我国氧化矿石银的赋存状态研究

通过我国氧化矿石伴生银赋存特征的系统研究后指出,银以独立银矿物为主,少量为离子吸附银和类质同象银。银矿物组合及矿化系列、产出形态、结构、粒度及嵌布类型与原矿的成矿溶液性质和氧化程度有关。铅、锌、铁氧化物和残留的硫化物是银的主要载体矿物。银的配分受矿石氧化强度、矿物组合及嵌布形式控制。这一研究成果为有效提高银的回收率提供了科学依据。

A Study on the Occurring States of Ag in the Oxidized Ores in China

A systematic study on the occurrences and association states of silver in the oxid ores in China has been carried out in this paper.It is indicated that silver is mainly existed as independent silver minerals in oxide ores.Only little part of silver occurred occasionally as ion absorption or substitution in other minerals.The silver mineral assemblages and mineralization series,and shapes,textures,grain size,distribution features of the silver minerals are closely related to the nature of ore-forming fluids and the oxidation degrees of the primary ores.The Pb,Zn,Fe oxides and residual sulfides are the main carrier minerals of silver.The partitioning of silver in ores is controlled by the oxidation intensity of ores,silver mineral associations and distribution features in ores.This will be helpful for improving the silver recovery from the ores.