Analysis on conditions of carbon infiltration in coke pores
LI Dong-tao1,2, CHENG Xiao-guang3, XUE Li-min1,2, LIAO Hong-qiang4
1. Beijing key Laboratory of Green Recyclable Process for Iron and Steel Production Technology, Beijing 100043, China; 2. Shougang Research Institute of Technology, Shougang Group Co., Ltd., Beijing 100043, China; 3. Tangshan Caofeidian Dunshi New Material Company, Tangshan 063200, Hebei, China; 4. Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030001, Shanxi, China
Abstract：The synthetic coke oven gas was used to carry out the carbon deposition reaction in coke, which verified the improvement effect of this method on the thermal strength of coke. At the same time, in the real coke oven gas atmosphere, the influence of temperature and isothermal time on the effect of carbon deposition effect was investigated. And the changes in the surface area and pore volumes of carbon before and after carbon deposition were tested. The results showed that the thermal strength of coke can be significantly improved by carbon deposition. Using real coke oven gas to deposit metallurgical coke, the longer the carbon infiltration time, the better the effect of carbon deposition. However, the law was different at different temperatures. At 950 and 1 000 ℃, the best carbon deposition time was 3 hours. Based on the test of the pore volume and BET(Brunauer-Emmett-Teller) specific surface area of the coke before and after the carbon deposition reaction, it was proved that the deposited carbon mainly filled the pore volume of the coke, thickened the pore wall, reduced the specific surface area of the coke, and slowed the reaction rate of the coke and carbon dioxide, thus improving the thermal strength of coke after reaction.
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2021, Vol. 31 
