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Copper removal method of nickel solution

A technology for nickel solution and copper removal, applied in chemical instruments and methods, nickel compounds, improvement of process efficiency, etc., can solve problems such as poor copper removal effect, difficulty in slag treatment, and unbalanced water in the process system, and achieve obvious results. Economic and environmental benefits, good solid-liquid separation performance, and less copper removal slag production

Inactive Publication Date: 2019-02-12
SICHUAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The decopper effect of the former is not very good, the amount of slag is large, the slag treatment is difficult, and the loss of platinum group metals is caused during the slag treatment process; the latter needs to prepare active nickel sulfide in dilute solution, and the prepared active nickel sulfide must be timely Use, otherwise it will be inactivated during storage, which will affect the decopper effect, and the requirements for process matching are very high. In addition, it may cause water imbalance in the process system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Treating 5L of nickel solution (composition: Ni 2+ 55.5g / L, Cu 2+ 517mg / L, pH5.5). The reaction conditions are: temperature 25℃, time 2.5h, stirring intensity 70r / min, adding amount of thioacetamide is 4% of theoretical amount, adding amount of sodium sulfide is 135% of theoretical amount, adding copper removal slag The amount is 100% of the net slag amount produced by the same amount of solution treatment in the previous batch. The copper concentration of the solution after treatment was 0.35 mg / L.

Embodiment 2

[0016] Example 2: Treatment of 100L of nickel solution (composition: Ni 2+ 58.4g / L, Cu 2+ 498mg / L, pH4.8). The reaction conditions are: temperature 45℃, time 1.0h, stirring intensity 30r / min, adding amount of thioacetamide is 3% of theoretical amount, adding amount of sodium sulfide is 120% of theoretical amount, adding copper removal slag The amount is 150% of the net slag amount produced by the same amount of solution treatment in the previous batch. The copper concentration of the solution after treatment was 0.95 mg / L.

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PUM

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Abstract

The invention provides a nickel solution decoppering method. The nickel solution decoppering method is characterized in that a thioacetamide and sodium sulfide composite decoppering agent is adopted, decoppering slag is added for copper removal, and the concentration of copper in the decoppered solution is smaller than 1 mg / L.

Description

Technical field [0001] The invention relates to a method for removing copper from a nickel solution. Background technique [0002] Nickel is an important raw material for the production of many industrial products. In the nickel production process, qualified electrolyte is a prerequisite to ensure the quality of nickel. The nickel solution contains copper, and copper has a significant impact on the quality of nickel. Therefore, the removal of copper from the nickel solution is an indispensable process for nickel production. At present, the main methods for removing copper from nickel solution include anode slime and (or) nickel concentrate removal, and active nickel sulfide removal. The former has poor copper removal effect, large slag volume, difficult slag treatment, and loss of platinum group metals during the slag treatment; the latter requires the preparation of active nickel sulfide in a dilute solution, and the prepared active nickel sulfide must be timely Use, otherwis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B23/00C25C1/08C01G53/00
CPCC01G53/00C22B23/0461C25C1/08Y02P10/20
Inventor 龙炳清秦丹曹攀
Owner SICHUAN NORMAL UNIV
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