PARTING SAND FOR MOLDS AND CORES Russian patent published in 2003 - IPC

FIELD: foundry. SUBSTANCE: parting sand contains the following amounts of components, wt.%: binder LST 4.0-6.0; binder KO 2.0-4.0; slime formed in processes of oil primary processing 1.0-3.0; the balance, quarts sand. Metal casting in mold is accompanied by oxidation of paraffin hydrocarbons contained in slime. In this case, carbon monoxide is liberated to form reducing atmosphere in mold and to prevent oxidation of metal poured into molds, in this way burning-on of casting surfaces is prevented. EFFECT: higher efficiency of use. 2 cl, 2 tbl, 5 ex