| abstract |
The invention provides a method for recovering valuable metals in copper anode slime, which belongs to the technical field of comprehensive treatment of copper anode slime. The recovery method of the invention efficiently recovers selenium, copper, tellurium, arsenic, lead, bismuth and precious metal gold and silver in the copper anode slime, and adopts a two-step vacuum carbothermal reduction method to replace the anode slime reduction smelting and precious lead in the traditional fire method Step-by-step blowing avoids the discharge of arsenic-containing smoke and dust in the traditional process; the gold-rich residue recovered by the present invention almost does not contain base metals such as lead, bismuth, antimony, arsenic, etc., and gold powder can be obtained after chlorination and reduction. The base metal content is lower, which greatly reduces the output slag volume and production cycle, and reduces the loss of precious metals in the slag. The whole recovery method of the invention shortens the recovery period of precious metals, improves the direct yield of valuable metals, and the vacuum carbothermal reduction process is a closed system, the whole process avoids the emission of smoke and dust, improves the working environment and solves the problem of arsenic. Recycling emission problems, and the process is simple and environmentally friendly. |