Patent ID: 6800242
Filing Date: 2004-10-05
Classification: C04B

Abstract:
A process for the production of an alkali-resistant ceramic body comprising the steps of:a) grinding together a mixture comprising 0% to 40% by weight of light magnesia, 0% to 80% by weight of roasted magnesia, 10% to 54% by weight of ceramic clay, 0% to 9% by weight of limestone, 0% to 4% by weight of water glass, 0% to 1.5% by weight of carboxymethyl cellulose, 0% to 27% by weight of talc, and 0% to 3% by weight of calcium or barium carbonate to a particle size of less than 50 microns for 80% of the particles wherein the amount of light magnesia or roasted magnesia in the paste is between 22 to 80% by weight; b) mixing the ground mixture with water to produce a paste containing less than 23% by weight of water, c) shaping the paste to a desired shape; d) drying the shaped product at 110 degrees centigrade to make it suitable for firing in a kiln; and e) firing the dried shaped product in a kiln at 1,250 to 1,450 degrees centigrade.