Abstract:Iron and steel is the basic industry supporting the development of national economy, but it was also belongs to the resource and energy intensive industry. With the gradual implementation of the national environmental protection policy, it is faced with increasing resources and environmental protection. Due to the disadvantages of high energy consumption and high pollutant discharge, the development of the traditional blast furnace ironmaking process has been greatly restricted, and the non-blast furnace ironmaking process attracts more and more attention. The dissolution characteristic and kinetic behavior of different cokes are investigated in molten iron. The results showed that the process of coke and hot metal contact consumption is dominated by dissolution reaction, because the Gibbs free energy of dissolution reaction occurs when the hot metal contact with carbon atoms is much smaller than that of the formation reaction of Fe3C. The rapid dissolution reaction occurred after coke contacting hot metal. The content of carbon in hot metal increased rapidly, but the increased range decreased rapidly with the high carbon content. After the dissolution reaction time exceeds 120 min, the carbon content in hot metal basically remains constant. The order of the dissolution reaction rate of different coke from high to low was stamp-charging coke, top-charging coke and gas coal coke. The temperature of hot metal had an obvious effect on the dissolution reaction. With the increase of temperature, both the dissolution reaction rate and the amount of carbon in hot metal increased. At last, the average activation energy of stamp-charging was largest, followed by top-charging coke, and that of gas coal coke is the smallest by kinetic analysis.
于春梅, 滕海鹏, 林豪, 任坤, 王广伟. COREX用焦在铁水中的渗碳特性[J]. 钢铁, 2021, 56(11): 39-46.
YU Chun-mei, TENG Hai-peng, LIN Hao, REN Kun, WANG Guang-wei. Coke dissolution characteristics in molten iron of COREX[J]. Iron and Steel, 2021, 56(11): 39-46.
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