Modified mechanism and industrial experiment of coke sprayed with ZBS modifier
FAN Yao-gui1, HU Si-xin1, WANG Lin1, WANG Ying-dong2, HE Bin1, ZHU Zi-zong2,3
1. Ironmaking Plant, Yangchun New Iron and Steel Co., Ltd., Yangchun 529600, Guangdong, China; 2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 3. Technology Department, Chongqing Luniu Science and Technology Co., Ltd., Chongqing 400030, China
Abstract：There are drawbacks in multiple varieties and quality fluctuation of coke in the blast furnace of Yangchun New Iron and Steel Co., Ltd. which result in production fluctuation and high cost during iron making. This investigation researched an industrial experiment of coke modification specially. The mechanism and behavior of coke modification were studied by spraying the optimized ZBS coke modifier thoroughly, which was dissolved in water in advance, so as to improve coke strength and smooth the blast furnace iron making processing. The interaction between the ZBS modifier and the coke was also be studied, and the modifying mechanism was also explained. The results show that some carbon complexes and carbon compounds formed in this modified coke, which changed the atomic structure of carbon and improved the graphitization degree of coke. After the modification of coke by ZBS modifier, the coke reactivity index (CRI) decreased by 5.20%, and the coke strength after reaction (CSR) increased by 7.83%. Comparing with the experimental reference period, the temperature fluctuation of blast furnace is small, and the content of S can be controlled. Meanwhile, 100% qualified pig iron was obtained. Among them, the daily production of No.1 blast furnace increased by 75 t, the coke ratio reduced 33.80 kg/t, the combined fuel ratio reduced 11.63 kg/t. By the implementation of the project, the factory achieved a stable production with an increasing production and a reducing coke consumption, which provides a novel approach for increasing production and reducing consumption of blast furnace iron making.
樊尧桂, 胡四新, 王林, 王瑛栋, 何彬, 朱子宗. 焦炭喷洒ZBS改质剂的改性机理及生产实践[J]. 钢铁, 2021, 56(1): 127-132.
FAN Yao-gui, HU Si-xin, WANG Lin, WANG Ying-dong, HE Bin, ZHU Zi-zong. Modified mechanism and industrial experiment of coke sprayed with ZBS modifier[J]. Iron and Steel, 2021, 56(1): 127-132.
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2021, Vol. 56 
