Closed circulation active carbon adsorption system

Abstract

The present invention discloses a closed circulation active carbon adsorption system, wherein a closed active carbon adsorption column is adopted as a basic adsorption unit, and a plurality of the basic adsorption units are connected in series to form a closed circulation, which is provided for recovery of gold from a gold-containing solution. According to the system, the system can not be affected by landform and is especially suitable for a flatland layout, and no adsorption cascade table is required to be specially arranged, such that the cascade preparation manner of the traditional adsorption column is completely changed; the counter current carbon series connection manner is changed, and change of inlet and outlet manners of the extracted gold pregnant solution can be achieved only by adopting adjustment of control of valve opening and valve closing in a system pipeline. With application of the system of the present invention, quality and adsorption rate of gold loaded carbon in gold production can be completely improved, the cascade counter current carbon series connection manner in production can be changed, the adsorption operation manner without carbon series connection can be achieved, the labor intensity of workers can be effectively reduced, the process can be simplified, the gold recovery rate can be improved, the whole economic benefits of the mine can be improved, and the production cost can be reduced. In addition, the system has characteristics of safety, reliability, easy preparation, flexible operation and variable scale.

Description

technical field [0001] The invention relates to a system for recovering gold from heap leaching gold-containing solutions in gold production, in particular to a closed-circuit activated carbon adsorption system. Background technique [0002] Because of its excellent physical and chemical properties, gold has been loved by people since ancient times, especially because it is easy to divide, not corroded by general chemicals, easy to store, high value and high value preservation performance, and it is favored by people as an international coin. . Since 2003, the international financial crisis has occurred frequently. The high value preservation function of the gold exchange and the characteristics of the hard currency for international settlement have made its price rise all the way, and once broke through the record high of 1,877 US dollars per ounce, which greatly promoted the development of the gold industry. At the same time, with the application of high-efficiency and la...

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Problems solved by technology

[0003] At present, the systems used for activated carbon to adsorb gold from heap leaching gold-containing solutions at home and abroad are mainly: multi-slot cascade adsorption countercurrent series carbon system and small tower adsorption system. They mainly have the following disadvantages: cascade arrangement, reverse series carbon, infrastructure costs High, poor safety, gold recovery rate needs to be further improved, low adsorption efficiency, low grade of gold-loaded carbon, large amount of gold-loaded carbon to process, high production cost, high labor intensity, inflexible and convenient operation, difficult carbon extraction, treatment The quantity is small and the environment is not friendly, so it is difficult to well meet the needs of existing actual production

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