arsenic removed from ore
In most cases, arsenic is an unfavorable element in metallurgical process The mechanism of arsenic removal was investigated through roasting experiments performed on arsenopyrite-bearing iron ore
Removal of arsenic, antimony and bismuth from copper may take place in the smelting operations by scorification, volatilization, or, under special treatment, by processes of concentration Owing to the great variety of materials that are treated in economical metallurgy, it is rarely possible to obtain exact weights from any particular operation
The removal of arsenic from water has been practiced for many years (8-11) but with the recent emphasis on clean water standards there has been renewed activity in relation to the problem The methods which have been investigated include precipitation, co-precipitation, adsorption, ion exchange and liquid-liquid extraction but to date only precipitation and co-precipitation processes have been .
 Arsenic can also be leached out of some metal ores by cyanide or acid rock drainage but can be captured and removed from wastewater before it is released into the environment  Arsenic is also present in coal used to generate electricity When coal is burned, ash is produced which contains most of the naturally occurring arsenic
Arsenic ores are divided into several known types according to the commercial classification of ore deposits: arsenic (arsenopyrite and realgar-orpiment), gold-arsenic, complex-metal-arsenic, copper-arsenic, arsenic-cobalt, and arsenictin or
In most cases, arsenic is an unfavorable element in metallurgical process The mechanism of arsenic removal was investigated through roasting experiments performed on arsenopyrite-bearing iron ore Thermodynamic calculation of arsenic recovery was carried out by FactSage 70 software (Thermfact/CRCT, Montreal, Canada; GTT-Technologies, Ahern, Germany)
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