Method for leaching lead by wet method through copper anode slime silver-extracted sediment

Abstract

The invention belongs to the technical field of wet metallurgy, and specifically relates to a method leaching lead by the wet method through copper anode slime silver-extracted sediment. The method is that 100 to 350g / L by concentration of sodium hydroxide solution is added to the silver-extracted sediment to perform size mixing; the weight concentration of the size is controlled to be 10 to 40%; after size mixing, the size is fed into a microwave reaction furnace to perform leaching reaction for 5 to 25 minutes under the normal pressure; then the size is discharged and subjected to solid-liquid separation so as to obtain the lead-containing leaching liquid. With the adoption of the method, lead in the silver-extracted sediment can be efficiently and quickly leached, overcomes the shortages of small leaching rate, long process and heavy environmental pollution in the traditional process can be overcome, and has the advantages of being simple in process, small in cost, quick to leach, environmentally friendly, small in treatment time, and high in comprehensive recovering benefit; the leaching rate of lead is 93 to 98%.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for wet-leaching lead from copper anode slime by separating silver slag. Background technique [0002] Silver separation slag is the product obtained from copper anode slime after gold separation and silver separation. The slag formation rate is generally 50%~60% of copper anode slime, because it contains lead, tellurium, tin, bismuth, antimony and rare precious metals, etc. Valuable metals become a valuable secondary resource. Due to the complex composition of silver-separating slag, it is difficult to recycle and process, which brings difficulties to comprehensive recycling, and the processing methods of silver-separating slag with different components are also different. The treatment process of silver slag is mainly divided into fire method and wet method. Fire extraction technology is seldom used, the main reasons are large investment, lengthy ...

AI Technical Summary

Problems solved by technology

Sodium carbonate conversion method, nitric acid dissolution deleading method and hydrochloric acid-sodium chloride leaching deleading method are often used for silver separation slag with high lead content, but there are corresponding problems, such as sodium carbonate conversion method requires high equipment , Difficult to control; Nitric acid dissolution and deleading method is easy to produce nitrogen-containing gas, and the working environment is poor