微波加热内配碳酸钙高碳锰铁粉固相脱碳试验研究  

Solid-phase Decarburization of High-carbon Ferromanganese Powders Containing Calcium Carbonate by Microwave Heating

作　　者：郭丽娜[1] 陈津[1] 郝赳赳[1] 张森浩[2] 王紫林 

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]太原理工大学现代科技学院,太原030024

出　　处：《太原理工大学学报》2014年第2期191-195,共5页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金委员会与上海宝山钢铁集团公司联合资助项目(50974149)

摘　　要：以碳酸钙为脱碳剂,采用微波加热进行高碳锰铁粉固相脱碳,可避免高温下金属锰的蒸发,实现高碳锰铁粉快速固相脱碳。试验结果表明,内配碳酸钙高碳锰铁粉在微波加热场中进行固相脱碳,脱碳物料的碳含量随脱碳温度的升高、保温时间的延长、配碳比的增加而降低。高碳锰铁粉在微波加热场中固相脱碳物料的XRD物相分析结果表明,脱碳物料的氧化程度随脱碳温度升高而加剧。综合考虑,适宜的脱碳条件为:脱碳温度1 000℃,脱碳时间为60min。内配碳酸钙高碳锰铁粉在微波加热场中和常规加热场中分别加热到900,1 000,1 100,1 200℃并保温脱碳60min,微波加热场中脱碳率分别为76.69%,82.90%,84.11%,85.75%,远高于常规加热场的脱碳率(34.14%,48.28%,49.66%,63.03%),微波加热能增强碳的扩散能力,显著提高了脱碳效率。The solid-phase decarburization of high-carbon ferromanganese powders can avoid evaporation of manganese and realize rapid deearburization of high-carbon ferromanganese using calcium carbonate powders as decarburizer by microwave heating. Experimental results show that high-carbon ferromanganese powders containing calcium carbonate were heated to a certain tem- perature and decarburized at some holding time by microwave heating, carbon content of decarburization materials decreased with increasing decarburization temperature, holding time and decarburization mole ratio. XRD results show that oxidization degree of decarburized material increased with increasing decarburization temperature. Comprehensively, suitable decarburization condition was decarburization temperature of 1 000℃ and holding time of 60 min. High-carbon ferromanganese powders containing calcium carbonate were heated up to 900℃, 1 000℃, 1 100℃, 1 200℃ and decarburized for holding time of 60 min by microwave heating at decarburization ratios of 76.69%, 82.90%, 84.11%, and 85.75%, respectively. These ratios were higher than the decarburization ratios obtained by conventional heating （31.94%, 57.23G, 58.84%, and 88.02%, respectively） under the same experimental conditions. This indicates the microwave heating field visibly enhanced the carbon diffusion ability of high-carbon ferromanganese powders and improved the effect of solid-phase decarburization.

关 键 词：微波加热 高碳锰铁粉 固相脱碳 

分 类 号：TF19[冶金工程—冶金物理化学]