METHOD OF PREPARING MOLDED RAW MATERIALS MIXTURE Russian patent published in 1994 - IPC

FIELD: building materials production. SUBSTANCE: method involves mixing caustic magnesite and crushed wastes of blast furnace production, mixing with aqueous solution of bishophite (its density being 1.3 1,3 kg/cm³) till ratio aqueous and solid phase is 0.21-0.44 and molding. Base blast furnace slag and/or furnace top dust are used as mentioned above wastes. Proposed mixture contains, mass % : caustic magnesite 23-27.9, wastes of blast furnace production 37.6-45.3, bishophite (as calculated for MgCl₂) 8.95-13.16, water the rest. Said mixture may additionally contain uncrushed cement clinker, its quantity being 3-4% . Strength of desired mixture in 28 days 72-95 MPa. EFFECT: improves efficiency of the method. 1 tbl