摘要
为解决钒钛磁铁矿难还原的问题,以钒钛磁铁矿粉为原料,以葡萄糖为碳源,采用水热炭化法对钒钛磁铁矿粉进行碳包覆,研究微波加热下碳包覆对矿粉还原的影响。结果表明,钒钛磁铁矿粉在1100℃下还原产物成分为Fe,碳包覆钒钛磁铁矿粉在900℃下还原产物成分仅为Fe,微波加热下碳包覆可以降低钒钛磁铁矿粉的还原温度;在700~900℃下还原时,碳包覆钒钛磁铁矿粉还原产物金属化率大于钒钛磁铁矿粉,微波加热下碳包覆可以提高钒钛磁铁矿粉还原产物金属化率;钒钛磁铁矿粉还原产物表面有大量铁晶须,碳包覆钒钛磁铁矿粉还原产物表面光滑,微波加热下碳包覆可减少钒钛磁铁矿粉还原过程中铁晶须的产生;钒钛磁铁矿粉最佳还原条件为碳包覆后在900℃下微波还原2 h。
In order to solve the problem of difficult reduction of vanadium titanium magnetite,vanadium titanium magnetite powder was used as raw material and glucose was used as carbon source,and the hydrothermal carbonization method was used to carbon coat the vanadium titanium magnetite powder.The effect of carbon coating on the reduction of mineral powder under microwave heating was studied.The results show that the component of the reduction product of vanadium-titanium magnetite powder at 1100°C is Fe,and the component of the reduction product of carbon-coated vanadium-titanium magnetite powder at 900°C is only Fe.Carbon coating under microwave heating can reduce the reduction temperature of vanadium titanium magnetite powder.When reduced at 700~900°C,the metallization rate of the reduction product of carbon-coated vanadium titanium magnetite powder is greater than that of vanadium titanium magnetite powder.Carbon coating under microwave heating can improve the metallization rate of the reduction product of vanadium titanium magnetite powder.There are a large number of iron whiskers on the surface of the reduction product of vanadium-titanium magnetite powder.The surface of the reduction product of carbon-coated vanadium-titanium magnetite powder is smooth.Carbon coating under microwave heating can reduce the generation of iron whiskers during the reduction process of vanadium-titanium magnetite powder.The optimal reduction condition of vanadium-titanium magnetite powder is carbon coating and microwave reduction at 900°C for 2 h.
作者
郝素菊
武怡昊
蒋武锋
高一策
HAO Suju;WU Yihao;JIANG Wufeng;GAO Yice(School of Metallurgy and Energy,North China University of Science and Technology,Key Laboratory of Modern Metallurgical Technology,Ministry of Education,Tangshan 063210,China)
出处
《粉末冶金工业》
北大核心
2024年第6期26-32,38,共8页
Powder Metallurgy Industry
基金
河北省自然科学基金资助项目(E2022209125)
关键词
微波
碳包覆
钒钛磁铁矿
强化还原
铁晶须
microwave
carbon coating
vanadium titanium magnetite
enhanced reduction
iron whisker
