采用金相显微镜、SEM及EDS等方法对Ni80Cr20电热合金丝在钛行业还蒸炉中的脆断样品进行分析,发现丝材表面呈现＂痘状＂特征,晶界上有大......

某浮选金品位65．20g／t，含砷15．40％、硫25．64％。84％以上金被黄铁矿、毒砂和脉石包裹，为难浸金精矿。在常温常压下进行碱式预处理。再接氰化和......

The effect of treating algae-bearing water and induced odor by use of permanganate potassium composite (PPC) pre-oxidati......