在难浸金矿加熟石灰固砷、固硫焙烧预处理工艺的基础上，提出了选择性固砷焙烧新工艺。热力学分析表明，加入钙盐选择性固砷焙烧是可行的，钙盐的加入可减少甚至避免Ｆｅ２（ＳＯ４）３和ＦｅＡｓＯ４的形成，而且３ＣａＯ·Ａｓ２Ｏ５比ＣａＳＯ４更稳定，即３ＣａＯ·Ａｓ２Ｏ５比ＣａＳＯ４更易形成。试验研究结果表明，对于含砷１２１％，硫２０９９％、锑１３４％、碳３２６％的金精矿，经选择性固砷焙烧预处理，砷的固定率可达到９２％，而７８％～８４％的硫则以ＳＯ２气体挥发，金浸出率为９２％左右。 Based on the refractory gold ores with hydrated arsenic and the sulfur pretreatment, a new process of selective solidification of arsenic was proposed. Thermodynamic analysis shows that the addition of calcium salt is feasible for solid arsenic roasting. The addition of calcium salt can reduce or even avoid the formation of Fe2 (SO4) 3 and FeAsO4, and 3CaO · As2O5 is more stable than CaSO4, that is, 3CaO · As2O5 is easier than CaSO4 form. The experimental results show that for the gold concentrate containing 121% arsenic, 2099% sulfur, 134% antimony and 3.26% carbon, the fixation rate of arsenic can reach 92%, while 78% ~ 84% of the sulfur is SO2 gas volatilization, gold leaching rate of about 92%.