Process for extracting mineral fibres from rocks

Details Process for extracting mineral fibres from rocks Process for extracting mineral fibres from rocks

C - Chemistry, Metallurgy

03

B

241/130

C03B 37/10 (2006.01)

Patent

CA 1090754

PROCESS FOR EXTRACTING MINERAL FIBRES FROM ROCKS . - ABSTRACT OF THE DISCLOSURE . - This invention relates to a process for extracting mineral fibres, generally known as "asbestos" from rocks and the like and for obtain- ing rock free from fibre. The process according to the invention comprises a raw material trituration operation and fibre opening and purification opera- tions. Before undergoing the latter operations and before any removal of the strongly magnetic grains present in the raw material, the triturated rock has added to it a small quantity of ferromagnetic powder with which it is intimately mixed, and the mixture obtained is subjected to magnetic grading to separate a magnetic concentrate consisting of grains rich in fibre from a waste product practically free from fibre.

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