The pretreatment of arsenical refractory floatation gold concentrate was studied. 研究了含砷难浸浮选金精矿的预处理。
Nitrate process is a new technology to pretreat refractory arsenical ores, and has made considerable progress in the process development. 硝化法预处理含砷难冶金矿石是一种新工艺,并在过程开发方面取得重要进展。