Patent ID: 6033467
Filing Date: 2000-03-07
Classification: C04B,C22B,Y02P,Y02W

Abstract:
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, andmixing the ground slag cement with Portland cement in a ratio of at least about 0.5:1 by weight to produce a blended cement.