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Process for leaching cobalt from heterogenite by virtue of cobalt salt intermediate

A technology of hydrocobalt ore and cobalt salt, which is applied in the field of hydrometallurgy, can solve the problems of high cost and high consumption of chemical reagents, and achieve the effects of less environmental pollution and lower production costs

Inactive Publication Date: 2018-03-30
上海格派镍钴材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A reducing agent needs to be added during leaching, and an oxidizing agent needs to be added during iron removal. The consumption of chemical reagents is high and the cost is high.

Method used

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  • Process for leaching cobalt from heterogenite by virtue of cobalt salt intermediate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Hydrocobalt ore (composition Co: 10.2%, Cu: 4.4%, Fe: 2.34%, Mg: 1.21%, Ca: 0.003%), 90% through wet ball milling -100 mesh, pulp concentration greater than 35%, Sulfuric acid and sodium metabisulfite are added for reducing acid leaching, the temperature is 70°C, the time is 1.5h, the pH of the solution is controlled to be 1.5, Fe2+≤1.0g / l, the residual insoluble cobalt Co≤0.1% is sampled and analyzed, and the plate and frame filter press is used for solid-liquid separation.

[0019] (2) Add the filtrate obtained in step (1) to the hydrocobalt ore slurry, utilize the high-valent cobalt in the hydrocobalt ore to oxidize Fe2+, react for 1h, the temperature is 85°C, and simultaneously use the cobalt salt intermediate product to adjust the pH of the solution to 3.5, and take a sample When analyzing the solution Fe≤0.02g / l, use a plate and frame filter press for solid-liquid separation.

Embodiment 2

[0021] (1) Hydrocobalt ore (composition Co: 10.2%, Cu: 4.4%, Fe: 2.34%, Mg: 1.21%, Ca: 0.003%), through wet ball milling 92% -100 mesh, pulp concentration greater than 36%, Add sulfuric acid and sodium thiosulfate to reduce acid leaching temperature 75°C, time 1.2h, control solution pH = 1.5, Fe2+: 1.5g / l, take samples and analyze the residue without cobalt Co ≤ 0.1%, use a plate and frame filter press for solid-liquid separation .

[0022] (2) Add the leaching solution obtained in step (1) to the hydrocobalt ore slurry, utilize the high-valent cobalt in the hydrocobalt ore to oxidize Fe2+, and pass into high-pressure air to oxidize, react for 0.8h, and the temperature is 95 ° C. At the same time, use the cobalt salt intermediate product Adjust the pH of the solution to 3.3, and use a plate and frame filter press for solid-liquid separation when sampling and analyzing the solution for Fe≤0.02g / l.

Embodiment 3

[0024] (1) Hydrocobalt ore (composition Co: 10.2%, Cu: 4.4%, Fe: 2.34%, Mg: 1.21%, Ca: 0.003%), 90% through wet ball milling -100 mesh, pulp concentration greater than 30%, Add sulfuric acid and waste ferrous sulfate solution to reduce leaching temperature 75°C, time 1.3h, control solution pH = 1.5, Fe2+: 1.8g / l, take samples and analyze residue insoluble cobalt Co ≤ 0.08%, use plate and frame filter press for solid-liquid separation .

[0025] (2) Add the leaching solution obtained in step (1) to the hydrocobalt ore slurry, utilize the high-valent cobalt in the hydrocobalt ore to oxidize Fe2+, and pass through high-pressure air to oxidize, react for 0.8h, and the temperature is 75°C, and at the same time use cobalt salt intermediate product Adjust the pH of the solution to 3.2, and use a plate and frame filter press for solid-liquid separation when sampling and analyzing the solution Fe≤0.02g / l.

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Abstract

The invention discloses a process for leaching cobalt from heterogenite by virtue of cobalt salt intermediate. According to the process, heterogenite is used for oxidizing Fe<2+> in leach liquor, andthe cobalt salt intermediate is used for adjusting the solution, so that the amount of oxidant and alkali liquor added is reduced, the spare acidity of the leach liquor is made full use of, the consumption of reagents is reduced, the production cost is low, and the pollution to the environment is small.

Description

technical field [0001] The invention relates to a process for leaching intermediate products from hydrocobalt ore and cobalt salt, and belongs to the technical field of hydrometallurgy. Background technique [0002] Cobalt is a very scarce small metal resource, known as "industrial monosodium glutamate" and "industrial tooth", and is one of the important strategic resources. With excellent high temperature resistance, corrosion resistance and magnetic properties, it is widely used in aerospace, machinery manufacturing, electrical electronics, chemistry, ceramics and other industrial fields. It is an important raw material for the manufacture of superalloys, hard alloys, ceramic pigments, catalysts, and batteries. one. [0003] With the doubling of cobalt consumption at home and abroad, the raw material of hydrocobalt ore has become one of the main raw materials for the production of cobalt series products such as cobalt salt, cobalt oxide and electrolytic cobalt. It is main...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/44C22B23/00
CPCC22B3/08C22B3/44C22B23/043C22B23/0461Y02P10/20
Inventor 龚丽锋曹栋强朱永泽王向阳杨扬丁东久赵美平
Owner 上海格派镍钴材料股份有限公司
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