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Comprehensive Utilization of Iron-Bearing Converter Wastes

In: Recovery and Utilization of Metallurgical Solid Waste

Author

Listed:
  • Hu Long
  • Dong Liu
  • Lie-Jun Li
  • Ming-Hua Bai
  • Yanzhong Jia
  • Wensheng Qiu

Abstract

Basic oxygen furnace (BOF) sludge is composed of not only valuable iron but also impurities like Zn, Pb, and some alkaline oxides. It is collected from wet cleaning system in steelmaking plants. How to deal with these double identity wastes? Will the traditional landfill treatments result in environmental pollution? What technologies have been developed recently, and is it actually useful? In this chapter, physical-chemical properties and mineralogical phases of converter sludge were characterized, and different recycling technologies were introduced. The proven metalized pellet-producing process would be highlighted that green pellets made from iron-bearing sludge are dried and preheated in a traveling grate firstly, and then reduced at high temperature in a rotary kiln or a rotary hearth furnace (RHF) to get direct reduced iron (DRI), served as a good iron source for blast furnace.

Suggested Citation

  • Hu Long & Dong Liu & Lie-Jun Li & Ming-Hua Bai & Yanzhong Jia & Wensheng Qiu, 2019. "Comprehensive Utilization of Iron-Bearing Converter Wastes," Chapters, in: Yingyi Zhang (ed.), Recovery and Utilization of Metallurgical Solid Waste, IntechOpen.
    • Handle: RePEc:ito:pchaps:159127
    DOI: 10.5772/intechopen.80329
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    More about this item

    Keywords

    BOF sludge; iron bearing; metalized pellet; direct reduced iron; environment friendly;
    All these keywords.

    JEL classification:

    • Q53 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Air Pollution; Water Pollution; Noise; Hazardous Waste; Solid Waste; Recycling

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