Production line for refining and purifying crude gold, crude gold pulverization device and spraying pipe

Abstract

The invention relates to a production line for refining and purifying crude gold, a crude gold pulverization device and a spraying pipe. The crude gold pulverization device comprises a gold powder collecting barrel and a high-pressure water supply system, an inlet and an outlet are formed in the upper end and the lower end of the gold powder collecting barrel respectively, an opening and closing valve is arranged at the outlet, the spraying pipe is arranged at the inlet, an annular cavity is formed inside the pipe wall of the spraying pipe, the annular cavity is connected with the high-pressure water supply system through a water pipe arranged on the cavity wall of the annular cavity, a plurality of water spraying holes communicating with the annular cavity are formed in the lower end surface of the spraying pipe in the circumferential direction at intervals, and the axes of the plurality of water spraying holes intersect with the axis of the spraying pipe at one point. The high-pressure water supply system provides water pressure power for water entering the annular cavity of the spraying pipe, and the water is sprayed out from the water spraying holes, so that high-pressure spraying water lines are generated, all the high-pressure spraying water lines are converged to one point, and then the gold powder can be pulverized into gold powder with smaller particles; and the obtained gold powder can be rapidly dissolved in sodium chlorate, the structure is simple, and the cost is low.

Description

Technical field [0001] The invention relates to a production line for refining and purifying alloyed gold, a powdering device for alloyed gold and a spray pipe. Background technique [0002] Consolidated gold contains various impurities, which must be purified before being made into jewelry, gold ingots and gold bars. At present, the process flow used in the purification and refining of composite gold is: melting of composite gold-pulverization of gold water-aqua regia (a mixture of concentrated hydrochloric acid and concentrated nitric acid in a volume ratio of 3:1) dissolving gold-reducing with sodium sulfite, The nitrogen oxides produced during the reduction process seriously pollute the air, and it is difficult to fully meet the national emission standards only by lye absorption. Many companies use sodium chlorate instead of aqua regia to dissolve gold. The chlorine generated during the dissolution of sodium chlorate can be easily neutralized with liquid caustic so as to ach...

AI Technical Summary

Problems solved by technology

[0003] However, aqua regia can quickly dissolve larger alloyed gold particles, while sodium chlorate is suitable for dissolving smaller alloyed gold particles. In order to improve production efficiency by quickly dissolving sodium phosphate, enterprises need to introduce foreign pulverization equipment. For example, the pulverization equipment of Henan Zhongyuan Gold Smelter Co., Ltd. is the introduction of technology and equipment from the Swedish Boliden Company. The price is high, and the complete set of equipment is 1300 It is very difficult to equip such equipment in various small and medium-sized gold smelters and jewelry processing factories.

Images