Nuisanceless oredressing additive as well as preparation method and application thereof

Abstract

The invention relates to a low-toxicity and environmentally friendly gold and silver oredressing additive as well as a preparation method and application thereof. The main raw materials of the additive comprise sodium hydroxide, sodium carbonate, urea and potassium ferrocyanide. The preparation method comprises the following steps of: heating the sodium hydroxide, the sodium carbonate, the urea and the potassium ferrocyanide to 600-1,000 DEG C, and after the materials reach a molten state, continuing to preserve heat for 1-2 hours; directly cooling to normal temperature; and demoulding to obtain a nubby gold and silver oredressing additive. The product of the invention can be widely applied to producing noble metal mines, such as soaking, core spraying, and the like of gold oxide mines, silver oxide mines, copper oxide mines, and also can be used for industrial production industries of electroplating, and the like for replacing highly toxic sodium cyanide chemicals. Compared with other non-toxic sodium cyanide drugs, the additive provided by the invention has the advantages of good effect, stable drug properties, environmental friendliness, lower cost, and the like.

Description

technical field [0001] The invention relates to a beneficiation additive, in particular a beneficiation additive with low toxicity and environmental protection, aimed at precious metals such as gold oxide, silver oxide ore, copper oxide ore, and a preparation method and application thereof. Background technique [0002] Precious metals such as gold, silver and copper are valuable resources. The trend of gold, silver and copper mining in the world is that rich ore and easy-to-handle ore are decreasing or exhausted, and complex ore, refractory ore and lean ore have become the main resources for gold and silver ore production. According to reports, there are very few rich ores in the world at present, and more than 2 / 3 of them are refractory ores. Therefore, in the past two centuries, the research on refractory ores, especially the research on pretreatment methods and processes of refractory ores, and the research on the comprehensive recovery technology of complex ores has be...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of highly toxic cyanide pollution, for decades, relevant scholars at home and abroad have launched a large number of experimental research work, trying to find cyanide-free and non-toxic mineral dressing agents. There are dozens of gold leaching agents that have been studied, such as : Thiourea method, water chlorine method, coal gold agglomeration method, thiosulfate method, lime sulfur mixture method, hypochlorite method etc., in these methods, the main problem that restricts cyanide-free gold leaching technology to be applied to industrial production The production cost is high and the process is more complicated

For example, the thiourea method is expensive, the production cost is high, and the stability of the production process is poor, which restricts its promotion and application.

Other methods have not yet achieved breakthroughs in industrial application

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