A comprehensive recovery method for preferentially extracting copper in hydrometallurgy of copper-bismuth-containing materials

A technology of hydrometallurgy and recovery method is applied in the direction of improving process efficiency, etc., to achieve high copper leaching rate, good leaching effect, and better copper-bismuth separation effect.

Active Publication Date: 2021-06-22
BACKFILL ENG LAB SHANDONG GOLD MINING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a simple and efficient comprehensive recovery method for preferentially extracting copper by hydrosmelting copper-bismuth materials, and to avoid copper pollution in the subsequent bismuth recovery process by preferentially immersing copper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Crushing and grinding the copper-bismuth-containing materials produced in the lead anode slime pyrometallurgy process, and then sieving to below 100 mesh.

[0023] (2) Weigh 160g of the sieved material, add 800ml of sulfuric acid solution with a NaCl concentration of 20g / L, and the initial sulfuric acid concentration is 100g / L; heat to 70°C for leaching reaction for 2h, detect the change of pH value during the leaching process, and pass periodic Dilute sulfuric acid solution is added to adjust the pH value of the leaching end point to about 3.0; after leaching is completed, solid-liquid separation is carried out to obtain leaching liquid and leaching residue.

[0024] After testing: the copper content of the leaching slag is 0.75%, and the copper leaching rate is 98.13%; the bismuth content of the leaching solution is lower than 1g / L.

[0025] (3) The leaching solution obtained in step (2) is tested for copper content and replaced with iron powder to recover copper,...

Embodiment 2

[0031] (1) Crushing and grinding the copper-bismuth-containing materials produced in the lead anode slime pyrometallurgy process, and then sieving to below 100 mesh.

[0032] (2) Weigh 160g of the sieved material, add 700ml of sulfuric acid solution with a NaCl concentration of 25g / L, and the initial sulfuric acid concentration is 100g / L; heat to 80°C for leaching reaction for 2h, detect the change of pH value during the leaching process, and pass periodic Supplement dilute sulfuric acid solution to adjust the pH value of the leaching end point to about 4.0; perform solid-liquid separation after leaching to obtain leaching liquid and leaching residue.

[0033] After testing: the copper content of the leaching slag is 0.66%, and the copper leaching rate is 98.81%; the bismuth content of the leaching solution is lower than 1g / L.

[0034] (3) The leaching solution obtained in step (2) is replaced with excess iron powder to recover copper.

[0035] (4), The leaching residue obtai...

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Abstract

The invention relates to a comprehensive recovery method for preferentially extracting copper in the wet smelting of copper-bismuth-containing materials. Add a sulfuric acid solution containing a small amount of NaCl for leaching, and then carry out solid-liquid separation to obtain the leachate and leaching residue; the leaching solution recovers copper, and the leaching residue is leached and dissolved with hydrochloric acid. Na 2 CO 3 Bismuth is hydrolyzed to obtain BiOCl for subsequent bismuth smelting, and the bismuth leached slag is returned to the pyro-smelting process to comprehensively recover metals including lead and silver. The invention solves the problem that the copper content in BiOCl is too high due to simultaneous leaching of bismuth and copper in the conventional wet smelting process of copper-containing bismuth slag.

Description

technical field [0001] The invention relates to a comprehensive recovery method for materials containing copper and bismuth, and belongs to the technical field of hydrometallurgy. Background technique [0002] In the field of comprehensive recovery of lead anode slime pyrometallurgy, since copper and bismuth are mainly enriched in the late slag of the silver separation furnace, the comprehensive treatment of this part of the copper and bismuth-containing materials is the key to the comprehensive recovery of valuable elements; The processing technology of bismuth material can be roughly divided into two types: pyrometallurgy and wet method, among which the hydrometallurgy process occupies the dominant position. [0003] As the prior art hydrometallurgy process for copper-bismuth-containing materials, it is mainly leached with hydrochloric acid, and bismuth and copper are simultaneously dissolved into the leaching solution, and then neutralized with NaOH to hydrolyze the bismu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B30/06C22B15/00C22B3/10C22B3/08
CPCC22B7/007C22B7/04C22B15/0071C22B30/06Y02P10/20
Inventor 高腾跃陈光辉黄发波徐超陈艳波秦广林蔡明明于淙权张文平
Owner BACKFILL ENG LAB SHANDONG GOLD MINING TECH CO LTD
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