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| Effects of charging patterns of bell-less top blast furnace with two parallel hoppers on burden distribution of stock surface |
| XU Wen-xuan1，CHENG Shu-sen1，NIU Qun1，ZHAO Guo-lei1，CHEN Yan-bo2 |
（1. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China
2. Ironmaking Department， Shougang Jingtang United Iron and Steel Co.， Ltd.， Tangshan 063200， Hebei， China） |
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Abstract In order to investigate the influence of charging patterns on the burden distribution of the stock surface in blast furnace with two parallel hoppers， the full model of bell-less top system with two parallel hoppers in actual 5 500 m3 blast furnace was established， and the motions of burden materials in the cases of the ore （A）-ore （B）-coke charging pattern and the ore-coke charging pattern were calculated by Discrete Element Method， respectively. The effects of charging patterns on the burden distribution of the stock surface were comparative and analyzed. The results show that the burden distribution of the stock surface is different in two different charging patterns， because the burden falling trajectory is not coincident while the ore-A and ore-B are charged into the stock surface. In the radial direction of the stock surface， the influence of charging patterns on the ore volume distribution and the ore/coke ratio distribution of the stock surface is negligible. In the circumferential direction of the stock surface， the standard deviation of the ore volume distribution of the stock surface in the ore-ore-coke charging pattern and the ore-coke charging pattern is 0.133 and 0.147， respectively， and the standard deviation of the ore/coke ratio distribution of the stock surface in the ore-ore-coke charging pattern and the ore-coke charging pattern is 0.074 and 0.086， respectively. The ore volume distribution and the ore/coke ratio distribution of the stock surface is more uniform in the ore-ore-coke charging pattern.
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Received: 27 March 2017
Published: 21 December 2017
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2017, Vol. 52 
