Equipment for extracting gold and silver from lead/bismuth base alloy

Abstract

The invention relates to equipment for extracting gold and silver from lead / bismuth base alloy, and belongs to the technical field of nonferrous metallurgy. The equipment comprises a vacuum furnace body, a vaporization system, a volatile substance discharging system, a crude silver alloy discharging system, a feed pipe and an exhaust pipe, wherein the vaporization system is arranged in the vacuum furnace body; the bottom of the vaporization system is communicated with the volatile substance discharging system and the crude silver alloy discharging system; the feed pipe penetrates through the vacuum furnace body to reach the top of the vaporization system; and the exhaust pipe is communicated with the vacuum furnace body. By the equipment, 70 percent of lead, antimony, arsenic and bismuth can be transformed into alloy to be removed and recovered in the vacuum distillation stage, blowing fuel is greatly saved, the labor intensity is reduced, the production environment is improved and pollution emission is greatly reduced; and the equipment has high treatment capacity, low energy consumption and high metal recovery rate, does not generate smoke or oxidizing slag, is stable and reliable, and is environment-friendly energy-saving emission-reducing equipment.

Description

technical field [0001] The invention relates to a device for continuously extracting gold, silver alloys and lead-antimony-bismuth alloys from lead / bismuth-based alloys by vacuum distillation technology, belonging to the technical field of nonferrous metallurgy. Background technique [0002] In the non-ferrous metal smelting process, a large amount of intermediate products such as slag, anode slime, and dust will be produced, which contain a considerable amount of valuable metals such as lead, antimony, arsenic, bismuth, copper, silver, and gold. After reduction smelting, a Lead-based or bismuth-based alloys rich in gold and silver (commonly known as noble lead and noble bismuth), which also contain some antimony, arsenic, copper and other elements. In order to recover gold and silver, the traditional process is to send this alloy to the converter for ash blowing refining, to remove the oxide dust and slag of lead, antimony, arsenic, bismuth, copper and other metals, and to ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high energy consumption, high discharge, long treatment cycle, large amount of smoke and slag in the prior art and the reality of low output and high energy consumption of staged vacuum distillation, and to provide a continuous production, The processing capacity is 3-10 tons / day, and the products are metallic lead, antimony, bismuth alloys and crude silver alloys. It has low energy consumption, environmental friendliness, and simple operation of vacuum distillation equipment and technology, which reduces carbon emissions and saves production costs.

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