A negative pressure chlorination gold separation process

Abstract

The invention discloses a negative pressure chlorination gold separation process, comprising the following steps: S110, preparation of a liquid reaction material, adding pure water and concentrated hydrochloric acid into a reaction kettle, and mixing uniformly to obtain a liquid reaction material; S120, gold-containing material Pretreatment, mixing the gold-containing material and sodium chlorate evenly according to the weight ratio of 1:0.5-1, to obtain the gold-containing pretreatment material; S130, preheating the reaction kettle, passing hot water into the jacket of the reaction kettle; S140 , Feed reaction; S150, negative pressure to catch chlorine; S160, cooling and filtering. The beneficial effect is that compared with the traditional method of chlorination and gold separation, it reduces the phenomenon of pipe burst or explosion caused by the increase of pressure in the closed reaction vessel caused by the chlorine gas generated when the sodium chlorate is put in, and improves the safety of the chlorination and gold separation process. ;Materials can be fed at the same time, which saves the feeding time, improves the reaction efficiency of gold chloride separation, and shortens the operation time; after a single feeding, one person can perform the reaction operation, which reduces the number of operators and labor costs compared with the traditional process .

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a negative pressure chlorination gold separation process. Background technique [0002] The gold hydrometallurgy process is mainly the cyanidation method. The replacement gold sludge obtained from the gold extraction process of the cyanidation method is the intermediate raw material for gold extraction. Generally, the wet refining process is used to recover gold and silver. The wet refining gold generally needs to be pre-leached by replacement gold sludge. Zinc and pre-preg slag primary chlorination leaching, crude gold reduction, secondary chlorination leaching, primary gold reduction refining and other processes to obtain finished gold powder. The replacement of gold mud needs to go through a pre-leaching process to remove excess zinc powder and some impurities. The obtained pre-leaching slag is then chlorinated and leached to dissolve Au and other impurity metals in the sla...

AI Technical Summary

Problems solved by technology

But there are following problems in using above-mentioned technology in the gold-dividing process: 1, sodium chlorate has the property of strong oxidation property under acidic condition, is soluble in water, can't accomplish once to drop into and finish the gold-dividing operation completely in the gold-dividing operation Process; 2. After the sodium chlorate is put in, the reaction is violent and a large amount of chlorine gas is produced, which causes the pressure to rise continuously in the confined space, which brings a lot of inconvenience to the staged dosing and increases the risk factor

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