... High solubility, drying, 40%-50% of solid content of poly-aluminium chloride solution introduced in the high pressure pump, through pressure ... to avoid moisture, moisture can still use, in effect unchanged.Areas of application of poly-aluminium chloride:1, water: domestic water, ... , low cost.2, good solubility, high activity in condensed form of alum in the water, faster settlement, 2-3 times stronger ...