Method for producing electrodeposited copper from polymetallic copper slag

A multi-metal, copper electrodeposited technology, applied in the improvement of process efficiency, photographic technology, instruments, etc., can solve the problem of not fully reflecting the economic benefits of valuable metals, difficult to control the quality of copper sulfate, and failing to reach high-quality products, etc. problems, to achieve the effect of high added value of products, elimination of secondary pollution, and high recovery rate

Active Publication Date: 2015-08-19
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology

[0003] At present, sulfuric acid leaching is used in the utilization of copper slag, and the patent 201110063556.1 "Process method for producing copper sulfate using copper slag under normal temperature and pressure" is treated by air oxidation The production of copper sulfate from the copper slag produced by the hydrometallurgy purification system utilizes the fact that all the copper in it is elemental copper formed during the replacement process, and the sulfuric acid is easy to leach after oxidation. However, the quality of copper sulfate is difficult to control in this process, which cannot reach The defects of high-grade products, and the use of copper slag to produce copper sulfate does not fully reflect the economic benefits of valuable metals. For the polymetallic copper slag involved in this patent (the copper in it is oxidized by sulfide, cuprous oxide, copper iron Compounds and other forms), there are problems of incomplete separation, low metal recovery rate, and secondary environmental pollution

Method used

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  • Method for producing electrodeposited copper from polymetallic copper slag

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Experimental program
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Effect test

Embodiment 1

[0020] Send 5kg of multi-metallic copper slag containing Cu7.56%, Co2.8%, Zn2.6%, Pb7.8%, Ni0.3%, and 6% moisture into the laboratory for φ0.5×3.2m rotation In the kiln, the oxygen is 3.5m 3 min -1 kg -1 For copper slag, the roasting temperature is controlled at 600°C, and the roasting time is 2 hours. The roasted ore is not cooled and spirally added to the leaching tank. The selective leaching agent is a solution with an initial mass fraction of 5%, and the liquid-solid weight ratio is 2:1. The leaching temperature 35°C, leaching time 6 hours, filtering to obtain leaching solution and leaching residue, the solute components and weight ratio of the leaching agent are: ammonia water (NH 3 ·H 2 O): 25%, ammonium persulfate ((NH 4 ) 2 S 2 o 8 ): 60%, ammonium chloride (NH 4 Cl): 15%, copper leaching rate 98%, zinc leaching rate 95%, cobalt leaching rate 0.1%, lead leaching rate 0.02%, nickel leaching rate 0.08%, the leaching solution uses LIX841 and 260# kerosene mixed or...

Embodiment 2

[0022] Send 5kg of multi-metallic copper slag containing Cu10.06%, Co5.4%, Zn1.8%, Pb15.3%, Ni0.1%, and 8% water into the laboratory for φ0.5×3.2m rotation In the kiln, the oxygen is 6.5m 3 min -1 kg -1 Copper slag, the roasting temperature is controlled at 800°C, the roasting time is 4h, the roasted ore is not cooled and spirally added to the leaching tank, the leaching agent is a solution with an initial mass fraction of 10%, the liquid-solid weight ratio is 4:1, and the leaching temperature is 45°C , the leaching time was 8 hours, filtered to obtain the leaching solution and leaching residue, the solute component and weight ratio of the leaching agent were: ammonia water (NH 3 ·H 2 O): 35%, ammonium persulfate ((NH 4 ) 2 S 2 o 8 ): 50%, ammonium chloride (NH 4 Cl): 15%, copper leaching rate 98.5%, zinc leaching rate 96.8%, cobalt leaching rate 0.08%, lead leaching rate 0.03%, nickel leaching rate 0.06%, the leaching solution is mixed with M5640 and 260# kerosene to ...

Embodiment 3

[0024] The solute components and weight ratio of the selective leaching agent are: ammonia water (NH 3 ·H 2 O): 35%, ammonium persulfate ((NH 4 ) 2 S 2 o 8 ): 60%, ammonium chloride (NH 4 Cl): 5%; the solute components and weight ratio of the mechanical strengthening leaching agent are: sulfuric acid (H 2 SO 4 ): 10%, ammonium persulfate (H 3 N 1 / 2 h 2 o 5 S 2 ): 50%, ammonium nitrite (NH 4 NO 2 ): 40%, the initial mass fraction of the selective leaching agent is a solution of 20%, the concentration of the strengthening leaching agent is 15%, and the remaining steps are the same as in Example 1.

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Abstract

The invention discloses a method for producing electrodeposited copper from polymetallic copper slag, which includes the following steps: the polymetallic copper slag is roasted to oxidize, so that the complex states of valuable metals in the polymetallic copper slag are transformed into oxides, changed into a state which can be selectively leached; leaching first adopts selective leaching agent to leach copper and zinc, the leachate is extracted, reextracted and electrodeposited, so that electrodeposited copper is obtained, and raffinate is vaporized and crystallized, so that zinc hydroxide is obtained; mechanical intensified leaching agent is then used for intensely leaching leaching residue, so that cobalt, nickel and the like in the leaching residue are leached, lead, iron and the like are enriched into the slag, the lead-rich slag is adopted as material for lead smelting, the leachate is extracted and reextracted, so that cobaltous sulfate or cobalt chloride is obtained, and if the nickel content in the leachate is overhigh, multi-stage extraction can be carried out to separate cobalt and nickel, so that nickel sulfate or nickel chloride is produced. The method can comprehensively recover a variety of metals, the leaching efficiency is high, the recovery rate is high, the method is environment-friendly, and is easy to implement, the method ensures that all the valuable metals in the polymetallic copper slag can be effectively separated and recycled, and the solid waste utilization rate can reach more than 99 percent.

Description

Technical field [0001] The present invention is a non -ferrous metal smelting, involving the comprehensive recycling of metal slag, and specifically involves a method of multi -metal copper slag production. Background technique [0002] With the lack of high -quality ore -rich metal resources with high quality and single metal, and the continuous downturn of the price of non -ferrous metal markets, the use of multi -metal difficulty to handle complex ore for non -ferrous metal smelting has become an effective way to improve the benefits of the non -ferrous metal smelting industry.Ni0.2-5%. [0003] At present, the process used by copper residue uses sulfuric acid immersion, patent 20110063556.1 "The process method of using copper sulfate by using copper sulfate at normal temperature" uses air oxidation methods to handle copper sulfate produced by the damp -zinc -refined system produced by the air oxidation method.It is a single copper formed by the replacement process. After oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C25C1/12
CPCY02P10/20
Inventor 鲁兴武何国才程亮陈文波李俞良邵传兵马爱军易超张恩玉曹桂银纪武仁贡大雷赵宏
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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