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Jan 01, 2000· A Samsung 900 W (2.45 GHz) microwave oven was employed. The cylindrical leaching reactor was constructed of Teflon and had the following dimensions: 78 mm in outside diameter, 64 mm in inside diameter, and 64 mm in height. The Microwave caustic leaching of electric arc furnace dust 8.5 tightly fitting Teflon lid was 22 mm in thickness and had ...
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Aug 01, 2005· Alkaline leaching of a local electric arc furnace dust, with no prior metallurgical treatment, dissolved 85% Zn and 90% Pb under the optimum conditions of: 1/7 S/L ratio, 95 °C, 10 M NaOH, stirred at 600 rpm for 2 h. The leach residue contained about 2.2% Zn, 37% Fe, 0.39% Pb, 0.35% Al, 0.27% Cu, 0.055% Cd and 0.26% Cr.
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Recycling of an electric arc furnace flue dust to obtain high grade ZnO . Oscar Ruiza,b, Carmen Clementeb, Manuel Alonsoa, Francisco Jose Alguacila,* ... Extraction of zinc from zinc ferrites by fusion with caustic soda, Min. Eng. 13 (2000) 1417-1421. ... Alkaline leaching of zinc from electric arc furnace steel dust, Min. Eng, 19 (2006) 478 ...
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[4] J. Frenay., J. Hissel, S. Ferlay, Recovery of lead and zinc from electric steel-making furnace dusts by the Cebedeau process in Recycle and Secondary Recovery of Metals, TMS, 1985, 195-202. [5] H. Mordogan, T. Cicek, A. Isik, Caustic Soda Leach of Electric Arc Furnace Dust, Tr.J. of Engineering and Environmental Science, 23 (1999), 199-207.
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2.2 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 [8] and Lenz et al. [13].
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Jul 01, 1999· 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.
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The invention concerns a method of treating electric arc furnace (EAF) dust. In the method the dust is preheated and decontaminated under conditions which oxidize the magnetite content of the dust to hematite. Thereafter the preheated and decontaminated dust is introduced into a fluidized bed reactor in which hematite is reduced, by means of a hot reducing gas generated by reforming natural ...
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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, NaHCO3, and Na2CO3 were used as leaching agents. The pH values for the prepared solutions were 8.3, 8.2, and 12.55 for NaHCO3, Na2CO3, and NaOH, respectively.
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E592 - 20 Guide to Obtainable ASTM Equivalent Penetrameter Sensitivity for Film Radiography of Steel Plates 14 to 2 in. (6 to 51 mm) Thick with X-Rays and 1 to 6 in. (25 to 152 mm) Thick with Cobalt-60. E594 - 96 (2019) Practice for Testing Flame Ionization Detectors Used in Gas or Supercritical Fluid Chromatography.
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Disposal and treatment of electric arc furnace dust... 29/07/1996 - 31/07/1996: 41: Spekularit Cevherinin HGMS ile Zenginleştirilmesi... 01/05/1996 - 02/05/1996: 42: İnce ve Çok İnce Öğütme... 01/01/1996 - 01/01/1996
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The nature of the zinc presence seems to be World of Metallurgy – ERZMETALL 57 (2004) No. 2 113 f Tomas Havlik et al.: Pressure Leaching of EAF Dust with Sulphuric Acid the basic indicator for an effective method of the EAF ing in the oxidation of FeCl2 to FeCl3, which hydrolyses dust treatment. ZnO in principle is the form easily worka ...
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An ammonium leaching of electric arc furnace dust (EAFD) was described in this paper. Ural steelmaking plants obtain EAFD of the following chemical composition, %: 23 Zn; 26 Fe; 10 Cl; 2,5 Ca; 2 Mg; 1,2 Pb; 1 Na. The most complete zinc extraction can be achieved with two-stages treatment by calcination of dusts [1], followed by leaching. The effect of calcination temperature (500-1000 °C ...
