METHOD OF HYDROTHERMAL TREATMENT OF LIMESTONE-SILICA AUTOCLAVE-HARDENING BUILDING PRODUCTS Russian patent published in 1998 - IPC

FIELD: manufacture of building materials. SUBSTANCE: invention gives special attention on heat treatment of silicate bricks and building products from autoclave-hardening concrete. Method of invention includes increasing temperature and pressure, curing at constant temperature and pressure, and reducing temperature and pressure to its atmosphere value. Method is distinguished by creating moisture conditions directly in autoclave using, as heat source, natural gas combustion products and, as steam source, free water in amount calculated from a formula. EFFECT: reduced power consumption due to independence of hydrothermal treatment of steam sources. 2 cl, 1 tbl