Patent ID: 6054074
Filing Date: 2000-04-25
Classification: C04B,Y10S

Abstract:
Method of producing manufactured aggregates from a combustion by-product comprising:(a) providing combustion by-products which contain sulfur;(b) providing recycle dry fines containing calcium hydroxide (Ca(OH).sub.2);(c) providing an aluminum-containing material;(d) providing water;(e) mixing the recycle dry fines containing calcium hydroxide, combustion by-product, aluminum-containing material, and the water to form a feed mix; then(f) agglomerating the feed mix into an agglomerated product; then(g) combining the agglomerated product with curing fines which contain calcium oxide and which produces a blended mix; then(h) curing the blended mix to form the aggregates and create recycle dry fines for recycling, during which moisture in the blended mix exothermally hydrates calcium oxide in the blended mix to form a dry calcium hydroxide-containing material and autogenically provides all of the required heat for curing and no external heat is required; then(I) separating the aggregates and the recycle dry fines; and(j) recycling the recycle dry fines containing calcium hydroxide to the mixing step.