Abstract
During the ironmaking, steelmaking and steel rolling processes, steel enterprises generate a large amount of solid waste including iron, zinc, dust (ash) and mud, accounting for about 10% of the total steel production [1]. These solid wastes mainly include fly ash or sludge of blast furnace and rotary hearth furnace and some steel rolling sludge. The traditional way is to recycle these sediment (ash) as ingredients and return them to sintering, achieving internal recycling and utilization within the enterprise. However, some of the ash contains high levels of harmful elements such as zinc and lead. Directly returning to the batching process will cause zinc and lead to continuous circulation and enrichment in the system, resulting in excessive loads of zinc and lead in blast furnaces, which seriously affects the safety, stable production, and equipment life of steelmaking enterprises.
Published Version
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