(哈薩克國立工業(yè)大學(xué)，阿拉木圖 480013
中南工業(yè)大學(xué)，長沙 410083)
摘 要: 將黃鐵礦、砷黃鐵礦和含砷金精礦與碳酸鈉和碳混合，進(jìn)行了氧化焙燒的理論分析和試驗研究。結(jié)果表明，在723～973K溫度范圍內(nèi)，黃鐵礦和砷黃鐵礦中的硫和砷氧化生成非揮發(fā)水溶性硫酸鈉和砷酸鈉。當(dāng)用水浸出焙砂時，砷和硫全部轉(zhuǎn)入溶液中。水浸渣用二氧化硫氣體處理后，用氰化法浸出殘渣，可使金的回收率達(dá)95.5%～96%。
關(guān)鍵字: 含砷精礦 黃鐵礦 砷黃鐵礦 碳酸鈉 氧化焙燒
（Kazakh National Technical University,Repubilc of Kazakhstan,Almaty 480013
Central South University of Technology, Changsha 410083, P. R. China）
Abstract:Theoretical and experimental data showed that if pyrite, arsenopyrite or arsenic-gold concentrates, are mixed with sodium carbonate and carbon, and then roasted, sulfur and arsenic can be transformed into sulfate and arsenate at temperature 723～973K. Sulfate and arsenate are soluble and the residues can be treated with SO2 and then with cyanide. The recovery rate for gold can reach 95.5% to 96%.
Key words: arsenic-glod concentrates pyrite arseno pyrite sodium carbonate oxidizing roasting
