refractory gold meaning in English

顽金(不容易用混汞法回收的自然金)

A study on process of pellet - enveloping - roasting for pretreating refractory gold concentrate
轻烧高铝矾土制备超细粉料的工艺
Biooxidation pretreatment technology for refractory gold ores and its commercial application
难处理金矿的生物预氧化技术及工业应用
Alkaline pre - oxidation for refractory gold arsenosulfide concentrates under normal temperature and pressure
难浸砷金精矿的碱性常温常压预氧化
Acidic pressure - oxidation pretreatment of the refractory gold concentrate in kwekwe roasting plant , zimbabwe
焙烧厂难处理金精矿的酸性压力氧化预处理
Cy alkaline pretreatment for refractory gold floatation concentrate of anidation tailings under normal temperature and pressure
难浸氰化尾渣浮选精矿的常温常压碱浸预处理

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