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Method for treating cobalt nickel sulfate solution

A kind of technology of nickel cobalt sulfate and treatment method, which is applied in the metallurgical field to achieve the effect of low cost

Active Publication Date: 2014-08-20
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of the above-mentioned precipitant has caused a large amount of sodium and magnesium discharge, which will become a fatal problem in the process

Method used

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  • Method for treating cobalt nickel sulfate solution
  • Method for treating cobalt nickel sulfate solution
  • Method for treating cobalt nickel sulfate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The composition of the nickel-cobalt sulfate solution to be treated is shown in Table 1;

[0046] Table 1

[0047]

[0048] according to figure 2 Shown step, take above-mentioned nickel cobalt sulfate solution 5m 3 After being heated to 50 degrees Celsius, 340kg of milk of lime with a calcium hydroxide concentration of 5wt% was added thereto, and reacted for 1h. Separation is carried out by a cyclone. The overflow is nickel-cobalt hydroxide slurry, and the underflow is calcium sulfate slurry. Part of the calcium sulfate slurry is used as a seed crystal for precipitation. The gypsum seed crystal multiple is 8. Sulfuric acid and water with a concentration of 2wt% are used to pickle and filter the calcium sulfate slurry to obtain filtrate and gypsum products. The nickel-cobalt hydroxide slurry is densely separated to obtain an underflow slurry and an overflow slurry, and water is used to filter and wash the underflow slurry to obtain a nickel-cobalt hydroxide filter...

Embodiment 2

[0051] according to figure 2 Shown step, take above-mentioned nickel cobalt sulfate solution 5m 3 After being heated to 50 degrees Celsius, 170 kg of lime milk with a calcium hydroxide concentration of 10 wt % was added thereto, and reacted for 1 h. Separation is carried out by a cyclone, the overflow is nickel-cobalt hydroxide slurry, the underflow is calcium sulfate slurry, and a part of the calcium sulfate slurry is returned as a seed crystal for precipitation, and the gypsum seed crystal multiple is 5. Sulfuric acid and water with a concentration of 2wt% are used to pickle and filter the calcium sulfate slurry to obtain filtrate and gypsum products. The nickel-cobalt hydroxide slurry is densely separated to obtain an underflow slurry and an overflow slurry, and water is used to filter and wash the underflow slurry to obtain a nickel-cobalt hydroxide filter cake and a filtrate. Return the filtrate and overflow slurry obtained by the two-step filtration to carry out nicke...

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Abstract

The invention discloses a method for treating a cobalt nickel sulfate solution. The method comprises the steps of (1) adding lime milk into the cobalt nickel sulfate solution to carry out nickel and cobalt sedimentation treatment to obtain cobalt nickel hydroxide sediment and gypsum contained mixed slurry; (2) carrying out hydrocyclone separation on the mixed slurry to obtain cobalt nickel hydroxide slurry and gypsum slurry; (3) pickling and filtering the gypsum slurry to obtain gypsum and first filtrate; (4) thickening and separating the cobalt nickel hydroxide slurry to obtain underflow slurry and overflow slurry; (5) cleaning and filtering the underflow slurry to obtain a cobalt nickel hydroxide filter cake and second filtrate. By using the method, the treatment cost can be effectively reduced, and other impurities can be prevented form being introduced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular, the invention relates to a treatment method of a nickel-cobalt sulfate solution. Background technique [0002] The traditional hydrometallurgical treatment process of nickel-cobalt-containing laterite ore is relatively long, including a series of processes such as sulfuric acid leaching, impurity removal, precipitation, dissolution, extraction (impurity removal and nickel-cobalt separation) and electrowinning. After the laterite ore is leached by wet method and impurities are removed, a sulfate system solution containing 3-5g / L nickel and <1g / L cobalt is obtained. The impurity-removed liquid is subjected to nickel-cobalt precipitation with a precipitant to obtain nickel-cobalt intermediate products, and finally the pH value is controlled before magnesium precipitation to separate magnesium from nickel-cobalt products. [0003] The purpose of the precipitation process is to initially e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/46C22B23/00
CPCY02P10/20
Inventor 孙宁磊时炜丁淑荣殷书岩陈兴张阳秦明晓王魁珽
Owner CHINA ENFI ENGINEERING CORPORATION
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