The invention discloses a process for selective efficient
copper extraction and comprehensive
recovery from lead
copper matte and belongs to the field of wet processes of non-
ferrous metal metallurgy. According to the process disclosed by the invention, the lead
copper matte is taken as a
raw material, and the process comprises the following steps: crushing,
grinding and screening the lead copper matte, performing pulp conditioning on the lead copper matte after screening and
sulfuric acid (or a waste
electrolyte), then pouring into a high-pressure kettle, performing leaching, adding an adjusting agent A and introducing
pure oxygen; controlling technical conditions, oxidizing
sulfur in the lead copper matte to elemental
sulfur in the oxidization and leaching processes, and transferring into
slag; oxidizing copper to enable the copper to enter a solution in the form of copper ions and enabling lead to leave in the
slag in the form of
lead sulfate with gold and silver; and enabling most of iron to enter into the
slag in the forms of
hematite and yellow
calcium iron
vitriol under high-temperature, high-pressure and high-acid conditions. After the completion of the leaching process, liquid-
solid separation is performed to realize primary separation of the copper and other valuable elements; after acid adjustment of a
leachate,
cyclone electrolysis is directly performed to extract the copper in the
leachate, and then a
cathode copper product which is in line with a
national standard can be obtained; and leaching residues are sent into a lead
pyrometallurgy system for comprehensively recovering Pb, Ag, Au and other valuable elements.