The processing of steelmaking flue-dust: A review

Nyirenda, R.L.

doi:10.1016/0892-6875(91)90080-f

Cited by 134 publications

(81 citation statements)

References 5 publications

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“…Zinc in the flue dusts recirculates in the plants, causing refractory failure and scaffold formation. 1) Storage of these dusts presents a long-term environmental concern, motivating the search for processes or technologies to allow their recycling. Attempts have been made by many investigators to recycle the flue dusts generated from the iron and steelmaking processes, however information on the treatment of BF and BOF dusts is limited.…”

Section: Introductionmentioning

confidence: 99%

“…The low vaporization temperature of zinc leads to its accumulation in the dusts in the off-gases from the iron and steelmaking furnaces. 2) Mineralogical analyses 1) show the presence of zinc in oxide forms, such as zincite (ZnO) and franklinite (ZnFe 2 O 4 ). Iron is found mostly as hematite (Fe 2 O 3 ), magnetite (Fe 3 O 4 ), wustite (FeO), franklinite and metallic iron.…”

Section: Introductionmentioning

confidence: 99%

“…These dusts are removed from the off-gases of blast furnaces (BF), basic oxygen furnaces (BOF) and electric arc furnaces (EAF) either in the form of dry dusts by dry separation methods, or in the form of sludge or filter cake from wet separation methods. 1) Typically the off-gases are ducted to scrubbers for cleaning so that the cleaned gas can be reused within the steelworks and the collected dusts can be dewatered for stockpiling (or further processing) in the form of filter cake.…”

Section: Introductionmentioning

confidence: 99%

“…Attempts have been made by many investigators to recycle the flue dusts generated from the iron and steelmaking processes, however information on the treatment of BF and BOF dusts is limited. Processes investigated include pyrometallurgical, 1,[3][4][5][6] hydrometallurgical [7][8][9] and hybrid processes, [10][11][12] the latter involving a combination of bio-leaching, hydrometallurgical and pyrometallurgical stages. After significant effort in process development, the problem is still not well resolved.…”

Section: Introductionmentioning

confidence: 99%

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Mineral Phase Formation and Zinc Removal during Sintering of Filter Cake Wastes

Wang

Pinson²,

Chew³

et al. 2016

ISIJ International

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A large amount of filter cake wastes are produced from the gas cleaning systems of blast furnace (BF) ironmaking and basic oxygen furnace (BOF) steelmaking processes. The filter cake wastes cannot be directly recycled through the ironmaking process due to the high zinc contents and are therefore, predominantly, stockpiled. The storage of filter cake wastes presents a long-term environmental issue but also an opportunity to extract or recover the iron content, motivating a search for processes or technologies to allow their cost-effective recycling. In this study, two filter cake wastes from BlueScope Ltd. were sintered at 1 100-1 300°C in argon and air to evaluate the effects of temperature, gas atmosphere and carbon content on the mineral phase formation and zinc removal of sintered filter cake specimens. The fine particles in filter cake can be well aggregated by bonding phases (calcium ferrites and silicates) during sintering due to the presence of flux materials, CaO and SiO 2 , in the filter cake. Carbon and metallic iron in the filter cake reduced ZnO to zinc vapour during sintering, which enhanced the zinc removal of the filter cake in a reducing gas atmosphere.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mineral Phase Formation and Zinc Removal during Sintering of Filter Cake Wastes

Wang

Pinson²,

Chew³

et al. 2016

ISIJ International

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“…To address these problems, researchers have proposed treatment measures, such as chemical stabilization or ferrous and nonferrous metal recovery (e.g., pyrometallurgical or hydrometallurgical processes). 9,10,[15][16][17][18][19] Furthermore, EAF dust is involved in the formation of hazardous Cl-compounds, such as polychlorinated dibenzodioxins, polychlorinated dibenzofurans, and hexachlorobenzene. 6) The formation these compounds can be decreased or pre-…”

Section: Introductionmentioning

confidence: 99%

Treatment of Hazardous Waste by Carbon Dioxide Capture from an Electric Arc Furnace

Leon

Cantú

Villarreal³

et al. 2015

ISIJ Int.

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The steel industry is important for the development of several economic activities in the world. Unfortunately, the electric arc furnace (EAF) used in production generates byproducts such as dust, which must be treated and confined to prevent pollution. In this study, the alkaline properties of solutions prepared with EAF dust were evaluated for use in CO2 capture. A process in which dust solution properties are regarded as an advantage is proposed. The results indicate that the developed process effectively minimizes operational problems. Specifically, the process neutralizes several hazardous pollutants contained in EAF dust, reduces CO2 emissions, and directly removes dioxin-forming dust from the exit gas stream.KEY WORDS: CO2 capture; steelmaking industry; electric arc furnace dust.

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