Zhejiang Kehao Plastic Machinery Co., Ltd. , https://www.khplasticmachinery.com
Dong Shiyi, deputy general manager of Yunnan Aluminum Co., Ltd., said that the development of aluminum electrolysis technology in the world today is mainly reflected in the continuous increase in the production capacity of electrolytic cells. The development of China's aluminum industry started late. In the 1970s, the company used a 20-kilometer electrolytic cell, which can only produce more than 100 kilograms of aluminum per day, but it consumes a lot of electricity. It costs 17,000 kWh per ton of aluminum. The pollution is also more serious. At the same time, foreign countries have imposed strict technical blockade on the 300-kilometer-class electrolyzer, and neither Chinese nor the technology has been transferred.
In order to break the foreign technology monopoly, in 2000, Yunnan Aluminum Co., Ltd. and Guiyang Aluminum and Magnesium Design and Research Institute began research and development of high quality, low cost, low consumption and low pollution electrolytic cells. On the basis of the 280 kA large-scale aluminum electrolyzer technology developed in China, the Yunan Phase II technical transformation project eliminated the design and transformation of the 60 kA self-baking tank to 300 kA. In June 2005, the China Nonferrous Metals Industry Association organized experts to carry out technical appraisal of the “Cloud Aluminum CHYG-30 Prebaked Aluminum Electrolytic Cell System Technology Development and Application†project. It is agreed that the integrated technology of this cell has reached the international level. Level, for example, its annual production capacity has expanded from 25 kilotons to 200 kilotons; power consumption has been greatly reduced, saving 200 million kilowatt hours per year, and the average cost per kilowatt is 0.37 yuan, saving about 70 million yuan. The reporter saw in the factory that 248 troughs were in normal operation, neither smelling of nose nor dust, and the ground of the factory was very clean. Dong Shiyi said that in the past, both alumina and fluoride salts had dust, and now they are recycled by the corresponding technology, and the recovery rate reaches 98%. The project won the first prize of Yunnan Science and Technology Progress with its many advantages.
The industry believes that the CHYG-30 electrolyzer has been put into production since April 2004, the equipment is operating normally, the technical parameters of the production process are stable, the bath temperature, voltage and effect control effect are better, and the current efficiency is as high as 94%. “If large-scale aluminum plants that are under construction and renovation in China and have an annual output of more than 200,000 tons are promoted, they will save a lot of capital and energy for national enterprises, reduce production costs and pollutant emissions, and enhance the international aluminum industry in China. Competitiveness." Dong Shiyi said.
China's extra large aluminum electrolytic cell technology application step
The cloud aluminum CHYG-30 extra large aluminum electrolytic cell adopts new technology, new materials and new technology in the design, roasting start, process control and other aspects, and has created a series of 200,000 tons electrolytic aluminum production in China with high efficiency, energy saving and environmental protection. The technology of China's aluminum industry has reached a new level.