FIELD: foundry. SUBSTANCE: mixture comprises 0.75 - 2.0 wt. per cent of metal oxide material (produced by crushing together magnesium oxide material and iron oxide material up to 200 - 400 m2/kg specific surface); 2.00 - 3.50 wt. per cent of acid phosphate composition; the balance being fire resistant granular filling of silicate nature. Complex metal oxide material comprises 4.0 - 30.0 wt. per cent of FeO; 5.0 - 40.0 wt. per cent of Fe3O4; 1.0 - 20.0 wt. per cent of Fe2O3; 10.0 - 90.0 wt. per cent of MgO. EFFECT: increased quality of moulds and rods due to their increased elastic-plastic properties. 2 cl, 4 tbl
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0 |
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SU942859A1 |
Authors
Dates
1994-11-15—Published
1991-06-24—Filed