Method of making cement or mine backfill from base metal smelter slag
AssigneeFenicem Minerals Inc.
InventorDavid Krofchak
Life of this patent
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Abstract
A method of making cement from base metal smelter slag produced by nickel, copper, lead or zinc smelter, includes grinding the slag with clinker and blast furnace slag to a size in the range of from about -250 to about 425 mesh to produce ground slag cement, and mixing the ground slag cement with Portland cement in a ratio of at least about 0.5:1 by weight to produce a blended cement.
Claims7
A method of making cement from base metal smelter slag produced by nickel, copper, lead or zinc smelter, said slag containing by weight from about 15 to 40% silica (SiO.sub.2), from about 35 to about 60% iron oxide (Fe.sub.2 O.sub.3) and from about 2 to about 20% calcium oxide (CaO), comprising:
- grinding the base metal smelter slag with clinker and blast furnace slag to a size in the range of from about -250 to about 425 mesh to produce ground slag cement, and
- mixing the ground slag cement with Portland cement in a ratio of at least about 0.5:1 by weight to produce a blended cement.
A method of making a binder for mine backfill from base metal smelter slag, said slag being produced by a nickel, copper, lead or zinc smelter and containing 15 to 40% silica (SiO.sub.2) from about 35 to about 60% iron oxide (Fe.sub.2 O.sub.3) and from about 2 to about 20% calcium oxide (CaO), comprising:
- grinding the base metal smelter slag with clinker and blast furnace slag to a size in the range of about -250 to about 425 mesh to produce ground slag cement, and adding from about 2% to about 60% by weight of a flocculating agent and tailings or sand to produce a binder for mine backfill.
Dependencies are inferred from the claim text.