REGENERATION OF MOLDING SANDS CONTAINING BINDING PHENOL RESIN HARDENED BY ESTER

摘要

FIELD: technological processes; metallurgy.;SUBSTANCE: spent casting molds or rods are destroyed. Refractory particles produced as a result of destruction are mixed with 0.1-3 wt % of pozzolanic admixture particles, and thermal treatment of mixture is carried out at the temperature from 450 to 900C. Puzzolanic admixture used is volcanic ash, pulverised fuel ashes, fly ash, crushed granulated blast-furnace slag, condensed fine siliceous dust, amorphous silicon dioxide and calcined bauxite.;EFFECT: improvement of regeneration moulding sand properties.;15 cl, 1 tbl, 1 ex, 1 dwg