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当硫化物颗粒中存在有细粒浸染状的金时,焙砂的孔隙度和比表面决定着溶液在含金颗粒中的渗透,因此它们对金的浸出会产生强烈的影响。基于对从400—750℃温度范围内Fe-O-S三元素的相稳定图的分析,讨论了在黄铁矿氧化过程中化学(物相)转变的顺序。用扫描电子显微镜、X射线衍射和BET气相吸收等方法,研究了含金黄铁矿-毒砂精矿和纯黄铁矿样品在400—750℃范围内,在80％N_2和20％O_2的氧化焙烧气氛下的化学和结构变化。研究结果表明,当焙烧
When fine-grained gold is present in the sulfide particles, the porosity and specific surface area of the calcine determine the solution’s infiltration into the gold-containing particles and therefore they strongly influence gold leaching. Based on the analysis of the phase stability diagrams of the three elements of Fe-O-S in the temperature range of 400-750 ℃, the order of chemical (phase) transformation in the pyrite oxidation process is discussed. The results of scanning electron microscopy, X-ray diffraction and BET gas-phase spectroscopy showed that the samples containing gold pyrite, arsenopyrite and pure pyrite were oxidized in the range of 400-750 ℃ with 80% N 2 and 20% O 2 Chemical and structural changes under roasting atmosphere. The results show that when roasted