FIELD: foundry engineering. SUBSTANCE: mixture for semi-constant moulds has bag house dust as iron-containing agent and water. Bag house dust has 45-65 per cent of iron and its basicity index is 0,6-2,6. Mixture consisting of 80-97 per cent of bag house dust and 3-20 per cent of water enhances mould resistance and improves ingot surface quality after roasting. EFFECT: improved quality. 2 tbl
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