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Mostaghel, Sina
Publications (10 of 18) Show all publications
Mostaghel, S., Samuelsson, C. & Candy, I. (2013). Challenges with increased alumina concentration in the zinc-copper smelting slags (ed.). In: (Ed.), (Ed.), COM 2013 hosted by MS&T13: Ralph LLoyd Harris Memorial Symposium. Paper presented at Conference of Metallurgists : 27/10/2013 - 31/10/2013 (pp. 457-467). : MetSoc
Open this publication in new window or tab >>Challenges with increased alumina concentration in the zinc-copper smelting slags
2013 (English)In: COM 2013 hosted by MS&T13: Ralph LLoyd Harris Memorial Symposium, MetSoc , 2013, p. 457-467Conference paper, Published paper (Refereed)
Abstract [en]

End of life (EOL) electronics is known to be a valuable resource of base and precious metals, and its application as a secondary raw material in pyrometallurgical processes is steadily increasing. These types of materials inevitably introduce various impurities to the smelting furnaces, which may change the physical and chemical properties of the products and by-products of the operation. Alumina is one of the most common and significant oxide components associated with EOL electronics; therefore, its influences on different properties of the iron-silicate or fayalite-type slags are of particular interest to the non-ferrous metal producers. The current article summarizes the effects of an increased alumina concentration on slag thermo-physical properties (density, surface tension, viscosity, etc.). Operational difficulties, e.g. copper loss to the slag phase and foaming of the melt, resulting from such a change in slag composition are also discussed.

Place, publisher, year, edition, pages
MetSoc, 2013
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-29577 (URN)315e81a4-1163-4471-a6f5-15de036684c7 (Local ID)315e81a4-1163-4471-a6f5-15de036684c7 (Archive number)315e81a4-1163-4471-a6f5-15de036684c7 (OAI)
Conference
Conference of Metallurgists : 27/10/2013 - 31/10/2013
Note
Godkänd; 2013; 20131125 (sinmos)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-01-19Bibliographically approved
Mostaghel, S., Samuelsson, C. & Björkman, B. (2013). Influence of alumina on mineralogy and environmental properties of zinc-copper smelting slags (ed.). Paper presented at . International Journal of Minerals, Metallurgy and Materials, 20(3), 234-245
Open this publication in new window or tab >>Influence of alumina on mineralogy and environmental properties of zinc-copper smelting slags
2013 (English)In: International Journal of Minerals, Metallurgy and Materials, ISSN 1674-4799, E-ISSN 1869-103X, Vol. 20, no 3, p. 234-245Article in journal (Refereed) Published
Abstract [en]

An iron-silicate slag, from a zinc-copper smelting process, and mixtures of this slag with 5, 10 and 15 wt-% alumina addition were re-melted, semi-rapidly solidified and characterized using scanning electron microscopy equipped with energy dispersive spectroscopy, and X-ray diffraction. The FactSageTM6.2 thermodynamic package was applied to compare the stable phases at equilibrium conditions with experimental characterization. A standard European leaching test was also carried out for all samples to investigate the changes in leaching behaviour due to addition of alumina. Results show that the commonly reported phases for slags from copper and zinc production processes (olivine, pyroxene and spinel) are the major constituents of the current samples. A correlation can be seen between mineralogical characteristics and leaching behaviours. The sample with 10 wt-% alumina addition, which contains high amounts of spinels and lower amounts of the other soluble phases, shows the lowest leachabilities for most of the elements.

