---|---|---|---|
| CN101787407A (en) * | 2010-02-02 | 2010-07-28 | 昆明理工大学 | Method for reducing and extracting copper smelting waste slag through microwave carbon heating |
| CN102094095A (en) * | 2011-01-29 | 2011-06-15 | 沈阳博联特熔融还原科技有限公司 | Method for quickly separating and directly reducing iron slag |
| CN102896039A (en) * | 2012-10-17 | 2013-01-30 | 衡南县旺宏粉末金属材料科技有限公司 | Preparation method for refining reduced iron from second zinc oxide industrial residues |
| CN103757170A (en) * | 2013-12-13 | 2014-04-30 | 金川集团股份有限公司 | Method for injection reduction extraction of iron from nickel smelting furnace slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787407A (en) * | 2010-02-02 | 2010-07-28 | 昆明理工大学 | Method for reducing and extracting copper smelting waste slag through microwave carbon heating |
| CN102094095A (en) * | 2011-01-29 | 2011-06-15 | 沈阳博联特熔融还原科技有限公司 | Method for quickly separating and directly reducing iron slag |
| CN102896039A (en) * | 2012-10-17 | 2013-01-30 | 衡南县旺宏粉末金属材料科技有限公司 | Preparation method for refining reduced iron from second zinc oxide industrial residues |
| CN103757170A (en) * | 2013-12-13 | 2014-04-30 | 金川集团股份有限公司 | Method for injection reduction extraction of iron from nickel smelting furnace slag |
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