Expanded mineral particles and apparatus and method of productio

Details Expanded mineral particles and apparatus and method of productio Expanded mineral particles and apparatus and method of productio

1988-08-01

1991-03-26

Straub, Gary P.

Compositions

Exfoliated or intumesced

106409, 106DIG2, 252378P, 501 33, C04B 1400, C04B 1608, C03C 1200

Patent

active

050026968

ABSTRACT:
A non-porous, substantially hollow, expanded mineral product, such as expanded perlite, is produced by uniformly and indirectly heating ore for about 1 to 30 seconds in an expansion chamber maintained at about 1400.degree. F.-2100.degree. F. to produce uncoated particles which exhibit superior short term and long term density stability characterics in liquid systems, and which may subsequently be coated to provide enhanced density stability characteristics.

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patent: 4767726 (1988-08-01), Marshall
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