Abstract
Introduced the current situation of coal slurry difficult sedimentation because of clay easily expansion and hydration to form colloidal suspensions. Experiments of suppressing montmorillonite using several different electrolyte solution was done. The results show that KCl solution can inhibit expansion and hydration of montmorillonite and improve its sedimentation effect significantly and reduce the amount of flocculant greatly. After raw coal sedimentation comparative test, the results show that washing coal by KCl solution can indeed promote coal slurry sedimentation effectively, and the dosage of flocculant is only about 2.5% that of water washed coal.
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