某难浸含砷金精矿中金矿物嵌布粒度极细,有92.00％呈次显微金(不可见)的形式存在,且金矿物嵌存状态以包裹金为主,占94.58％.对金精矿进行常规氰化浸出,金的浸出率仅为3.41％.通过采用两段生物氧化预处理—氰化提金工艺,金的浸出率提高到95.02％,比常规氰化提高了91.61％.%The dissemination of gold mineral existing in the refractory arsenious gold concentrates is so fine that there are 92. 00 % of them taking the form of submicroscopic gold( not visible) ,and 94. 58 % of them are embedded inclusion gold. Conventional cyanide leaching of the concentrates only achieves a leaching rate of 3. 41 %. However, gold leaching rate can reach 95. 02 % after applying the two-stage biooxidation-cyanidation process, which is 91. 61% higher than conventional cyanide leaching process.
展开▼
