Method of making cement from base metal smelter slag
AssigneeFenicem Minerals Inc.
InventorDavid Krofchak
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Abstract
Cement is made from base metal smelter slag produced by a nickel, copper, lead or zinc smelter. The slag is ground to a size within the range of from about -250 to about 425 mesh to produce ground slag cement, and the ground slag cement is mixed with Type 3 high early strength Portland cement in a ratio of at least about 0.5:1 by weight to produce a blended cement.
Claims4
A method of making cement from base metal smelter slag produced by a nickel, copper, lead or zinc smelter, said slag containing by weight from about 15 to about 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 slag to a size within the range of from about -250 to about 425 mesh to produce ground slag cement, and mixing the ground slag cement with Type 3 high strength Portland cement in a ratio of at least about 0.5:1 by weight to produce a blended cement.
Dependencies are inferred from the claim text.