硫酸铝钾对天然硬石膏水化的激发机理研究

摘要

Directed at the properties of mineral processing wastewater of Daxigou siderite ore in Shanxi province ,the flocculent sedimentation effect is studied by controlling the rational proportioning of lime milk and different flocculants such as PAM, PAC, SPFS, starch and alum. The result showed quality of the purified water reaches national grade- one standard of wastewater discharge (GB8978 -1996) by adding lime milk and the floceulant PAM to treat the mineral processing wastewater.%本文采用明矾(KA1(SO4)2·12H20)和煅烧明矾(Kal(SO4)2)作为天然硬石膏水化的激发剂,探讨了硫酸铝钾对天然硬石膏水化的激发机理.结果表明:煅烧明矾对天然石膏的水化激发效果更明显,明矾与天然硬石膏生成水化中间产物K2Ca(SO4)2·H2O复盐,煅烧明矾与天然硬石膏生成水化中间产物K2Ca(SO4)2·H2O和K3Ca(SO4)2复盐.明矾加人量为5%时,3d水化率达到45.1%;煅烧明矾加人量为6%时,3d水化率达到61.5%.