COMPLEX ORE PROCESSING AT YAROSLAVSKII MINING AND CONCENTRATION INTEGRATED WORKS

摘要

Hydro-chemical scheme with complete material decomposition via leaching at 240-260 deg C by aluminate or alkali solutions with consequent separation of extracted in the solution beryllium, lithium, rubidium, cesium and fluorine in commercial products is developed and tested in semi-industrial conditions. This technological scheme is destined for complex processing of ores and dumps at Yaroslavskii mining and concentration integrated works with extraction all valuable ore components.It is expedient to use combined flotation/hydro-chemical scheme with fluorite extraction into fluorite concentrate having 92 percent CaF_2, for carbonate ores with module 1. Extraction degree constitutes 75 percent with additional extraction of 15 percent as cryolite in hydro-chemical branch. Calcium extraction into calcite product makes 70 percent, extraction of rare metals into aluminate solution achieves 75-80 percent with consequent isolation in the form of commercial products (such as carbonates of lithium, rubidium, cesium; beryllium hydroxide or photoberyllate of ammonium and cryolite).