高硫铝土矿浮选除硫的工艺  

Flotation Process for Desulfurization of High Sulfur Bauxite

作　　者：王晓民[1] 张廷安[1,2] 吕国志[1] 鲍丽[1] 吕滨[3] 蒋孝丽[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]多金属共生矿生态化利用教育部重点实验室,辽宁沈阳110004 [3]东北大学理学院,辽宁沈阳110004

出　　处：《稀有金属》2009年第5期728-732,共5页Chinese Journal of Rare Metals

基　　金：国家自然科学基金项目(50644016;50704011);国家973项目(2007CB13504);教育部高校博士点基金项目(20050145029);辽宁省优秀青年科技人才基金项目(2005221012)

摘　　要：针对我国铝土矿矿石保有储量较低,部分铝土矿因硫含量较高而无法应用于工业生产这一现状,采用浮选手段,针对我国含硫一水硬铝石型铝土矿进行脱硫实验研究。采用单因素实验,研究了高硫铝土矿在浮选剂乙黄药作用下反浮选除硫的工艺条件。重点考察了浮选剂用量、浮选时间、浮选矿浆浓度、pH值及矿石粒度对浮选的影响,得出了反浮选除硫的最佳工艺条件:pH=12,浮选剂用量为0.4kg.t-1,浮选搅拌时间15min,矿浆浓度10%,矿石粒度小于0.09mm。在最佳工艺条件下,可以将铝土矿含硫量由2.08%降低到0.65%,硫含量降至符合我国氧化铝工业对矿石中硫含量的要求。同时氧化铝的回收率可达91.46%。动力学研究表明,乙黄药对硫化矿的浮选除硫符合Langmuir吸附原理。In allusion to low deposition and high sulfur content of bauxite in China, flotation process for desulfurization of high-sulfur diasporic bauxite and ethyl xanthate as collector was developed , and the effects of flotation time, pulp density, pH value and particle size of ores were examined. The results indicated that sulfur content in bauxite was successfully decreased through flotation. The best conditions of flotation for desulfurization were pH = 12, collector dose of 0.4 kg.t^-1, flotation time of 15 min, pulp density of 10%, particle size of 0.09 mm. The content of sulfur was reduced from 2.08% to 0.65%, and the recovery rate of Al2O3 was 91.46%. Kinetics of flotation for desulfurization showed that the flotation kinetics complianced the principle of Langmuir chemical adsorption.

关 键 词：铝土矿 浮选 脱硫 乙黄药 浮选动力学 

分 类 号：TF803.21[冶金工程—有色金属冶金]