FeAsS、FeS_2、、Au的NaClO-NaOH体系热力学分析与金的一步浸出  

THERMODYNAMIC ANALYSIS OF FeAsS, FeS_2, Au IN NaClO-NaOH SOLUTION AND ONESTEP LEACHING OF GOLD

作　　者：王淀佐[1] 邱冠周[2] 徐竞[2] 

机构地区：[1]北京有色金属研究总院 [2]中南工业大学矿物工程系

出　　处：《有色金属》1998年第1期40-44,共5页Nonferrous Metals

摘　　要：ＮａＣｌＯ碱性体系处理含砷难处理金矿的研究已有报道，但无论从机理上还是从工艺指标上来讲都有待于深入研究。本文初步分析了金在ＮａＣｌＯ强碱性体系中的热力学行为，不同ｐＨ值下金酸的溶液化学平衡。采用瓷球磨机，边磨边反应，消除氢氧化物固体生成物层对反应的阻止作用，实现Ｆｅ－ＡｓＳ、ＦｅＳ２的破坏分解和金的浸出同时进行，实现广西某选厂含砷金精矿金的一步浸出，金的浸出率在２０ｍｉｎ内达到９１．９％。Although pretreatment of refractory gold ores with sodium hypochlorite was studied, its mechanism and technology were not clear yet Reaction thermodynamics of arsenopyrite, pyrite and gold with sodium hypochlorite in NaOH medium and solution chemistry of H_3AuO_3 at different pH values were analyzed The obstruction of metal hydroxide solid layer formed during oxidation of sulfide minerals in alkaline media was eliminated by grinding in porcelain ball mill 91.9% of gold were extracted by one-step leaching in 20 minutes from concentrates containing arsenic in Guangxi Zhuang Autonomous Region

关 键 词：Gibbs自由能 平衡常数 金精矿 次氯酸钠 

分 类 号：TF831.032[冶金工程—有色金属冶金]