Treatment method of high-silver-content low-grade alloyed gold

Abstract

The invention discloses a treatment method of high-silver-content low-grade alloyed gold, which comprises the following steps: performing material preparation on the high-silver-content low-grade alloyed gold with the silver content of more than 8% and the gold content of less than 60%, performing high-vacuum distillation under the vacuum degree of (5-10) * 10 <-3 > Pa and the temperature of 1300-1600 DEG C to realize gold-silver separation, volatilizing and enriching silver in a gaseous state on a top layer, and enabling an intermediate material containing part of silver and gold to enter an intermediate layer, so as to obtain the high-silver-content low-grade alloyed gold with the silver content of more than 8% and the gold content of less than 60%; and when the temperature in the vacuum distillation main body is reduced to 300 DEG C, nitrogen is introduced to prevent the material from being oxidized, the vacuum pressure in the furnace is reduced to zero, cooling and material receiving are performed, a top material is collected by a top material receiving disc and then enters a silver purification process, and a middle material is collected by a middle material receiving disc and then returns to secondary distillation. And the bottom material enters a subsequent gold purification procedure after being subjected to bead quenching. According to the method, gold and silver can be efficiently separated to enrich and increase the gold content of the alloyed gold, a high-content gold raw material is provided for a subsequent gold smelting and purifying process, the comprehensive utilization rate of the low-grade alloyed gold is increased, and the treatment process is clean and energy-saving.

Description

technical field [0001] The invention relates to the technical field of precious metal smelting, in particular to a clean production method for efficiently separating gold and silver from high-silver content and low-grade alloy gold. Background technique [0002] Alloy gold is mostly produced in gold mining enterprises, and is often associated with other metals. In addition to gold, alloy gold is also associated with other metals such as silver, copper, and iron. Alloy gold is produced in different mines and contains different metal components. The gold in the alloy has different levels of fineness. The alloy gold usually contains between 10% and 90% of gold. In the production of gold smelting, different gold purification technologies can be used according to the different gold content in the alloyed gold, and valuable metals such as gold and silver can be effectively recovered. For alloy gold with silver content less than 8% and gold content greater than 60%, the convention...

AI Technical Summary

Problems solved by technology

For alloy gold containing less than 8% silver and more than 60% gold, the conventional aqua regia gold method can be used for gold purification. In the aqua regia gold process, gold is dissolved in aqua regia, while silver is precipitated as silver chloride However, for high-silver content low-grade alloy gold containing more than 8% silver and less than 60% gold, it is difficult to separate gold and silver by the conventional method of dissolving gold in aqua regia because of the phenomenon of mutual wrapping of gold and silver.

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