Patent ID: 7001454

Claim:
A white portland cement clinker, with the capacity to fix sulfur derived from an organic fuel having a high sulfur content, greater than 5% S, used as a fuel in the calcination of said clinker, said clinker additionally exhibiting reduced fuel consumption during such calcination and useful for producing a fast setting cement, and comprising amounts of clinker phases in percentage by weight, as follows: 3CaO.SiO 2 (C 3 S): 40 to 75, 2CaO.SiO 2 (C 2 S): 10 to 35, 3CaO.Al 2 O 3 (C 3 A): 0 to 15, CaO.SO 3 (C{hacek over (S)}): 0 to 10, 4CaO.3Al 2 O 3 .SO 3 (C 4 A 3 {hacek over (S)}): 2 to 15, 11CaO.7Al 2 O 3 .CaF 2 (C 11 A 7 .CaF 2 ): 0 to 5, Total % CaF 2 : 0.3 to 1.5 measured as CaF 2 , % Fe 2 O 3 : 0 to 0.5, and a SO 3 content between 1.5 and 5% by weight obtained through the calcination of a raw meal comprising CaO, SiO 2 , Al 2 O 3 and CaF 2 , and using an organic fuel with a sulfur content higher than 5% as the main source of the clinker's SO 3 content, at temperatures between 2192° F. and 2462° F. without the addition of any SO 3 -containing additive to the raw meal as a main source of SO 3 content in the clinker.