Slag cement is produced by grinding blast furnace slag, a byproduct of steel production that has hydraulic properties, with clinker and gypsum. This allows slag and clinker to be blended in a 60:40 ratio to produce slag cement. A one million ton slag cement plant only requires a 1500 ton per day kiln capacity, significantly less than a standard cement plant. The document discusses slag cement manufacturing and provides information on project feasibility reports and companies in the slag cement industry.