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Method for separating and recovering molybdenum and copper from rhenium extraction raffinate

A technology for separation and recovery of raffinate, applied in chemical instruments and methods, copper sulfate, molybdenum compounds, etc., can solve the problems of clogging the extraction tank, unfavorable extraction and stripping process, affecting the extraction process, etc., to achieve smooth process, reduce Handling difficulty, unique craftsmanship

Inactive Publication Date: 2019-11-22
JIANGXI COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the rhenium is extracted through the process of mixing the spray liquid and the pickling liquid to adjust the acid, the rhenium raffinate also contains a large amount of metal molybdenum, copper, and iron. How to separate it without entraining other impurities has become a technical difficulty, especially In the process of separating molybdenum, molybdenum can be dissolved under alkaline conditions and stripped for separation. However, in the process of extraction and stripping, if there is a large amount of ferric iron, it will be extremely harmful to the extraction and stripping process. Unfavorable, there will be three-phase and a large amount of ferric hydroxide precipitation to block the extraction tank, which will affect the extraction process; and the molybdenum extraction liquid also contains a large amount of copper ions, how to reduce the cost and recover the valuable metal copper, and directly use the molybdenum extraction liquid The continuity of the extraction tank for copper separation has become a great problem

Method used

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  • Method for separating and recovering molybdenum and copper from rhenium extraction raffinate
  • Method for separating and recovering molybdenum and copper from rhenium extraction raffinate
  • Method for separating and recovering molybdenum and copper from rhenium extraction raffinate

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Experimental program
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Effect test

Embodiment 1

[0037] Take the rhenium extraction raffinate with acidity for molybdenum separation, add a certain amount of sodium sulfite according to the volume of the rhenium extraction raffinate, and then add industrial caustic soda to adjust the pH of the rhenium extraction raffinate to 1.2--1.5. This solution is the molybdenum extraction stock solution. Molybdenum extraction stock solution contains molybdenum 0.66g / L, pH=1.30, specific gravity D=1.173 (17°C); rhenium extraction is organic-poor (20% N235+40% sec-octanol+kerosene). Specific gravity D = 0.822 (19°C); remaining detergent, pH = 2.10, specific gravity D = 1.000; stripping agent 7N NaOH solution, specific gravity D = 1.236 The experiment of separating molybdenum in the extraction tank was carried out by using 6-stage extraction, 2-stage washing, 3 Stage stripping, washing water strings to the extraction section and combining with the original solution for extraction, the stripping solution is acidified with hydrochloric acid, ...

Embodiment 2

[0042] Take the molybdenum raffinate to directly carry out the copper extraction experiment, the copper extraction stock solution contains 5.41g / L of copper; the loaded organic is calculated according to the organic after extraction balance, the organic phase of the molybdenum extraction is 20% Lix984+kerosene, and the density ρ=0.839 (20°C); washing The agent is a weakly acidic aqueous solution with pH=2.0 (pure water pH=7.08, 2mL of 1:1 sulfuric acid is added to 20kg of pure water, and the pH value is measured as 2.10), density ρ=1.000); stripping agent is 180g / L sulfuric acid, Density ρ = 1.141.

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Abstract

The invention belongs to the field of hydrometallurgy and particularly relates to a method for separating and recovering molybdenum and copper from rhenium extraction raffinate. The method comprises the following steps of adopting sodium sulfite as a reducing agent to adjust the acidity of the rhenium extraction raffinate, adding alkali to adjust the pH of the rhenium extraction raffinate, and performing extraction to obtain a sodium molybdate solution; and directly performing copper extraction on molybdenum raffinate to obtain a copper sulfate solution. The extraction rate of molybdenum in raw materials is 86 percent or more, and the extraction rate of copper is more than 99.3 percent. With adoption of the technical scheme, the method for separating and recovering molybdenum and copper from the rhenium extraction raffinate has the characteristics of unique process, smooth flow and high molybdenum and copper separation and recovery efficiency, iron removal is not needed in the whole extraction and back extraction process, waste residues are not generated, the purity of a back extraction solution is high, the impurity content is low, and the subsequent recovery and purification of molybdenum and copper are convenient; and molybdenum and copper in the rhenium extraction raffinate are effectively recovered, and therefore the treatment difficulty of heavy metal ions in waste wateris greatly reduced.

Description

technical field [0001] The method belongs to the field of hydrometallurgy, and in particular relates to a method for suppressing the impurities in copper, molybdenum and rhenium associated ores in the hydrometallurgical process when the impurities such as iron and copper are high in content and difficult to separate. , and make it smooth and smooth in the subsequent separation process, and there will be no three-phase and impurity precipitation that interferes with the separation process, so as to achieve the separation and recovery of molybdenum and copper recovery liquid with high concentration and low impurity from the rhenium raffinate. method. Background technique [0002] Molybdenite concentrate has many associated elements, such as rhenium, iron, copper, etc. During the process of roasting molybdenite concentrate in a rotary kiln, part of rhenium will volatilize with the flue gas, and will exist in the spray after being absorbed by water spray. In the liquid, there a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/34C22B7/00C22B3/28C22B3/30C22B15/00C01G39/00C01G3/10
CPCC01G3/10C01G39/00C22B7/006C22B15/0086C22B15/0089C22B34/34C22B3/282C22B3/30Y02P10/20
Inventor 郭株辉沈裕军王贺彭俊
Owner JIANGXI COPPER
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