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Method for separating nitrate from high-concentration nickel sulfate solution

A technology of sulfuric acid solution and nitrate, which is applied in the direction of nickel sulfate, nitric acid, chemical instruments and methods, etc., can solve problems such as nitrate separation, achieve the effect of increasing the content, increasing the utilization rate, and avoiding a large amount of waste water

Active Publication Date: 2019-06-21
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the invention is to provide a kind of method for separating nitrate in high concentration nickel sulfate solution, to solve the separation problem of nitrate in high concentration nickel nitrate

Method used

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  • Method for separating nitrate from high-concentration nickel sulfate solution
  • Method for separating nitrate from high-concentration nickel sulfate solution
  • Method for separating nitrate from high-concentration nickel sulfate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The composition (g / l) of high-concentration nickel sulfate solution is shown in Table 1:

[0025]

[0026] The high-concentration nickel sulfate solution separation nitrate technological process comprises the following steps:

[0027] (a) Resin adsorbs nitrate in high-concentration nickel sulfate solution: the nickel sulfate solution is adsorbed through the resin column after the last analysis, with a flow rate of 1.5BV / h; after adsorption, Ni101.5g / l in high-concentration nickel sulfate solution is obtained , NO 3 - 0.0035g / l. When the nitrate content in the adsorbed liquid is 0.098g / l, the adsorption is stopped. Wash the ion column with 1.0 BV resin volume of pure water.

[0028] (b) Sulfuric acid solution analysis: first use 10BV of sulfuric acid solution after the nitrate content of the previous production output is less than 2g / l with a concentration of 15% (mass concentration) for analysis, and then use 15% new sulfuric acid 5BV for analysis to analyze the ...

Embodiment 2

[0031] The composition (g / l) of high-concentration nickel sulfate solution is shown in Table 2:

[0032]

[0033] The high-concentration nickel sulfate solution separation nitrate technological process comprises the following steps:

[0034] a) Resin adsorption of nitrate in the high-concentration nickel sulfate solution: the nickel sulfate solution is adsorbed by the resin column after the last analysis, and the flow rate is 2.0BV / h; Ni99.35g / l, Ni99.35g / l, NO 3 - 0.004g / l. When the nitrate content in the adsorbed liquid is 0.10g / l, the adsorption is stopped. Wash the ion column with 1.0 BV resin volume of pure water.

[0035] b) Sulfuric acid solution analysis: first use 7BV of the sulfuric acid solution with a nitrate content of less than 2g / l and a concentration of 20% from the previous production for analysis, and then use 5BV of 20% new sulfuric acid for analysis, and the total acid content of the analysis is 12BV; The nitrate content in the after liquor was redu...

Embodiment 3

[0038] The composition (g / l) of the high-concentration nickel sulfate solution is shown in Table 3.

[0039]

[0040] The high-concentration nickel sulfate solution separation nitrate technological process comprises the following steps:

[0041]a) Resin adsorption of nitrate in the high-concentration nickel sulfate solution: the nickel sulfate solution is adsorbed by the resin column after the last analysis, and the flow rate is 2.2BV / h; Ni90.43g / l, Ni90.43g / l, NO 3 - 0.0022g / l. When the nitrate content in the adsorbed liquid is 0.089g / l, the adsorption is stopped. Wash the ion column with 1.0 BV resin volume of pure water.

[0042] b) Sulfuric acid solution analysis: first use 5BV of sulfuric acid solution with nitrate content less than 2g / l and concentration of 20% from the previous production for analysis, and then analyze with 6BV of 20% new sulfuric acid, and analyze the total acid content of 11BV; The nitrate content in the after liquor was reduced from 14.63g / l ...

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Abstract

The invention discloses a method for separating nitrate from a high-concentration nickel sulfate solution, and belongs to the field of nonferrous metal hydrometallurgy to solve the problem of separation of nitrate from high-concentration nickel nitrate. The method comprises the following steps: adsorbing the nitrate in the high-concentration nickel sulfate solution with resin, washing and pretreating new resin with a sulfuric acid solution, and then adsorbing the nitrate in the nickel sulfate with the treated resin; and analyzing the nitrate on the resin by using the sulfuric acid solution, discharging the analyzed solution having a nitrate content more than 2 g / l, and reusing sulfuric acid and nitric acid; putting the analyzed solution having a nitrate content less than 2 g / l into next saturated resin for analysis. The method disclosed by the invention is simple, easy to operate and high in removal depth of nitrate, and does not introduce any impurities; the whole process ensures thepurity and high concentration of the nickel sulfate solution, does not generate waste water and waste residues, and belongs to green metallurgy.

Description

technical field [0001] The invention belongs to the field of nonferrous metal hydrometallurgy, and in particular relates to a method for separating nitrate in a high-concentration nickel sulfate solution. Background technique [0002] In the nitric acid leaching process of nickel matte, the valuable metals of nickel, copper and cobalt are finally transformed into the sulfuric acid system to obtain a nickel sulfate solution. During the transformation process, the nitrate is entrained into the nickel sulfate solution. The main components of the solution are Ni60g / l-120g / l, Co0. 1-10g / l, Cu0.1g / l-20g / l, NO 3 - 0.3g / l-10g / l, SO 4 2- 100g / l-200g / l, the pH of the solution is 2-6. This nickel sulfate solution is mainly used to produce electroplating-grade or battery-grade nickel sulfate products, and the nitrate radicals in it must be separated, and the final nitrate radical content is required to be less than 0.2g / l. Also do not see the separation process of nitrate in this k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/10C01B17/74C01B21/42
Inventor 刘玉强张晗李娟李维舟陈彩霞王书友郭金权高晓婷郁洪波席海龙李全王钦马天飞路思阳张建玲
Owner JINCHUAN GROUP LIMITED
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