METHOD FOR PRODUCING HIGH-STRENGTH SPHERICAL CERAMIC PELLETS Russian patent published in 1999 - IPC

Abstract RU 2133716 C1

FIELD: production of ceramic materials, which may be used as heat-insulating filler working under high temperature and increased pressure conditions. SUBSTANCE: method involves calcination, grinding, dosing and charging natural aluminosilicate basic material into plate-type pelletizer; wetting ground basic material; pelletizing by plate-type pelletizer; dosing and feeding additional amount of ground basic material into pelletizer; sieving produced pellets for separating base fraction; calcination base fraction in rotary furnace to obtain maximum density; sieving calcined pellets; grinding 60-90% of calcined aluminosilicate basic material to particle size with sieve residue of 0.063 mm (10-20%), with average particle size of 20-40 microns, and grinding 10-40% of basic material to particle size with sieve residue of 0.063 mm less than 10%, with average particle size being less than 20 microns, preferably less than 5 microns. Finely dispersed basic material is uniformly fed into pelletizer upon wetting of ground material and producing granules and prior to pelletizing process. Ground basic material is wetted with aqueous solution of organic binder or clay. EFFECT: reduced consumption of power for grinding basic material, increased porosity of pellets allowing drying process to be eliminated. 3 cl, 1 dwg, 1 ex

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RU 2 133 716 C1

Authors

Migal' V.P.

Mozhzherin V.A.

Novikov A.N.

Salagina G.N.

Sakulin V.Ja.

Skurikhin V.V.

Tsvetkov A.E.

Dates

1999-07-27Published

1997-11-10Filed