Method for recycling gold in situ from gold-containing wastewater

A technology for recovering gold and wastewater, applied in the field of gold recovery, can solve problems such as secondary pollution and concentration polarization, and achieve the effects of low production cost, easy operation, and complete gold recovery

Inactive Publication Date: 2016-08-03
深圳市世清环保科技有限公司 +1
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0005] Activated carbon and resin adsorption methods can recover gold more completely, but the existing technology is to extract gold by incinerating activated carbon or resin adsorbed with gold, which will cause serious secondar

Method used

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  • Method for recycling gold in situ from gold-containing wastewater

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Embodiment Construction

[0023] Such as figure 1 Shown, the process of the present invention is as follows:

[0024] Step 1. Preparation

[0025] Utilize the gold-containing waste water tank to collect the gold-containing waste water for use.

[0026] Step 2. Resin absorbs gold

[0027] Weigh a certain amount of resin (also known as gold-absorbing resin, the present invention uses anionic resin) and place it in an ion-exchange column, wash the resin with deionized water, swell after soaking for a period of time after washing, and then place the resin containing The gold wastewater is pumped into the ion exchange column and fully fused with the resin, and the swollen resin absorbs the gold in the gold-containing wastewater to form a gold-loaded resin. According to the concentration of gold in the gold-containing wastewater, the number of stages and the speed of the ion exchange column are set to ensure that the gold content in the wastewater after the ion exchange column has been adsorbed by gold is...

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Abstract

The invention discloses a method for recycling gold in situ from gold-containing wastewater. The method is free of pollution, simple in process and convenient and rapid to implement, and intermediate consumables can be reutilized. The technological method of resin adsorption, gold-loaded resin desorption, diaphragm electrodeposition and barren resin gold adsorption is adopted, so that the process has the advantages of being high in production efficiency, low in production cost, free of wastewater transfer cost, thorough in gold recycling and the like; enrichment, elution desorption and electrolysis are carried out in situ, gold recycling is achieved, and the risk of wastewater transfer is avoided. According to the method, chelate resin is adopted to adsorb gold, an acidic thiourea system is adopted to carry out elution desorption on gold-loaded resin, barren resin obtained after desorption is returned to adsorb gold, gold in a pregnant solution obtained after desorption is extracted with a diaphragm electrodeposition method, a barren solution obtained after electrolysis is returned and used for desorbing the gold-loaded resin, and thus the technological process with the gold adsorption resin and the desorption solution reused is formed. When the method is applied to wastewater containing minor gold or trace gold, gold can be thoroughly recycled, and the gold residual in the barren solution can be reduced to 0.001 ppm and is almost zero.

Description

technical field [0001] The invention relates to a method for recovering gold from gold-containing wastewater, in particular to a method for recovering gold in situ by adopting a process of resin adsorption-gold-loaded resin desorption-diaphragm electrowinning. Background technique [0002] In recent years, the electronic information technology industry has developed rapidly, and the speed of upgrading electronic products is getting faster and faster. At the same time, with the improvement of people's living standards, the strong demand for gold-plated parts has led to a sharp increase in the amount of electronic waste and gold-plated parts waste. If the contained rare and precious metals are not recovered, it will not only cause serious pollution to the environment, but also cause a great waste of resources. The development of the above-mentioned industries will produce a large amount of gold-containing waste water, such as: waste plating solution produced during electropla...

Claims

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Application Information

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IPC IPC(8): C02F9/06C22B7/00C25C1/20C02F101/20
CPCC02F1/42C02F1/461C02F9/00C02F2101/20C22B7/006C25C1/20Y02P10/20
Inventor 吴思国张谦吴志宇陈福明
Owner 深圳市世清环保科技有限公司
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