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Process for sectionally reducing and leaching African heterogenite

A water cobalt ore and leaching technology, applied in the field of metallurgy, can solve the problems of increasing environmental protection pressure, losing reduction effect, and existing safety hazards, so as to reduce the impact of environmental protection, avoid the production of toxic and harmful gases, and reduce the generation of toxic and harmful gases. Effect

Inactive Publication Date: 2018-03-09
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of this method are: due to the certain acidity when adding the reducing agent, it will inevitably cause part of the reducing agent to decompose and lose its reducing effect; Security risks
While losing the reducing effect, it also causes air pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The invention discloses a process for segmented reduction and leaching of African water cobalt ore, comprising the following steps:

[0016] The first stage: reduction, the water cobalt ore is ball-milled into the required solid-liquid ratio slurry with water, heated to the required temperature, and 0.5~1 times of sodium sulfite is added according to the amount and mass of cobalt metal, and the reduction time is 6 hours;

[0017] The second stage: leaching, after the reduction is completed, sulfuric acid is added at 4 times the amount of cobalt metal, and leaching is carried out for 3 hours. Add 0.2 times sodium sulfite according to the amount of cobalt metal, and then leaching for half an hour to complete the leaching process.

[0018] In this embodiment, the range of the required solid-liquid ratio is 1t: 5m 3 . The desired temperature is greater than 70°C.

Embodiment 2

[0020] The invention discloses a process for segmented reduction and leaching of African water cobalt ore, comprising the following steps:

[0021] The first stage: reduction, the water cobalt ore is ball-milled into the required solid-liquid ratio slurry, heated to the required temperature, and 0.4~0.8 times of sodium metabisulfite is added according to the amount and mass of cobalt metal, and the reduction time is 5 hours;

[0022] The second stage: leaching, after the reduction is completed, sulfuric acid is added at 3.5 times the amount of cobalt metal, and leaching is performed for 4 hours. Add 0.15 times of sodium metabisulfite according to the amount of cobalt metal, and then leaching for half an hour to complete the leaching process.

[0023] In this embodiment, the range of the required solid-liquid ratio is 1t:4.2m 3 . The desired temperature is greater than 70°C.

Embodiment 3

[0025] The invention discloses a process for segmented reduction and leaching of African water cobalt ore, comprising the following steps:

[0026] The first stage: reduction, the water cobalt ore is ball-milled into the required solid-liquid ratio slurry with water, heated to the required temperature, and 0.4~0.9 times of hydrazine hydrate or hydroxylamine is added according to the mass of cobalt metal, and the reduction time is 4 hours ;

[0027] The second stage: leaching, after the reduction is completed, sulfuric acid is added at 4.5 times the amount of cobalt metal, and leaching is performed for 3.5 hours. Add 0.1 times of hydrazine hydrate or hydroxylamine according to the amount of cobalt metal, and then leaching for half an hour to complete the leaching process.

[0028] In this embodiment, the range of the required solid-liquid ratio is 1t:3.5m 3 . The desired temperature is greater than 70°C.

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PUM

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Abstract

The invention discloses a process for sectionally reducing and leaching African heterogenite. The process includes the steps: in the first stage: performing reduction for longer than 2 hours, ball-milling the heterogenite, concocting the ball-milled heterogenite by the aid of water into ore pulp with needed solid-liquid ratio, heating the ore pulp to reach the needed temperature, and adding 0.5-1time of sodium sulfite or 0.4-0.8 time of sodium pyrosulfite or 0.4-0.9 time of hydrazine hydrate or hydroxylamine by weight of cobalt metals; in the second stage: performing leaching for 2 hours, adding 4 times of sulfuric acid by the weight of the cobalt metals after reduction, adding 0.2 time of sodium sulfite or 0.15 time of sodium pyrosulfite or 0.1 time of hydrazine hydrate or hydroxylamineby the weight of the cobalt metals, performing leaching for half an hour to finish leaching. The process has the advantages of less reducing agent loss, simplicity and low air environmental pollutionand cost.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a process for leaching African water cobalt ore by stage reduction. Background technique [0002] At present, the leaching process of water cobalt ore in Africa is to use sulfuric acid and reducing agent for reducing acid leaching: after the water cobalt ore is subjected to wet ball milling, after the slurry is adjusted to the slurry ratio, sulfuric acid is added to carry out acid reduction leaching at a temperature higher than 70 °C. Since some cobalt in water cobalt ore is trivalent, it cannot be directly leached by sulfuric acid. Therefore, a certain amount of reducing agent should be added in the leaching process. The commonly added reducing agent is sodium sulfite (or sodium metabisulfite, hydrazine hydrate, hydroxylamine, etc.). [0003] The disadvantage of this method is: due to the certain acidity when the reducing agent is added, it will inevitably cause part of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B23/00
CPCC22B3/08C22B23/043Y02P10/20
Inventor 钟晖吴理觉汤依伟徐定源陈耀李文津何玉娴
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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