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Method for recycling nickel sulfate raffinate

A technology for extracting residual liquid and nickel sulfate, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc. The effect of reducing pollution, reducing stress and improving economic efficiency

Inactive Publication Date: 2009-09-16
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

P 204 The annual discharge of the raffinate is 360,000m 3 Left and right, this part of wastewater is directly discharged into the wastewater system, which not only pollutes the environment, increases the processing capacity of the wastewater system, but also causes a waste of resources

Method used

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  • Method for recycling nickel sulfate raffinate
  • Method for recycling nickel sulfate raffinate
  • Method for recycling nickel sulfate raffinate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Table 1 Nickel sulfate P 204 Raffinate composition g / l

[0029]

[0030] After series degreasing, nickel sulfate P 204 The content of organic matter in the extraction raffinate is reduced to 0.56ppm, and the content of nickel ions is reduced to 0.0033g / l after the resin removes impurities. After removing oil and impurities, nickel sulfate P 204 The sodium sulfate obtained by membrane filtration, evaporation and crystallization of the raffinate reaches the industrial grade standard.

[0031] Table 2 Sodium sulfate composition %

[0032]

Embodiment 2

[0034] Table 3 Nickel Sulfate P 204 Raffinate composition g / l

[0035]

[0036] After series degreasing, nickel sulfate P 204 The content of organic matter in the extraction raffinate is reduced to 0.30ppm, and the content of nickel ions is reduced to 0.0018g / l after the resin removes impurities. After removing oil and impurities, nickel sulfate P 204 The sodium sulfate obtained by membrane filtration, evaporation and crystallization of the raffinate reaches the industrial grade standard.

[0037] Table 4 Sodium sulfate composition %

[0038]

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Abstract

The invention relates to a method for recycling nickel sulfate P204 raffinate and is characterized in that the steps of the recycling process sequentially comprise: (1) using the manners of physical clarification, air flotation, ultrasonic demulsification and resin absorption to carry out sectional de-oiling to reduce the organism in the solution to below 1ppm; (2) using CN27 resin to absorb the nickel element in the solution so that the nickel ion concentration in the solution after resin absorption is lower than 0.004g / l; and (3) evaporating and crystallizing the solution after de-oiling and nickel ion absorption to obtain sodium sulfate. The method can effectively alleviate the pressure of the waste water treatment system, reducing the environment pollution caused by the waste water, realizes the comprehensive recycling of valuable metals, organism and sodium sulfate in the waste water and enlarges the economic benefit.

Description

technical field [0001] The present invention relates to a kind of nickel sulfate P 204 Recycling method of extracting raffinate. Background technique [0002] When preparing nickel sulfate products, the main raw material is the crude nickel sulfate solution obtained by dissolving nickel carbonate solids containing other metal impurities through sulfuric acid or the nickel electrolysis solution containing high impurities. These solutions need to be chemically removed from iron, calcium and magnesium. , copper and other impurities after P 204 After extracting and removing sodium, pure nickel sulfate solution can be prepared. Therefore P 204 The raffinate contains a large amount of sodium sulfate, a very small amount of metal elements and organic matter entrained in the solution. P 204 The annual discharge of the raffinate is 360,000m 3 Left and right, this part of wastewater is directly discharged into the wastewater system, which not only pollutes the environment, incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/24C02F1/36C02F1/28C02F1/04C02F101/20
Inventor 陈自江李改变吕登才任晖时金秋
Owner JINCHUAN GROUP LIMITED
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