Process for the production of products from naturally-occurring

Details Process for the production of products from naturally-occurring Process for the production of products from naturally-occurring

1978-11-16

1980-07-29

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 59, C04B 3504

Patent

active

042149100

ABSTRACT:
The invention is an improvement in conventional processes for the production of fire-resistant products from naturally-occurring magnesium orthosilicate-rich rock with fine-grained addition of a magnesium oxide-containing substance, and optionally of a chromium oxide-containing substance, wherein the resulting granular mixture is introduced into a formed body and then calcined at sintering temperatures to provide the product, the improvement comprising adding the magnesium orthosilicate-rich starting material in an amount such that the product obtained has a mole ratio of magnesium oxide to silicon dioxide of 1.64:1 to 1.85:1, and sintering the product sufficiently to achieve a gross density of more than 2.80 g./cc.

REFERENCES:
patent: 1926094 (1933-09-01), Goldschmidt et al.
patent: 2077795 (1937-04-01), Harvey et al.

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