At this year's G20 summit, China and the United States reached a consensus to jointly cope with the global overcapacity of electrolytic aluminum. It can be seen that overcapacity of electrolytic aluminum has become a global problem. In China, the work of electrolytic aluminum to de-capacity has been advancing. In 2013, China formulated the “Regulations on Aluminum Industry Standards†and laid a policy foundation for China's electrolytic aluminum de-capacity work. This year, Danjiangkou Aluminum Industry in Hanjiang, Hubei Province has dismantled 20,000 tons of electrolytic aluminum production line, leaving 105,000 tons of electrolytic aluminum production line, but not all of them started. As early as the "Twelfth Five-Year Plan" period, Hubei Province has eliminated the backward production capacity of electrolytic aluminum by 127,000 tons, exceeding the national target of 100,000 tons issued to the province. From a national perspective, the capacity situation in the first 10 months of this year is very good. Chen Quanxun, president of the China Nonferrous Metals Industry Association, said that China's electrolytic aluminum output decreased by 290,000 tons compared with the same period of last year, down 1.1% year-on-year. The amount of aluminum inventories is less than 300,000 tons, the operating rate of electrolytic aluminum is around 85%, and the price of aluminum is maintained at 11,500 yuan to 12,500 yuan per ton. The industry has not only got rid of the severe situation of losses for four consecutive years, the first 10 months of this year, aluminum The smelting industry has also realized a total profit of more than 14 billion yuan, and the overall operation of the industry is stable. However, China's aluminum prices have rebounded since 10, stimulating the production of electrolytic aluminum production capacity to accelerate the resumption of production, and the new capacity to be put into production began to gradually release, which indicates that China's 2017 electrolytic aluminum de-capacity work is still challenging. At the same time, closely integrated with the work of de-capacity is the environmentally friendly production of electrolytic aluminum. China's electrolytic aluminum de-capacity should be seen as an excellent opportunity to provide a transition point for China's electrolytic aluminum to achieve environmentally-friendly production in the whole industry. China's aluminum enterprises must see the timing and lay a solid foundation for the smooth progress of the next step in the production capacity in 2017 and the 13th Five-Year Plan. Clean electrical energy The proportion of electricity used in the production cost of electrolytic aluminum is relatively large. In the electrolytic aluminum industry, it can be said that whoever has the cost of electricity can gain an advantage in profitability. Therefore, many aluminum companies in China have adopted the aluminum-electricity joint venture approach to implement the coal-electricity-aluminum integration strategy to reduce the cost of electricity. However, the heavy pollution brought about by fossil fuel combustion and power generation has followed, and it runs counter to the comprehensive environmental protection strategy implemented in China. In recent days, the most serious haze in the north of China has emerged in the north, and many provinces and cities have launched red warnings. Among them, the pollution of aluminum enterprises is hard to blame, especially in Shandong Province, which is the largest aluminum enterprise in China, Xinfa Group and Hongqiao Group have large-scale production plants in the local area, the impact on the environment is immeasurable. China's electrolytic aluminum enterprises have traditionally been dominated by thermal power. Among them, the prevailing self-generating mode has caused frequent problems in environmental protection, and the phenomenon of unapproved construction has occurred repeatedly. In 2015, Guangxi Xinfa Aluminum Power Co., Ltd. received a notice of limited production of environmental protection agencies due to the failure to establish environmental protection facilities. Shandong Weiqiao was required to shut down more than half of its production capacity during the year. In order to respond to the call for environmental protection, China's electrolytic aluminum industry is actively seeking to change and develop an alternative model of “coal-electricity aluminumâ€. Yunnan Aluminum has pioneered the new production mode of “Hydroelectric Aluminumâ€, which replaces coal to provide energy for electrolytic aluminum production. Compared with coal, Yunnan's hydroelectric aluminum production can reduce about one ton of aluminum carbon per ton, reducing emissions by 90%, and reducing carbon dust by 3.68 tons. In terms of wind energy electrolytic aluminum, Chinese researchers have simulated the first aluminum ingots from Xinjiang Daxu City wind power through laboratory tests and pilot tests. Currently, they are building a wind power electrolytic aluminum demonstration project with an annual output of 1,000 tons of aluminum, with an annual output of 40. - The foundation of the 600,000 tons/year wind power aluminum integration project. The non-grid-connected wind power-high-energy-consumption industrial integrated system constructed by the project combines wind power and electrolytic aluminum, which is a new exploration and attempt, and is the first of its kind in the world. If non-grid-connected wind power is applied to seawater desalination, it can solve the problems of wind power grid connection, off-grid, and wind abandonment, and can directly apply green energy to high-energy-consuming industries such as electrolytic aluminum, which can reduce the coal consumption and consumption of grid electricity. Greenhouse gas emissions not only have considerable economic benefits, but also have good social and environmental benefits. The basic theoretical research, experimental verification and supporting technical transformation of these achievements have all been completed. In my domestic Mongolia, in the face of the huge trend of global transformation to low-carbon green development mode, coupled with the abundant wind resources in the Huolin Gol region, Guodian Investment Mengdong Energy Group launched the Mengdong Energy Huolin River circular economy