CN101545052B - Method for recovering nickel and copper from a nickel smelting waste slag - Google Patents
Method for recovering nickel and copper from a nickel smelting waste slag Download PDFInfo
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- CN101545052B CN101545052B CN2009101172146A CN200910117214A CN101545052B CN 101545052 B CN101545052 B CN 101545052B CN 2009101172146 A CN2009101172146 A CN 2009101172146A CN 200910117214 A CN200910117214 A CN 200910117214A CN 101545052 B CN101545052 B CN 101545052B
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- nickel
- waste slag
- smelting waste
- nickel smelting
- molten state
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to a method for recovering nickel and copper from a nickel smelting waste slag, including the steps as follows: a. heating the nickel smelting waste slag to a molten state or fetching the nickel smelting waste slag of the molten state to place in a thermal slag ladle directly; b. holding the nickel smelting waste slag in the molten state by heat insulation, at the same time infusing oxygen or air into the nickel smelting waste slag to react to generate solid residue to purify; c. shaking the thermal slag ladle for 30 to 40 minutes, then standing for 8 to 12 minutes; d. removing the solid residue; e. pouring out a precious metal layer of 4-6% of the total weight of the nickel smelting waste slag from the nickel smelting waste slag of the molten state, and thencooling; f. crushing and rubbing again, then a nickel and cobalt concentrative powder will be obtained through a floatation process. By means of the method of the invention, it is capable of recovering the nickel, cobalt and the like from the nickel smelting waste slag with high efficiency, so as to reuse the bulk industry solid wastes resource.
Description
Technical field
The present invention relates to a kind of method that from nickel smelting waste slag, reclaims nickel, cobalt.
Background technology
Nickel smelting waste slag is the smelting waste slag that nickel is smelted discharging in the production, is a kind of industrial solid castoff.Along with the development of producing, solid waste increases year by year, the nickel smelting waste slag of enormous amount is stored up in the open in smelting enterprise periphery slag field, except that minute quantity water supply mud factory makes additive (replacement iron ore), all the other overwhelming majority do not obtain utilizing, and have caused the serious environmental issue to enterprise's periphery ecotope, human settlement.
Measuring and calculating contains a large amount of irony elements and silicon-dioxide in the nickel smelting waste slag by analysis, contains metallic elements such as minor amount of nickel, copper, cobalt, lead, zinc in addition.With the about 1,600,000 tons waste of certain super-huge smelting enterprise is example, and wherein metal, nonmetal theoretical storage are: 620,000 tons of iron content, 4917 tons in nickel, 1864 tons of cobalts, 337 tons in lead, 5976 tons on zinc, 590,000 tons of silicon-dioxide.This is the huge wasting of resources, shows that also nickel smelting waste slag has huge value of exploiting and utilizing simultaneously, the difficult problem yet the comprehensive utilization of nickel smelting waste slag has at present become international in fact.
Summary of the invention
The purpose of this invention is to provide a kind of method that reclaims nickel, cobalt from nickel smelting waste slag, this method can make full use of depleted nickel smelting waste slag resource, avoids the wasting of resources and the environmental influence that bring thus, with the noble metal in the lower cost recovery waste.
For achieving the above object, the technical solution used in the present invention is:
A kind of method that reclaims nickel, cobalt from nickel smelting waste slag is characterized in that, comprises the steps:
A, the nickel smelting waste slag that nickel smelting waste slag is heated to molten state or directly gets molten state are positioned in the warm sludge bag;
B, insulation make nickel smelting waste slag keep molten state, thus simultaneously in nickel smelting waste slag aerating oxygen or air generate solid residue with purification and impurity removal;
C, concussion warm sludge bag 30-40 minute left standstill 8-12 minute then;
C, remove solid residue;
D, pour out the noble metal layers postcooling that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 4-6%;
E, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process.
Wherein behind step b, also to be incubated and make nickel smelting waste slag keep molten state, thereby in nickel smelting waste slag, feed chlorine simultaneously and generate solid residue with purification and impurity removal, the consumption of chlorine is a nickel smelting waste slag 0.1-0.25 cubic meter per ton, aeration time is 5-10 minute, or feeding chlorine meets the requirements until foreign matter content in nickel smelting waste slag.
Wherein the consumption of aerating oxygen is a nickel smelting waste slag 0.4-1 cubic meter per ton in step b, and aeration time is 5-10 minute, or aerating oxygen meets the requirements until foreign matter content in nickel smelting waste slag.
