Comparison of microwave and conventional blank roasting and of their effects on vanadium oxidation in stone coal
Comparison of microwave and conventional blank roasting and of their effects on vanadium oxidation in stone coal
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微波与常规坯料焙烧对比及其对石煤中钒氧化的影响
DOI：
10.1080/08327823.2016.1190145
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发表时间：
2016-04
影响因子：
1.5
通讯作者：
Huang Jing
中科院分区：
文献类型：
--
作者：
Yuan Yizhong;Zhang Yimin;Liu Tao;Chen Tiejun;Huang Jing
研究了石煤中钒在常规空白焙烧（CBR）和微波空白焙烧（MBR）中的氧化行为及其机理。在两种焙烧方法中，随着温度的升高，钒的氧化速率都有所提高，钒氧化反应的控制步骤由化学控制转变为内扩散控制。在相同的焙烧条件下，MBR比CBR具有更高的钒氧化效率。MBR和CBR的控制步骤分别发生在500-600 °C和600-700 °C的温度范围内。钒的这种氧化行为主要取决于石煤中的还原物质及其反应特性。由于MBR的矿物转化（包括还原性物质的反应和白云母结构的变形）效率高，温度低，因此MBR的钒氧化效率高，控制步骤的变化温度范围小。
ABSTRACT The oxidation behaviour of vanadium in stone coal and its mechanisms in conventional blank roasting (CBR) and microwave blank roasting (MBR) are investigated. In both roasting methods, vanadium oxidation rates are increased and the controlling step of vanadium oxidation reaction is changed from chemical control to internal diffusion control with increasing temperature. Compared to CBR, MBR was more efficient in vanadium oxidation under same roasting conditions. The change of controlling step occurred at the temperature range of 500–600 °C and 600–700 °C for MBR and CBR, respectively. This oxidation behaviour of vanadium was mainly dependent on the reducing materials in stone coal and their reaction characteristics. Due to efficient and the lower temperatures of mineral transformations (including reaction of reducing materials and deformation of muscovite structure), MBR had higher vanadium oxidation efficiency and lower temperature range of changing the controlling step than CBR.
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DOI：
--
发表时间：
2011
期刊：
The Chinese Journal of Nonferrous Metals
影响因子：
--
作者：
Xi Xiao-guang
通讯作者：
Xi Xiao-guang
影响因子：
8.8
作者：
Wang Mingyu;Xiang Xiaoyan;Xiao Liansheng
通讯作者：
Xiao Liansheng
影响因子：
4.8
作者：
Rizmanoski, Vladimir
通讯作者：
Rizmanoski, Vladimir
影响因子：
--
作者：
Zhong-jun Ju;Chengya Wang;Fei Yin
通讯作者：
Zhong-jun Ju;Chengya Wang;Fei Yin
影响因子：
4.8
作者：
Yi-min Zhang;Yangjia Hu;Shenxu Bao
通讯作者：
Yi-min Zhang;Yangjia Hu;Shenxu Bao