demonstration project. Mengdong Energy not only absorbed wind power through a large proportion of intelligent local power grids, but also greatly reduced the cost of electricity per ton of aluminum. It also successfully solved the problem of spontaneous combustion and pollution caused by the open-pit accumulation of inferior brown coal in the local area, and built the first renewable energy source containing wind power in China. The "coal-electric-aluminum" green recycling industry chain. After more than two years of research and development, Mengdong Energy successfully solved technical problems and built an intelligent local power grid with coordinated operation of wind power and thermal power. The major project of the National 863 Program undertaken by Mengdong Energy, “Operation Control Technology and Demonstration of Isolated Power Grid Containing Renewable Energy†was approved by the Ministry of Science and Technology in August last year. In this intelligent local power grid, it contains 300,000 kilowatts of wind power, 1.8 million kilowatts of thermal power, and an annual output of 810,000 tons of electrolytic aluminum load. This intelligent local power grid has also created a new record. The grid wind power penetration rate reached 38.25% for the first time in China, surpassing the Danish power grid with the highest new energy utilization rate in the world. Through the intelligent local grid wind-fire complementary control technology, 300,000 kilowatts of wind power generates about 1 billion kilowatt-hours per year. The estimated hours of use in 2015 is 3,400 hours, which is more than double the average wind power utilization hours in our district. Red mud environmental treatment There are many wastes in the production process of electrolytic aluminum, and red mud is undoubtedly the most heavily polluted source. In the case that red mud can not be used in large quantities, it is necessary to build a red mud yard for centralized stacking. A slight inattention will have a great impact on the environment. In 2013, China Youth Daily reported on the red mud discharge of Xinfa Aluminum in Zhangping, Shandong Province, which caused local agriculture to reduce production, affected the health of villagers, and difficulties in drinking water. With the increasing attention to environmental pollution problems, in recent years, foreign aluminum companies have transported red mud from pipelines to the vicinity of the yard, and further filtered through a filter press system to make the red mud solid content reach about 75%, and then use a belt conveyor. Or trucks, etc. are sent to the yard. The advantage of this treatment is that the red mud can be piled up on the flat land and the hillside. The red mud is weak after the compaction, and the special anti-seepage measures are not needed at the bottom of the red mud, and the land occupation is effectively reduced, which is beneficial to the landscaping of the site and the surrounding area. . China has always attached great importance to the comprehensive utilization of red mud and carried out research work on comprehensive utilization of multidisciplinary and multi-disciplinary technologies. The differences in the composition and properties of red mud determine the different methods of using red mud. Red mud and its liquid have strong alkalinity, and contain renewable oxides and a variety of useful metal elements, which become the basis for red mud recycling. Red mud contains high content of CAO and SiO2, which can be used to produce Portland cement and other building materials. It can produce special glass by using the content characteristics of SiO2, Al2O3, CaO and MgO and a small amount of TiO2, MnO and Cr2O3. The mud is rich in valuable metals such as iron, strontium and titanium; the red mud has the characteristics of strong alkalinity, high iron mineral content, good particle dispersibility, large specific surface area, good stability in solution, etc. Other fields have broad application prospects. Red mud can be used as raw material for building materials. China has used red mud as raw material to produce Portland cement for more than 40 years. In the 1960s, cement plants were built in Zhengzhou Aluminum Plant and Shandong Aluminum Plant (China Aluminum Henan Branch and Shandong Branch) to reduce or prevent red mud emissions as one of the cement production materials. The utilization measures were indeed implemented in the two factories. The cement plant has used more than 20 million tons of red mud for a long time, and it is the largest way to comprehensively utilize red mud. The raw materials of building materials such as red mud as sintered hollow bricks have also been researched and applied. At present, the production and application of wall materials such as red mud bricks have been promoted, and if they are promoted, they will also be the main direction of red mud utilization. In 2009, Chinalco has used red mud, waste slag, fly ash, and waste limestone as raw materials to produce 3.92 million tons of cement. Red mud can also be used as a coal-burning sulfur-fixing agent instead of limestone. Red mud is an industrial waste produced in the process of alumina production from bauxite, and is rich in CaO. Early studies have shown that red mud has the same desulfurization performance as limestone. China's red mud resources are relatively abundant, but at present these red muds are piled up. If used as a sulfur-fixing agent, two kinds of wastes that are very harmful to the environment can be neutralized, especially alkali red mud, original alkali. Sexuality and hydraulic properties can be weakened or eliminated to achieve the purpose of waste treatment. 2017 will be a key year for China's electrolytic aluminum de-capacity and green production transformation. After a year of hard work and profound progress in 2016, if China's aluminum enterprises can make great strides in environmental protection and waste disposal next year, China's electrolytic aluminum industry is expected to get a new one in the "Made in China 2025" plan. Harvest year. Terpenes and terpenoids are the primary constituents of the Essential Oils of many types of plants and flowers. Essential oils are used widely as fragrances in perfumery and traditional medicine, such as aromatherapy. 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