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Method for separating and enriching copper, cadmium and zinc in copper and cadmium sediment

A technology for separating and enriching copper and cadmium slag, which is applied in the direction of improving process efficiency, can solve the problems of reducing the economic value of metals, increasing production costs, and low metal purity, so as to be easy to popularize and apply, save industrial land, and improve the environment Hygienic effect

Active Publication Date: 2013-08-28
陕西厚亿节能环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above three methods can effectively recover part of copper and cadmium metals. However, the first two methods have long processes, requiring many storage tanks and sites to store solutions, filter residues, etc., while the third method can leach zinc and cadmium in one step. , copper metal, but the precipitation and separation of metals by chemical methods requires a large amount of reagents, which increases the production cost
At the same time, the most important thing is that the purity of the metal obtained by the above method is low, which reduces the economic value of the metal and indirectly increases the production cost.

Method used

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  • Method for separating and enriching copper, cadmium and zinc in copper and cadmium sediment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058]Slurry the copper cadmium slag with water and add it to the leaching tank, then add sulfuric acid, pass in air and stir, control the pH value of the reaction solution between 0.8, heat the temperature at 30°C, and react for 0.5 hours, then filter to obtain a section of leaching solution with One-stage leaching residue: the obtained one-stage leaching residue is slurried with water and added to the leaching tank, then sulfuric acid is added, air is introduced into the mixture, and the reaction is controlled to have a pH value of 1, the heating temperature is 60°C, the reaction time is 1.5 hours, and then filtered. Obtain the second-stage leaching solution and the second-stage leaching residue, wherein, the mass fraction of zinc, copper, and cadmium in the second-stage leaching residue is lower than 0.5%; the first-stage leaching solution is extracted and extracted with copper by a copper extraction process, and the organic extractant is diluted to the mass fraction with ker...

Embodiment 2

[0073] Slurry the copper cadmium slag with water and add it to the leaching tank, then add sulfuric acid, pass in air and stir, control the pH value of the reaction solution between 1.2, heat the temperature at 60°C, and react for 1.5 hours, then filter to obtain a section of leaching solution with One-stage leaching residue; the obtained one-stage leaching residue is slurried with water and added to the leaching tank, then sulfuric acid is added, stirred, the pH value of the reaction solution is controlled between 3, the heating temperature is 80°C, the reaction time is 2.5 hours, and then filtered to obtain two First-stage leaching solution and second-stage leaching residue, wherein, the mass fraction of zinc, copper, and cadmium in the second-stage leaching residue is less than 0.5%; the first-stage leaching solution is extracted by copper extraction process to extract copper, and the organic extractant is diluted to a mass percentage concentration with kerosene 30%, the org...

Embodiment 3

[0087] Slurry the copper cadmium slag with water and add it to the leaching tank, then add sulfuric acid, pass in air and stir, control the pH value of the reaction solution between 1.0, heat the temperature at 45°C, and react for 1 hour, then filter to obtain a section of leaching solution with One-stage leaching residue; the obtained one-stage leaching residue is slurried with water and added to the leaching tank, then sulfuric acid is added, stirred, the pH value of the reaction solution is controlled between 2, the heating temperature is 70°C, the reaction time is 2 hours, and then filtered to obtain two First-stage leaching liquid and second-stage leaching residue, wherein, the mass fraction of zinc, copper, and cadmium in the second-stage leaching residue is lower than 0.5%; the first-stage leaching liquid is extracted and extracted with copper, and the organic extractant is diluted to a mass percentage concentration with kerosene 20%, the organic extractant is the LIX984...

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Abstract

The invention discloses a method for separating and enriching copper, cadmium and zinc in copper and cadmium sediment, which is characterized in that copper is extracted through a primary leaching step, a secondary leaching step and a copper extraction step, adsorption columns in serial connection are introduced into the residual extracted liquor subjected to acidification, and the cadmium is separated from the zinc by adopting a continuous adsorption exchanging process. The method has the advantages of simple process and low cost, the metal purity of the obtained copper, cadmium and zinc is high, the material used in the separation process is recyclable to use, and the method also has the advantages of short process period and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and relates to a method for separating and enriching copper, cadmium and zinc in copper-cadmium slag produced in a zinc smelting process. Background technique [0002] The zinc smelting process is to dissolve the zinc in the zinc ore with a dilute sulfuric acid solvent, so that the zinc can be dissolved into the solution as much as possible to form a zinc sulfate solution; then the solution is purified to remove impurities in the solution; and then from the zinc sulfate solution Zinc is electrolyzed; the cathode zinc electrolyzed is remelted and cast into an ingot, which is the finished product of the zinc smelting process. [0003] At present, the treatment process for the copper cadmium slag produced in the impurity removal process of the zinc smelting process is mainly divided into the following three types. [0004] (1) Separately establish a recovery system, focusing on zinc recover...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/24C22B7/04C22B3/08C22B15/00C22B19/30C22B17/00
CPCY02P10/20
Inventor 陈博烟小亿陈雷
Owner 陕西厚亿节能环保新材料科技有限公司
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