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Novel environmentally-friendly precious metal mineral separation agent

A beneficiation agent and environment-friendly technology, applied in the field of new environment-friendly precious metal beneficiation agents, can solve the problems of low toxicity and environmental protection, cyanide pollution, etc., and achieve the effects of good stability, low consumption and fast recovery.

Active Publication Date: 2014-12-31
大冶市金欣环保科技有限公司
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of mineral processing agent which can overcome the existing cyanide pollution problem and aim at oxidized gold ore and silver oxide ore. The mineral processing agent has the characteristics of high recovery rate, low toxicity and environmental protection, and good production stability.

Method used

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Embodiment Construction

[0014] The embodiments of the present invention are described in detail below, but the protection scope of the present invention is not limited to the following embodiments.

[0015] The present invention provides a new type of environmentally friendly precious metal beneficiation agent, the raw material composition and percentage composition are as follows: sodium carbonate 2.5%, sodium chloride 2.5%, calcium chloride 2.5%, lead nitrate 2.5%, bismuth nitrate 10%, Ammonium nitrate 10%, potassium permanganate 10%, sodium hypochlorite 20%, potassium iodide 20%, lime sulfur mixture 20%, weigh according to the ratio, and mix evenly.

[0016] The construction process is as follows: 1. Adjust alkalinity: After the raw ore enters the pool or piles up, first return the water to adjust the alkalinity to make the pH reach the optimal value of 10.5, and control the pH value at 10-12. When the pH is less than 10, add lime water or Caustic soda (use as little as possible) to the medicine pool; ...

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Abstract

The invention discloses a novel environmentally-friendly precious metal mineral separation agent. The novel environmentally-friendly precious metal mineral separation agent comprises, by mass, 2.5% of sodium carbonate, 2.5% of sodium chloride, 2.5% of calcium chloride, 2.5% of lead nitrate, 10% of bismuth nitrate, 10% of ammonium nitrate, 10% of potassium permanganate, 20% of sodium hypochlorite, 20% of potassium iodide and 20% of lime sulphur. The lead nitrate is used as a stabilizing agent. A preparation method of the novel environmentally-friendly precious metal mineral separation agent comprises simple processes of weighing the raw materials according to the above ratio and mixing the raw materials to obtain a uniform mixture, wherein the mixture is powder, has good solubility and can be completely dissolved in 10min by an appropriate amount of water. The method can realize effective leaching of gold ions, improves a recovery rate and is suitable for large-scale production. The method utilizes lead nitrate as an effective stabilizing agent thereby reducing interference produced by harmful substances such as sulfur and antimony. Compared with the conventional carbonitriding dump leaching, the method shortens a production period by 20%.

Description

Technical field [0001] The invention relates to a beneficiation agent, in particular to a novel environmentally friendly noble metal beneficiation agent for oxidized gold and silver ore. Background technique [0002] At present, the beneficiation of precious metals, especially the beneficiation of gold and silver, mainly adopts the cyanidation method. At present, more than 85% of the world's gold is extracted by the cyanide method. The production of gold by cyanidation is a relatively mature process. Its advantages are simple process, low production cost, strong adaptability to ore, high leaching rate, etc.; disadvantages are long leaching time, serious harm to human safety, agriculture, animal husbandry, fishery, and environmental pollution. With the increasingly stringent requirements of environmental protection, especially after the "China Environmental Protection Law" was promulgated in 1989, companies were forced to accelerate the research of clean production processes whil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/12
CPCY02P10/20
Inventor 左良才
Owner 大冶市金欣环保科技有限公司
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