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天然石英砂含有各种各样的含铁和黏土矿物,它们覆盖在硅酸盐颗粒表面上或者是浸染在硅酸盐基质中。联合使用生物浸出工艺和磁选法可以显著地提高石英砂的质量。为将石英颗粒内部间隙中的杂质分离出来,用细菌分解蒙脱石是必需的。采用生物浸出法从诸如石英砂这样的工业矿物中分离杂质会涉及到硅酸盐基质,这就是Genus Bacillus菌属的硅酸盐异养细菌具有潜在用途的原因。用溶液样品的化学分析和细菌产物CO2分析来监控石英砂生物浸出过程中铁垢还原活动,以及优化石英砂生物浸出的条件。试验结果表明,铁溶解的速度与Bacillus spp.菌属的种类有关。还原铁的Bacillus spp.细菌细胞悬浮液内的醌促进了石英砂中Fe(Ⅲ)的还原。在糖蜜存在的情况下,铁溶解率较高。生物浸出使取自a tin Stra e矿床的石英砂含铁量降低了60%,后续的磁选处理使样品铁含量降低了92%。采用生物浸出和磁选法除铁获得了高质量的白色原料。该工艺需要控制细菌还原铁的条件,并且取决于杂质矿物的矿物组成。
Natural quartz sand contains a wide variety of iron and clay minerals that coat the surface of silicate particles or are impregnated into the silicate matrix. The combination of bioleaching and magnetic separation can significantly improve the quality of quartz sand. In order to separate the impurities in the internal space of the quartz particles, it is necessary to decompose the montmorillonite with the bacteria. The use of bioleaching methods to separate impurities from industrial minerals such as quartz sand involves silicate matrices, which is why the genus Bacillus of Genus Bacillus has potential uses. The chemical analysis of the solution sample and the CO2 analysis of the bacterial product are used to monitor the iron reduction activity during the bioleaching of quartz sand and to optimize the bioleaching conditions for quartz sand. The experimental results show that the rate of iron dissolution is related to the species of Bacillus spp. Reduced iron Bacillus spp. Quinones in bacterial cell suspensions promoted the reduction of Fe (III) in quartz sand. In the presence of molasses, the iron dissolution rate is higher. Bioleaching reduced the iron content of quartz sand from the a tin Stra e deposit by 60% and the subsequent magnetic separation reduced the iron content of the sample by 92%. Bioleaching and magnetic separation of iron to obtain high-quality white raw materials. This process requires the control of bacterial reducing iron conditions and depends on the mineral composition of the impurity minerals.