National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-11310 (URN)10.1007/s12613-013-0718-3 (DOI)000315945400003 ()2-s2.0-84877818533 (Scopus ID)a406c9c8-4d1f-4843-a258-0728511ae55b (Local ID)a406c9c8-4d1f-4843-a258-0728511ae55b (Archive number)a406c9c8-4d1f-4843-a258-0728511ae55b (OAI)
Note
Validerad; 2013; 20120312 (sinmos)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Mostaghel, S., Matsushita, T., Samuelsson, C., Björkman, B. & Seetharaman, S. (2013). Influence of alumina on physical properties of an industrial zinc-copper smelting slag: Part 1: Viscosity (ed.). Paper presented at . Transactions of the Institution of Mining and Metallurgy Section C - Mineral Processing and Extractive Metallurgy, 122(1), 42-48
Open this publication in new window or tab >>Influence of alumina on physical properties of an industrial zinc-copper smelting slag: Part 1: Viscosity
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2013 (English)In: Transactions of the Institution of Mining and Metallurgy Section C - Mineral Processing and Extractive Metallurgy, ISSN 0371-9553, E-ISSN 1743-2855, Vol. 122, no 1, p. 42-48Article in journal (Refereed) Published
Abstract [en]

The rotating cylinder method was applied to measure the viscosities of an industrial iron silicate slag and mixtures of this slag with 5, 10 and 15 wt-% alumina addition, in temperature range 1100–1300°C. The measured viscosities were compared with the predicted values using two of the commercially available software products for viscosity calculations, namely Thermoslag®1.5 and FactSageTM6.2. As the models can only predict viscosities for a solid free melt, obtained values by FactSageTM6.2 were modified using the Einstein–Roscoe equation. Results show that aluminium behaves as a network former cation in this type of slag, and by increasing the alumina concentration, the melt becomes progressively polymerised. Consequently, the viscosity of the slag increases at a given temperature, which is supported by thermodynamic predictions. According to the modified FactSageTM6.2 calculations, the viscosity of the solid containing slag increases from 2.1 to 5.5 poise at the industrial operating temperature (∼1250°C).

National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-15358 (URN)10.1179/1743285512Y.0000000029 (DOI)2-s2.0-84877140734 (Scopus ID)edbbe333-31ec-4f41-98e5-717b7e77f442 (Local ID)edbbe333-31ec-4f41-98e5-717b7e77f442 (Archive number)edbbe333-31ec-4f41-98e5-717b7e77f442 (OAI)
Note
Validerad; 2013; 20120312 (sinmos)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Mostaghel, S., Matsushita, T., Samuelsson, C., Björkman, B. & Seetharaman, S. (2013). Influence of alumina on physical properties of an industrial zinc-copper smelting slag: Part 2: Apparent density, surface tension and effective thermal diffusivity (ed.). Paper presented at . Transactions of the Institution of Mining and Metallurgy Section C - Mineral Processing and Extractive Metallurgy, 122(1), 49-55
Open this publication in new window or tab >>Influence of alumina on physical properties of an industrial zinc-copper smelting slag: Part 2: Apparent density, surface tension and effective thermal diffusivity
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2013 (English)In: Transactions of the Institution of Mining and Metallurgy Section C - Mineral Processing and Extractive Metallurgy, ISSN 0371-9553, E-ISSN 1743-2855, Vol. 122, no 1, p. 49-55Article in journal (Refereed) Published
Abstract [en]

Apparent density, surface tension and effective thermal diffusivity of an industrial iron–silicate based slag and mixtures of this slag with 5, 10 and 15 wt-% alumina addition were measured using the sessile drop and the laser flash techniques respectively. A comparison is made between corresponding values obtained from the commonly applied models and the experimental measurements. Results show that increasing the alumina concentration in slag increases the degree of polymerisation of the melt and, consequently, its effective thermal diffusivity. By alumina addition to the system, the surface tension increases progressively from 338 mN m−1, in the reference slag sample, to 488 mN m−1, in the mixture of slag and 15 wt-% alumina addition. The apparent density of the liquid–solid containing slag is continuously decreased due to the increased alumina concentration. However, the effect is more pronounced between 8 and 12 wt-% total alumina content in the slag.

