Abstract:In response to the problem of rich vanadium-titanium magnetite (VTM) resources in China contrasting with low blast furnace utilization, a HIsmelt process for smelting VTM is proposed. The influence of the process parameters on smelting reduction is analysed under laboratory conditions by simulating smelting reduction. The results show that extending the reaction time reduces the FeO content in the slag by 15.34 wt-%, increasing the reaction temperature reduces the FeO content in the slag by 26.38 wt-%, and inc… Show more
The HIsmelt process is a new molten reduction ironmaking technology with lower energy consumption and carbon emissions than the traditional blast furnace ironmaking route. In the HIsmelt smelting process, the reaction process between solid carbon and iron-bearing slag has its own characteristics. To investigate the kinetic mechanism of iron oxide reduction in slag, the degree of conversion was characterized by measuring the change of CO content of the generated gas during the experiments and analyzed by combining the model fitting method. The experimental results showed the highest agreement with the Avrami-Erofeev equation. The rate-controlling mechanism for the reduction of iron oxides in the slag was judged to be the random nucleation and subsequent growth of the products. In the study, the rate-controlling mechanism and the kinetic parameters of the reduction reaction of iron oxide in slag have been obtained.
The HIsmelt process is a new molten reduction ironmaking technology with lower energy consumption and carbon emissions than the traditional blast furnace ironmaking route. In the HIsmelt smelting process, the reaction process between solid carbon and iron-bearing slag has its own characteristics. To investigate the kinetic mechanism of iron oxide reduction in slag, the degree of conversion was characterized by measuring the change of CO content of the generated gas during the experiments and analyzed by combining the model fitting method. The experimental results showed the highest agreement with the Avrami-Erofeev equation. The rate-controlling mechanism for the reduction of iron oxides in the slag was judged to be the random nucleation and subsequent growth of the products. In the study, the rate-controlling mechanism and the kinetic parameters of the reduction reaction of iron oxide in slag have been obtained.
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