caustic soda leach of electric arc furnace dust


Alkaline leaching of iron and steelmaking dust CORE

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

Kinetics of zinc ferrite leaching in caustic DeepDyve

Kinetics of zinc ferrite leaching in caustic media in the deceleratory period Kinetics of zinc ferrite leaching in caustic media in the deceleratory period Xia D K Pickles C A 1999 06 01 00 00 00 In this research the role of zinc ferrite in the hydrometallurgical recovery of zinc in both primary zinc production and zinc containing waste treatment processes is discussed

Recently the iron and steel makers as well are much more concerned with the by products and waste streams generated in their ferrous metallurgical industries In general the relevant minor or trace elements Si Mn P Al S As Cu Zn K Na Ti Cr V W etc are not concentrated very much in the different slags and dust produced and collected during the subsequent processing steps of

Lead and zinc selective precipitation from leach electric

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 In the first step EAF dusts were hydrolyzed for 24 h with orbital stirring using a water dust weight ratio of 1 1

RECOVERY OF ZINC FROM FERRITE ELECTRIC FURNACE

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

RECYCLING OF AN ELECTRIC ARC FURNACE FLUE DUST

Recycling of an electric arc furnace flue dust to obtain high grade ZnO Oscar Ruiza b Carmen Clementeb Manuel Alonsoa Francisco Jose Alguacila aCentro Nacional de Investigaciones Metalúrgicas CSIC Avda

Study of Zinc Leaching of EAF Flue Dust Using Sodium

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 steel making plant the production of Electric Arc Furnace EAF dust is 1–2 of total steel

Alkaline leaching of zinc from electric arc furnace steel dust

Apr 01 2006 · Read Alkaline leaching of zinc from electric arc furnace steel dust Minerals Engineering on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips

Microwave caustic leaching of electric arc furnace dust

Microwave caustic leaching of electric arc furnace dust 87 Effect ofpower level on zinc recovery The experimental data for the effect of leaching time on the zinc recovery for various power levels is shown in Figure 4 The power is represented as a percentage of full power Also included is

Caustic roasting and leaching of electric arc furnace dust

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

Alkaline leaching of iron and steelmaking dust

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

GB1568362A Heavy metal recovery in ferrous metal

GB1568362A GB28448 75A GB2844875A GB1568362A GB 1568362 A GB1568362 A GB 1568362A GB 28448 75 A GB28448 75 A GB 28448 75A GB 2844875 A GB2844875 A GB 2844875A GB 1568362 A GB1568362 A GB 1568362A Authority GB United Kingdom Prior art keywords alkali metal metal hydroxide dust residue process according Prior art date 1976 10 05 Legal status The legal status is

Caustic Soda Leach Of Electric Arc Furnace Dust

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 znpb ores sodium hydroxide smithsonite znpb ores production of zn powder zhao and stanforth 2000 Read More

Leaching and cementation of heavy metals from electric arc

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 2005 08 01 00 00 00 Laboratory scale research has focused on the treatment of EAF steel making dusts by an alkaline caustic leach process combining both hydro and environmentally

Extraction of zinc from electric arc furnace dust by

Extraction of zinc from electric arc furnace dust by alkaline leaching followed by fusion of the leaching residue with caustic soda By Y Zhao and R Stanforth Topics Alkaline leaching Caustic soda

THE POTENTIAL USAGE OF STEELMAKING BY PRODUCTS

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 IMS Tetronics plasma is simple to operate capable of handling a wide range of dust of particle

Abstracting Zinc Flakes from Crude Zinc SpringerLink

Apr 19 2014 · Caustic extraction of zinc from electric arc furnace steel dust Department of Chemical and Materials Engineering National Kaohsiung University of Applied Sciences Kaohsiung Department of Chemical and Materials Engineering National Kaohsiung University of Applied Sciences Kaohsiung

FR2510141A1 Zinc recovery from electric steel making

Zinc contg 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 200 250 g l caustic soda soln to leach zinc oxide and the second stage employing a more concentrated 250 2000 g l caustic soda soln to leach zinc ferrite

Hydrometallurgical Treatment of EAF Dust by Direct

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

ALKALINE LEACHING OF ZINC FROM STAINLESS STEEL

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

PDF Caustic Soda Leach of Electric Arc Furnace Dust

Caustic Soda Leach of Electric Arc Furnace Dust caustic soda leach experiments were conducted with an EAF dust sample containing 23 Zn 5

Alkaline electro hydrometallurgical process for Zn

Jan 17 2008 · Alkaline electro hydrometallurgical process for Zn extraction from electric arc furnace dust includes a lixiviation stage of steelworks dust in soda solution followed by filtration in which the solid waste with high iron content is separated after washing Microwave Caustic Leaching of Electric Arc Furnace Dust Department of Materials

CIH Hazardous Trades Flashcards Quizlet

the principal intermediate in steel production is made from iron ore limestone and coke reacted in a blast furnace Pig iron is converted into cast iron or steel in either a basic oxygen furnace BOF an open hearth or an electric arc furnace

US3326783A Process for the production of electrolytic

US3326783A US303510A US30351063A US3326783A US 3326783 A US3326783 A US 3326783A US 303510 A US303510 A US 303510A US 30351063 A US30351063 A US 30351063A US 3326783 A US3326783 A US 3326783A Authority US United States Prior art keywords zinc solution dust temperature process Prior art date 1963 08 21 Legal status The legal status is an assumption and is

The Effectiveness of Zn Leaching from EAFD Using Caustic Soda

Jan 20 2018 · 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 8 3 8 2 and 12 55 for NaHCO 3 Na 2 CO 3 and NaOH respectively

Microwave caustic leaching of electric arc furnace dust

Download Citation on ResearchGate Microwave caustic leaching of electric arc furnace dust Electric arc furnace EAF dust is a waste product which is generated when steel scrap is

Hydrometallurgical Treatment of EAF Dust by SpringerLink

Abstract 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