Мaterial composition and thermal properties of chrysotile asbestos enrichment tailings of the Kiembaevsky deposit

Technogenic formations of JSC Kiembaevsky GOK «Orenburg Minerals» obtained during the extraction and enrichment of chrysotile asbestos can serve as a potential raw material for the production of propants. It was found that the loss of mass of the material during firing is on average 13‒14 % and is associated with the dehydration of basic minerals. The transition of serpentine group minerals to forsterite begins at 818,4 °C and ends at 846,4 °C. At temperatures above 850 °C, all serpentine will turn into forsterite and enstatite. The content of forsterite in the fired material varies from 80 to 90 wt. %. Ill. 4. Ref. 25. Tab. 1.