Some of the examples where this process may be applied include silicate ores, oxidic converter furnace slags and refractory oxides.
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 this reason, few silicate minerals are ore minerals.
Chrome brick is made from chromium ores, which are complex solid solutions of the spinel type (a series of oxide minerals including chromite and magnetite) plus silicate gangue, or impurity phases.
A first artificial neural network allowed retrieving the relative amounts of silicate, calcareous and ores matrices into soils.
Ore deposits mined solely for vanadium are rare because much of the vanadium in igneous rocks occurs in the relatively insoluble trivalent state, substituting for ferric iron in ferromagnesium silicates, magnetite (an iron ore), ilmenite (a titanium ore), and chromite.
X-ray diffraction showed that the smelter dusts were composed primarily of sulfides, oxides, sulfates, and silicates of metal ores, with galena being the primary dust component.
Willemite, white or greenish yellow silicate mineral, zinc silicate, Zn2SiO4, that is found as crystals, grains, or fibres with other zinc ores in many deposits.
Because the great bulk of Earth's crust (about 95percentt) is composed of silicate minerals, sulfide, oxide, and hydroxide ore minerals are at best only minor constituents of Earth's crust and in many cases they are very rare constituents.
