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方铅矿是铅的主要原生矿物,但总伴生有相当数量的银,成为综合利用提取银的主要来源.矿石中的自然银经常呈显微的颗粒并且十分分散,因此它又容易被其主要矿物一方铅矿连生和包裹.所以要进行方铅中自然银的物相分析,必须首先把方铅矿打开,使被包裹的自然银裸露出来.为此,所选择打开方铅矿的溶剂,必须对自然银是不溶或溶解很少的.通常打开方铅矿的溶剂为EDTA—NH_4OH—H_2O_2,但实验证明它对金属银的溶解很大.本文对三种溶剂在打开方铅矿、保留自然银方面作了比较,最后选定了较理想的溶剂.其次在分离自然银,由于三价铁盐溶剂在硫化矿中存在浸取
Galena is the lead primary mineral, but there is always associated with a considerable amount of silver, a comprehensive utilization of silver extraction of the main source of natural ores in silver is often microscopic particles and very dispersed, so it is easy to be its main Mineral galena with raw and parcel, so to conduct the phase analysis of natural silver in the lead, you must first open the galena, so that the wrapped natural silver bare exposed.To this end, the choice of open galena solvent , Must be insoluble or dissolved in natural silver is very small, usually open the galena solvent EDTA-NH_4OH-H_2O_2, but the experiment proved that it is very soluble in metallic silver.In this paper, the three solvents in the open galena, To retain the natural silver were compared, the final selection of the more ideal solvent.Secondly, in the separation of natural silver, due to the presence of ferric salt solvent leaching sulfide ore