Small quantities of metal ores are obtained from the ranges; near Srednogorie, on the Topolnitsa River, is a large electrolytic copper works.
Iron ore is obtained from Kryvyy Rih to the west and from Kerch in Crimea; manganese is mined at Nikopol and Marhanets on the Dnieper.
New data on the accumulation of macroelements K, Ca, Mn, Fe, biophilic microelements Cu, Zn, chalcophilous Mo, Pb, Ag, As, Sb, Ga, Cd, Tl, rare lithophilous Rb, Sr, Zr, Y, Nb, in the tissues of larch (Larix cajanderi Mayr). of the natural taiga landscape and the tailing dump in the Kuranakh Gold ore field were obtained.
PBM ore breakage parameters were obtained from the feed samples using simplified tests carried out in a laboratory scale conventional tubular ball mill and the results are discussed here.
Paints were obtained from minerals such as iron ores (red and yellow ochres), copper ores (blue and green), soot or charcoal (black), and limestone (white).
Rice, jowar (grain sorghum), corn (maize), and pulses are grown in the surrounding area, and coal, garnets, iron ore, and talc are obtained in the locality.
Vanadium is obtained from ores as vanadium pentoxide (V2O5) through a variety of smelting, leaching, and roasting processes.
By far the largest source is phosphate rock, although some use is made of phosphatic iron ore, from which the phosphorus is obtained as a by-product from the slag.
From their silicate ores, all the alkali metals may be obtained the same way: sulfuric acid is first used to dissolve the desired alkali metal ion and aluminium III) ions from the ore (leaching), whereupon basic precipitation removes aluminium ions from the mixture by precipitating it as the hydroxide.
For example, tin can be obtained from its ore cassiterite by reduction with carbon in the form of charcoal.
