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Method for removing iron impurities and gathering cupric ions in copper sulfate solution

A technology of iron impurities and copper sulfate, applied in the direction of copper sulfate, etc., can solve the problems of affecting the working exchange capacity of ion exchange resin, resin poisoning failure, high process cost, etc., and achieve good iron removal effect, low production cost and simple process.

Active Publication Date: 2014-12-24
HENAN GONGXIN ENVIRONMENTAL PROTECTION & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Copper ore leaching CuSO 4 The crude solution contains a lot of Fe 3+ , Fe 2+ , seriously affect the working exchange capacity of the ion exchange resin, and even cause resin poisoning to fail
The existing iron removal process mainly removes impurity Fe by adjusting the pH value of acid and alkali. 3+ , Fe 2+ , the process cost is high, and the process is relatively complicated. After adjusting the pH value, it must be filtered, precipitated and other processes, and the impurity Fe 3+ , Fe 2+ The removal is not clean

Method used

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  • Method for removing iron impurities and gathering cupric ions in copper sulfate solution
  • Method for removing iron impurities and gathering cupric ions in copper sulfate solution
  • Method for removing iron impurities and gathering cupric ions in copper sulfate solution

Examples

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Effect test

Embodiment 1

[0035] Example 1: A removal of CuSO 4 Iron impurities in solution and enriched Cu 2+ method, including the following steps:

[0036] CuSO with a concentration of 2.5g / L 4 Adjust the pH value of the crude solution to 2-4 with sulfuric acid, and use a corrosion-resistant infusion pump to dissolve CuSO 4 The crude solution is poured into a column equipped with 001×7 strong acid cation resin to remove Fe 3+ , Fe 2+ , when processing CuSO 4 The flow rate of the crude solution is 8BV / h, and the low-iron CuSO is obtained after treatment 4 solution;

[0037] Pass the low-iron copper sulfate solution into the macroporous strong acid cation exchange resin column at a flow rate of 2BV / h to absorb and enrich Cu 2+ , Cu in solution 2+ Ion exchange reaction with macroporous strong acid cation resin, Cu 2+ All are adsorbed by macroporous strong acid cation resin;

[0038] Adsorption of Cu by Macroporous Strong Acid Cationic Resin 2+ After saturation, use 18% sulfuric acid to bac...

Embodiment 2

[0040] Example 2: A removal of CuSO 4 Iron impurities in solution and enriched Cu 2+ method, including the following steps:

[0041] CuSO with a concentration of 3.0g / L 4 For the crude solution, adjust the pH value to 2-4 with sulfuric acid, and use a corrosion-resistant infusion pump to dissolve CuSO 4 The crude solution is poured into a column equipped with 001×7 strong acid cation resin to remove Fe 3+ , Fe 2+ , when processing CuSO 4 The flow rate of the crude solution was 10BV / h to obtain low-iron CuSO 4 solution;

[0042] Pass the low-iron copper sulfate solution into the macroporous strong acid cation exchange resin column at a flow rate of 4BV / h to absorb and enrich Cu 2+ , Cu in solution 2+ Ion exchange reaction with macroporous strong acid cation resin, Cu 2+ All are adsorbed by macroporous strong acid cation resin;

[0043] Adsorption of Cu by Macroporous Strong Acid Cationic Resin 2+ After saturation, use 18% sulfuric acid to backwash the resin at ...

Embodiment 3

[0045] Example 3: A removal of CuSO 4 Iron impurities in solution and enriched Cu 2+ method, including the following steps:

[0046] CuSO with a concentration of 4.5g / L 4 For the crude solution, use sulfuric acid to adjust the pH value to 2-4, and use a corrosion-resistant infusion pump to pour it into a column equipped with 001×7 strong acid cation resin to remove Fe. 3+ , Fe 2+ , when processing CuSO 4 The flow rate of the crude solution was 12BV / h to obtain low-iron CuSO 4 solution;

[0047] Pass the low-iron copper sulfate solution into the macroporous strong acid cation exchange resin column at a flow rate of 5BV / h to adsorb and enrich Cu 2+ , Cu in solution 2+ Ion exchange reaction with macroporous strong acid cation resin, Cu 2+ All are adsorbed by macroporous strong acid cation resin;

[0048] Adsorption of Cu by Macroporous Strong Acid Cationic Resin 2+ After saturation, backwash with 18% sulfuric acid at a flow rate of 3BV / h for desorption, and obtain a d...

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Abstract

The invention relates to a method for removing iron impurities and gathering cupric ions in a copper sulfate solution. The method includes the steps of adding a strong acid cation exchange resin column to a copper sulfate crude solution for removing iron; adding a macroporous strong acid cation exchange resin column to the copper sulfate solution with low iron content for adsorbing and gathering all cupric ions; backwashing for desorption with sulfuric acid after cupric ions adsorbed by the macroporous strong acid cation exchange resin are saturated, wherein the desorbed macroporous strong acid cation exchange resin can be recycled. The method for removing the iron impurities and the gathering cupric ions in the copper sulfate solution is simple in technology, short in process, high in copper extraction rate, low in production costs and capable of achieving the purpose of copper gathering as well as iron removing, the obtained copper sulfate solution is high in purity, the strong acid cation exchange resin and the macroporous strong acid cation exchange resin can be recycled, and the entire process is environmentally friendly and pollution-free.

Description

technical field [0001] The invention relates to a method for removing iron impurities by ion exchange, in particular to a method for removing CuSO 4 Iron impurities in solution and Cu enrichment 2+ Methods. Background technique [0002] Copper ore leaching CuSO 4 The crude solution contains a lot of Fe 3+ , Fe 2+ , Seriously affect the working exchange capacity of the ion exchange resin, and even cause resin poisoning to fail. The existing iron removal process mainly removes impurity Fe by adjusting the pH value of acid and alkali. 3+ , Fe 2+ , the process cost is high, and the process is relatively complicated. After adjusting the pH value, it must be filtered, precipitated and other processes, and the impurity Fe 3+ , Fe 2+ The removal is not clean. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an ion exchange removal method for impurity iron in copper sulfate solution, which has the advantages of si...

Claims

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Application Information

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IPC IPC(8): C01G3/10
Inventor 陈永丰孙伟郭志文王向阳
Owner HENAN GONGXIN ENVIRONMENTAL PROTECTION & TECH CO LTD
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