CN109569893B - Flotation method for recovering nickel and copper metal from electric furnace nickel slag - Google Patents
Flotation method for recovering nickel and copper metal from electric furnace nickel slag Download PDFInfo
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- CN109569893B CN109569893B CN201811281131.6A CN201811281131A CN109569893B CN 109569893 B CN109569893 B CN 109569893B CN 201811281131 A CN201811281131 A CN 201811281131A CN 109569893 B CN109569893 B CN 109569893B
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- nickel
- copper
- flotation
- nickel slag
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 79
- 239000002893 slag Substances 0.000 title claims abstract description 52
- 238000005188 flotation Methods 0.000 title claims abstract description 38
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 28
- 239000010949 copper Substances 0.000 title claims abstract description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 12
- 239000012141 concentrate Substances 0.000 claims abstract description 29
- 229910000570 Cupronickel Inorganic materials 0.000 claims abstract description 28
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000002000 scavenging effect Effects 0.000 claims abstract description 18
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 229910000365 copper sulfate Inorganic materials 0.000 claims abstract description 11
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000004088 foaming agent Substances 0.000 claims abstract description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012190 activator Substances 0.000 claims abstract description 5
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 claims abstract description 5
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229940116411 terpineol Drugs 0.000 claims abstract description 5
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 3
- 239000010665 pine oil Substances 0.000 claims description 11
- 239000006260 foam Substances 0.000 claims description 10
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000010408 sweeping Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 2
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 abstract description 8
- 239000012991 xanthate Substances 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- 229910052742 iron Inorganic materials 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- -1 copper metals Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
- B03D1/025—Froth-flotation processes adapted for the flotation of fines
Abstract
The invention discloses a flotation method for recovering nickel and copper metal from electric furnace nickel slag, which comprises the steps of crushing and grinding, quick flotation, rough concentration, twice fine concentration and twice scavenging, wherein the nickel slag is ground to 70-80% of minus 37 mu m through ore grinding, the flotation concentration is controlled to 40-45%, and a regulator of sodium silicate, an activator of copper sulfate, a collector of xanthate and a foaming agent of terpineol oil are added for flotation, so that final copper-nickel mixed concentrate with nickel content of more than 4% and copper content of more than 4% can be obtained. The whole process of the invention has less equipment, simple process flow, low treatment cost and easy implementation of on-site industrial production; the method can reduce the nickel slag of the waste electric furnace stockpiled for years, change waste into valuable, realize the recycling of green economy and generate good social benefit; meanwhile, the flotation technology is applied to the new field of nickel slag for the first time in China.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and relates to a flotation method for recovering nickel and copper metal from nickel slag of an electric furnace.
Background
The nickel slag is FeO and SiO formed in the smelting process of nickel metal2、Al2O3And MgO, etc. are the main chemical components of the molten material, and the granulated slag is formed after cooling, and contains various valuable metals such as Ni, Cu, Co, and Fe. In recent years, the rapid development of industry has increased the production of nickel slag, and if a large amount of nickel slag can not be effectively utilized, a large amount of land is occupied, metal resources are wasted, and the ring is seriously pollutedAnd (4) environmental conditions.
According to the characteristics of the components of the nickel slag, a lot of researches on the recycling comprehensive utilization of the nickel slag are carried out at home and abroad, the nickel slag is used as an underground filling cementing material and a building material for manufacturing cement concrete aggregate, producing building blocks, microcrystalline glass and the like, the research and the utilization are relatively mature, the reduction of the nickel slag can be realized, but valuable metals such as nickel, copper, iron, cobalt and the like contained in the nickel slag are not fully utilized and recovered.
In the process of recovering iron, the nickel slag can obtain iron ore concentrate with iron content of more than 70% by a combined mode of direct reduction and magnetic separation of carbon-containing pellets, but is still in a test stage, and is difficult to industrialize due to high smelting and fine grinding costs and low iron price.
The method is characterized in that the nickel slag contains high content of Ni, Cu, Co and the like, the extraction is mainly carried out by an acid leaching method at present, the waste liquid discharge of the method is undoubtedly secondary pollution to the environment, and aiming at the condition, the flotation method which is pollution-free, low in cost and easy to industrialize is invented for recovering the valuable nickel and copper metals in the nickel slag of the electric furnace, so that the green circular economic development is realized.
Disclosure of Invention
The invention aims to provide a flotation method for recovering nickel and copper metal from nickel slag of an electric furnace aiming at the problems in the prior art.
