The principal coke modification possibility with butyl potassium xanthate was revealed. It was shown that the modified coke exhibits sorption properties with respect to nickel ions compared to untreated coke, traditionally used for melting. The influence degree of various factors on the sorption capacity of the modified coke was established.
In the paper the problem of utilization of stale hydroxide sludges containing nonferrous metals and arsenic is considered. It is proposed to carry out two-stage leaching of sludges by solutions of complexing agents with recovery of 97-99% of non-ferrous metals to solution and removal of arsenic in the form of sparingly soluble compounds suitable for burial.
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