期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Thermal performance and reduction kinetic analysis of cold-bonded pellets with CO and H2 mixtures 被引量:1
1
作者 Rong-rong Wang Jian-liang Zhang +4 位作者 H-ran Liu An-yang Zheng Zheng-jian Liu Xing-le Liu Zhan-guo Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2018年第7期752-761,共10页
Cold-bonded pellets, to which a new type of inorganic binder was applied, were reduced by H2~CO mixtures with different HJCO molar ratios (1:0, 5:2, 1:1, 2:5, and 0:1) under various temperatures (1023, 1123, 1... Cold-bonded pellets, to which a new type of inorganic binder was applied, were reduced by H2~CO mixtures with different HJCO molar ratios (1:0, 5:2, 1:1, 2:5, and 0:1) under various temperatures (1023, 1123, 1223, 1323, and 1423 K) in a daermogravimetric analysis appaxatus. The effects of gas composition, temperature, and binder ratio on the reduction process were studied, and the microstxucture of re- duced pellets was observed by scanning electron microscopy-energy-dispersive spectrometry (SEM-EDS). The SEM-EDS images show that binder particles exist in pellets in two forms, and the form that binder particles completely surround ore particles has a more significant hin- der effect on the reduction. The reduction equilibrium constant, effective diffusion coefficient, and the reaction rate constant were calculated on the basis of the unreacted core model, and the promotion effect of temperature on reduction was further analyzed. The results show that no sintering phenomenon occurred at low temperatures and that the increasing reaction rate constant and high gas diffusion coefficient could main- tain the promotion effect of temperature; however, when the sintering phenomenon occurs at high temperatures, gas diffusion is hindered and the promotion effect is diminished. The contribution of the overaJl equilibrium constant to the promotion effect depends on the gas composition. 展开更多
关键词 cold-bonded pellets inorganic binder reduction fraction reduction kinetic model sintering phenomenon
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部