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| Lime activity and microstructure by microwave heating |
| AI Li-qun, ZHANG Xiao-mei, ZHANG Yan-long, HONG Lu-kuo |
| College of Metallurgy and Energy, Hebei United University, Tangshan 063009, Hebei, China |
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Abstract Three different limestones as raw material were selected to study, the effect of microwave heating and limestone with different structures on the lime activity, and the microstructure of the lime was observed. The experimental results indicated that high activity lime can be produced with microwave heating at low temperature and short holding time. The activity of lime procluced by microwave heating exceeds 400 mL, which is 25 mL higher than that produced by traditional method, and the highest lime activity can be up to 435mL. The lime activity can decline when the structure of limestone is compact and the grain size distribution is not uniform.The microstructure of active lime is porous structure and made up with tiny CaO grain.
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Received: 23 December 2013
Published: 12 January 2015
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ZHANG Qu Fei. Study on production process of activated lime using the co-current heat accumulated kiln with double shafts[J]. CONSERVATION AND UTILIZATION OF MINRAL RESOURCES, 2005, 4(2):36-38. 孙全应, 张巧灵. 活性石灰生产及在炼钢中的应用[J]. 特钢技术, 2004, 27(2):19-20. KINGMAN S W, JACKSON K, CUMBANE A, et al. Recent development in Microwave-assisted comminution[J]. Int. J. Miner. Process, 2004, 74:71-83.蔡卫权, 李会泉, 张懿. 微波技术在冶金中的应用[J]. 过程工程学报, 2005, 5(2):228-232.赵东林，罗发，周万城．纳米碳化硅、氮化硅和掺杂氮碳化硅粉体的制备及其微波介电特性[J]．硅酸盐学报，2008,36(6):783-787．中华人民共和国黑色冶金行业标准YB/T105-2005.2005-07-26发布. 冶金石灰物理检测方法[S]. 中华人民共和国冶金工业部.
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2015, Vol. 50 
