subjected to, (1) conventional agitation leach, (2) pressure leach, (3) electric arc furnace dust pretreatment in microwave oven, and (4) leaching with ultra sonic agitation. Based on the information gathered, they concluded that the conventional agitated leaching method was the most effective since it displayed the highest zinc recovery of 74%.
Jan 01, 2000· Microwave caustic leaching of electric arc furnace dust Microwave caustic leaching of electric arc furnace dust Xia, ; Picklesi, 20000101 00:00:00 Electric arc furnace (EAF) dust is a waste product which is generated when steel scrap is melted in an electric arc furnace. It contains high concentrations of iron, zinc and lead.
Therefore, the recycling of Turkish EAF dust could contribute greatly to the economy. In this study, caustic soda leach experiments were conducted with an EAF dust sample containing 23 % Zn, 5 % Pb and 30 % Fe obtained from by a plant located in Aliaga/_Izmir. Optimum leach …
Alkaline leaching of zinc from electric arc furnace steel dust Dutra *, Paiva, Tavares Department of Metallurgical and Materials Engineering, Federal University of Rio de Janeiro, COPPE/UFRJ, Box 68505, Rio de Janeiro, RJ, Brazil Received 28 June 2005; accepted 24 August 2005 Available online 14 October 2005
AbstractElectric arc furnace (EAF) dust is produced when iron and steel scrap is remelted in an electric arc furnace. There are still significant problems associated with the pyrometallurgical and/or hydrometallurgical processes for the treatment of this dust. In the present research, the dust was roasted with caustic soda at low temperatures.
Preparation of Alkaline Solution from EAF Dust Treatment. EAF dust samples were treated using an integrated process that combines three steps: EAF dust hydrolysis, fusion with caustic soda and then leaching, as described by Youcai and Stanforth  and Lenz et al. .
Caustic soda leach of electric arc furnace dust Sodium hydroxide Electric arc furnace The extraction of zinc and lead from electric arc furnace dust Mordodan et al. 1999 Production of Zn powder by alkaline treatment of smithsonite Zn–Pb ores Sodium hydroxide Smithsonite Zn–Pb ores Production of Zn powder Zhao and Stanforth, 2000
THERMAL TREATMENT OF STAINLESS STEEL DUSTS FOR LEACHING Jari Aromaa1)*, Istvan Galfi1), ... with 80 to 85 % of the electric arc furnace (EAF) dust in the US and up to 76 % worldwide treated in Waelz kilns . ... 33 % Fe) were leached in caustic soda solution and using caustic roasting pre – treatments the amount of extracted zinc increased ...
Jan 20, 2018· Abstract. Electric arc furnace dust (EAFD) is a toxic waste which is mainly rich in iron oxide, zinc, and lead. Hydrometallurgical extraction of zinc from Jordanian EAFD in alkaline medium was investigated; NaOH, NaHCO 3, and Na 2 CO 3 were used as leaching agents. The pH values for the prepared solutions were , , and for NaHCO 3, Na 2 CO 3, and NaOH, respectively.
that the caustic soda leachelectrolysis process may be technically applicable to Turkish EAF dust. Key Words: Zinc, dust, leach, electric arc furnace Elektrik Ark Oca g Tozlar n n Kostik Soda Li˘ci Ozet¨ T¨urkiye’deki elektrik ark ocakl ˘celik fabrikalar ndan ¨uretim …
Journal of Hazardous Materials 141 (2007) 33–36 Recycling of an electric arc furnace flue dust to obtain high grade ZnO Oscar Ruiz a,b , Carmen Clemente b , Manuel Alonso a , Francisco Jose Alguacil a,∗ a Centro Nacional de Investigaciones Metal´urgicas (CSIC), Avda.
RECOVERY OF ZINC FROM ZINC FERRITE AND ELECTRIC ARC FURNACE DUST ... By adding caustic soda with EM dust, the zinc ferrite was decomposed and formed a ... EAF dust followed by dilute caustic leaching of the roasted residues. This process wiil be discussed in Chapter Five.
In the caustic soda leach process, lead and zinc are selectively dissolved in sodium hydroxide solution rejecting nonamphoterics in the residue. The process has been attempted for the dissolution of zinc from different sources such as iron and steel making dusts [37,38], electric arc furnace dust , smithsonite Zn–Pb
Abstract: The response of different metals such as Zn, Fe, Pb, Cr and Mn during leaching of Electric Arc Furnace (EAF) dust in acid medium has been investigated. The major proportion of EAF dust constitutes of these metals and their recovery by means of a chemical process is not only economical but also imparts positive impact on the environment.
