Patent ID: 8895486
Filing Date: 2014-11-25
Classification: C04B,C09K,E21B,Y02W,Y10T

Abstract:
1. A method comprising: individually grinding a cementitious component consisting essentially of a partially calcined kiln feed removed from a gas stream, wherein the partially calcined kiln feed has an original mean particle size, wherein the cementitious component was ground to reduce the original mean particle size of the partially calcined kiln feed to a size of about 15 microns or less, wherein the original mean particle size of the partially calcined kiln feed was reduced by about 25% or more by the grinding, and wherein the partially calcined kiln feed comprises SiO2, Al2O3, Fe2O3, CaO, MgO, SO3, Na2O, and K2O; and mixing the ground partially calcined kiln feed with a hydraulic cement.