Patent ID: 6454971
Filing Date: 2002-09-24
Classification: B09B,C04B,Y02W

Abstract:
A process for producing tiles from waste material, comprising the steps of:1) grinding the waste material to a reduced size; 2) removing ferrous metals from the waste material; 3) mixing the waste material with a binder to form a mixture after grinding; and 4) molding the mixture, wherein said binder comprises: magnesium oxide; a regulating agent for accelerating hardening of the magnesium oxide; a modifying agent selected from the group consisting of a water-reducing agent, a water-repellent agent, a water-resistant enhancing agent, and an active ingredient which can react with excess magnesium ions in said binder to form an insoluble magnesium salt; and a degrading agent for degrading heavy metal toxic substances contained in the waste material, said degrading agent including at least one compound selected from the group consisting of vitamin, tetrahydrofolid acid, and a chelating agent.