CHARACTERIZATION OF THE DUST GENERATED IN THE RECYCLING PROCESS OF THE ELECTRIC ARC FURNACE DUST
Electric Arc Furnace Dust (EAFD) is a solid waste generated by the production of steel through the Electric Arc Furnace. This waste is labeled dangerous, which motivates studies aiming its recycling. Experiments were made to study a pyrometallurgical process for the recycling of the dust, using th...
| Published in: | Tecnologia em Metalurgia, Materiais e Mineração |
|---|---|
| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia, Materiais e Mineração
2013-10-01
|
| Subjects: | |
| Online Access: | http://www.tecnologiammm.com.br/files/v10n3/v10n3a05.pdf |
| Summary: | Electric Arc Furnace Dust (EAFD) is a solid waste generated by the production of steel through the Electric Arc
Furnace. This waste is labeled dangerous, which motivates studies aiming its recycling. Experiments were made to study
a pyrometallurgical process for the recycling of the dust, using the insertion of dust briquettes in molten pig iron in three
temperatures. In the briquettes, there were made additions of calcium fluoride in four different concentrations. This
paper has the objective to characterize the dust that results from this process, verifying the influence of the temperature
and the concentration of calcium fluoride in the briquette in the morphology and chemical composition of the new dust,
determining the optimal conditions for the recovery of the zinc content of the dust. This newly generated dust was
analyzed in an Scanning Electronic Microscope, used to capture micrographs and chemical composition by EDS. The
micrographs show that the temperature and the calcium fluoride concentration interfere in the way the dust particles
agglomerate. Chemical analysis points that the higher zinc recuperation occurrs in the experiments at 1500°C with 7%
addition of calcium fluoride. |
|---|---|
| ISSN: | 2176-1515 2176-1523 |