Número de publicación: WO2016200286 (A1)
Fecha de publicación: 15 de diciembre de 2016
The invention relates to a method for producing blocks of foamed glass-crystalline ceramics. The technical result of the invention is the production of foamed ceramic materials having a thickness of up to 200 mm and a uniformly cellular fine-pore structure throughout the volume of the material and enhanced physical and chemical characteristics. The method comprises preparing a finely ground glass-crystalline phase with a particle size in a range of 1-50 µm comprising an industrial by-product containing at least 10 wt% of silicon carbide. A finely ground charge is then prepared for making foamed blocks, said charge having a particle size in a range of 1-50 µm and comprising the finely ground glass-crystalline phase in an amount of 5-95 wt% and a binding component. The charge is pressed to produce blanks in the shape of large-size tiles which are then dried until a residual moisture content of 0.5% is achieved, a double layer of engobe is applied to the bottom and side surfaces of the tile, which are aligned with the movement of a roller conveyor. The dried tiles, carried by the roller conveyor, enter a kiln where the speed of the conveyor is 10-25% slower at the end of a sintering zone than upstream of said zone. Once foaming is complete, the bar is quenched, an incision is made thereon, and, upon exit, the bar is divided into blocks along the incision lines, the blocks then being annealed and machined.
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