Yes, it is possible.
aluminium oxide
No - that is low yield - there are ores richer than that around the world
Igneous processes and hydrothermal solutions
The most important mineral of chromium is chromite.
The primary elements would be oxygen and sulfur, forming iron oxide, magnesium oxide, calcium sulfide, etc. Metals also bind with molecules such as silicates (SiO3), sulfates (SO4), or other metal-oxygen compounds, like chromate (Cr2O7).
The use of aqueous solutions for the recovery of metals. Example: Leaching of copper oxide ores using a sulphuric acid solutions (or solution containing sulphuric acid). The Copper can then be recovered from solution using solvent extraction and electrowinning.
Those ores which contain metal in the form of oxides are called as oxide ores.
Sulfide ores and oxide ores
Acid precipitation is formed downwind of emitters of sulfur oxide and nitrogen oxide producing industrial areas. This would include coal fired power plants, metal smelters using sulfidic ores and refineries processing sour crudes.
aluminium oxide
Extracting a metal oxide from the ground
One name would be "Oxides", as in iron oxide (Rust), aluminum oxide, zinc oxide, and titanium oxide, to name a few.
Silver is most commonly found as its oxide in their ores.
Hydrometallurgy is used for the processing of copper.Example: Leaching of copper oxide ores using a solution containing sulphuric acid. The Copper can then be recovered from solution using solvent extraction and electrowinning.
1. Concentration of the ores. 2. Converting the concentrated ore to its oxide. 3. Extracting the metal from its oxide. 4. Purification of the metal.
No - that is low yield - there are ores richer than that around the world
Cobalt is obtained by heating its ores to produce cobalt oxide. The cobalt ores are: cobaltite, smaltite, chloranthite, and linnaeite. Once those ores are heated, the remaining compound is then heated with aluminum to release the pure metal.