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Method for directly separating nickel from copper by wet processing of low-grade nickel matte

A technology for wet processing and matte nickel is applied in the field of metallurgy, which can solve the problems of low cobalt recovery rate, high energy consumption, and large amount of material circulation, and achieve the effects of saving process cost, reducing production energy consumption, and simple process flow.

Active Publication Date: 2018-03-09
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the whole production process, the amount of material circulation is large, the energy consumption is high, and the recovery rate of cobalt is low

Method used

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  • Method for directly separating nickel from copper by wet processing of low-grade nickel matte
  • Method for directly separating nickel from copper by wet processing of low-grade nickel matte
  • Method for directly separating nickel from copper by wet processing of low-grade nickel matte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Low nickel matte, an intermediate material produced in the pyrometallurgy process of a smelter in a nickel-copper-cobalt metallurgy process, its main components account for 24.95% by mass of nickel, 17.52% of copper, 27.2% of iron, 0.42% of cobalt, and 24.96% of sulfur . The direct separation of nickel-copper by the low nickel matte wet process specifically includes the following steps:

[0018] A. One-stage leaching: use sulfuric acid to conduct one-stage countercurrent leaching of low-matte nickel with a particle size of 160 mesh. During the leaching process, the liquid-solid ratio is controlled at 4:1, the temperature is 80°C, and the time is 4 hours. After one-stage leaching, filter to obtain nickel-cobalt-iron The primary leaching solution and the primary leaching slag whose main components are copper sulfide and precious metals enter the copper smelting system.

[0019] B. Two-stage leaching: Use the first-stage leaching solution obtained from the first-stage lea...

Embodiment 2

[0026] Low nickel matte, an intermediate material produced in the pyrometallurgy process of a nickel-copper-cobalt smelting process in a smelter, its main components account for 25.95% nickel, 16.52% copper, 30.2% iron, 0.50% cobalt, and 27.5% sulfur . The direct separation of nickel-copper by the low nickel matte wet process specifically includes the following steps:

[0027] A. One-stage leaching: use sulfuric acid to conduct one-stage countercurrent leaching of low-matte nickel with a particle size of 180 mesh. During the leaching process, the liquid-solid ratio is controlled at 5:1, the temperature is 90°C, and the time is 3 hours. After one-stage leaching, filter to obtain nickel-cobalt-iron The primary leaching solution and the primary leaching slag whose main components are copper sulfide and precious metals enter the copper smelting system.

[0028] B. Two-stage leaching: Use the first-stage leaching solution obtained from the first-stage leaching to carry out two-sta...

Embodiment 3

[0035] Low nickel matte, an intermediate material produced in the pyrometallurgy process of a nickel-copper-cobalt smelting process in a smelter, its main components account for 24.86% by mass of nickel, 16.4% of copper, 25.65% of iron, 0.43% of cobalt, and 25.81% of sulfur . The direct separation of nickel-copper by the low nickel matte wet process specifically includes the following steps:

[0036] A. One-stage leaching: Use sulfuric acid to conduct one-stage countercurrent leaching of low-matte nickel with a particle size of 100 mesh. During the leaching process, the liquid-solid ratio is controlled at 6:1, the temperature is 70°C, and the time is 4 hours. After one-stage leaching, filter to obtain nickel-cobalt-iron The primary leaching solution and the primary leaching slag whose main components are copper sulfide and precious metals enter the copper smelting system.

[0037] B. Two-stage leaching: Use the first-stage leaching solution obtained from the first-stage leach...

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Abstract

The invention discloses a method for directly separating nickel from copper by wet processing of low-grade nickel matte. The method includes subjecting the low-grade nickel matte to primary countercurrent leaching by sulfuric acid to obtain primary leaching liquor containing nickel, cobalt and iron and primary leaching residues with main ingredients of copper sulphate and precious metals; subjecting the low-grade nickel matte to secondary countercurrent leaching by the primary leaching liquor to obtain secondary leaching liquor containing nickel, cobalt and iron and secondary leaching residues; precipitating hydrogen sulfide gas produced after two times of leaching and the secondary leaching liquor to obtain iron-containing precipitation liquor and nickel-cobalt sulfide precipitation residues; finally, subjecting the precipitation liquor to high-temperature oxidation, hydrolysis and iron removal. The method has the advantages that the whole technological process makes the nickel and the cobalt directly separated from the precious metals and the copper, so that the drawbacks such as high loss of the cobalt, the nickel and the precious metals, high material circulation rate and highenergy consumption are avoided in a process of bessemerizing the low-grade nickel matte into high-grade nickel matte; the traditional technology of separating the nickel from the copper through high-matte grinding flotation is omitted, so that production energy consumption is reduced, and a recovery rate of the nickel, the copper, the cobalt and the precious metals is increased.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for directly separating nickel and copper through low-matte wet treatment. Background technique [0002] In the traditional nickel production process, the nickel concentrate is first dried and smelted to produce low-matte nickel, and the converter blows low-matte nickel to remove iron and part of the sulfur to obtain high-nickel matte containing about 70% copper and nickel. Secondary nickel concentrate, secondary copper concentrate and primary alloy are obtained through grinding, flotation and separation, which are used as raw materials for the production of nickel, copper and precious metals respectively. In the low nickel matte blowing process, the temperature of the converter is higher than 1230°C, the blowing time is longer, and part of the cobalt will enter the converter slag. In order to recover the cobalt and other valuable metals, the converter sla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/44C22B23/00C22B15/00
CPCC22B3/08C22B3/44C22B15/00C22B23/043C22B23/0461Y02P10/20
Inventor 陈彩霞张鹏欧晓健贺来荣王书友王玉华孙渊君席海龙赵秀丽苏俊敏马晶
Owner JINCHUAN GROUP LIMITED
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