某含砷金精矿的焙烧氰化浸出工艺研究

Investigation of the Roasting-cyanidation-leaching Technology for an Arsenic-containing Gold Concentrate

采用化学物相分析法定量地研究了含砷金精矿及其焙砂中金的化学物相及其含量的变化 ,并对该精矿的焙烧及其氰化浸出过程进行了研究。介绍了焙烧温度和停留时间对该精矿的脱砷率和脱硫率以及浸出时间、氰化钠浓度、氧化钙浓度、液固比等对焙砂中氰化浸金率的影响。在最佳浸出条件下 ,其氰化浸金率可达到 82

Chemical phase analysis method was used in the quantitive study of the arsenic-containing gold concentrate,the chemical phase of the gold in roasted product and the variation of gold content.The roasting and the cyanidation-leaching processes of this concentrate, the effect of the roasting temperature and retention time on the dearsenication and desulphuration rates and the effect of the leaching time,the densities of sodium cyanide and calcium oxide and the liquid-solid ratio on the gold leach rate of the roasted product were studied.Under the optimum leaching conditions,the gold leach rate could be over 82%.