Fine grains in the gangue suspension from a molybdenum ore dressing do not settle down because there is high concentration of sodium silicate (water glass) which is used in the beneficiating process.

• 钼矿选矿过程中使用了较高浓度的水玻璃,使得尾矿液中的细岩粉颗粒保持悬浮不沉,造成排放污染环境和回水浮选降低精矿回收率的问题。