Wherein the consumption of bubbling air is a nickel smelting waste slag 2-5 cubic meter per ton in step b, and aeration time is 5-10 minute, or bubbling air meets the requirements until foreign matter content in nickel smelting waste slag.
Wherein use graphitized carbon cellulosic material gas duct to stretch in this warm sludge bag with ventilation.
Wherein the nickel smelting waste slag of molten state is meant that the nickel smelting waste slag temperature is at 1150-1300 ℃.
Wherein among the step e to broken, grind identical with the processing requirement of flotation with conventional nickel minerals or copper mine.
Wherein refrigerating work procedure is to pour noble metal layers at least one mould slowly cooling in the steps d.
Through repeatedly experimental results show that, the noble metal layers weight of the nickel smelting waste slag lower floor that employing the inventive method obtains accounts for the 4-6% of waste gross weight, but wherein the nickel of enrichment, cobalt account for the 60-83% of nickel in the waste, cobalt gross weight, at enriching quantity is 60% o'clock, nickel content 0.12% becomes 1.2% from waste, cobalt contents 0.16% becomes 1.6% from waste, thereby make and select concentrate by flotation process and become possibility, and it is 83% o'clock at enriching quantity, nickel, cobalt contents become 1.66%, 2.21% respectively, considerably beyond the minimum requirements of flotation process ore dressing.Adopt efficiently element such as the nickel in the comprehensive recovery nickel smelting waste slag, cobalt of method of the present invention, reached the purpose of large industrial solid castoff recycling.
Embodiment
The inventive method to the principle of purification and impurity removal of nickel smelting waste slag is:
Utilize furnace outer refining technology, high pressure oxygen, high pressure chlorine successively are blown into respectively in the nickel smelting waste slag of molten state, quantitatively it is carried out purification and impurity removal handles in batches, detrimental impurity (as aluminum oxide, magnesium oxide, calcium oxide, sulfide etc.) in the waste is fully reacted, promote to generate the less new compound of proportion by even, slight level concussion simultaneously, new compound floats on above the nickel smelting waste slag and separates out, and noble metal enrichments such as nickel, cobalt are deposited on lower floor, are beneficial to recovery.
Reaction equation is
FeS+3Fe
3O
4+ 5SiO
2+ 5O
2=5 (2FeOSiO
2)+SO
2↑ (under the high temperature fused state)
2Ca+O
2=2CaO (under the high temperature fused state)
2Mg+O
2=2MgO (under the high temperature fused state)
4Al+3O
2=2Al
2O
3(under the high temperature fused state)
2K+Cl
2=2KCl (under the high temperature fused state)
2Na+Cl
2=2NaCl (under the high temperature fused state)
Below for producing low nickel matte, hot waste is the chemical component table of the electric furnace warm sludge composition representative value of ferronickel slag:
Electric furnace warm sludge composition (%) in three months
Embodiment 1:
A, nickel smelting waste slag is heated to 1150 ℃ molten state;
B, insulation make nickel smelting waste slag remain on molten state, graphitized carbon cellulosic material gas duct is stretched into aerating oxygen in this warm sludge bag (high pressure oxygen) simultaneously thus generate solid residue with purification and impurity removal, the consumption of oxygen is 0.4 cubic metre of a nickel smelting waste slag per ton, and aeration time is 5 minutes;
C, even, slight level were shaken the warm sludge bag 30 minutes, left standstill then 8 minutes;
C, remove solid residue;
D, pour out noble metal layers slowly cooling in mould that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 4%;
E, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process, and the processing requirement of concrete fragmentation, grinding and flotation is with identical to conventional nickel minerals or copper mine.
Embodiment 2:
A, nickel smelting waste slag is heated to 1300 ℃ molten state;
B, insulation make nickel smelting waste slag remain on molten state, graphitized carbon cellulosic material gas duct is stretched into aerating oxygen in this warm sludge bag (high pressure oxygen) simultaneously thus generate solid residue with purification and impurity removal, the consumption of oxygen is 1 cubic metre of a nickel smelting waste slag per ton, and aeration time is 10 minutes;
C, even, slight level were shaken the warm sludge bag 40 minutes, left standstill then 12 minutes;
C, remove solid residue;
D, pour out noble metal layers slowly cooling in mould that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 6%;
E, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process, and the processing requirement of concrete fragmentation, grinding and flotation is with identical to conventional nickel minerals or copper mine.