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Zinc recovery from electric-arc furnace dust by hydrochloric leaching and bi-electrolyte electrolysis - Read online for free. O Scribd é o maior site social de leitura …
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Leclerc N., Meux E., Lecuire J.-M.: Hydrometallurgical recovery of zinc and lead from electric arc furnace dust using mononitriloacetate anion and hexahydrated ferric chloride, Journal of Hazardous Materials, B91, 2002, s. 257
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Jan 31, 2016· Caustic soda leach of electric arc furnace dust Mordogan, H.; Isik, A. The recovery of zinc from the leach liquors of the CENIM-LENTI process by solvent extraction with di(-2 …
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They leached arc furnace steel dust with sodium hydroxide while varying the temperature and the sodium hydroxide concentration. These two parameters were 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
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that the caustic soda leach-electrolysis 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 …
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Jurnal Tekno logi, bil. 27, Dis. 1997 him. 15-22 ©Universiti Teknologi Malaysia THE POTENTIAL USAGE OF STEELMAKING BY-PRODUCTS: ELECTRIC ARC FURNACE DUST JAMALIAH IDRlS AND TEE KIM SIONG* Fakulti Kejuruteraan Mekanikal Universiti Teknologi Malaysia Department of Materials Science and Metallurgy Universi ti Cambridge, UK Abstract.
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Dec 30, 2000· The EAF dust tested contained 25% Zn, 1.8% Pb and 33% Fe. It was found that 38% of zinc and 68% of lead could be extracted from the dust when leached directly in caustic soda solution. Leaching of zinc increased to 80% when dust was directly fused with caustic soda followed by alkaline leaching.
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The dusts are very fine (usually < 0.01 mm) and have tendency to agglomerate. Metal extraction from the dusts is difficult due to their complex composition and finding asuitable process is complicated as each dust is unique. The advantage of caustic soda leachingis its selectiveness in leaching zinc compared to iron compounds.
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Jul 18, 2013· (1999). Caustic Roasting and Leaching of Electric Arc Furnace Dust. Canadian Metallurgical Quarterly: Vol. 38, No. 3, pp. 175-186.
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The increasing use of zinc-containing scrap for steel production has lead to a high zinc content in the electric arc furnace and converter flue dusts. The cost of disposing of this residue is high due to environmental restrictions. Various recycling processes have been developed for these dusts, but most never reached the pilot plant stage and many investigations were stopped because of ...
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Jul 18, 2013· 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.
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Dec 31, 2016· Caustic soda leach of electric arc furnace dust. Turkish J Eng Environ Sci 1999; 23(3): 199-207. [32] Jezierski J, Janerka K. Selected aspects of metallurgical and foundry furnace dust …
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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.
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DOI: 10.3390/MET8070547 Corpus ID: 139474502. Zinc Recovery from Steelmaking Dust by Hydrometallurgical Methods @inproceedings{Palimka2018ZincRF, title={Zinc Recovery from Steelmaking Dust by Hydrometallurgical Methods}, author={P. Palimąka and S. Pietrzyk and M. Stępień and Katarzyna Cie{'c}ko and I. Nejman}, year={2018} }
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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 …
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Apr 01, 2016· Orhan, G.: Leaching and cementation of heavy metals from electric arc furnace dust in alkaline medium. Hydrometallurgy 78, 236–245 (2005) Article Google Scholar 13. Cruells, M., Roca, A., Nunez, C.: Electric arc furnace flue dusts: characterization and leaching with sulphuric acid. Hydrometallurgy 31, 213–231 (1992)
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EP1878806A2 EP20060124793 EP06124793A EP1878806A2 EP 1878806 A2 EP1878806 A2 EP 1878806A2 EP 20060124793 EP20060124793 EP 20060124793 EP 06124793 A EP06124793 A EP ...
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Simulation programs have been devel oped to study the effect of recycling the electric arc furnace dust leaching residues to the furnace. Residues from sulfuric acid and sodium hydroxide leaching have been tested. Results enable the furnace-leaching response to be defined in accord with the recycling rate and conditions for zero stabilization to be determined.
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Based on the unique properties of caustic soda (Le. low melting point), the research involved a low temperature caustic roasting process for both the synthetic zinc femte and the zinc femte in the EAF dust followed by dilute caustic leaching of the roasted …
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Apr 01, 2016· The present paper presents a part of the research efforts of the laboratory of Metallurgy, National Technical University of Athens, Greece, aiming at developing a purely hydrometallurgical method, able to treat the zincferous dust, generated during the production of steel from scraps in Electric Arc Furnace (EAF), efficiently and economically and especially so for annual capacities lower than ...
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Jan 20, 2018· 10%· 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, NaHCO3, and Na2CO3 were used as leaching agents. The pH values for the prepared solutions were 8.3, 8.2, and 12.55 for NaHCO3, Na2CO3, and NaOH, respectively.
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