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Copper removal method of nickel solution

A technology of nickel solution and copper removal, which is applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of poor copper removal effect, difficult slag treatment, water imbalance in the process system, etc., and achieve obvious economic benefits and Environmental benefits, good solid-liquid separation performance, and less copper removal slag

Inactive Publication Date: 2018-09-11
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

[0017] Embodiment 1: Process nickel solution 5L (composition: Ni 2+ 55.5g / L, Cu 2+ 517mg / L, pH5.5). The reaction conditions are: temperature 25°C, time 15min, stirring intensity 30 r / min, ultrasonic power input per cubic meter of solution 2kW, thioacetamide addition of 4% of the theoretical amount, sodium sulfide addition of 135% of the theoretical amount, and the amount of copper removal slag added is 100% of the net slag amount produced by the same amount of solution treatment in the previous batch. The copper concentration of the treated solution was 0.29 mg / L.

Embodiment 2

[0018] Embodiment 2: process in tubular reactor by the nickel solution 100L (composition: Ni 2+ 58.4g / L, Cu 2+ 498mg / L, pH4.8). The reaction conditions are: temperature 35°C, time 8min, solution flow rate 1.0m / s, ultrasonic power input per cubic meter of solution 4kW, thioacetamide addition 3% of the theoretical amount, sodium sulfide addition It is 120% of the theoretical amount, and the amount of copper removal slag added 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 0.45mg / L.

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PUM

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Abstract

The invention discloses a copper removal method of a nickel solution. According to the method, a thioacetamide and sodium sulphide complex copper removal agent is adopted, copper removal residues are added for copper removal under the action of ultrasonic waves, and the copper concentration of the solution is lower than 1 mg / L after copper removal.

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 production process of nickel, qualified electrolyte is the prerequisite to ensure the quality of nickel. Copper is contained in nickel solution, and copper has obvious influence on the quality of nickel. Therefore, decoppering of nickel solution is an essential process for nickel production. At present, the main methods of copper removal from nickel solution include copper removal from anode slime and (or) nickel concentrate, and copper removal from active nickel sulfide. The former has poor decopper effect, large amount of slag, difficult slag treatment, and loss of platinum group metals in the process of slag treatment; the latter needs to prepare active nickel sulfide in dilute solution, and the prepared active nickel sulfide must be timely Use, other...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/08C25C7/06C22B3/44
CPCC22B3/44C25C1/08C25C7/06Y02P10/20
Inventor 龙炳清聂付江邓其娟
Owner SICHUAN NORMAL UNIV
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