A major breakthrough in aluminum smelting technology--Zhongfu realizes continuous stop slotting of aluminum electrolysis series
In a normal train, a train in one of the cars is out of order, and the entire train is bound to stop. It would not seem possible to lay down the car if it does not stop; a similar situation also exists in the production of electrolytic aluminum, namely: large aluminum When an electrolysis cell in an electrolysis series needs to be overhauled, it must complete a series of blackouts to complete it.
However, in Henan Zhongfu Industry Co., Ltd., the problem that plagued electrolytic aluminum production for a long time could not be solved. The “National Major Industrial Technology Development Special Project†plan “large-scale aluminum electrolysis series without blackout (full current) technology development and Complete sets of devices developed" on November 22 passed the appraisal.
As the director of the appraisal committee, Kang Yi, president of the China Non-Ferrous Metals Industry Association, commented that the results have solved the technical problems that have plagued electrolytic aluminum production for many years and led to electrified welding. This is a major technological breakthrough in this field and also a non-ferrous industry. Important scientific research results are a model of combining production, learning and research.
Experts at the meeting carefully listened to the project report, reviewed the appraisal data and conducted an on-site inspection of the industry. They believed that the project is an advanced technology for independent innovation. The main innovations are: creative application of current transfer and energy transfer methods, and successful development of a 300kA class. Electrolytic aluminum series stop and grooving technology under full current conditions; independently developed split multi-point shunt, synchronous operation switch group device (Xaar switch) and variable resistance shunt device (Xaar shunt); developed 300kA class The current balance adjustment technology under the strong magnetic field environment of the electrolytic cell greatly weakens the magnetic field strength of the aluminum electrolytic cell welding part, and the full-current welding of the aluminum electrolytic series is realized for the first time. The project has good energy-saving effect, significant economic and social benefits, and has a wide range of popularization and application prospects.
The two key figures of this major technological achievement are worth mentioning. One is the general manager of the project, and Liang Xuemin, the chief engineer of Zhongfu Industry, devoted nearly ten years to this project. He took the lead in putting it forward, with great concentration, and consulting. Proof, today he became a bright star in the aluminum smelting industry; another is Zhang Hongen, chairman of Zhongfu Industry. Although he claims to be an aluminum smelting recruit, he actively advocates mechanism innovation, technological innovation, and management innovation. His innovation results are The introduction of Liang Xuemin, who once designed a 320kA electrolyzer for the country’s frontier, has enabled this project, which has not been implemented for various reasons, to achieve results. He is the “Bole†who promotes stars. He knows how to use people well. In 2004, he established an R&D center. With this platform, Zhongfu Industry is based on independent innovation and solves a large number of technical problems. During the “10th Five-Year Plan†period, Zhongfu Industrial made use of scientific and technological innovation to increase the electrolytic aluminum production capacity from 36,000 tons in 2000 to 185,000 tons in 2005, and the sales revenue increased from 455 million yuan in 2000 to In 2005, it was 2.424 billion yuan. Taxes increased from 38.35 million yuan in 2000 to 282 million yuan in 2005.
As early as December 1995, when the 280kA large-scale aluminum electrolytic cell was started and short-circuit test was conducted for the first time, there was no short-circuiting port caused by blackout operation, which left a deep impression on the experts present. With the continuous expansion of the production scale of aluminum electrolytic series, a production series usually consists of 200 to 300 electrolytic cells, and the series current reaches 300kA or more. Therefore, continuous and smooth operation has become an important prerequisite for efficient and energy-saving production of electrolytic aluminum. The series production capacity of electrolytic aluminum is continuously expanding, and the traditional operation method is still maintained. Can the electrolyzer stop or open operation be changed after a blackout?
Henan Zhongfu Industrial Co., Ltd., Huazhong University of Science and Technology, Zhengzhou Zhongshi Saier Technology Co., Ltd. and other units jointly undertook the national key industrial technology development project approved by the National Development and Reform Commission and the “300kA-class large-scale aluminum electrolytic tank comprehensive energy-saving technology development†project After two years and five months of research, through dozens of laboratory tests and more than ten field tests, the full-current uninterruptible power supply technology was successfully used for the first time in Zhongfu Industrial's 320kA aluminum electrolytic cell overhaul.
On November 22, this research achievement passed the expert appraisal convened by the China Nonferrous Metals Industry Association and the Henan Development and Reform Commission.
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