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| Preliminary Study on Effects of Charging System of Blast Furnace on Gas Flow Distribution |
| ZHU Qingtian1,2，CHENG Shusen1 |
| 1. School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Baosteel Branch, Baoshan Iron and Steel Co., Ltd., Shanghai 200941, China |
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Abstract Gas flow distribution affects directly the campaign and efficiency of blast furnace (BF).Ｔhe proper and optimum distribution of gas flow should be provided. However, the closeness and complexity bring great difficulty on measuring the gas flow. In practice, gas flow distribution in stack is estimated by measuring top gas distribution. Recently, numerical simulation is a new and effective method for research on gas flow,The flow field and temperature field of gas were calculated with numerical simulation. According to the velocity field of gas in different parts of BF, it was found that burden distribution is a determinant factor of rational gas flow distribution in the mid and upper stack and formation of cohesive zone. In addition,the gas flow distribution in lower stack can be controlled by blasting mode.The importance of burden distribution is discussed with practice of BF. The conclusion is:a good charging system is the keystone of BF operation, the effect of burden permeability on radial distribution of gas flow is great while the effect of initial gas flow distribution is small, and the gas flow distribution in lower stack is hard to be reflected by top gas flow.
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Received: 01 January 1900
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2008, Vol. 43 
