Kovdor Deposit Research Articles

Decomposition Mechanism of Hydroxyfluorapatite in Phosphoric Acid-Thermal Treatment

Abstract Hdydroxyfluorapatite (HFA), an apatite mineral in phosphate rock from the Kovdor deposit (U.S.S.R.), is used in rotary kiln manufacturing of an animal feed supplement.

Pore structure of vermiculite that has been activated by two-stage acid etching

Acid treatment of vermiculite from the Kovdor deposit in two stages offers a means for performing a controlled etching and obtaining a sorbent with a predominant content of uniform mesopores.

Parts of natural grain-size baddeleyite for quartz glass production equipment

A method of producing refractories from Kovdor deposit natural baddeleyite concentrate, with the use of natural grain-size powders (less than 0.5 mm) obtained after concentration of the residues of iron ore concentrate, has been developed.