Walter A D Rowe

US Patent:

40544648, Oct 18, 1977

Filed:

Jul 20, 1976

Appl. No.:

5/706942

Inventors:

Ernest B. Thorn - Dallas TX
Charles W. Grube - Dallas TX
Walter W. Rowe - Dallas TX
Johann A. Schueler - Richardson TX

Assignee:

General Portland, Inc. - Dallas TX

International Classification:

C04B 738

US Classification:

106100

Abstract:

An improved process for making cement wherein aragonite, a natural orthorombic crystalline form of calcium carbonate, is employed in a substantially dry, naturally recovered, unprocessed state as the calcium carbonate constituent. The raw kiln feed of the aragonite and argillaceous materials can be introduced into the kiln together and/or separately to produce the desired raw kiln clinker feed within the kiln. The argillaceous material employed can be in a substantially dry state or can be present as an aqueous slurry.