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| Application of dry vacuum pump system for VD refining furnace in Baosteel |
| WANG Yu-chang1,2, LIU Ping2, ZHANG Jia-quan1 |
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2. Steel Plant, Baotou Steel Group Co., Ltd., Baotou 014010, Nei Mongol, China |
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Abstract In view of the steam jet vacuum pump system with high energy consumption, large quantity of maintenance and other disadvantages, various dry mechanical vacuum pump systems have received wide attention in recent years. Based on the practice in Baotou Steel, the principle of the dry vacuum system was elaborated along with the description of its configuration and working process. Besides, the system automation and related software adopted in Baotou Steel were introduced in detail, and objective evaluation was given for the overall performance. Accordingly, the original steam pump group was replaced by a kind of dry vacuum pump in 100 t VD vessel at Baotou Steel, which produced obvious positive results of energy-saving up to 95% together with maintenance free. As a result, the high vacuum arrival time during VD process can be controlled within 5 min, and the [H] in liquid steel is below 0.000 25% after VD treatment, which meets the requirements of most quality steels production, including high speed railway steels.
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Received: 15 May 2014
Published: 12 January 2015
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2015, Vol. 50 