The specific technical scheme of the invention is as follows:
a flotation method for recovering nickel and copper metal from electric furnace nickel slag comprises the following steps:
crushing and grinding: crushing, grinding and mixing nickel slag, wherein the grinding fineness is-37 mu m and accounts for 70-80% of the total mass of the nickel slag, and the concentration of the nickel slag ore pulp is 40-45%;
quick flotation: feeding nickel slag ore pulp into a flotation tank, adding 800-1000g/t of regulator sodium silicate, 70-80g/t of activator copper sulfate, 80-100g/t of collecting agent butyl xanthate and 30-40g/t of foaming agent pine oil, and performing rapid flotation on the nickel slag ore pulp to obtain copper-nickel bulk concentrate I and tailings I;
roughing: adding 40-50g/t of activator copper sulfate, 100-120g/t of collecting agent butyl xanthate and 30-40g/t of foaming agent terpineol oil into the tailings I, and performing rough separation to obtain rough and fine foams I and tailings II;
selecting: carrying out two times of concentration operation on the rough and fine foam I to obtain copper-nickel bulk concentrate II and concentrated middlings, and returning the concentrated middlings obtained by each time of concentration operation to the previous layer of operation;
sweeping: adding 30-40g/t of collecting agent butyl xanthate and 5-10g/t of foaming agent terpineol oil, performing scavenging operation on the tailings II for two times to obtain final flotation tailings and scavenging middlings, and returning the scavenging middlings obtained by each scavenging operation to the previous layer of operation;
merging: and combining the copper-nickel bulk concentrate I and the copper-nickel bulk concentrate II to obtain the final copper-nickel bulk concentrate.
The invention has the following beneficial effects:
the method adopts the flotation technology to recover the nickel and copper with high value in the nickel slag to produce the copper-nickel bulk concentrate, promotes the reduction of the nickel slag piled for years, and generates good economic benefit and social benefit.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is further illustrated with reference to figure 1 and the specific examples.
Example 1
The nickel slag sample is taken from an old nickel slag mountain piled for years, the nickel slag contains 0.47% of nickel and 0.35% of copper, and the main chemical components of the nickel slag are shown in Table 1:
the main valuable metals in the nickel slag are nickel, copper and iron, but the iron exists mostly in the form of iron silicate, so that the flotation is difficult to recover.
The nickel slag is treated by adopting the following process steps:
crushing and grinding: crushing a nickel slag sample to 2mm, uniformly mixing, sampling 800.0g, feeding into a rod mill, grinding the nickel slag sample to 80% of minus 37 mu m, adjusting the concentration of ore pulp to 45%, and feeding into a flotation tank;
quick flotation: adding 800g/t of water glass, 80g/t of copper sulfate, 100g/t of xanthate and 30g/t of pine oil into a flotation tank for rapid flotation to obtain copper-nickel bulk concentrate I and tailings I containing 9.67% of nickel and 8.05% of copper;
roughing: adding 50g/t of copper sulfate, 100g/t of butyl xanthate and 30g/t of pine oil into the tailings I to perform roughing operation to obtain coarse and fine foams I and tailings II;
selecting: carrying out two-time concentration operation on the rough and fine foam I to obtain a copper-nickel bulk concentrate II containing 2.46% of nickel and 2.18% of copper and two concentrated middlings, and returning the concentrated middlings to the previous layer of operation in sequence;
sweeping: adding 40g/t of xanthate and 10g/t of foaming agent pine oil into the tailings II, performing scavenging operation twice to obtain final flotation tailings containing 0.19% of nickel and 0.12% of copper and two scavenging middlings, and returning the scavenging middlings to the previous layer of operation in sequence;
merging: and combining the copper-nickel bulk concentrate I and the copper-nickel bulk concentrate II to obtain the final copper-nickel bulk concentrate containing 6.39% of nickel and 5.37% of copper.
After the above steps, the test results are shown in table 2.
Example 2
The nickel slag sample is taken from another old nickel slag mountain piled for years, the nickel slag contains 0.38 percent of nickel and 0.39 percent of copper, and the main chemical components of the nickel slag are shown in the table 3:
the nickel slag is treated by adopting the following process steps:
crushing and grinding: crushing a nickel slag sample to 2mm, uniformly mixing, sampling 800.0g, feeding into a rod mill, grinding the nickel slag sample to 70% of minus 37 mu m, adjusting the concentration of ore pulp to 45%, and feeding into a flotation tank;
quick flotation: adding 800g/t of water glass, 75g/t of copper sulfate, 80g/t of xanthate and 40g/t of pine oil into a flotation tank for rapid flotation to obtain copper-nickel bulk concentrate I and tailings I, wherein the copper-nickel bulk concentrate I contains 6.03% of nickel and 7.46% of copper;
roughing: adding 40g/t of copper sulfate, 120g/t of xanthate and 35g/t of pine oil into the tailings I to perform roughing operation to obtain coarse and fine foams I and tailings II;
selecting: carrying out two-time concentration operation on the rough and fine foam I to obtain a copper-nickel bulk concentrate II containing 1.96% of nickel and 2.52% of copper and two concentration middlings, and returning the concentration middlings to the previous layer of operation in sequence;
sweeping: adding 40g/t of xanthate and 10g/t of foaming agent pine oil into the tailings II, performing scavenging operation twice to obtain final flotation tailings containing 0.19% of nickel and 0.15% of copper and two scavenging middlings, and returning the scavenging middlings to the previous layer of operation in sequence;
merging: and combining the copper-nickel bulk concentrate I and the copper-nickel bulk concentrate II to obtain the final copper-nickel bulk concentrate containing 4.17% of nickel and 5.21% of copper.
After the treatment of the steps, the test indexes are shown in Table 4.
