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Is Zijin Mining a State-owned Enterprise or a Central Enterprise?
Zijin Mining is a joint-stock company, a high-tech and efficient international mining group focusing on the exploration and development of gold and basic metal mineral resources, and a top 500 enterprise in China. It successfully landed in the Hong Kong stock market in June 5438+February 2003, and returned to the A-share market in April 2008, becoming the first enterprise in the A-share market to issue shares with a face value of 0. 1 yuan.
Invention patents of Zijin Mining:
1. Method for extracting metallic copper from mixed copper ore;
After copper sulfide and copper oxide ore are crushed, high-purity cathode copper is obtained. All-wet combined process does not need grinding classification, roasting and acid production from flue gas. Tailings and tailings are coarse in particle size and easy to store. It has the advantages of high recovery rate, low cost, low investment and no pollution, which can bring new development to metallurgical industry in this mixed copper resource area.
2. Method for continuously preparing pure gold sol:
The invention relates to a method for continuously preparing pure gold sol by laser bombardment of a solid-liquid interface. The method of the invention can continuously prepare pure gold sol, which does not contain excessive reducing agent, reaction by-products, protective agent, dispersant and other harmful impurities, and does not need purification.
As an additive, it can be directly used in microelectronic devices, VLSI chips, medicine, immunolabeling, food, beverage, drinking water, wine, cosmetics and other industries.
3. Closed electrolyzer:
The device can isolate the acidic harmful gas produced by the electrolytic cell in the hydrometallurgical production process and lead it out through the exhaust pipeline, thus improving the working environment of operators and reducing the harm of occupational diseases. The closed electrolyzer has simple structure and convenient operation, and is suitable for application in hydrometallurgical electrodeposition process.
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