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Copper-nickel sludge resource recycling process

A technology of copper sludge and sludge, which is applied in the field of copper-nickel sludge resource recycling technology, can solve the problems of long nickel recovery process, low overall recovery rate, increased production cost, etc., achieve priority efficient recovery and improve recovery rate Effect

Active Publication Date: 2022-02-01
ZHAOQING FEINAN METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet process is relatively simple, and the treatment of copper-nickel sludge is not thorough enough. The waste salt and waste residue produced are hazardous waste and need to be treated separately, which increases production costs
There are many problems in the pyrotechnic process, such as long nickel recovery process, scattered resources, and low overall recovery rate.

Method used

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  • Copper-nickel sludge resource recycling process
  • Copper-nickel sludge resource recycling process
  • Copper-nickel sludge resource recycling process

Examples

Experimental program
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Effect test

Embodiment 1

[0090] Please refer to figure 1 with figure 2 , the present embodiment provides a copper-nickel sludge resource recycling process, including:

[0091] The dry basis of copper-containing sludge contains 15% copper, 2% nickel, 0.5% tin, and a small amount of precious metals. Treated by fire method. After the copper-containing sludge is dried to about 50% water content through the pretreatment process, it is mixed with waste salt, desulfurized gypsum, scrap iron sludge and other materials, and then pretreated (after brick making or sintering) and other raw and auxiliary materials (reduction Carbon concentrate, quartz stone, limestone, etc.) enter the smelting treatment process together for reduction smelting or molten pool smelting. This process mainly occurs the solidification of the above-mentioned sulfur to form a matte phase, iron, silicon, calcium, sodium, etc. solidify into the slag phase, and produce blister copper, matte, slag and soot, and the matte is used for blowi...

Embodiment 2

[0095] This embodiment provides a recycling process for copper-nickel sludge resources, including:

[0096] Copper-containing sludge contains 5% copper, 8% nickel and 0.5% tin on a dry basis, and also contains trace amounts of precious metals. Treated by wet process. Sulfuric acid is used for countercurrent leaching. After neutralization and purification to remove impurities such as iron and aluminum, the leaching solution is extracted and back-extracted to obtain copper sulfate solution or copper sulfate crystals. After a small amount of copper, iron, etc., nickel extraction and stripping are carried out to obtain a high-purity nickel sulfate solution, which is used for further evaporation and crystallization to prepare refined nickel sulfate products. After neutralization and precipitation, the final raffinate is evaporated and concentrated. Waste salt is obtained; various leaching slags, precipitation slags, and impurity-removing slags obtained in the whole process are all...

Embodiment 3

[0098] This embodiment provides a recycling process for copper-nickel sludge resources, which differs from Embodiment 1 only in that:

[0099] After the copper anode plate and refining slag are obtained by refining, the refining slag is not distinguished, and the refining slag is directly subjected to reduction smelting or molten pool smelting. In the wet process of copper resource recovery, only the copper anode plate is electrolytically refined.

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Abstract

The application relates to a copper-nickel sludge resource recycling process, which belongs to the technical field of resource recovery and treatment. A process for recycling copper-nickel sludge resources, comprising: dividing the copper-nickel sludge into copper-containing sludge or nickel-containing sludge according to the copper content and nickel content. Nickel-containing sludge is treated by wet process to obtain waste residue, waste salt, copper sulfate and nickel sulfate. The waste slag, waste salt and copper-containing sludge obtained through wet process treatment are all treated by pyrotechnic process, including: pretreatment of materials, smelting treatment to obtain waste slag, copper products and flue gas. The flue gas is processed to obtain products, waste residue, waste salt and waste sludge. The waste slag, waste salt, and waste sludge obtained in the pyrotechnic process system are returned to the pyroprocess process system for treatment. The process combines the wet process and the pyrotechnic process to realize closed-loop operation, harmless treatment of all wastes, and increase the recovery rate of nickel and copper.

Description

technical field [0001] The present application relates to the technical field of resource recovery and treatment, and in particular to a copper-nickel sludge resource recycling process. Background technique [0002] At present, the treatment of copper-nickel sludge can be generally divided into wet process and pyrotechnic process. The wet process is relatively simple, and the treatment of copper-nickel sludge is not thorough enough. The waste salt and waste residue produced are hazardous waste and need to be treated separately, which increases production costs. There are many problems in the pyrotechnic process, such as long nickel recovery process, scattered resources, and low overall recovery rate. Contents of the invention [0003] In view of the deficiencies in the prior art, the purpose of the embodiment of the present application is to provide a copper-nickel sludge resource recycling process to realize the harmlessness of the copper-nickel sludge treatment process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B23/00C22B15/00
CPCC22B7/006C22B7/001C22B23/04C22B15/0028Y02P10/20
Inventor 俞挺刘小文周兆安李俊毛谙章李加兴曾小明
Owner ZHAOQING FEINAN METAL
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