Foundry sands derived from serpentine and foundry molds derived

Details Foundry sands derived from serpentine and foundry molds derived Foundry sands derived from serpentine and foundry molds derived

1984-04-26

1986-08-05

Lieberman, Paul

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 383, B23B 728

Patent

active

046041400

ABSTRACT:
There is disclosed a granular product suitable for use as foundry sands and obtained from asbestos tailings calcined at a temperature of from 1250.degree. to 1450.degree. C., said asbestos tailings having an MgO:SiO.sub.2 ratio greater than 1.0, the granules constituting the granular product being characterized by having a thermal expansion at 1000.degree. C. of not more than 1.0% and a particle size of between -20 to +200 mesh (Tyler), the granules being further characterized by being made up mainly of particles of enstatite bonded by gruenerite and fayalite, and substantially unreactive to basic oxides present in the cast metal.

REFERENCES:
patent: 2786771 (1957-03-01), Waterhouse et al.
patent: 3722574 (1973-03-01), Anderson et al.
patent: 4102689 (1978-07-01), Borom

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