Method for extracting arsenic from pyrite cinder
A technology of sulfuric acid residue and extraction efficiency, which is applied in the field of arsenic extraction to solve environmental problems, increase added value and realize comprehensive utilization.
Inactive Publication Date: 2010-01-06
SHAOTONG TIANYUAN IND
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The invention provides to a method for extracting arsenic from pyrite cinder and relates to a processing technique of pyrite cinder, in particular to a method for extracting arsenic from pyrite cinder. In the method, fine iron powder is firstly separated from pyrite cinder through screening and magnetic separation; and the fine iron powder is soaked in hydrochloric acid and then filtered to separate the fine iron powder from solution containing arsenic acid. The method is characterized in that sulfur dioxide is added into the solution containing arsenic acid to produce arsenic trioxide, and the arsenic trioxide is extracted out through liquid-solid separation. The technique of the invention realizes extraction of arsenic from pyrite cinder and comprehensively utilizes other useful components, thereby solving the problem of environmental pollution caused by pyrite cinder pile containing arsenic, realizing comprehensive utilization of pyrite cinder and improving the added value of waste residue utilization.
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