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Method of stripping cyanide and valuable metal on resin with ultrasonic

A valuable metal and cyanide technology, applied in the direction of improving process efficiency, can solve the problems of no gold ore cyanide solution, difficult desorption, poor effect, etc., to improve comprehensive recovery rate, improve desorption efficiency, and speed up transmission The effect of mass velocity

Inactive Publication Date: 2006-04-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

However, there is no industrial application example of ion exchange resin treatment of gold ore cyanide solution in my country, and it is still in the semi-industrial experimental stage.
[0006] In the current research, one of the main problems is that the desorption of cyanide and valuable metals adsorbed on the resin is difficult, slow and ineffective.

Method used

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  • Method of stripping cyanide and valuable metal on resin with ultrasonic

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Embodiment

[0021] Raw materials: gold extraction tail liquid from a gold smelter, its main components are: total cyanide 134.2mg / L, zinc 60.3mg / L, copper 630.2mg / L, gold 0.1mg / L, silver 0.23mg / L. Under normal temperature conditions, the volume ratio of resin to solution is: 1 / 15. After adsorption, the resin adsorption rate is 95.3% of total cyanide, 99.2% of zinc, 99.1% of copper, 95.3% of iron, and 99.8% of precious metal gold and silver. The loaded resin is desorbed step by step at room temperature in the desorption reactor, and the power used in the process is 40KW / dm 3 , Ultrasonic frequency is 10KHz for process strengthening. First use 2.5% sulfuric acid solution to desorb cyanide and zinc. The volume ratio of resin to solution is 1 / 3. After absorption by 10% sodium hydroxide solution, a sodium cyanide solution of about 10g / L can be obtained, which can be returned to the leaching system. Get a zinc sulfate solution of about 300mg / L, which can be obtained by distillation after multi...

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Abstract

An ultrasonic field intensified process for desorbing cyanide and valuable metals from resin includes such steps as washing the resin carrying cyanide and valuable metals until it become neutral, loading it in desorption tower with ultrasonic generator, using inorganic acid solution to desorb Zn, Ni and cyanide, ultrasonic field intensified blowing-down of the hydrogen cyanide, absorbing it by solution of sodium hydroxide to obtain sodium cyanide solution, returning it back to extracting system, using ammonia water to desorb Cu, using chelating agent to desorb noble metals, and reusing the resin after desorption.

Description

technical field [0001] The invention relates to a method for recovering and extracting cyanide, in particular to a method for comprehensively recovering cyanide and some valuable metal ions in gold extraction tailing liquid / tailings slurry by using ultrasonic-strengthened resin adsorption and desorption. Background technique [0002] Cyanide is a highly toxic substance, but in modern industry, it is also a widely used chemical reagent. In the metallurgical industry, it is used to extract precious metals such as gold and silver; in the electroplating industry, chemical industry, synthetic fiber industry, synthetic rubber industry, etc., the application of cyanide is also inseparable. The resulting environmental pollution and cyanide in waste liquid Recycling is always the research topic that people are most concerned about. [0003] In gold extraction, only a small part of cyanide used as a leaching agent is consumed during use, and most of it is contained in waste liquid or...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/24C22B3/04C22B3/20
CPCY02P10/20
Inventor 兰新哲赵西成宋永辉党晓娥梁帅表
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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