ANTIBURNING MATERIAL FOR MOLDING SANDS Russian patent published in 1995 - IPC

FIELD: foundry practice. SUBSTANCE: antiburning material is constituted by the product of heat treatment of solid municipal waste or the product of burning of heavy fractions of natural gas, containing, wt.-%: carbon, 97.0-99.0; volatile substances, 0.4-2.0; water, 0.02-0.6; ash, the balance. The antiburning material of this composition is produced in installations for heat treatment of solid municipal waste or on pyrolysis installations in the form of dense or powder-like coke particles with a density of 1200-1900 kg/cu m. The material is introduced into molding sands in the form of particles not larger than 1.0 mm. The material is chemically inert with relation to all binders and is well compatible, without entering any chemical reactions. EFFECT: improved composition of antiburning material. 4 tbl