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河南皇城山银矿属产于陆相火山岩、次火山岩中的中低温热液矿床,分布在酸性熔岩与火山碎屑岩接触带.地表氧化-半氧化带的矿石组成较简单,但银矿物的嵌布粒度细,部分呈胶体状态银分布在脉石矿物中.浮选效果不佳,银的回收率仅48.5%,采用全泥氰化-硫化钠沉淀-活性炭吸附流程,取得了比较好的技术指标.试验中发现,在细磨情况下,银的氰化浸出率随磨矿细度的增加而降低,若在磨矿
The Huangchengshan silver deposit in Henan is a medium- and low-temperature hydrothermal deposit in continental volcanic rocks and subvolcanic rocks distributed in the contact zone between acidic lava and volcaniclastic rocks.The surface composition of the oxidized-semi-oxidized belt ore is relatively simple, but the silver mineral Of the fineness of the distribution of cloth, part of the silver was colloidal distribution of gangue minerals in the flotation effect is poor, the silver recovery rate of only 48.5%, with all mud cyanide - sodium sulfide precipitation - activated carbon adsorption process, and made better Of the technical indicators.Experiments found that in the case of fine grinding, silver cyanide leaching rate decreases with the increase of grinding fineness, if grinding