National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-8355 (URN)10.1179/1743285512Y.0000000015 (DOI)2-s2.0-84877118783 (Scopus ID)6dc5ef13-d790-4c37-b274-8bf349a50de5 (Local ID)6dc5ef13-d790-4c37-b274-8bf349a50de5 (Archive number)6dc5ef13-d790-4c37-b274-8bf349a50de5 (OAI)
Note
Validerad; 2013; 20120312 (sinmos)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Mostaghel, S., Matsushita, T., Samuelsson, C., Björkman, B. & Seetharaman, S. (2013). Influence of alumina on physical properties of an industrial zinc-copper smelting slag: Part 3: Melting behaviour (ed.). Paper presented at . Transactions of the Institution of Mining and Metallurgy Section C - Mineral Processing and Extractive Metallurgy, 122(1), 56-62
Open this publication in new window or tab >>Influence of alumina on physical properties of an industrial zinc-copper smelting slag: Part 3: Melting behaviour
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2013 (English)In: Transactions of the Institution of Mining and Metallurgy Section C - Mineral Processing and Extractive Metallurgy, ISSN 0371-9553, E-ISSN 1743-2855, Vol. 122, no 1, p. 56-62Article in journal (Refereed) Published
Abstract [en]

A combination of different experimental techniques and thermodynamic calculations has been used to investigate the melting behaviour of an industrial iron silicate slag and mixtures of this slag with 5, 10 and 15 wt-% alumina addition. Differential scanning calorimetry (DSC) and thermooptical observation were applied to monitor the solidus temperature and softening behaviour of the samples respectively. Estimation of the liquidus temperature was made using the second derivative of activation energies for viscous flow, with respect to temperature. All experimentally detected values were compared to predictions made using the FactSageTM6.2 thermodynamic package. Results show that as the slag lies in the fayalite primary phase field, the liquidus temperature decreases due to the increased alumina concentration. In the hercynite primary crystallisation phase field, however, alumina addition to the system increases the liquidus temperature. The solidus temperature does not vary significantly due to the current changes in the total alumina content of the slag.

