Mine waste calcines collected from Hg mines at Almadén, Spain, and Terlingua, Texas, contain Hg sulfide, elemental Hg, and soluble Hg compounds, which constitute primary ore or compounds formed during Hg retorting.
Electrolysis is used extensively in metallurgical processes, such as in extraction (electrowinning) or purification (electrorefining) of metals from ores or compounds and in deposition of metals from solution (electroplating).
Titanium processing, the extraction of titanium from its ores and the preparation of titanium alloys or compounds for use in various products.
Many important metal ores are compounds of sulfur, either sulfides or sulfates.
The crisis has been punctuated by plunges in global demand for Brazilian commodities like iron ore and compounded by what critics call squandered public finances and bloated government spending and bureaucratic waste.
We did not give first priority to sick children in ore-processing compounds because we did not want to oversample children with malaria and other infectious diseases that are endemic in the area.
Carnallite is dug as ore or separated from other salt compounds that are brought to the surface by solution mining.
Two-thirds of households reported processing gold ore inside family compounds, and soil-lead levels in 85% of family compounds exceeded the U.S. Environmental Protection Agency EPAA) soil-lead standard [400 parts per million (ppm)] for areas of bare soil where children play (U.S. EPA 2003).
Copper processing, the extraction of copper from its ores and the preparation of copper metal or chemical compounds for use in various products.
Among the main imports were automobiles, gasoline and jet fuel, steel, footwear, lumber, scrap metal, copper ore, and inorganic compounds.