Embodiment 3:
A, nickel smelting waste slag is heated to 1200 ℃ molten state;
B, insulation make nickel smelting waste slag remain on molten state, graphitized carbon cellulosic material gas duct is stretched into aerating oxygen in this warm sludge bag (high pressure oxygen) simultaneously thus generate solid residue with purification and impurity removal, the consumption of oxygen is 0.8 cubic metre of a nickel smelting waste slag per ton, and aeration time is 7 minutes;
C, even, slight level were shaken the warm sludge bag 35 minutes, left standstill then 10 minutes;
C, remove solid residue;
D, pour out noble metal layers slowly cooling in mould that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 5%;
E, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process, and the processing requirement of concrete fragmentation, grinding and flotation is with identical to conventional nickel minerals or copper mine.
Embodiment 4:
A, nickel smelting waste slag is heated to 1150 ℃ molten state;
B, insulation make nickel smelting waste slag remain on molten state, graphitized carbon cellulosic material gas duct is stretched into bubbling air (high-pressure air) in this warm sludge bag simultaneously thus generate solid residue with purification and impurity removal, the consumption of air is 2 cubic metres of nickel smelting waste slags per ton, and aeration time is 5 minutes;
C, even, slight level were shaken the warm sludge bag 30 minutes, left standstill then 8 minutes;
C, remove solid residue;
D, pour out noble metal layers slowly cooling in mould that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 4%;
E, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process, and the processing requirement of concrete fragmentation, grinding and flotation is with identical to conventional nickel minerals or copper mine.
Embodiment 5:
A, nickel smelting waste slag is heated to 1300 ℃ molten state;
B, insulation make nickel smelting waste slag remain on molten state, graphitized carbon cellulosic material gas duct is stretched into bubbling air (high-pressure air) in this warm sludge bag simultaneously thus generate solid residue with purification and impurity removal, the consumption of air is 5 cubic metres of nickel smelting waste slags per ton, and aeration time is 10 minutes;
C, even, slight level were shaken the warm sludge bag 40 minutes, left standstill then 12 minutes;
C, remove solid residue;
D, pour out noble metal layers slowly cooling in mould that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 6%;
E, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process, and the processing requirement of concrete fragmentation, grinding and flotation is with identical to conventional nickel minerals or copper mine.
Embodiment 6:
A, nickel smelting waste slag is heated to 1200 ℃ molten state;
B, insulation make nickel smelting waste slag remain on molten state, graphitized carbon cellulosic material gas duct is stretched into bubbling air (high-pressure air) in this warm sludge bag simultaneously thus generate solid residue with purification and impurity removal, the consumption of air is 3 cubic metres of nickel smelting waste slags per ton, and aeration time is 7 minutes;
C, even, slight level were shaken the warm sludge bag 35 minutes, left standstill then 10 minutes;
C, remove solid residue;
D, pour out noble metal layers slowly cooling in mould that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 5%;
E, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process, and the processing requirement of concrete fragmentation, grinding and flotation is with identical to conventional nickel minerals or copper mine.
Embodiment 7:
A, nickel smelting waste slag is heated to 1200 ℃ molten state;
B, insulation make nickel smelting waste slag remain on molten state, graphitized carbon cellulosic material gas duct is stretched into aerating oxygen in this warm sludge bag (high pressure oxygen) simultaneously thus generate solid residue with purification and impurity removal, the consumption of oxygen is 0.8 cubic metre of a nickel smelting waste slag per ton, and aeration time is 7 minutes;
C, insulation make nickel smelting waste slag keep molten state, and the while feeds chlorine (high pressure chlorine) thereby generates solid residue with purification and impurity removal in nickel smelting waste slag, and the consumption of chlorine is 0.2 cubic metre of a nickel smelting waste slag per ton, and aeration time is 8 minutes;
D, even, slight level were shaken the warm sludge bag 35 minutes, left standstill then 10 minutes;
E, remove solid residue;
F, pour out noble metal layers slowly cooling in mould that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 5%;
G, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process, and the processing requirement of concrete fragmentation, grinding and flotation is with identical to conventional nickel minerals or copper mine.
Embodiment 8:
A, nickel smelting waste slag is heated to 1250 ℃ molten state;
B, insulation make nickel smelting waste slag remain on molten state, graphitized carbon cellulosic material gas duct is stretched into bubbling air (high-pressure air) in this warm sludge bag simultaneously thus generate solid residue with purification and impurity removal, meet the requirements until foreign matter content;
C, insulation make nickel smelting waste slag keep molten state, generate solid residue with purification and impurity removal thereby feed chlorine simultaneously in nickel smelting waste slag, and the consumption of chlorine is 0.2 cubic metre of a nickel smelting waste slag per ton, and aeration time is 8 minutes, meets the requirements until foreign matter content;
D, even, slight level were shaken the warm sludge bag 32 minutes, left standstill then 9 minutes;
E, remove solid residue;
F, pour out noble metal layers slowly cooling in mould that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 5%;
G, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process, and the processing requirement of concrete fragmentation, grinding and flotation is with identical to conventional nickel minerals or copper mine.
