我国铝土矿资源日趋贫乏，导致每年进口铝土矿生产的氧化铝占国内产量的40%以上，这不仅提高了氧化铝生产成本，同时也将威胁我国铝工业的生存和发展。而我国大量的高硫铝土矿没有获得应用。因而，加快开发和完善自主创新的高硫型铝土矿的基础应用研究、提高铝土矿资源利用率显得非常迫切。硫转入溶液的程度与高硫矿中硫的矿物形态及溶出条件等因素有关。因此，深入研究高硫铝土矿的矿物学特征、溶出规律、如何抑制硫进入溶液、硫在溶出过程的行为机制以及系统中硫存在形态对脱硫的影响规律是急需解决的重大科学问题。在获得高氧化铝溶出率的基础上，尽量降低硫的溶出率，进行适当的工序脱硫，并回收脱硫渣，为高硫铝土矿的开发应用奠定理论基础。该项研究不仅具有重大的社会和经济效益，而且对推动我国铝工业的发展、完善氧化铝生产技术具有重要的指导意义。

Bauxite resource has beenig poorness may lead to our country import many bauxite to produce alumina, which account for more 40% of total alumina product. It can increase not only the cost for producing alumina, but also influence the survival and development of our country aluminium industry. However, large numbers of high-sulfur bauxite are not obtained application in China. So it is urgent affair to speed up the development and perfect self-innovation technology for high-sulfur bauxite and increase utinization ratio of bauxite resource. The degree of sulfur entering solution related to sulfur shape of high-sulfur bauxite and leaching condition, and so on. So study deeply on mineralogy characteristic and leaching rule of the high-sulfur bauxite, how inhibitting the sulfur enter into solution, behavior mechanism of sulfur in leaching process, and the influence law of sulfur shape in alumina produce system to desulfuring are important science problem with urgent to be solved. We propose basis on obtaining high Al2O3 leaching rate, decrease sulfur leaching rate as possible, then choice suitable process for removal of sulfur, and recycling desulfuration residue for preparation of desulfurizer, thus theoretical foundation is established for exploitation and application of high-sulfur bauxite. The project research has not only important sociel and economic benefits, but also has guiding significance for promoting development of aluminium industry and perfecting technology of alumina producing in China.