The reporter got news from Chinalco's Science and Technology Management Department. The innovative tandem method of Chinalco Shanxi Branch, which was independently researched and developed by Chinalco for five years, passed the technical acceptance and scientific appraisal of China Nonferrous Metals Industry Association. International leading level.

In recent years, as the grade of bauxite has been declining, the production cost has been rising, and how to minimize the cost of alumina production has become an urgent problem for Chinalco and alumina producers. According to the current production status, characteristics of bauxite and the price level of raw fuel, Chinalco has carried out a large number of calculations on production costs, and proposed to use innovative series process instead of mixing method and sintering process to produce alumina, and set up major science and technology projects. Aluminium Shanxi Branch, Chinalco International Shenyang Aluminum and Magnesium Design and Research Institute and China Aluminum Industry Zhengzhou Research Institute jointly undertake and carry out joint research.

According to Liao Xinqin, the person in charge of the major science and technology project, “Innovative series method improves the recovery rate of alumina and sodium oxide in the red mud of Bayer process, so as to achieve the goal of reducing production costs.”

Since the start of work in 2009, the major science and technology project team has optimized the innovation series method and equipment, which greatly optimized the process. The implementation of the innovative series method makes it necessary for the past mixing process to require 6 kiln to balance the two series of Bayer process red mud of the old system. Now only 4 kiln is needed; and compared with 2008, the old system mine consumption is in bauxite. In the case of a decline in grades year by year, not only did it not rise, but it declined significantly. The overall energy consumption of alumina has also dropped by 30%. The research and development of this technology plays a key role in promoting the company's cost reduction, and it is also a major change in the alumina process and equipment produced by the sintering process.

It is understood that in recent years, in accordance with the needs of production, operation and development, Chinalco has carried out a number of major scientific and technological special studies on optimizing the process, reducing production costs, and cutting-edge technology development and occupation of technical commanding heights. Sustainable development provides strong technical support.

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