DOC《脱除某难处理金矿中砷和硫的研究》

4 结论 1)对安徽某高含砷含硫难处理金矿首先于高纯氩气气氛中在高温下脱砷的优化工艺条件为:脱砷温度600 ℃、时间2 h、氩气流量200 mL/min.在此优化条件下,脱砷率和脱硫率分别为98%和26%,矿中挥发除去的物质为纯As2O3. 2)优化脱砷后,在温度650 ℃、氧气流量200 mL/min、脱硫时间2 h的优化条件下脱硫率可以97%,矿中硫降至1.59%,脱硫前矿中硫以Fe1-xS和FeS2形式存在,脱硫后转变成SO2和Fe2O3. 参考文献 [1] Zhou J, Jago B, Martin C. Establishing the process mineralogy of gold ores[J]. Technical Bulletin,2004(3):1-16. [2] Senanayake G. A review of effects of silver, lead, sulfide and carbonaceous matter on gold cyanidation and mechanistic interpretation[J]. Hydrometallurgy,2008,90(1):46-73. [3] Liu G, Yen W. Effects of sulphide minerals and dissolved oxygen on the gold and silver dissolution in cyanide solution[J]. Minerals engineering,1995,8(1):111-123. [4] Dai X, Jeffrey M I. The effect of sulfide minerals on the leaching of gold in aerated cyanide solutions[J]. Hydrometallurgy,2006,82(3/4):118-125. [5] Swash P. A mineralogical investigation of refractory gold ores and their beneficiation[J]. Journal of the South African Institute of Mining and Metallurgy,1988,88(5):173-180. [6] 谭希发. 难处理金矿的热压氧化预处理技术[J]. 有色金属(冶炼部分),2012(9):38-43. [7] 郭持皓,李云,王云,等. 从难处理含砷金矿中湿法回收砷[J]. 有色金属(冶炼部分),2012(5):8-10. [8] 张泽彪,张正勇,彭金辉,等. 难处理金精矿半工业化提金试验研究[J]. 有色金属(冶炼部分),2008(6):24-26. [9] 李云,袁朝新,王云,等. 难处理砷金矿原矿焙烧试验研究[J]. 有色金属(冶炼部分),2005(2):21-23. [10] Dunn J G, Chamberlain A C. The recovery of gold from refractory arsenopyrite concentrates by pyrolysis-oxidation[J]. Minerals Engineering,1997,10(9):919-928. [11] Hasab M G, Rashchi F, Raygan S. Simultaneous sulfide oxidation and g........