Method for comprehensively recovering valuable metal from copper anode slime

The invention belongs to the technical field of non-ferrous metal metallurgy, and provides a method for comprehensively recovering valuable metal from copper anode slime. The method comprises the following steps that 1, the copper anode slime is added to a selenium-containing acid solution, hydrochloric acid is added, the liquid-solid ratio is controlled to be 2-5:1, primary leaching is carried out, primary leaching residues are added to the selenium-containing acid solution, and compressed air is introduced for secondary leaching; 2, primary leach liquor and secondary leach liquor obtained in the step 1 are evenly mixed, neutralizing is carried out two times, lime is added to two-time post-neutralization liquor for sedimentation, copper-containing sediment residues and post-sedimentation liquor are obtained in a filtering mode, dilute sulphuric acid is added to the post-sedimentation liquor to adjust pH to 5-7, nano zero-valent iron is added to control potential for a reaction, and filtering is carried out; and 3, primary neutralizing residues obtained in the step 2 are leached three times through a sodium hydroxide solution, sulfuric acid and a mixed solution of sodium hydroxide and sodium sulphide, and leach liquor of three times is subjected to air oxidation and concentration and crystallization to obtain sodium antimonite.