recycling practices of spent mgo c refractories journal
BEST PRACTICES IN REFRACTORY WASTE MANAGEMENT
the recycling of critical materials is even more important. Moreover the refractory waste management was a very underdeveloped market and Sidenor Basauri plant was a driving force in the development of refractory recycling. For the results achieved within this project and for being pioneers Sidenor was
Get PriceLiquidus- and Primary-Phase Determinations of Slags Used
In general the addition of Na2O to the slag decreased the liquidus at all MgO contents and CaO/SiO2 ratios. The addition of NaF to the CaO–SiO2–10 Fe2O3–20 Al2O3 system extended the liquid region at 1200 °C to higher CaO/SiO2 ratios. The effect was the greatest at CaO/SiO2 ratio of 0.6 and at low MgO contents of slag (2 ).
Get PriceEvaluation of recycled MgO-C bricks and dead-burned
The process of recycling spent refractories has been carried out in many steel plants as in the case of the MgO-C bricks from EAF s. This practice may be simple but it has generally been developed on empirical grounds.
Get PriceRecycling Practices of Spent MgO-C RefractoriesJournal
The recycling options of spent MgO-C refractories from an electrical arc furnace (EAF) have been evaluated. The economic quality of spent refractories and products made from it the ease of implementation of a recycling practice and the interest of steel melt shops were considered.
Get PriceHydration resistance and mechanism of regenerated
of spent MgOCaO bricks was normally in two ways one was used as MgOCaO clinker in MgOCaO refractory bricks but the highest utilization was only 25wt 11) another was to be made into MgOCaO dry vibration material for tundish working linings 13) which requested that the impurities content in the spent MgOCaO bricks was lower enough.
Get Price(PDF) Recycling MgO-C Refractory in the EAF of IMEXSA
Figure 3 .3MgO Figure 4 .4MgO saturation limits for a B 3 ratio of 2.0 and 1600°C Figure 5 .5Effect of flux addition practice on MgO in the slag Small scale trials 10 heats were analyzed in this set of heats the injection flowrate and amount of spent refractory was defined.
Get PriceAlert Recycling of Byproducts (July 2016)
Study of MgO-C spent refractory waste recycling from MgO for metallurgical applications. D. Gomes D. Fraga P. Mesquita J. dos Santos L. Neves R. Teixeira G Lima (in Portuguese). practice at OneSteel s Sydney and Melbourne EAFs since 2008. Thanks to Polymer Injection Technology as of February 2016 the equivalent of 2.45 million
Get PriceRecycling Practices of Spent Mgo-c Refractories
RECYCLING PRACTICES OF SPENT MgO-C REFRACTORIES Kyei-Sing Kwong and James P. Bennett Albany Research Center USDOE 1450 Queen Ave. SW. Albany OR 97321 USA Phone (541) . ABSTRACT The recycling options of spent MgO-C refractories from an electrical arc furnace (EAF) have been evaluated.
Get PriceA STUDY OF SLAG CORROSION OF OXIDES AND OXIDE
vi SUPPLEMENTS Supplement I "Studies on decarburization of MgO-C Refractories during Ladle preheating" I. Kasimagwa V. Brabie and P. G. Jönsson Accepted for publication in Steel GRIP Journal 2010 Supplement II "The use of thermodynamic computations to predict the phase transformation in MgO-C refractories during steel refining" I. Kasimagwa
Get PriceANALYSIS OF THE SLAG AND METAL INFLUENCE ON THE LIFE
hearth refractory lining wear level based on the statistical evaluation of plant data. Influence of specific slag (CaO MgO FeO Al 2O3 SiO 2 basicity) and metal (C Mn) constituents on the extent of EAF hearth lining wear was analysed at selected number of 24 campaigns. Average
Get PriceRecycling Practices of Spent Mgo-c Refractories
RECYCLING PRACTICES OF SPENT MgO-C REFRACTORIES Kyei-Sing Kwong and James P. Bennett Albany Research Center USDOE 1450 Queen Ave. SW. Albany OR 97321 USA Phone (541) . ABSTRACT The recycling options of spent MgO-C refractories from an electrical arc furnace (EAF) have been evaluated.
Get PriceRECYCLING AND UTILIZATION OF SOLID WASTE GENERATED IN
Mar 29 2017 · RECYCLING AND UTILIZATION OF SOLID WASTE GENERATED IN THE ROURKELA STEEL PLANT ODISHA . Pratap Kumar Swain Trinath Biswal Previn Kumar Kar and Rahas Bihari Panda. Department of Chemistry VSS University of Technology Burla India.
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Recycling process steps of spent catalysts. 2.1 Collection and classification of the converters from the scrap yards or car service workshops. This step is performed throughout Europe from numerous small-sized companies and natural entities.
