车盘向斜南东翼铝土矿钪特征及综合利用前景

以重庆车盘向斜南东翼铝土矿含矿岩系为研究对象，通过电感耦合等离子体质谱法对41个样品的主量、微量元素进行了分析测试，探讨了钪的分布特征。研究发现：钪在铝土矿矿体及各岩石类型中的品位变化系数为50，属于不均匀的分布，在矿层底板铁质黏土岩中含量较高，顶板黏土岩次之；总体来说，含量高低与矿体厚度无关；钪常与铁和镁等元素发生类质同像置换，钪含量与Al、w(Al₂O₃)/w(SiO₂)、SiO₂均无相关性。从车盘向斜南东翼铝土矿含矿岩系Sc含量来看，大多已达到综合利用品位要求，初步选矿试验表明，在高铁铝土矿焙烧-化学预脱硅-拜尔法工艺与高硫铝土矿浮选脱硫-浮选脱硅-拜尔法工艺中，获取的钪初步富集物可经过除杂得到高纯氧化钪产品，钪回收率基本大于95%。因此，在生产铝土矿的同时，可试验回收伴生钪。

Characteristics and Comprehensive Utilization Prospect of Scandium in Bauxite Mine in Southeast Wing of Chepan Syncline

Taking the ore-bearing rock series of Bauxite in southeast wing of Chepan syncline of Chongqing as research object，the main content and trace elements of 41 samples were analyzed by adopting the inductively coupled plasma emission spectroscopy method and the distribution characteristics of scandium was discussed.The research results showed that the grade variation coefficient of scandium in bauxite and the rock types is 50，which are unevenly distributed.Then content of scandium in iron clay rock of seam floor is higher，following by the clay rock roof.In general，the content of scandium has no relationship with the ore-body thickness.Scandium often replaces iron and magnesium and other elements as isomorphous form.There has no correlation between scandium content and Al，w(Al₂O₃)/w(SiO₂)，SiO₂.According to the content of Sc in ore bearing rock series in bauxite in southeast wing of Chepan syncline，most of them reach the comprehensive utilization grade.The preliminary beneficiation experiment results show that the impurities can be removed from the preliminary enrichment so as to obtain high purity scandium oxide，and recovery of scandium is basically higher than 95% by adopting the process of high iron bauxite roasting，chemical pre-desilication，Bayer process with flotation desulfurization of high sulfur bauxite，flotation desilication and Bayer process.Therefore，the associated scandium can be recovered during production of bauxite.