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Recovery and utilization method of valuable metal sludge containing copper, nickel and cobalt

A valuable metal, copper-nickel technology, which is applied in the field of comprehensive utilization of resources and circular economy, can solve the problems that the "acid leaching-extraction-electrowinning" process technology cannot be solved, and achieves accelerated leaching reaction speed, fast extraction speed, and treatment. powerful effect

Active Publication Date: 2015-07-08
聂源
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for recycling valuable metal sludge containing copper, nickel, cobalt, etc., to solve the technical problem of extracting valuable metals cleanly and efficiently from valuable metal sludge containing copper, nickel, cobalt, etc. The time-limited conventional "acid leaching-extraction-electrodeposition" process technology cannot solve the technical problems that can only be solved by using the "bacterial leaching-centrifugal extraction-swirl electrowinning combined technology" of this application

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  • Recovery and utilization method of valuable metal sludge containing copper, nickel and cobalt
  • Recovery and utilization method of valuable metal sludge containing copper, nickel and cobalt
  • Recovery and utilization method of valuable metal sludge containing copper, nickel and cobalt

Examples

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Effect test

Embodiment 1

[0053] Embodiment 1 "bacterial leaching-centrifugal extraction of copper sulfate+swirl electrodeposition copper-centrifugal extraction of nickel sulfate+swirl electrodeposition nickel" includes the following steps:

[0054] A. Bacterial immersion aid:

[0055] At room temperature, the slurry of the extract is mixed with an appropriate amount of 95%-98% sulfuric acid solution, bacterial auxiliary leaching agent and 30% hydrogen peroxide, and then the leachate is obtained. The pH value is controlled at 1.5-3.0, and the leachate is filtered. The first filtrate and the first filter residue are obtained; the volume ratio of the bacterial auxiliary leaching agent to the extract slurry is 0.005%-5.000%.

[0056] Bacterial auxiliary leaching agent is an optimized combination including one or several of the following bacteria, and the proportions after combination according to the cell concentration ratio per unit capacity are: 8%-12% of the genus Aureococcus, 45% of the genus Thiobaci...

Embodiment 2

[0069] Embodiment 2 "Bacteria-assisted immersion-swirl electrodeposited copper-centrifugal extraction of nickel sulfate", the process is as follows:

[0070] 1. Sludge pulping: Add electroplating sludge into the pulping tank, add water or circulating solution for stirring and pulping, so that the sludge and aqueous solution form a suspended slurry to facilitate leaching.

[0071] 2. Sulfuric acid dissolution and bacterial leaching aid: add an appropriate amount of 98% sulfuric acid and bacterial auxiliary leaching agent to the slurry at room temperature for stirring reaction and filtration to obtain the first filtrate and the first filter residue. The concentration of sulfuric acid in the leaching solution is adjusted at about 0.15%, and the pH value is controlled within 2.5; the composition of the bacterial auxiliary leaching agent: the genus Aureococcus with a cell concentration of 10%, the genus Thiobacillus with a cell concentration of 51%, and the genus with a cell concent...

Embodiment 3

[0078] Embodiment 3 "Bacterial leaching-centrifugal extraction of copper sulfate-swirl electrodeposited nickel", the process is as follows:

[0079] 1. Slag material grinding and slurrying: Grind the valuable metal slag material containing copper, nickel, cobalt, etc. to about 200 mesh and add it to the slurrying tank, add water or circulating solution for stirring and slurrying, so that the slag powder and the aqueous solution form a suspended slurry, for leaching.

[0080] 2. Sulfuric acid dissolution and bacterial leaching: add an appropriate amount of concentrated sulfuric acid solution, bacterial auxiliary leaching agent and 30% hydrogen peroxide to the slurry at room temperature for stirring reaction and filtration to obtain the first filtrate and the first filter residue. The concentration of sulfuric acid in the leaching solution is 0.2%, and the pH value is adjusted at 2.5-3.0 with soda; the composition of the bacterial auxiliary leaching agent: the cell concentration...

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Abstract

The invention provides a recovery and utilization method of valuable metal sludge containing copper, nickel and cobalt, namely, a combined technology of bacterial leaching aid-centrifugal extraction-cyclone electrowinning. The method comprises the following steps: A. sequentially mixing and stirring extract slurry with a sulfuric acid solution, a bacteria assisted leaching agent and hydrogen peroxide, and filtering to obtain filtrate and filter residue; B. centrifugally extracting the filtrate to obtain a high-purity copper sulfate solution, and carrying out cyclone electrowinning on the solution to obtain metal copper; and C. centrifugally extracting a water phase with impurities being removed and copper being extracted to obtain a high-purity nickel sulfate solution, and carrying out cyclone electrowinning on the solution to obtain metal nickel. According to the recovery and utilization method provided by the invention, the bacterial leaching aid, centrifugal extraction and cyclone electrowinning technologies are integrally operated; compared with the conventional technology of acid leaching-extracting-electrowinning, the recovery and utilization method has the advantages that the leaching efficiency of the valuable metal sludge containing copper, nickel and the like is stably improved from generally lower than 90% to higher than 95%, the acid consumption is decreased by more than 3%, the energy consumption is decreased by more than 10%, the occupation space is decreased by more than 60%, and a new way is provided for clean, efficient and comprehensive utilization of the valuable metal sludge containing copper, nickel, etc.

Description

technical field [0001] The invention relates to the fields of comprehensive utilization of resources and circular economy, in particular to a method for recycling valuable metal sludge containing copper, nickel and cobalt, that is, "combined technology of bacterial leaching-centrifugal extraction-swirl electrowinning". Background technique [0002] At present, the conventional "acid leaching-extraction-electrodeposition" technology can be used to treat low-grade copper oxide ore, secondary copper sulfide ore, and valuable metal sludge such as copper and nickel, such as electroplating sludge and smelting slag. Wet copper refining method. The process is as follows: After the copper ore is crushed (or other copper-containing materials), acid leaching is carried out, and then the copper sulfate or copper chloride solution is selectively extracted from the leachate with a special copper extractant, and then the sulfuric acid is extracted by back extraction. Copper or copper chlo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B3/18C22B3/26C22B3/22C25C1/12C25C1/08
CPCY02P10/20
Inventor 宋佩华聂萍宋原易龙生章捷黄树立马荣骏蔡固平伍伟清曾智勇廖武林杨金国孙勇郭学益周洪波李国欣张晶易宇
Owner 聂源
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