Comprehensive Utilization of Iron-Bearing Converter Wastes

Hu Long, Dong Liu, Lie-Jun Li, Ming-Hua Bai, Yanzhong Jia and Wensheng Qiu

A chapter in Recovery and Utilization of Metallurgical Solid Waste from IntechOpen

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.

Keywords: BOF sludge; iron bearing; metalized pellet; direct reduced iron; environment friendly (search for similar items in EconPapers)
JEL-codes: Q53 (search for similar items in EconPapers)
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Persistent link: https://EconPapers.repec.org/RePEc:ito:pchaps:159127

DOI: 10.5772/intechopen.80329

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