T/GSQN 018-2023 Chloroauric acid mud

Scope

Main technical content: During the gold smelting process, a large amount of cyanide leaching slag is generated. Due to the residual cyanide leaching agents in the cyanide leaching slag, it belongs to hazardous solid waste, and its storage, transportation, and disposal require strict management, which brings significant environmental and economic pressure to enterprises. However, the cyanide leaching slag generally contains a certain amount of precious metals such as gold and silver, as well as base metals such as lead, zinc, copper, and iron, which have certain economic value. Therefore, the comprehensive recovery and utilization of cyanide leaching slag has always been a key area supported by national policies and a research hotspot in the industry. Generally, cyanide leaching slag can be pre-processed by ore dressing enrichment-roasting, re-grinding dissociation, and magnetized roasting-dressing to improve the cyanide leaching rate of gold and silver. However, for the roasted cyanide leaching slag of the concentrate, the gold that is not leached and remains in the slag is generally wrapped by gangue and hematite, making it difficult to effectively recover gold and silver by the above methods.

Development Information

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