中文摘要：

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-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。

英文摘要：

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.