Treatments of electric arc furnace dust and halogenated plastic wastes: A review

Al-Harahsheh, Mohammad; Al-Nu’airat, Jomana; Al-Otoom, Awni; Al-hammouri, Isra’a; Al-jabali, Huda; Al-zoubi, Mais; Al’asal, Shaima’a Abu

doi:10.1016/j.jece.2018.102856

Cited by 76 publications

(35 citation statements)

References 224 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The particle size is 0.1 μm to > 200 μm. Therefore, EAF can be airborne, which makes it difficult to handle or separate using physical methods [97]. Due to the presence of salts (NaCl and KCl), the soluble fraction can be up to 10 wt%.…”

Section: Chemistry and Mineralogymentioning

confidence: 99%

“…Hydrometallurgical processes can recover metals other than zinc, such as lead, cadmium, and copper, generating iron oxide with less metal contamination. As well as pyrometallurgical and hydrometallurgical methods, EAF dust can be used in construction or as a filler in acoustic or thermal insulators [97].…”

Section: Pyrometallurgical Versus Hydrometallurgical Processesmentioning

confidence: 99%

See 1 more Smart Citation

Hydrometallurgical Processes for the Recovery of Metals from Steel Industry By-Products: A Critical Review

Binnemans

Jones

Fernández

et al. 2020

J. Sustain. Metall.

View full text Add to dashboard Cite

The state of the art for the recovery of metals from steel industry by-products using hydrometallurgical processes is reviewed. The steel by-products are different slags, dusts, and sludges from a blast furnace (BF), basic oxygen furnace (BOF), electric arc furnace (EAF), and sinter plant, as well as oily mill scale and pickling sludge. The review highlights that dusts and sludges are harder to valorize than slags, while the internal recycling of dusts and sludges in steelmaking is inhibited by their high zinc content. Although the objectives of treating BF sludges, BOF sludges, and EAF dust are similar, i.e., the removal of zinc and the generation of an Fe-rich residue to be returned to the steel plant, these three classes of by-products have specific mineralogical compositions and zinc contents. Because wide variations in the mineralogical composition and zinc content occur, it is impossible to develop a one-size-fits-all flow sheet with a fixed set of process conditions. The reason for the interest in EAF dust is its high zinc content, by far the highest of all steel by-products. However, EAF dust is usually studied from the perspective of the zinc industry. There are not only different concentrations of zinc, but also variations in the all-important ZnO/ZnFe2O4 (zincite-to-franklinite) ratio. In many chemical processes, only the ZnO dissolves, while the ZnFe2O4 is too refractory and reports to the residue. It only dissolves in concentrated acids, or if the dust is pre-treated, e.g., with a reductive roasting step. The dissolution of ZnFe2O4 in acidic solutions also brings significant amounts of iron in solution. Finally, due to its high potassium chloride content, sinter-plant dust could be a source of potassium for the fertilizer industry. Graphical Abstract

show abstract

Section: Chemistry and Mineralogymentioning

confidence: 99%

Section: Pyrometallurgical Versus Hydrometallurgical Processesmentioning

confidence: 99%

Hydrometallurgical Processes for the Recovery of Metals from Steel Industry By-Products: A Critical Review

Binnemans

Jones

Fernández

et al. 2020

J. Sustain. Metall.

View full text Add to dashboard Cite

show abstract

“…Furthermore, its recycling capacity contributes to saving natural resources and improving sustainability (Asturiana de Zinc, 2017). Previously, zinc production was limited to the extraction from its minerals through metallurgical processes, however, zinc has been identified as one of the elements whose supply may be potentially limited in nature (Al-harahsheh et al, 2018a). For this reason, metal recovery from secondary resources and industrial waste is currently an interesting alternative (Zhu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…are also dissolve into the solution and 2) the acidic solution is corrosive to the metallurgical instruments, leading to a higher cost of recovery. The operation using HNO 3 is expensive, non-ecological and generally unsafe (Al-harahsheh et al, 2018a). With H 2 SO 4 , the dissolution of the metal is favored by increasing temperature: Extractions of 50%, 55% and slightly more than 60% of zinc were reached at temperatures between 20 and 80 ºC (Havlik et al, 2005;Oustadakis et al, 2010], although with co-dissolution of large amounts of iron (approximately 45%).…”

Section: Introductionmentioning

confidence: 99%

Comparative study of selective zinc leaching from EAFD using carboxylic agents

Borda¹,

Torres²

2020

Rev.Mex.Ing.Quim.

View full text Add to dashboard Cite

show abstract

“…Для селективного извлечения цветных металлов предлагаются довольно сложные многостадийные процессы [12 - 16]. В последние годы широко обсуждается вопрос утилизации ПВХ при совместной переработке с пылью ДСП [17].…”

unclassified

Selective extraction of carbon-free zinc and lead from EAF-dust

Simonyan

Демидова

2020

Izv. vysš. učebn. zaved., Čern. metall.

View full text Add to dashboard Cite

In electric-arc furnace dust zinc content can reach 43 %, lead content can reach 4 %. The content of ecotoxicants such as dioxins and furans (D&F) adsorbed on dust particles achieve 500 ng/kg of dust. Generally, zinc and lead are reduced from their oxides by dint of carbon (an average of 500 kg/t dust). The results of thermodynamic calculations and experimental studies have shown that these metals can be extracted from dust without the participation of carbon or at its low content (less than 3 %) [1]. Temperature of about 1400 K is required to extract lead, and about 2000 K is required for zinc extraction. The temperatures of their extraction depend on the dust composition, in particular, on the content of carbon, chlorine and the O/C ratio [2]. They can also depend on phase and dispersed composition of the dust. A physicochemical analysis of the dust formation processes in electric arc furnaces (EAF) has been carried out, the composition and properties of dust have been investigated, and experimental studies of the zinc and lead selective extraction process in laboratory conditions have been leaded. A dust processing technology has been developed and the possible innovative potential of the expected results has been assessed. The approaches we propose are based on the study of a continuous two-stage process of carbon-free and zinc and lead selective extraction from EAF dust of different composition. One of the main results of the work, along with the creation of a technology that ensures the selective zinc and lead extraction up to 99 %, is the development of a process for neutralizing EAF dust from D&F to an environmentally safe level.

show abstract

Treatments of electric arc furnace dust and halogenated plastic wastes: A review

Cited by 76 publications

References 224 publications

Hydrometallurgical Processes for the Recovery of Metals from Steel Industry By-Products: A Critical Review

Hydrometallurgical Processes for the Recovery of Metals from Steel Industry By-Products: A Critical Review

Comparative study of selective zinc leaching from EAFD using carboxylic agents

Selective extraction of carbon-free zinc and lead from EAF-dust

Contact Info

Product

Resources

About