While the reduction of the initial oxidized products on pyrite surface such as polysulphide and free sulphur can improve its hydrophilicity.
同时，黄铁矿表面初始氧化产物如单质硫和多硫化物被还原，亲水性增强。
2
The production technique for the crystal calcium polysulphide produced in China at present respectively adopts the crystal parent solution cyclic utilization method.