Method for purifying and recovering valuable metal by copper electrolyte

A copper electrolyte and valuable metal technology, applied in the intersection of metallurgical engineering and environmental engineering, can solve the problems of high cost, high energy consumption, difficult recovery of valuable metals, etc., and achieve efficient recovery, low energy consumption, and reduced production costs. Effect

Active Publication Date: 2016-05-25
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the defects of high energy consumption, high cost and difficult recovery of valuable metals in the current copper elec

Method used

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  • Method for purifying and recovering valuable metal by copper electrolyte
  • Method for purifying and recovering valuable metal by copper electrolyte
  • Method for purifying and recovering valuable metal by copper electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Get 500ml of electrolyte in a copper smelter, the concentration of sulfuric acid is 289g / L, and other main elements and their contents are as follows:

[0031] Table 1 Main elements and concentration of copper electrolyte (g / L)

[0032]

[0033] After evaporating and concentrating the above electrolytic solution to 250ml, cool and crystallize and filter to obtain 29g copper sulfate pentahydrate. The copper concentration in the filtrate is about 60g / L, and the concentration of other main elements is doubled. Cu) was added to the filtrate at a ratio of 1.2, reacted at 80°C for 3 hours, and filtered to obtain the precipitation of copper sulfide and antimony sulfide and the filtrate for removing copper and antimony. The concentration was 97.8mg / L, the total recoveries of copper and antimony were 99.9% and 87.5%, respectively. Evaporate and concentrate the above-mentioned copper and antimony removal filtrate to a sulfuric acid concentration of 800g / L, then cool and stand...

Embodiment 2

[0035] Get 500ml of electrolyte in a copper smelter, the concentration of sulfuric acid is 267g / L, and other main elements and their contents are as follows:

[0036] Table 1 Main elements and concentration of copper electrolyte (g / L)

[0037]

[0038] After evaporating and concentrating the above electrolytic solution to 250ml, cool and crystallize and filter to obtain 30g copper sulfate pentahydrate. The copper concentration in the filtrate is about 64g / L, and the concentration of other main elements is doubled. Cu) was added to the filtrate at a ratio of 1.3, reacted at 80°C for 3 hours, and filtered to obtain the precipitation of copper sulfide and antimony sulfide and the filtrate for removing copper and antimony. The concentration was 90.8mg / L, the total recoveries of copper and antimony were 99.9% and 89.7%, respectively. Evaporate and concentrate the above-mentioned copper and antimony removal filtrate to a sulfuric acid concentration of 850g / L, then cool and stand...

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Abstract

The invention discloses a method for purifying and recovering valuable metal by copper electrolyte. The method comprises the following steps: (1) evaporating, crystallizing and filtering the copper electrolyte to recover copper sulfate; (2) adding arsenic sulfide slag into copper electrolysis filtrate, and filtering to recover copper sulfide and antimony sulfide after a reaction is finished; (3) evaporating, crystallizing and filtering the copper electrolysis filtrate to separate arsenic oxide and bismuth oxide; (4) selectively leaching and recovering bismuth in the step (3); (5) efficiently vulcanizing the copper electrolysis filtrate for deep arsenic removal; (6) performing diffusion dialysis on the copper electrolysis filtrate to separate and recover sulfuric acid; (7) recovering nickle in a diffusion dialysis stock solution by adopting a neutralization precipitation method. The method adopts a wet method in the whole process, is efficient, environment-friendly and energy-saving, and has better application value.

Description

technical field [0001] The invention belongs to the intersection field of metallurgical engineering and environmental engineering, and in particular relates to a method for copper electrolytic purification and recovery of valuable metals. Background technique [0002] At present, smelting enterprises all adopt the process of pyromelting-electrolytic refining to produce copper products. Because copper concentrates are generally associated with other elements, the composition of the electrolyte is complex and contains a large number of impurity ions that are not conducive to electrolysis, such as arsenic, antimony, bismuth, etc. These impurity ions will not only deposit on the cathode, but also form floating anode slime, which seriously affects the service life of the electrode plate and the quality of cathode copper. Therefore, the electrolyte needs to be purified before electrolysis. [0003] The traditional copper electrolyte purification method is electrowinning copper r...

Claims

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Application Information

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IPC IPC(8): C22B3/22C22B3/46C22B3/44C22B15/00C22B30/02C22B30/06C22B23/00
CPCC22B3/22C22B3/44C22B3/46C22B15/0086C22B15/0091C22B23/0469C22B30/02C22B30/06Y02P10/20
Inventor 柴立元蒋国民胡明王庆伟李青竹杨志辉高伟荣
Owner CENT SOUTH UNIV
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