Effect of Using CaCl2 and MgSO4 Compound Reagent Treating Coal-Washing Wastewater and Its Mechanism

摘要

Abstract-A new reagent is compounded by CaCl2 and MgSO4. It is determined through experiments that the proper mass ratio of CaCl2 and MgSO4 is 1:1. The optimum technical conditions which use CaCl2 and MgSO4 compound reagent to treat coal-washing wastewater are determined by the orthogonal experiment. The experimental results in laboratory are proved to be feasible through experiments in production. After analysing, we think that the coagulation mechanism of CaCl2 and MgSO4 compound reagent treating coal-washing wastewater does not comletely comply with DLVO theory. Resulting from many aspects related to each other.