Gold pulverization device for gold refining

Abstract

The invention discloses a gold pulverization device for gold refining. The gold pulverization device comprises a graphite funnel, a gold injection barrel, a water tank and a filter plate, a high-pressure water line spraying opening is formed in the top of the gold injection barrel, the graphite funnel is arranged above the high-pressure water line spraying opening, and the side edge of the high-pressure water line spraying opening is connected with a pipeline pump through a pipeline pump water outlet pipe; and an overflowing opening is formed in the side wall of the gold injection barrel, and a water tank is arranged below the tail end of the overflowing opening.By adopting the equipment disclosed by the invention, the obtained gold powder can be dissolved in sodium chlorate, and the problem that nitrogen oxides in tail gas using an aqua regia medium exceed the standard is avoided.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a gold pulverizer for gold refining. Background technique [0002] At present, there are hundreds of enterprises engaged in gold purification and refining. The technological process adopted is alloy gold melting—water quenching to break beads, aqua regia (a mixture of nitric acid and hydrochloric acid) to melt gold, and sodium sulfite reduction process. The nitrogen oxides produced in the process are serious. To pollute the air, the absorption of lye alone cannot fully meet the national emission standards. The pulverization equipment of Henan Zhongyuan Gold Smelter Co., Ltd. is the technology and equipment imported from the Swedish Boliden Company. The price is high, and the complete set of equipment is more than 13 million. It is difficult for small and medium-sized gold smelters and jewelry processing plants to afford this kind of equipment. [0003] Alloy gold conta...

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Problems solved by technology

[0002] At present, there are hundreds of enterprises engaged in gold purification and refining. The technological process adopted is alloy gold melting—water quenching to break beads, aqua regia (a mixture of nitric acid and hydrochloric acid) to melt gold, and sodium sulfite reduction process. The nitrogen oxides produced in the process are serious. To pollute the air, the absorption of lye alone cannot fully meet the national emission standards. The pulverization equipment of Henan Zhongyuan Gold Smelter Co., Ltd. is the technology and equipment imported from the Swedish Boliden Company. The price is high, and the complete set of equipment is more than 13 million. It is difficult for small and medium-sized gold smelters and jewelry processing factories to afford this kind of equipment

[0003] Alloy gold contains various impurities. Before making jewelry, gold ingots and bars, it needs to be purified. During the purification process, aqua regia or sodium chlorate is used to dissolve alloy gold. Aqua regia is suitable for dissolving large gold particles. Sodium chlorate is suitable for dissolving small particles of gold, but the nitrogen oxide treatment process produced during the dissolution process of aqua regia is very complicated and difficult to meet the standard, while the chlorine gas produced during the dissolution process of sodium chlorate is easily neutralized with liquid caustic soda. The original intention of this project is to make alloy gold powder into small gold powder, so that sodium chlorate can be used to dissolve gold, which is fast and environmentally friendly

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