The world mine aging trend is getting worse, about half of the world's copper ore mine age of over 50 years, the world's largest mines in seven, but four have been mined more than 70 years. Due to the long mining time, the grade of the mine is declining year by year, and the newly discovered grades of the mines are mostly poorly tasted, resulting in the average grade of global mines falling from 1.6% in 1990 to around 1%. 1. Copper mine aging In Chile, for example, as the largest copper mine in the world, the overall decline in copper grades in Chile is particularly prominent. The top ten copper mines in Chile are located in the large mines of Escondida, ElTeniente and Los Bronces in Chile. Reduced by 0.02% to 0.04% per year. The decline in the grade of copper ore has constrained the growth of global copper concentrate supply, put forward higher requirements for mineral processing , and increased the cost of mineral processing, which will lay a hidden danger for future supply. In this context, the lower limit of the copper price (ie, the bottom of the price) will show an oscillating upward trend. Most of China's state-owned copper mines were prospected in the 1950s, produced in the 1960s, and experienced 30-40 years of exploitation. At present, there is a trend of depletion of resources and a decline in the grade of copper ore. With the deepening of the mining depth, the pattern of copper ore grades is still declining year by year. The past mining technology is not advanced enough, which not only leads to waste of resources, but also leads to the depletion of ore grade, which will directly affect the ore grade of the deposit and Supply grade. Therefore, at present, China can only rely on the import of a large amount of copper raw materials such as copper concentrate and scrap copper to meet the needs of refined copper production. In the face of huge consumption and growth potential, copper resources are clearly still the "soft underbelly" of China's development. 2. Copper- molybdenum beneficiation technology : separation, use of chemicals Copper-molybdenum separation is one of the technical difficulties in the development of large-scale copper-molybdenum ore. At present, copper-molybdenum separation is mainly based on copper-free molybdenum molybdenum. It is desired to achieve the best effect of copper-molybdenum separation and solve the copper-molybdenum mutual content in copper concentrate and To improve the recovery rate of copper concentrate and molybdenum concentrate, it is necessary to pay attention to the following aspects: (1) Effects of Copper collector importance separation of molybdenum, collector collectors often cause excessive force was difficult to suppress copper, copper-molybdenum causing difficult to separate. (2) With the stricter environmental protection requirements, the ore dressing wastewater is basically reused, and the accumulation and suspended matter of the collector in the return water often affect the separation of copper and molybdenum and increase the difficulty of suppressing copper minerals. (3) In the selection of plants that use water before the plant, it is especially important to pay attention to the impact of water back-off on the separation of copper and molybdenum. (4) The effect of the copper-molybdenum separation inhibitor is one of the main factors determining the separation effect of copper and molybdenum. The collector is a flotation agent that changes the hydrophobicity of the mineral surface and causes the floating mineral particles to adhere to the bubbles. It has two basic properties: (1) it can selectively adsorb on the mineral surface; (2) it can increase the hydrophobicity of the mineral surface, making it easy to adhere to the bubble, thereby improving the mineral floatability. When choosing a collector, follow these guidelines: (1) copper mineral ores into consideration, molybdenum minerals and pyrite and other minerals metals difference of floatability, collector and selectivity of the collector to be appropriate force. (2) The collecting power of the collector should not be too strong, and it can satisfy the collection of copper minerals. Otherwise, copper minerals will be difficult to suppress when copper and molybdenum are separated. (3) When copper to molybdenum is preferred for sulfur, the selectivity of the collector should be considered. (4) At present, the application of more collectors is a compounding agent, which can well take care of the collection of copper minerals and molybdenum minerals. (5) The effect of combination medication is often better than that of single drug flotation. It not only improves the recovery of the target mineral, but also reduces the amount of flotation agent and the cost of ore dressing. Commonly used collectors are xanthate, black medicine, thiourethane, sulphide, and xanthate. Ethanol Distillation Column,Industrial Alcohol Recovery Tower,Fractionating Column,Distillation Tower Wuxi Dingfeng pressure vessel Co., Ltd , https://www.wuxidingfeng.com