A kind of method for recovering silver from brittle sulphur, lead and antimony ore waste residue

Abstract

The invention discloses a method for recovering silver in a jamesonite waste residue. The method for recovering the silver in the jamesonite waste residue comprises the following steps of (1) pressurizing and oxidizing: heating, stirring, pressurizing and oxidizing under an oxygen atmosphere; (2) digesting and filtering: injecting a digestion solution, heating, stirring to completely digest the waste residue, adding a regulator for regulating a pH value after digesting completely, and filtering to obtain a filter liquor; (3) reacting and settling: adding compound protease and a silver ion intothe filter liquor, combining, pressurizing, filtering the solution obtained after reaction through a semipermeable membrane, and separating to obtain a protein silver mud; (4) hydrolyzing and acidifying: adding a hydrolysate into the protein silver mud, heating for hydrolyzing, acidifying through dilute nitric acid to form a silver-rich solution after hydrolyzing, and adjusting a pH value of thesilver-rich solution; and (5) electrolyzing and purifying: adopting an ion exchange membrane for carrying out diaphragm electrolysis in an electrolysis bath used by a diaphragm electrolysis process, and precipitating pure silver on a cathode electrode. The method for recovering the silver in the jamesonite waste residue provided by the invention is simple to operate, easy to implement, low in labor cost, and beneficial to reducing manual labor intensity, and improving working efficiency.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal recovery, and in particular relates to a method for recovering silver from brittle sulfur-lead-antimony ore waste residue. Background technique [0002] At present, as non-ferrous metal smelting resources are becoming less and less, the problem of alternative resources has not been solved, and the superimposed impact of extensive production and processing methods has led to increasing pressure on the survival of smelting enterprises. The production process of most smelting enterprises is mainly through the smelting and separation of ores to extract various non-ferrous metals. This traditional production method is due to the scarcity of raw materials and high prices, and the profits are getting less and less. Therefore, many enterprises have turned to secondary minerals. Comprehensive utilization of secondary resources, using the waste residue after refining the main metals to process and ...

AI Technical Summary

Problems solved by technology

However, the existing method for recovering silver from waste slag is complex in operation and has a long process, low recovery rate, incomplete extraction, low purity of recovered metals, and secondary purification is required, resulting in a large amount of waste of manpower and material resources, and the recovery of some precious metals When extracting elements, environmental pollution is not considered in the process. After using cyanide as the beneficiation agent, a large amount of cyanide-containing wastewater is produced, which has caused great harm to the staff and the environment.

Images