次氯酸钠高碱高盐氧化分解贵州某难处理金矿载金硫化矿的研究

在我国南方广泛发育着产在富亩有机质的海相细粒碳酸盐型沉积碎屑岩系的碳质难处理金矿在这类金矿中金以微细粒自然金赋存在黄铁矿等载金矿物中，常规氰化难以浸出，浸出率大约为10% 。去除载金硫化矿物的包裹干扰是实现金浸出的有力措施．次氯酸钠作为一种强氧化剂特别适台碳酸盐岩矿浆舟质中氧化分解硫化矿去除金浸出的包裹干扰。黄铁矿的氧化分解受有效氯浓度、氯化钠浓度、液固比及pH等多种因素的干扰，经次氯酸钠氧化分解后，金的包裹干扰已基本消除，金的浸出率可达85%

Oxidation of loading-gold sulfides with sodium hypochlorite from one refactory gold deposit in Guizhou province in the condition of high basicity and salinity

There exists many refractory gold deposites occuring in the clastic carbonaceous rocks richeniag organic compounds in sea facies、Gold exist as micrograaual inclusion in the loading-gold minerals：pyrites and carbons．Gold caa。t be leached by traditional leaching method with cyanides，and the leaching ratio is about 10 、Eliminating the inclusion of laoding-gold sulfides is a powerful measure to make gold dissolve，sodium hypochlorite is a oxidant adapting to oxidize and decompose sulfides to liminate inclusions to leach gold in carbonaceous pulp．The oxidation of pyrites is influenced by the concentrations of NaClO and NaCl，solution-solid ratio and pH．After the sulfides is decomposed by sodium hypochlorite，gold is exposed to be leach by sodium hypochlorite，the leaching ratio is up to 85%．