Determination of Physical and Chemical Properties of Electric Arc Furnace Dusts for the Purposes of Their Utilization

Abstract

Electric arc furnace dusts are among the most environment polluting wastes. Numerous utilization technologies have been developed for dusts containing up to 4% of Zn and more than 20% of Zn. However, the remaining part of steelmaking dusts are the most problematic ones, as they are mostly dumped generating costs and posing serious environmental threats. This paper provides an analysis of the potential utilization options for dusts containing ca. 10% of zinc generated in a single electric steelmaking shop. Physical and chemical properties of dusts have been determined and examined, and furthermore, results of the studies on the EAFD utilization in production of cement clinker and industrial glass have been discussed. It has been found that a particularly beneficial feature of the production technology proposed is that the iron content exceeds 30%. The influence of the dusts used on the functional properties of the products obtained has been established as well as the environmental impact of the processes and products in question and the dust mass possible to be utilized in the production technology proposed have been determined.

Magnetic adsorbent based on the electric arc furnace dust for the removal of methylene blue dye from aqueous solution

“…In previous studies, zinc was represented as the major element among all other elements in EFAD, with a value between 7 and 40 wt%. 2,23,24 However, in the present study, the amount of zinc is about 0.4 wt%, which is significantly lower compared with reported previous works.…”

“…The chemical and physical properties of EFAD (Figure 2a) considered in this study is including (a) dimensions and shape of particles, (b) density: absolute, bulk, and tapped dust density, (c) grain composition, (d) dampness and hygroscopicity, (e) porosity of dust shell, (f) cone angle of heaped dust and angle of repose dust. 2,22 On the other hand, XRD patterns (Figure 2b) confirmed the presence of magmatic compounds in EAFD, and from the Mössbauer spectra, the material EFAD presents 18% of the iron phases of magnetite. 9,22 This characterization confirmed that EFAD potency is admissible for separating magnetic compounds for using as the magnetic adsorbent for water treatment.…”

Modificação e caracterização do resíduo pó de aciaria elétrica (PAE) para aplicação em reações de redução de cromo (VI)

“…Atualmente, cerca de 70% do PAE é disposto em aterros industriais, devido à falta de tecnologias alternativas de baixo custo para sua reciclagem. 8 Uma alternativa que tem despertado interesse nos últimos anos é o processo de estabilização química, ou vitrificação, que consiste na produção de materiais cerâmicos para construção civil utilizando como matéria prima o pó de aciaria elétrica, 2,[8][9][10][11] e em reações Fenton heterogêneo para degradação de contaminantes orgânicos. 12 Devido ao alto teor de ferro no PAE, este pode ser um material interessante para aplicações em reações para remediação ambiental, como redução do Cr(VI) para Cr(III …”

Archives of Metallurgy and Materials

“…Its disposal is costly and requires special secure landfills due to a possible elution of heavy metals and, thus, pollution of the environment [5,6]. Otherwise, utilization of the EAF dusts for production of ceramics, concrete, cement clinker, industrial glass [7][8][9] has gained attention recently.…”