distillation oxidation roasting
用真空蒸馏法处理高砷金精矿焙砂和常规氧化焙烧脱砷率相近的焙砂相比，在金的浸出方面具有相同的效果。
The results of gold recovering from the calcines with approximate arsenic content by vacuum evaporation or by normal oxidation are same.
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