National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-3010 (URN)10.1179/1743285512Y.0000000028 (DOI)2-s2.0-84877114178 (Scopus ID)0c2046bb-b453-4b0d-b825-2b87841f43ca (Local ID)0c2046bb-b453-4b0d-b825-2b87841f43ca (Archive number)0c2046bb-b453-4b0d-b825-2b87841f43ca (OAI)
Note
Validerad; 2013; 20120312 (sinmos)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Mostaghel, S. (2012). Influence of alumina on the zinc slag fuming processes: an experimental study on physical properties and leaching behaviour of the generated fayalite-type slag (ed.). (Doctoral dissertation). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Influence of alumina on the zinc slag fuming processes: an experimental study on physical properties and leaching behaviour of the generated fayalite-type slag
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Recycling of secondary raw materials by non-ferrous metal producers is steadily increasing. These materials inevitably introduce various impurities to the production furnaces, which can change the chemical composition, and thereafter, the physical and chemical properties of the products and by-products of the operation. Alumina is one of the most common and significant impurities that enter the furnaces in different ways, including recycling of waste electrical and electronic equipment (WEEE). In order to control and optimize the outcome of the process, a deep understanding of influences of alumina on slag properties is an essence. In the current work, a combination of different experimental techniques and thermodynamic calculations was carried out to investigate the effects of alumina on some of the most important properties of an industrial iron-silicate or fayalite-type slag, from a Swedish base and precious metals producer. For this purpose, a reference slag sample, devoid of alumina addition, and three different mixtures of slag with 5, 10, and 15 wt-% alumina additions were prepared and used for evaluation of density, surface tension, thermal diffusivity, viscosity, melting behaviour, mineralogy and leaching characteristics. Results show that in this type of slag, aluminium can be tetrahedrally coordinated and behave as a network former cation. As a result, increasing the alumina concentration leads to polymerization of the melt, and consequently, an increase in viscosity and thermal diffusivity. It is observed that alumina addition to the slag leads to formation of units with relatively higher molar volumes, which reduces the measured density of the material. Slag samples with higher alumina contents exhibit higher surface tensions, primarily due to the relative lower concentration of the surface-active components. By 5 wt-% alumina addition to the system, the liquidus temperature decreases slightly. Further increase in alumina content (10 and 15 wt-% alumina additions) causes a change in primary crystallization phase field of the material from fayalite (Fe2SiO4) to hercynite (FeAl2O4). This change is associated with a rise in liquidus temperature; however, the solidus temperature of the slag remains almost constant. The most important industrial characteristics of the slag (copper loss to the slag phase and foaming behaviour of the material) are definitely affected by such changes in slag composition and physical properties. Influence of alumina on these two phenomena were not investigated experimentally in the current work, but discussed, theoretically, based on the available literature. Mineralogical studies of the semi-rapidly solidified samples reveal that alumina addition to this type of slag changes the composition and concentration of major phases that are present in the material, which directly controls the leachability of different elements from the slag. It was found that in the current system, spinel and anorthite are the most leaching resistant phases, which are followed by olivine, clinopyroxene and orthopyroxene, respectively. Therefore, among the investigated samples in this study, the mixture of slag with 10 wt-% alumina addition shows the lowest leachability of most of the elements. As expected, by changing the cooling condition of the samples (i.e. water granulation), a totally different dissolution rate of the elements was observed. It is shown that leaching of the generated amorphous structures is a complex phenomenon that is controlled by other mechanisms than that of the semi-rapidly cooled samples.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2012. p. 160
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Keywords
Physical properties, Thermodynamic calculations, environmental properties, Sustainable extraction, Zinc fuming, Copper, Chemical engineering - Metallurgical process and manufacturing engineering, Kemiteknik - Metallurgisk process- och produktionsteknik
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-25997 (URN)c111a5a6-b835-46bd-b29a-0ad6566dfecd (Local ID)978-91-7439-492-4 (ISBN)c111a5a6-b835-46bd-b29a-0ad6566dfecd (Archive number)c111a5a6-b835-46bd-b29a-0ad6566dfecd (OAI)
Note
Godkänd; 2012; 20120925 (sinmos); DISPUTATION Ämne: Processmetallurgi/Process Metallurgy Opponent: Professor Heikki Kusti Jaikanen, Department of Materials Science and Engineering, Aalto University, Finland Ordförande: Associate Professor Caisa Samuelsson, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology Tid: Torsdag den 22 november 2012, kl 10.00 Plats: F341, Luleå tekniska universitetAvailable from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-24Bibliographically approved
Mostaghel, S., Holmgren, H., Matsushita, T. & Samuelsson, C. (2012). Integrated recycling at Boliden's Rönnskär smelter: formation of slag products (ed.). In: (Ed.), Jerome Downey; Thomas P. Battle; Jesse F. White (Ed.), International Smelting Technology Symposium: Incorporating the 6th Advances in Sulfide Smelting Symposium. Paper presented at TMS 2012 Annual Meeting and Exhibition : International Smelting Technology Symposium (Incorporating the 6th Advances in Sulfide Smelting Symposium) 11/03/2012 - 15/03/2012 (pp. 117-124). : Wiley-TMS
Open this publication in new window or tab >>Integrated recycling at Boliden's Rönnskär smelter: formation of slag products
2012 (English)In: International Smelting Technology Symposium: Incorporating the 6th Advances in Sulfide Smelting Symposium / [ed] Jerome Downey; Thomas P. Battle; Jesse F. White, Wiley-TMS , 2012, p. 117-124Conference paper, Published paper (Refereed)
Abstract [en]

Rönnskär Smelter of Boliden Mineral AB, Sweden, is a large end-processor of secondary raw materials and waste, including electronic scrap. E-scrap may introduce various impurities to the smelter’s flow-sheet, among which Al2O3 is a common and significant one. Current article summarizes the results of an ongoing research at Luleå University of Technology, Sweden, to study the influences of alumina on different properties of slag from the zinc fuming process at Rönnskär smelter. A combination of different experimental techniques and thermodynamic calculations has been used to investigate properties such as density, surface tension, effective thermal diffusivity, viscosity, melting and leaching behaviors. Results show that addition of alumina to this slag increases the degree of polymerization of the melt, and the properties vary correspondingly. Mineralogy of the semi-rapidly solidified samples is also changed due to alumina addition. A correlation between mineralogy and leaching behavior can be observed.

