采用化学物相分析方法,定量研究了石灰和焙烧气氛对银精矿加石灰焙烧过程中银的化学物相及其相对含量变化的影响,并借助热力学分析手段初步探讨了石灰在主要载银矿物的氧化、解离过程中的作用机制.结果表明:添加石灰能够大大地降低焙砂中的氧化物包裹银含量,如焙烧2 h后的氧化物包裹银含量由直接焙烧时的11.08%降到有石灰存在时的4.15%,而与焙烧气氛的关系不大.
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