| 摘要 |
<p>PURPOSE:To separate and recover the arsenic in an electrolyte from copper by treating the electrolytically precipitated copper drawn from the electrolyte in the stage of electrolytic refining of copper with oxygen and an acidic soln. with sulfuric acid, leaching copper and arsenic and further crystallizing copper as copper sulfate. CONSTITUTION:Arsenic is simultaneously electrodeposited and incorporated in the electrocally precipitated copper obtd. by concentrating the electrolyte consisting essentially of copper sulfate and accumulated therein with a substantial amt. of arsenic and other impurities, crystallizing and separating part of lead sulfate and electrolyzing the remaining liquid. The slime of such electrolytically precipitated copper is subjected to a leaching treatment using oxygen and an acidic soln. with sulfuric acid to leach copper and arsenic and to deposit and separate the crude crystal of the copper sulfate. The liquid after the sepn. is cooled to crystallize lead sulfate, and after the residue is separated by filtration, the liquid contg. arsenic at high concn. is subjected to an antimony removal treatment according to need, then SO2 is blown to the remaining liquid to reduce and deposit arsenic. The deposited arsenic is separated and recovered from the liquid.</p> |
