采用热力恘软件FactSage7.0研究了某含硫砷金矿焙烧的热力恘行为,探索一段焙烧脱除硫和砷的可行性.模拟结果表明,在较窄的氧含量范围内,可在较宽温度范围内实现硫、砷的一段焙烧脱除;氧含量过高时,改变焙烧温度不能实现硫和砷的同时脱除;通过添加适量的碳、或通入一氧化碳,可还原硫酸盐和砷酸盐,提高硫和砷的一段焙烧脱除率.%The thermodynamic behavior of roasting a sulfur and arsenic-bearing gold ore was simulated by the thermodynamic software FactSage7.0, and the feasibility of removing sulfur and arsenic via one-stage oxidative roasting was explored. The simulation results demonstrate that under an appropriate content of oxygen the simultaneous removal of sulfur and arsenic can be achieved effectively at a relatively wide range of roasting temperature. However, when excessive oxygen is present, it is thermodynamically impossible to eliminate both elements simultaneously and effectively only by adjusting the roasting temperature. Adding carbon or injecting carbon monoxide during roasting will facilitate the removal of sulfur and arsenic, because they will reduce sulfates and arsenates.
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