Get PriceHydration resistance and mechanism of regenerated
of spent MgOCaO bricks was normally in two ways one was used as MgOCaO clinker in MgOCaO refractory bricks but the highest utilization was only 25wt 11) another was to be made into MgOCaO dry vibration material for tundish working linings 13) which requested that the impurities content in the spent MgOCaO bricks was lower enough.
Get PriceInnovative Methodology for Comprehensive Utilization of
Spent MgO-Cr2O3 bricks contain various heavy metals and are considered as a hazardous waste. In order to utilize the waste a novel process to recover the copper from the spent bricks by flotation was developed. The mineralogical characteristics of the bricks the mechanisms of metal penetration and the effects of grinding time emulsified kerosene dosage collectors and Na2S addition on the
Get PriceRecycling MgO-C Refractory in EAF of IMEXSA Steelmaking
2 recycling MgO (EAF 3) std practice (EAF 1 2 4) 10 15 20 25 30 35 40 45 50 55 FeO wt Figure 9. Isothermal stability diagram showing MgO levels employing spent refractory. 612. MgO sa tura. 10 15 20 25 30 35 40 45 50 55 FeO wt Figure 10. Isothermal stability diagram showing MgO levels in the conventional practice. AISTech 2005 Proceedings
Get PriceLiquidus- and Primary-Phase Determinations of Slags Used
In general the addition of Na2O to the slag decreased the liquidus at all MgO contents and CaO/SiO2 ratios. The addition of NaF to the CaO–SiO2–10 Fe2O3–20 Al2O3 system extended the liquid region at 1200 °C to higher CaO/SiO2 ratios. The effect was the greatest at CaO/SiO2 ratio of 0.6 and at low MgO contents of slag (2 ).
Get PriceRefractories Recycling refractoriesIMFORMED
Circle of refractory life Refractory recycling in simplified stages Source refractory waste from end user eg. alerted to break-out On-site assessment and price negotiation of spent refractories Extract spent refractories and transfer to processing plant Initial crushing of shapes to mm sizes Packed stored ready for sale to refractory
Get Price(PDF) Recycling MgO-C Refractory in the EAF of IMEXSA
Figure 3 .3MgO Figure 4 .4MgO saturation limits for a B 3 ratio of 2.0 and 1600°C Figure 5 .5Effect of flux addition practice on MgO in the slag Small scale trials 10 heats were analyzed in this set of heats the injection flowrate and amount of spent refractory was defined.
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Abstract In this experiment preparation of samples were based on original ratio of bauxite matrix Al 2 O 3-SiC-C castable for iron runner and partial bauxites of size 8-5 mm 5-3 mm 3-1 mm and 2 O 3-MgO-C materials from spent ladle bricks respectively.Effects of particle size and content of the recycled materials on sintering performance of the castable were investigated.
Get PriceRecycling of refractory bricks used in basic steelmaking
Jan 01 2019 · The practice of recycling spent MgO-C refractory in EAF has been tested and implemented at industrial sites and is today considered a recommended metallurgical practice (Conejo et al. 2006 Kwong and Bennett 2002 Lule et al. 2005). The use of spent refractories as slag conditioner has many benefits such as reduction or even complete
Get PriceANALYSIS OF THE SLAG AND METAL INFLUENCE ON THE LIFE
hearth refractory lining wear level based on the statistical evaluation of plant data. Influence of specific slag (CaO MgO FeO Al 2O3 SiO 2 basicity) and metal (C Mn) constituents on the extent of EAF hearth lining wear was analysed at selected number of 24 campaigns. Average
Get PriceGlass International March 2016 by Quartz
Mar 16 2016 · 85-99.8 MgO China. Fused nagnesia Refractory mineral summary table. attention given to recycling refractories by the leading refractory manufacturers and end users. spent refractories can
Get PriceRecycling practices of crushed MgO-C bricks and dolomite
Recycling practices of crushed MgO-C bricks and dolomite sinter fines used as a slag conditioning additive in the EAF T. C. Avelar1 A. F. Veiga1 E. Gueguen2 J. R. Oliveira3 1Technical Marketing Department Magnesita Refractories Germany 2R D Department Magnesita Refractories Germany 3Metalurgic and Materials Department Instituto Federal do Espírito Santo (IFES)
Get PriceCharacterization and recycling of spent refractory wastes
Approximately 7500 t of spent refractories are landfilled annually in Missouri. Research was initiated to reduce the amount landfilled by studying the types and quantities of spent refractories generated the conditions of the wastes and technologies for recycling and reusing spent refractories. This paper reviews the characterization results from three major spent refractory waste streams in
Get Priceاثر استفاده از هگزامتافسفات سدیم بر خواص فیزیکی و مکانیکی
Magnesia–carbon (MgO–C) refractories are widely used in basic oxygen furnaces electric arc furnaces and steel ladles. These refractories have excellent slag resistance and thermal shock resistance due to the good properties of carbon such as low wettability high thermal conductivity and
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