Outotec offers new partial roasting process to purify

Outotec has developed a two stage partial roasting process to remove impurities – such as arsenic antimony and carbon – from copper and gold concentrates as a pre treatment to actual extraction processes It has also established a new continuous pilot plant at the company s research center

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Copper extraction refers to the methods used to the advantage of the metallurgical treatment plant such as arsenic and zinc remain in solution

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Although some plants are able to grow in soil with high levels of arsenic most do not grow as well or produce as much fruit as they would in uncontaminated soil 7 With a few exceptions plants do not accumulate arsenic in high concentrations and will die in severely contaminated soil 7

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Arsenic in the organism Arsenic is distributed throughout the living world as a trace element The average arsenic content in soil is 4 × 10 −4 percent in plant ash 3 × 10 −5 percent Marine organisms have a higher arsenic content than terrestrial forms fish contain 0 6–4 7 mg of arsenic per kilogram of raw matter stored in the liver

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Calcination Wikipedia

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Dead roasting is recommended when the pyrites have no trace of arsenic and when high metal recovery is critical Iron sulfides are transformed into iron oxides with the

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Roasting Plant Outotec

We have a strong track record in designing and implementing high capacity plant installations with throughputs ranging from 100–5 000 metric tons per day Our roasting processes are highly effective at removing impurities such as chlorine fluorine arsenic and mercury from concentrates and they feature a high combustion velocity with low

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Partial Roasting of Copper Concentrate Arsenic Mercury

The Outotec partial roasting reference list for arsenic containing concentrates is long and gives an indication that this technology has been developed during years this technology is advancing THE CODELCO ROASTING PLANT AT MMH IN CHILE The roasting plant supplied by Outotec to Codelco at the MMH site close to Calama is presented in the

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