METHOD FOR ROASTING CERAMIC ARTICLES Russian patent published in 1997 - IPC

FIELD: inorganic chemistry, particularly, manufacturing articles of natural mineral raw materials. SUBSTANCE: roasting of ceramic articles is carried out in the presence of solid carbon reduction agent. The process takes place by placing articles together with reduction agent into reaction capacity having gas impermeable roof, heating and isothermal sustaining articles in hydrogen atmosphere, gaseous products which are obtained being drawn off from the bottom of said reaction capacity. Whiteness of porcelain articles by roasting is increased up to 80 %, strength of periclase refractory material is increased 1.5 times. According to invention high grade articles may be prepared of low grade raw materials. EFFECT: increased whiteness of porcelain articles, increased strength of periclase refractory material.