Comprehensive recovery method for valuable metal in copper-cadmium slag

A valuable metal and recovery method technology, applied in the improvement of process efficiency, photography technology, instruments and other directions, can solve the problems of increasing extraction and separation technology, incomplete separation, low recovery rate, etc., to strengthen the acid leaching process and shorten the leaching process. time, the effect of simplifying the process

Inactive Publication Date: 2017-06-13
六盘水中联工贸实业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process only improves and perfects the traditional process, adding the extraction and separation technology of Cu, without considering the influence of other impurities or residual oxidants in the copper cadmium slag leaching solution on the extraction and separation, while still using high and low temperature zinc for Co, Ni, and Cd. Therefore, the separation of Co, Ni, and Cd is still not complete, and it is easy to cause a large amount of metal

Method used

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  • Comprehensive recovery method for valuable metal in copper-cadmium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) After mixing the copper and cadmium slag with sulfuric acid solution, add it to the reaction kettle, control the temperature at 120℃, add the oxidant hydrogen peroxide, adjust the pressure to 0.5MPa, react for 1h and discharge, and separate the solid and liquid to obtain Cu, Zn, Cd , Ni, Co, Fe acid leaching solution, the leaching rate of the acid leaching solution Cu, Zn, Cd, Ni, Co all reach more than 98%; the concentration of the sulfuric acid solution is 200g / L; the added amount of hydrogen peroxide 4% of the weight of the copper-cadmium slag; the liquid-solid mass ratio of the copper-cadmium slag and the sulfuric acid solution is 3:1;

[0061] (2) The Cu, Zn, Cd, Ni, Co, Fe acid leaching solution obtained in step (1) is subjected to copper extraction and separation and recovery, and copper extraction agent is used to extract and separate copper under certain extraction conditions to obtain copper extraction liquid And copper-containing organic phase; the copper-co...

Embodiment 2

[0067] (1) After mixing the copper and cadmium slag with sulfuric acid solution, add it to the reactor, control the temperature at 150℃, add the oxidant hydrogen peroxide, adjust the pressure to 0.8MPa, react for 2h, discharge, and separate the solid and liquid to obtain Cu, Zn, Cd , Ni, Co, Fe acid leaching solution, the leaching rate of the acid leaching solution Cu, Zn, Cd, Ni, Co all reach more than 98%; the concentration of the sulfuric acid solution is 150g / L; the added amount of hydrogen peroxide It is 6% of the weight of the copper cadmium slag; the liquid-solid mass ratio of the copper cadmium slag and the sulfuric acid solution is 4:1;

[0068] (2) The Cu, Zn, Cd, Ni, Co, Fe acid leaching solution obtained in step (1) is subjected to copper extraction and separation and recovery, and copper extraction agent is used to extract and separate copper under certain extraction conditions to obtain copper extraction liquid And copper-containing organic phase; the copper-contain...

Embodiment 3

[0074] (1) After mixing the copper and cadmium slag with sulfuric acid solution, add it to the reaction kettle, control the temperature at 180℃, add the oxidant hydrogen peroxide, adjust the pressure to 1.2MPa, react for 3h and discharge, after solid-liquid separation, to obtain Cu, Zn, Cd , Ni, Co, Fe acid leaching solution, the leaching rate of the acid leaching solution Cu, Zn, Cd, Ni, Co is above 98%; the concentration of the sulfuric acid solution is 100g / L; the added amount of hydrogen peroxide 8% of the weight of the copper-cadmium slag; the liquid-solid mass ratio of the copper-cadmium slag and the sulfuric acid solution is 5:1;

[0075] (2) The Cu, Zn, Cd, Ni, Co, Fe acid leaching solution obtained in step (1) is subjected to copper extraction and separation and recovery, and copper extraction agent is used to extract and separate copper under certain extraction conditions to obtain copper extraction liquid And copper-containing organic phase; the copper-containing organ...

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Abstract

The invention discloses a comprehensive recovery method for valuable metal in copper-cadmium slag. The copper-cadmium slag serves as a raw material, Cu, Zn, Cd, Ni and Co in the slag are efficiently recycled through an all-wet technology of oxygen pressure sulfuric acid leaching and sequential extraction, metal covered with the copper-cadmium slag is fully exposed in acid through a pressurized high-temperature oxidation effect, the acid leaching process is reinforced, reasonable process steps and process parameters are adjusted, tendency distribution of all metal is controlled, the influences of Ni, Co, Fe and other elements in the slag on separation and extraction of Cu, Zn and Cd are avoided, and the metal leaching rate and recovery rate are increased. Meanwhile, waste liquid generated in the whole process course serves as a leaching agent to return to carry out leaching, so that environmental pollution is avoided. Compared with the prior art, the process flow is shortened, the leaching time is shortened, the leaching cost is reduced, the energy consumption in the whole process course is reduced, and the beneficial effects of high efficiency, environmental friendliness and low cost are achieved.

Description

Technical field [0001] The invention relates to a method for recovering valuable metals, in particular to a method for comprehensively recovering valuable metals in copper-cadmium slag. Background technique [0002] Copper cadmium slag is a large amount of waste slag produced by the removal of copper and cadmium in the zinc wet production purification system. Every 10,000 tons of electro-zinc produced approximately 1,300 tons of copper cadmium slag. This type of slag generally contains more than 0.5% Cu, more than 2% Cd, more than 0.2% Ni, more than 0.03% Co, and more than 40% Zn, which has a very high comprehensive recycling value. There are two main processes for recovering valuable metals from copper and cadmium slag, namely, fire process and wet process. The pyrotechnical process is mature, but the energy consumption is relatively high, and higher-priced coking coal is required, and equipment for recovering ash and purifying gas is required to process the flue gas, so the in...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C25C1/12C22B23/00C22B17/00C25C1/16
CPCC22B7/007C22B15/0071C22B15/0084C22B17/04C22B23/043C22B23/0461C25C1/12C25C1/16Y02P10/20
Inventor 钟波刘安荣钟思河王振杰罗玉德
Owner 六盘水中联工贸实业有限公司
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