FIELD: foundry engineering. SUBSTANCE: chemical treatment is effected with addition of 0,5-1,0 mass/per cent of carbone acids. Abrasive granules are treated at the temperature of 125-130 C during 145-155 minutes. Micropowder fractions are treated at the temperature of 130-135 C during 265-275 minutes. This method permits preserve initial properties of fire-proof oxides and use them repeatedly. EFFECT: improved technological process.
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|---|---|---|---|
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| METHOD REGENERATION OF POWDERS OF REFRACTORY OXIDES | 1985 |
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| METHOD OF REMOVAL OF CORUNDUM AND QUARTZ- CONTAINING CERAMIC CORES FROM INTERNAL HOLLOWS OF CASTINGS | 1998 |
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SU975173A1 |
