浑浊红球菌对锡石的浮选性能及作用机理

Flotation Performance and Separation Mechanism of Cassiterite with Rhodococcus Opacus

研究了以浑浊红球菌为微生物浮选捕收剂时锡石、方解石和石英砂纯矿物的浮选回收率。结果表明,在pH=4、浑浊红球菌浓度1.24 g/L时,3种矿物的回收率分别为82.07%、45.42%和13.66%。通过表面电位和表面张力测定等手段探究了浑浊红球菌捕收剂分子与锡石表面作用机理。并以浑浊红球菌为捕收剂、水玻璃为抑制剂,对实际锡矿进行了开路浮选实验,锡精矿锡品位由3.98%提高到了23.83%。

Rhodococcus opacus(R opacus) was taken as a microbe collector in a flotation experiment to investigate the recoveries of cassiterite, calcite and quartz pure minerals. The results show that, with pulp pH as 4 and R opacus dosage as 1.24 g/L, the recoveries of these three minerals were correspondingly 82.07%, 45.42% and 13.66%. The interaction mechanism between R opacus and cassiterite was investigated by measuring zeta potential and surface tension. Finally, an open-circuit flotation experiment of tin ore was carried out with R opacus as the collector and sodium silicate as the depressant, showing that the grade of tin concentrate was improved from 3.98% to 23.83%.