Place, publisher, year, edition, pages
Wiley-TMS, 2012
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-38400 (URN)cc9e4c4a-09ed-49ac-bad5-cc72bb4d1167 (Local ID)9781118291160 (ISBN)cc9e4c4a-09ed-49ac-bad5-cc72bb4d1167 (Archive number)cc9e4c4a-09ed-49ac-bad5-cc72bb4d1167 (OAI)
Conference
TMS 2012 Annual Meeting and Exhibition : International Smelting Technology Symposium (Incorporating the 6th Advances in Sulfide Smelting Symposium) 11/03/2012 - 15/03/2012
Note
Godkänd; 2012; 20120224 (sinmos)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-01-19Bibliographically approved
Mostaghel, S., Engström, F., Yang, Q., Samuelsson, C. & Björkman, B. (2012). The effects of cooling rate on leaching behavior of some ferrous and non-ferrous slag systems (ed.). In: (Ed.), (Ed.), Model Concept and Experiments: 9th International Conference on Molten Slags, Fluxes and Salts, Bejing 27-30 May 2012. Paper presented at International Conference on Molten Slags, Fluxes and Salts : 27/05/2012 - 30/05/2012.
Open this publication in new window or tab >>The effects of cooling rate on leaching behavior of some ferrous and non-ferrous slag systems
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2012 (English)In: Model Concept and Experiments: 9th International Conference on Molten Slags, Fluxes and Salts, Bejing 27-30 May 2012, 2012Conference paper, Published paper (Refereed)
Abstract [en]

It has been proven that pyrometallurgical slags can be given favorable physico-mechanical characteristics which make them suitable for use in civil engineering applications providing fulfillment of various technical and environmental criteria, of which slag leaching behavior is one of the main concerns. Numerous investigations have been carried out over the last several decades to clarify the influence of cooling rate on microstructure and properties of the slag systems; however, there is controversy in the literature as to the effect of rapid cooling, e.g. water granulation, on release of potentially toxic elements. In the current work, a ladle slag, a basic oxygen furnace (BOF) slag, two different electric arc furnace (EAF) slags, from low-alloyed and high-alloyed steel production, and three different “fayalite-type” slags, from zinc-copper smelting processes with different Fe/SiO2 ratios, are investigated. Semi-rapidly solidified (in crucible system) and water granulated samples for each composition were prepared. The solidified materials were characterized using commonly applied characterization techniques. The experimental work is compared with thermodynamic calculations using the FactSageTM thermodynamic package. Standard European leaching tests were carried out for all samples to investigate the slag leaching behaviors. Results show that rapid solidification and generated amorphous structure do not necessarily immobilize environmentally concerned elements in the glassy network. Instead, due to several factors, a higher reactivity is observed and trace elements dissolve more readily in the aqueous solution. The main reasons behind such a behavior including higher contents of metastable phases, different surface structures, oxidation and increased amount of grain boundaries are thoroughly discussed.

National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-34725 (URN)901400db-b969-40f0-987a-f52e2f9e225f (Local ID)901400db-b969-40f0-987a-f52e2f9e225f (Archive number)901400db-b969-40f0-987a-f52e2f9e225f (OAI)
Conference
International Conference on Molten Slags, Fluxes and Salts : 27/05/2012 - 30/05/2012
Note
Godkänd; 2012; 20120224 (sinmos)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-01-19Bibliographically approved
Mostaghel, S., Samuelsson, C. & Björkman, B. (2011). Influence of alumina on iron-silicate slag properties (ed.). In: (Ed.), (Ed.), Proceedings of European Metallurgical Conference EMC 2011: Copper, General Pyrometallurgy/ Vessel Integrity/ Process Gas Treatment. Paper presented at European Metallurgical Conference : 26/06/2011 - 29/06/2011 (pp. 291-305). Germany: GDMB, 1
Open this publication in new window or tab >>Influence of alumina on iron-silicate slag properties
2011 (English)In: Proceedings of European Metallurgical Conference EMC 2011: Copper, General Pyrometallurgy/ Vessel Integrity/ Process Gas Treatment, Germany: GDMB , 2011, Vol. 1, p. 291-305Conference paper, Published paper (Refereed)
Abstract [en]

