Composition to control acid rock drainage
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United States of America Patent
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Apr 2, 2013
Grant Date -
Sep 11, 2008
app pub date -
Feb 25, 2008
filing date -
Mar 7, 2007
priority date (Note) -
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Abstract
A composition to control acid rock drainage is provided. The composition includes a slurry made from water and solids, the solids containing powders of limestone, clay and magnesium oxide or magnesium hydroxide. In some instances, the slurry is thixotropic and contains between 10 to 75 weight percent of solid powders. The solid powders can include between 40 to 75 weight percent limestone, 10 to 35 weight percent clay and 10 to 30 weight percent magnesium oxide or a proportional concentration of magnesium hydroxide.
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