METHOD FOR THERMAL TREATMENT OF WALL CERAMIC PRODUCTS MANUFACTURED FROM SULFUR-CONTAINING ALUMINOSILICATE RAW MATERIALS Russian patent published in 1995 - IPC

FIELD: manufacture of building materials. SUBSTANCE: to combine sulfur compounds formed by decomposition of organic and sulfide sulfur of raw materials and got into flue gases, into sulfate compounds directly in manufactured products in course of their thermal treatment, manufactured products after preheating are subjected to heating at temperature of 300-550 C in additional isolated zone of desulfurization. Flue gases containing sulfur dioxide are fed from desulfurization zone through pipeline 9 to subsequent of sulfurization. Products are heated in sulfurization zone up to temperature of 600-800 C at which sulfur dioxide contained in flue gases reacts with calcium carbonate contained in products to form sulfate compounds. EFFECT: higher efficiency. 1 dwg, 1 tbl