Example 3
The invention is used for processing a batch of nickel slag containing 0.40 percent of nickel and 0.44 percent of copper by a slag selection plant which processes 3000 tons per day, and the process steps are as follows:
crushing and grinding: crushing nickel slag to be less than 100mm, uniformly mixing, feeding into a phi 5.8m multiplied by 5.8m semi-autogenous mill for ore grinding, mixing ore discharge of the semi-autogenous mill and ore discharge of a phi 5.5m multiplied by 9.5m ball mill, classifying by a cyclone, returning sand settled by the cyclone to the ball mill to form closed circuit ore grinding, and enabling overflow-37 mu m of the cyclone to account for 70 percent to enter into rapid flotation operation;
quick flotation: controlling the flotation concentration to be 45%, adding 1000g/t of water glass, 70g/t of copper sulfate, 80g/t of butyl xanthate and 40g/t of pine oil in a flotation tank, and performing rapid flotation to obtain copper-nickel bulk concentrate I and tailings I containing 5.34% of nickel and 7.70% of copper;
roughing: adding 40g/t of copper sulfate, 120g/t of xanthate and 30g/t of pine oil into the tailings I to perform roughing operation to obtain coarse and fine foams I and tailings II;
selecting: carrying out two-time concentration operation on the rough and fine foam I to obtain a copper-nickel bulk concentrate II containing 2.61% of nickel and 3.23% of copper and two concentrated middlings, and returning the concentrated middlings to the previous layer of operation in sequence;
sweeping: adding 40g/t of xanthate and 10g/t of foaming agent pine oil into the tailings II, performing scavenging operation twice to obtain final flotation tailings containing 0.20% of nickel and 0.16% of copper and two scavenging middlings, and returning the scavenging middlings to the previous layer of operation in sequence;
merging: and combining the copper-nickel bulk concentrate I and the copper-nickel bulk concentrate II into the final copper-nickel bulk concentrate.
After the treatment of the steps, the production indexes are shown in Table 5.
Claims (1)
1. The flotation method for recovering nickel and copper metal from the nickel slag of the electric furnace is characterized by comprising the following steps:
crushing and grinding: crushing, grinding and mixing nickel slag, wherein the grinding fineness is-37 mu m and accounts for 70-80% of the total mass of the nickel slag, and the concentration of the nickel slag ore pulp is 40-45%;
quick flotation: feeding nickel slag ore pulp into a flotation tank, adding 800-1000g/t of regulator sodium silicate, 70-80g/t of activator copper sulfate, 80-100g/t of collecting agent butyl xanthate and 30-40g/t of foaming agent pine oil, and performing rapid flotation on the nickel slag ore pulp to obtain copper-nickel bulk concentrate I and tailings I;
roughing: adding 40-50g/t of activator copper sulfate, 100-120g/t of collecting agent butyl xanthate and 30-40g/t of foaming agent terpineol oil into the tailings I, and performing rough separation to obtain rough and fine foams I and tailings II;
selecting: carrying out two times of concentration operation on the rough and fine foam I to obtain copper-nickel bulk concentrate II and concentrated middlings, and returning the concentrated middlings obtained by each time of concentration operation to the previous layer of operation;
sweeping: adding 30-40g/t of collecting agent butyl xanthate and 5-10g/t of foaming agent terpineol oil, performing scavenging operation on the tailings II for two times to obtain final flotation tailings and scavenging middlings, and returning the scavenging middlings obtained by each scavenging operation to the previous layer of operation;
merging: and combining the copper-nickel bulk concentrate I and the copper-nickel bulk concentrate II to obtain the final copper-nickel bulk concentrate.
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| CN201811281131.6A CN109569893B (en) | 2018-10-30 | 2018-10-30 | Flotation method for recovering nickel and copper metal from electric furnace nickel slag |
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| CN116273443A (en) * | 2022-09-08 | 2023-06-23 | 西部矿业股份有限公司 | Beneficiation method for reducing copper and extracting iron from copper smelting slag |
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| US4024218A (en) * | 1975-11-03 | 1977-05-17 | Cominco Ltd. | Process for hydrometallurgical upgrading |
| US4283017A (en) * | 1979-09-07 | 1981-08-11 | Amax Inc. | Selective flotation of cubanite and chalcopyrite from copper/nickel mineralized rock |
| CN1281326C (en) * | 2005-02-04 | 2006-10-25 | 吉林吉恩镍业股份有限公司 | Nickel sulfide, copper tailings comprehensive recovery technology |
| CN102423728A (en) * | 2011-11-24 | 2012-04-25 | 昆明理工大学 | Flotation method for copper-containing nickel sulfide ore |
| CN102974466A (en) * | 2012-10-12 | 2013-03-20 | 金川集团股份有限公司 | Flotation method for improving recovery rate of low grade copper nickel ore |
| CN103433147B (en) * | 2013-08-16 | 2015-04-29 | 兰州大学 | Flotation reagent for copper-nickel sulfide ores |
| CN103834810B (en) * | 2014-03-11 | 2015-11-25 | 斯莱登（北京）化工科技有限公司 | A kind of method by copper nickel slag production of copper cobalt nickel collective concentrate |
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