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Utilization of blast furnace sludge for the removal of zinc from steelmaking dusts using microwave heating

Mamdouh Omran, Timo Fabritius

2018enblast furnacezinc removalmicrowave heatingsteelmakingrecycling

Abstract

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Utilization of dusts generated by steelmaking industries prevents the disposal of wastes and enhances the use of secondary raw material. This work aimed to study the simultaneous recycling of steelmaking dust and blast furnace sludge (BFS) by using microwave heating. The possibility of utilizing BFS as a reducing agent to remove zinc from the dusts was studied. Three steelmaking dusts obtained from steel plants in Finland with varying zinc concentrations and zinc-containing phases were studied. Mixtures of the dusts and graphite, bulk BFS, >250 µm BFS, and >125 –250 µm BFS reductants were heated for 20 min at the microwave power of 1100 W. The results indicated that the zinc removal efficiency depends on the amounts of iron oxide and calcium oxide in the mixtures. The highest zinc removal was observed for mixtures with high calcium oxide and low iron oxide contents. Zinc removal of 92.79 –96.06% was achieved for mixtures with >125 –250 µm BFS and >250 µm BFS.

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Cite This Work

@article{931f8701-b2f1-4ad2-ba50-07acb059747a,
  title={Utilization of blast furnace sludge for the removal of zinc from steelmaking dusts using microwave heating},
  author={Mamdouh Omran and Timo Fabritius},
  year={2018},
  language={en}
}
TY  - JOUR
TI  - Utilization of blast furnace sludge for the removal of zinc from steelmaking dusts using microwave heating
AU  - Mamdouh Omran
AU  - Timo Fabritius
PY  - 2018
LA  - en
ER  -

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