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Research and application of optimized pulverized coal blending structure of blast furnace based on mixture design |
LIU Wen-wen1,2, QI Yuan-hong1, LI Hao-kun2, SHI Yong-lin2 |
1. State Key Laboratory of Advanced Steel Processing and Products,Central Iron and Steel Research Institute, Beijing 100081, China; 2. Technology Center,Taiyuan Iron and Steel Group Co., Ltd., Taiyuan 030003, Shanxi, China |
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Abstract In order to solve the problem of contradiction between the cost and the quality of pulverized coal blending in TISCO, the experiment design was carried out by using the extreme vertex method in the mixture design, and a multi-index response optimization model was established. According to the characteristics of the coal type in TISCO, anthracite, Qingxu coal, Fugu coal and Lancan coal were used as four factors of blending, and the coal blending cost, fixed carbon content, volatile content, ash content, sulfur content and calorific value were optimized and analyzed. Under the current price system, the result showed that when the proportion of anthracite, Qingxu coal, Fugu coal and Lancan coal was 18∶36∶34∶12, the comprehensive benefit of coal blending cost and coal quality was the best. This research was applied in the practice production of coal blending, the fixed carbon mass fraction was higher than 72%, the fuel ratio was reduced by 10 kg/t, and the cost of coal blending was significantly reduced.
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Received: 27 March 2020
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