Patent ID: 8586817
Filing Date: 2013-11-19
Classification: B09B,C09K

Abstract:
1. A process for controlling acid rock drainage from carbonate-free pyritic rock formations, the process comprising: providing water; providing solids in the form of powders of limestone, separate powders of clay and separate powders of magnesium oxide; mixing the water and the solids to form a slurry having a solids content between 10 to 75 wt % with between 40 to 75 wt % of the limestone powders, 10 to 35 wt % of the separate clay powders and 10 to 30 wt % of the separate magnesium oxide powders; allowing the magnesium oxide powders to react with the water to form 15 to 45 wt % of separate magnesium hydroxide powder in the slurry; and applying the slurry to carbonate-free pyritic rock formations.