Characterization of dolochar wastes generated by the sponge iron industry

查看全文 作　　者：Ranjan Kumar [1]Dwari;Danda Srinivas [1]Rao;Akhila Kumar [2]Swar;Palli Sita Ram [1]Reddy;Barada Kanta [1]Mishra

机构地区：[1]CSIR-Institute of Minerals and Materials Technology;[2]Odisha State Pollution Control Board

出　　处：《International Journal of Minerals,Metallurgy and Materials》索引2012年第19卷第11期,共12页

基　　金：the Odisha State Pollution Control Board,Bhubaneswar,India 摘　　要：Solid wastes generated by the metallurgical industry contribute significantly towards the enhancement of environmental pollution. The handling, utilization, and safe disposal of these solid wastes are major concerns for the world. Dolochar is such a solid waste generated by the sponge iron industry. Investigations were carried out on the physical, mineralogical, and chemical characteristics for the efficient utilization of dolochar. The detailed studies on physico-chemical properties and petrography were carried out by optical microscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Characterization studies revealed that the dolochar consists of quartz (free as well as locked), free lime, Fe particles, and Ca or Mg and/or Ca+Mg+Fe oxide phases. The washability data of-300 μm dolochar samples indicated that clean coal with 41wt% ash at 18% yield can be produced from dolochar with 78wt% ash. The studies further suggested that the liberation of the dolochar is hard to achieve for clear separation. The dolochar is observed to have high ash fusion temperature and the unburned carbon can be best utilized for power generation. 关键词：工业固体废物海绵铁表征行业扫描电子显微镜 X-射线衍射光学显微镜灰熔融温度

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Characterization of dolochar wastes generated by the sponge iron industry

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