Enrichment of carbonate manganese ore
According to estimation given by geologists of Ulu-Telyak manganese ore deposit (Republic of Bashkortostan) there are more than 11 mln. t of oxidized and carbonate manganese ores, in which the content of manganese is equal to 7–25 % mas. The results of the research in enriching impoverished carbonate manganese ores in Ulu-Telyak deposit are given there, composition, % mas.: CaCO3 – 70–80; MnO2 – 7–25; Mn2O3 – 0.3–1.5; Fe2O3 – 2–5; Al2O3 – 1–2; SiO2 – 4–7; MgCO3 – 1–3. We propose an acidless way of enriching impoverished manganese ores, based on preliminary ore annealing with the following pitch lixiviation witch water solution of ammonium chloride and getting manganese concentrated product with content not less than 45%.