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Process for extracting nickel from nickel sulfide material with low copper content

A technology of nickel sulfide and materials, which is applied in the field of extracting nickel from nickel sulfide materials with low copper content, can solve the problems of complex metal recovery process and high cost, and achieve the effect of simple leaching process route, low cost and high direct metal recovery rate

Inactive Publication Date: 2002-06-05
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process still uses one stage of pressure and one stage of normal pressure to realize the leaching and separation of nickel and copper. The process of recovering metals is relatively complicated and the cost is high.

Method used

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  • Process for extracting nickel from nickel sulfide material with low copper content
  • Process for extracting nickel from nickel sulfide material with low copper content

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] Composition (%) of the leached nickel concentrate used: Ni 66.27, Cu 2.65, Fe 2.32, Co0,85, S 23.75.

[0034] The pressure leaching conditions are as follows: take 100g of nickel concentrate, add 18g of sulfur, the leaching liquid-solid ratio is 6:1, the leaching temperature is 140°C, the oxygen partial pressure is 150kPa, and the reaction time is 3 hours.

[0035] Leaching rate (%)

example 2

[0037] Composition (%) of the leached nickel concentrate used: Ni 66.27, Cu 2.65, Fe 2.32, Co0,85, S 23.75.

[0038] The pressure leaching conditions are as follows: take 100g of nickel concentrate, add 26ml of concentrated sulfuric acid, the leaching liquid-solid ratio is 5:1, the leaching temperature is 145°C, the oxygen partial pressure is 200kPa, and the reaction time is 3.5 hours.

[0039] Leaching rate (%)

example 3

[0041] Composition (%) of the leached nickel concentrate used: Ni 66.27, Cu 2.65, Fe 2.32, Co0,85, S 23.75.

[0042] Leaching rate (%)

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Abstract

The nickel extracting process of the present invention relates to the one-stage pressurized leaching extraction of nickel from nickel concentrate with low copper content or high sulfur nickel concentrate separated through milling and floating procedure. The process features that under oxygenation and adding sulfur or sulfuric acid, and in 100-180 deg.c and oxygen pressure 50-300 KPa, nickel concentrate is one-step pressurized leached to complete the Ni, Co and Cu leaching process with Fe being fixed in slag. Nickel sulfate solution after liquid-solid separation may be used in production pure nickel sulfate or electrolyte while recovering Co, Cu and other valuable metals. The process is simple and high in production efficiency.

Description

(1) Technical field [0001] The invention discloses a method for extracting nickel from nickel sulfide material with low copper content, which relates to a method for extracting nickel with one-stage pressure leaching from nickel sulfide material with low copper content, such as nickel concentrate and nickel matte with low copper content. (2) Background technology [0002] At present, most of the nickel in the world is produced by using the nickel matte produced by the pyrometallurgical process by hydrometallurgical process. The commonly used processes for wet treatment of nickel matte are: 1) A combination of one stage of normal pressure leaching followed by one stage of pressure leaching. After the normal pressure leaching residue is slurried, it enters the autoclave through a pressure pump, and the pressurized leaching solution returns to normal pressure leaching for purification. In normal pressure leaching, the iron in the pressurized leaching solution is oxidized and pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08
CPCY02P10/20
Inventor 蒋开喜王海北刘大星何良菊王春林江顺崔学仲
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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