Claims (6)
1. a method that reclaims nickel, cobalt from nickel smelting waste slag is characterized in that, comprises the steps:
A, the nickel smelting waste slag that nickel smelting waste slag is heated to molten state or directly gets molten state are positioned in the warm sludge bag;
B, insulation make nickel smelting waste slag keep molten state, thereby aerating oxygen or air generate solid residue with purification and impurity removal in nickel smelting waste slag simultaneously, also to be incubated and make nickel smelting waste slag keep molten state, thereby in nickel smelting waste slag, feed chlorine simultaneously and generate solid residue with purification and impurity removal, the consumption of chlorine is a nickel smelting waste slag 0.1-0.25 cubic meter per ton, and aeration time is 5-10 minute;
C, concussion warm sludge bag 30-40 minute left standstill 8-12 minute then;
C, remove solid residue;
D, pour out the noble metal layers postcooling that molten state nickel smelting waste slag lower floor accounts for nickel smelting waste slag gross weight 4-6%;
E, fragmentation are ground the back again and can be obtained nickel, cobalt concentrate powder by floatation process.
2. the method that reclaims nickel, cobalt from nickel smelting waste slag as claimed in claim 1 is characterized in that: wherein the consumption of aerating oxygen is a nickel smelting waste slag 0.4-1 cubic meter per ton in step b, and aeration time is 5-10 minute.
3. the method that reclaims nickel, cobalt from nickel smelting waste slag as claimed in claim 1 is characterized in that: wherein the consumption of bubbling air is a nickel smelting waste slag 2-5 cubic meter per ton in step b, and aeration time is 5-10 minute.
4. as any described method that from nickel smelting waste slag, reclaims nickel, cobalt in the claim 1 to 3, it is characterized in that: wherein use graphitized carbon cellulosic material gas duct to stretch in this warm sludge bag with ventilation.
5. as any described method that reclaims nickel, cobalt from nickel smelting waste slag in the claim 1 to 3, it is characterized in that: wherein the nickel smelting waste slag of molten state is meant that the nickel smelting waste slag temperature is at 1150-1300 ℃.
6. as any described method that reclaims nickel, cobalt from nickel smelting waste slag in the claim 1 to 3, it is characterized in that: wherein refrigerating work procedure is to pour noble metal layers at least one mould slowly cooling in the steps d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101172146A CN101545052B (en) | 2009-02-09 | 2009-02-09 | Method for recovering nickel and copper from a nickel smelting waste slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101172146A CN101545052B (en) | 2009-02-09 | 2009-02-09 | Method for recovering nickel and copper from a nickel smelting waste slag |
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| Publication Number | Publication Date |
|---|---|
| CN101545052A CN101545052A (en) | 2009-09-30 |
| CN101545052B true CN101545052B (en) | 2011-07-27 |
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| CN115386736B (en) * | 2022-08-04 | 2024-03-12 | 广东邦普循环科技有限公司 | Method for treating laterite-nickel ore by oxygen-enriched side-blown furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093756A (en) * | 1994-03-05 | 1994-10-19 | 邓小昌 | From copper slag, reclaim the method for metals such as tin, copper, lead, zinc |
| CN1157858A (en) * | 1996-10-17 | 1997-08-27 | 张铁铮 | Method for producing ultra low-carbon duriron |
| CN1603439A (en) * | 2004-11-15 | 2005-04-06 | 四川川投峨眉铁合金（集团）有限责任公司 | Production process for dry method extraction of nickel |
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2009
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093756A (en) * | 1994-03-05 | 1994-10-19 | 邓小昌 | From copper slag, reclaim the method for metals such as tin, copper, lead, zinc |
| CN1157858A (en) * | 1996-10-17 | 1997-08-27 | 张铁铮 | Method for producing ultra low-carbon duriron |
| CN1603439A (en) * | 2004-11-15 | 2005-04-06 | 四川川投峨眉铁合金（集团）有限责任公司 | Production process for dry method extraction of nickel |
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|---|---|
| CN101545052A (en) | 2009-09-30 |
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Granted publication date: 20110727 Termination date: 20140209 |