SCIENCE: Leaching properties of electric arc furnace dust prior/following alkaline extraction Article in Journal of Environmental Science and Health Part A (2007) 42, 323329 by Visnja Orescanin, Ruder Boskovic and others, Institute, Laboratory for Radioecology, Bijenicka cesta, Zagreb, Croatia.
before and after leaching. The optimum alkali concentration for selective leaching of zinc was found to be 4 M with a zinc recovery of 90 %. Keywords: EAF dust, Leaching, Sustainable environment, Zinc recovery.Introduction In steelmaking plant, the production of Electric Arc Furnace (EAF) dust is 1–2 % of total steel
Alkaline leaching of iron and steelmaking dust ... (BOF), and electric arc furnaces (EAF). These dusts contain toxicelements, such as heavy metals, and are thus classified as harmful waste making the disposalof them expensive. ... can be used prior to leaching. By roasting with caustic soda priorto alkaline leaching zinc ferrites can be ...
Processing Heap Leachable Gold Ore by Cyanidation Oxide ore (low grades) will be unloaded on the heap leach PAD. Lime must be added during the discharge in order to control pH. Harvesting must be performed after the ore discharge is completed in order to avoid compaction caused by the trucks during the leach cell construction. After the leach cell is harvested, the irrigation system shall be ...
Zinccontg. dust, from electric steel making furnaces, is leached with caustic soda to extract the zinc, pref. in two stages, the first stage employing a relatively weak (pref. 200250 g/l) caustic soda soln. to leach zinc oxide and the second stage employing a more concentrated (2502000 g/l) caustic soda soln. to leach zinc ferrite.
Aug 01, 2005· Leaching and cementation of heavy metals from electric arc furnace dust in alkaline medium Leaching and cementation of heavy metals from electric arc furnace dust in alkaline medium Orhan, Gökhan 20050801 00:00:00 Laboratoryscale research has focused on the treatment of EAF steel making dusts by an alkaline caustic leach process, combining both hydro and environmentally …
Rabah and ElSayed, 1995 stressed the importance of particle size for metal recovery from dry cell battery, zinc dross and zinc ash using pyrometallurgical and hydrometallurgical processes. Barrera, 1992 treated electric arc furnace dust (EAFD) for the recovery of …
Electric arc furnace (EAF) dust is produced when iron and steel scrap is remelted in an electric arc furnace. There are still significant problems associated with the pyrometallurgical and/or hydrometallurgical processes for the treatment of this dust. In the present research, the dust was roasted with caustic soda at low temperatures.
dust back into furnaces. In this paper two different stainless steel electric arc furnace dusts (EAF1 and EAF2) from Outokumpu Stainless (Tornio, Finland), were leached using NaOH solutions. The purpose was to selectively leach out zinc from the dusts and to find factors that affected most dissolution of zinc.
Recycl. 10 (1994) possibilities of various processes for treatment of iron and steelwork 35–41. residual and waste materials, Report of Luxembourg Commission of the  M. Mordogan, T. Cicek, A. Isik, Caustic soda leach of electric arc European Communities, 1990. furnace dust, Trans. Eng. Environ.
the operation of electric arc furnace, especially dust rich in metallic oxides, are of growing world ... Among the hydrometallurgical processes, caustic soda leaching appears to be the most promising because it dissolves practically no iron. IMSTetronics plasma is simple to operate, capable of handling a wide range of dust of particle ...
processes, such as roasting, can be used prior to leaching. By roasting with caustic soda prior to alkaline leaching zinc ferrites can be decomposed and leaching of zinc could be improved. Keywords BF dust, BOF dust, EAF dust, NaOH leaching, zinc recovery ISBN (printed) 9789526044620 ISBN (pdf) 9789526044637
Wastes Released from Blast Furnace Operation; Blast Furnace waste dust; Zinc rich steel industry waste. Technology and Patent. Caustic Soda Leach of Electric Arc Furnace Dust; Pressure Leaching of EAF Dust with Sulphuric Acid; Separation of Zinc from EAF Dust; Zinc and iron removal by chlorination roasting. Stabilization of EAF Dust
Keywords: EAF dust, Leaching, Sustainable environment, Zinc recovery. Introduction In steelmaking plant, the production of Electric Arc Furnace (EAF) dust is 12 % of total steel obtained that contains a considerable amount of hazardous metallic wastes .