Application of electronic scraps as secondary raw materials in non-ferrous metal extraction intro-duces various impurities to the production furnaces. This may change the chemical composition, and thereafter, the physical and chemical properties of products and by-products of the metallurgi-cal operation. Alumina is one of the most common and significant compounds that is associated with most of the secondary raw materials. Balancing the recycling advantages and possible adverse effects of the increased alumina content in the process is of much interest to the metals producers. In this paper, effects of alumina on melting and leaching behaviors of an industrial iron-silicate (fayalite-type) slag, from a Swedish copper producer, are studied. A reference slag sample, devoid of alumina addition, and three different mixtures of slag with 5, 10, and 15 wt-% alumina addition were prepared. After homogenization (re-melting) of the mixtures, in an induction furnace, the ma-terials were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). A standard single stage leaching test was used to study the leaching behavior of the samples. Dif-ferential scanning calorimetry (DSC), using Pt-Rh crucibles, was applied to investigate the melting and solidification properties of the mixtures. Results show that, this slag has an alumina saturation limit between 5 and 10 wt-% alumina additions. Chemical composition of the major phases does not change above the saturation and excess amount of aluminum is consumed for formation of a new aluminum containing phase, anorthite. Alumina addition increases the melting temperature continu-ously, while the rate of increase changes. Alumina contents close to the saturation limit of the slag decrease the leachability considerably.

Place, publisher, year, edition, pages
Germany: GDMB, 2011
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-37350 (URN)b58fead4-c520-4dee-9aec-341ed126db7d (Local ID)978-3-940276-36-0 (ISBN)b58fead4-c520-4dee-9aec-341ed126db7d (Archive number)b58fead4-c520-4dee-9aec-341ed126db7d (OAI)
Conference
European Metallurgical Conference : 26/06/2011 - 29/06/2011
Note
Godkänd; 2011; Bibliografisk uppgift: Die Deutsche Bibliothek lists this publication in the Deutsche Nationalbibliographie, detailed bibliographic data is available in the internet at http://dnb.ddb.de; 20110629 (sinmos)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-01-19Bibliographically approved
Mostaghel, S., Yang, Q. & Samuelsson, C. (2011). Recycling of cathode ray tube in metallurgical processes: Influence on environmental properties of the slag. Global Journal of Environmental Science and Technology, 1(Artikelnr: 19)
Open this publication in new window or tab >>Recycling of cathode ray tube in metallurgical processes: Influence on environmental properties of the slag
2011 (English)In: Global Journal of Environmental Science and Technology, ISSN 2248-9630, Vol. 1, no Artikelnr: 19Article in journal (Refereed) Published
Abstract [en]

A potential recycling rout for the end-of-life cathode ray tubes (CRT) is its application as a fluxing material in lead and copper smelting processes. Therefore, a thorough study on possible effects of the additional CRT on products and by-products of the metallurgical operation is required. In this paper, influences of CRT addition on mineralogy and leaching behaviour of a fayalite-type slag from a Swedish copper producer are investigated. Mixtures of slag/CRT, in different fractions, were prepared and re-melted in a Tamman furnace. Materials characterization using scanning electron microscopy (SEM) and X-ray diffraction (XRD), and standard leaching tests were done for all samples. Results depict that the main crystalline phase of the slag does not change due to CRT addition. By 10 wt-% CRT addition, leachability of major elements decreases; whereas, that of some minor elements increases. With 35 wt-% CRT addition, leaching of some environmentally detrimental elements make the material unacceptable for construction purposes according to the regulations.

National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
urn:nbn:se:ltu:diva-230 (URN)00cee852-a805-4e44-a442-ee0b467fe316 (Local ID)00cee852-a805-4e44-a442-ee0b467fe316 (Archive number)00cee852-a805-4e44-a442-ee0b467fe316 (OAI)
Note

Godkänd; 2011; 20110630 (sinmos)

Available from: 2016-09-20 Created: 2016-09-20 Last updated: 2018-03-15Bibliographically approved
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