Method for extracting yellow gold from gold extracting residue and complex and unmanageable hard-to-deal electrum

Abstract

The invention relates to a method of the smelting technical field, in particular to a method for extracting yellow gold from gold extracting residue and complex and unmanageable hard-to-deal electrum. The method successively comprises the following steps of: (1) proportioning raw materials in the following parts by weight to prepare mixed materials; (2) putting the mixed materials prepared in thestep (1) into an oxygen enrichment side-blown bath for melting; (3) discontinuously releasing copper matte produced in the step (2) from the oxygen enrichment side-blown bath to be blown into yellow gold by the oxygen enrichment side-blown bath; and (4) carrying out flotationon melt residue and blowing residue, and returning the flotation concentrate used as concentrate residue to step (1). The invention aims to solve technical problems that gold extracting residue and electrum difficult to deal are difficult to deal, and are hard to be sufficiently used. The invention has advantages of: (1) a great quantity of copper concentrate or a small quantity of copper concentrate is mixed to enter the oxygen enrichment side-blown bath to be melted to form yellow gold, so the recovery rate of gold and silver is improved; (2) copper matte has favorable enriching performance, and valuable elements in the copper matte can be recovered.

Description

technical field [0001] The invention relates to a method in the technical field of smelting, in particular to a method for extracting gold-silver-copper alloy from gold-extracting waste residue and complicated and refractory gold-silver ore. Background technique [0002] Due to the complexity of the occurrence state of gold and silver in gold concentrate and the limitations of the gold smelting process itself, the gold extraction waste residue still contains a lot of valuable elements, which has great reuse value. For cyanidation gold extraction tailings, there are currently two commonly used processes. One is the process of extracting gold tailings - boiling roasting - calcination and cyaniding gold - flue gas acid production. The other is gold extraction waste slag-copper flotation-lead flotation-zinc flotation-sulfur slag process. The purpose of the roasting cyanidation process is mainly to recover the sulfur element in the gold extraction waste residue to produce sulfu...

AI Technical Summary

Problems solved by technology

Roasting cyanidation is the most widely used gold extraction process at home and abroad, but the recovery rate of gold is about 90%, and the recovery rate of silver is only 60-70%

Both pressurized pre-oxidation technology and biological pre-oxidation technology can only recover gold and silver, and the comprehensive recovery capacity is relatively poor.

Moreover, the roasting cyanidation process can only open the fine-grained gold wrapped in pyrite, and cannot solve the problem of gold extraction wrapped in gangue minerals such as quartz.