Method for producing crude cobalt hydroxide from cobalt-containing low-copper raffinate industrially

A cobalt hydroxide and raffinate technology, applied in the field of hydrometallurgy, can solve the problems of low primary recovery rate of products, high unit consumption of auxiliary materials, low cobalt content, etc. The effect of quality indicators

Inactive Publication Date: 2022-01-21
北方矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides an industrial method for producing crude cobalt hydroxide from cobalt-containing and low-copper raffinate. Problems such as low recovery rate and high unit consumption of auxiliary materials

Method used

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  • Method for producing crude cobalt hydroxide from cobalt-containing low-copper raffinate industrially
  • Method for producing crude cobalt hydroxide from cobalt-containing low-copper raffinate industrially
  • Method for producing crude cobalt hydroxide from cobalt-containing low-copper raffinate industrially

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The components of the cobalt-containing low-copper raffinate used in this example are Co: 3.12g / L, Cu: 0.315g / L, Mn: 1.12g / L, Fe: 1.235g / L, Ca: 0.6g / L, H 2 SO 4 :22.1g / L

[0019] Iron removal process: the cobalt-containing and low-copper raffinate is 180m 3 The speed of / h is passed into the No. 1 tank for iron removal, and the reaction feed liquid is sequentially flowed from the No. 1 tank of the first section of cobalt sinking to the No. 6 tank by using the height difference of the tank; it is respectively passed into the No. 1, 2, 3 and 4 tanks For quicklime slurry with a mass concentration of 17.6%, control and adjust the pH of each tank to 2.5 to 4.5, and the pH at the end point to be 5.0; respectively feed sodium pyrosulfite solutions with a mass concentration of 18% into iron removal tanks 1, 2, and 3; 30L / min of compressed air is fed into No. 1 to No. 6 tanks, and the oxidation-reduction potential of each tank is controlled to be about 420mv; the reaction time...

Embodiment 2

[0028] The components of the cobalt-containing and low-copper raffinate used in this example are Co: 2.82g / L, Cu: 0.217g / L, Mn: 1.14g / L, Fe: 1.435g / L, Ca: 0.5g / L, H 2 SO 4 :23.5g / L

[0029] Iron removal process: the cobalt-containing and low-copper raffinate is 190m 3 The speed of / h is passed into the No. 1 tank for iron removal, and the reaction feed liquid is sequentially flowed from the No. 1 tank of the first section of cobalt sinking to the No. 6 tank by using the height difference of the tank; it is respectively passed into the No. 1, 2, 3 and 4 tanks For quicklime slurry with a mass concentration of 15%, control and adjust the pH of each tank to 2.5 to 4.0, and the pH at the end point to 4.5; feed sodium metabisulfite solutions with a mass concentration of 18% into iron removal tanks 1, 2, and 3 respectively; 45L / min of compressed air is fed into No. 1 to No. 6 tanks, and the oxidation-reduction potential of each tank is controlled to be about 460mv; the reaction tim...

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PUM

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Abstract

The invention relates to a method for producing crude cobalt hydroxide from cobalt-containing low-copper raffinate industrially, which adopts related processes such as iron removal, first-stage cobalt precipitation, second-stage cobalt precipitation, filter-pressing slurrying washing, flash drying and the like, optimizes an iron removal process, adopts a sodium pyrosulfite solution as an iron removal adding agent and returns part of iron slag as an iron removal reaction seed crystal. Thus, theiron removal effect is greatly improved. Meanwhile, the quality index of the second-stage cobalt precipitation slag is improved through process improvement, the second-stage cobalt precipitation slag is completely used as first-stage cobalt precipitation reaction seed crystals, rapid formation and growth of first-stage cobalt precipitation reaction crystal nucleuses are effectively promoted, the first-stage cobalt precipitation efficiency is improved, and the utilization efficiency of magnesium oxide is improved; the total output and the one-time recovery rate of cobalt hydroxide products are greatly improved, and a series of problems of poor iron removal effect, low cobalt hydroxide cobalt content, low product one-time recovery rate, high auxiliary material unit consumption and the like under the condition of the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for producing crude cobalt hydroxide from an industrial cobalt-containing and low-copper raffinate. Background technique [0002] In the prior art, the treatment effects of iron removal and cobalt precipitation in the preparation process of crude cobalt hydroxide are still not very satisfactory. A series of related problems such as low cobalt precipitation rate, high unit consumption of auxiliary materials, and low primary recovery rate of products, and the crude cobalt hydroxide products generally have low cobalt content (<33%), Fe, Mn, Mg, etc. Problems such as high impurity content. Contents of the invention [0003] The invention provides an industrial method for producing crude cobalt hydroxide from cobalt-containing and low-copper raffinate. Problems such as low recovery rate and high unit consumption of auxiliary materials. [0004] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04C22B23/00C22B7/00
CPCC01G51/04C22B7/006C22B23/0461Y02P10/20
Inventor 张志兵石玉臣张恩普张骄孙剑沈金灵周平
Owner 北方矿业有限责任公司
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