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Dusting control of magnesium slag produced by Pidgeon process
School of Material Science and Engineering, Beifang University of Nationalities, Wenchangbeilu, Yinchuan.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
School of Material Science and Engineering, Beifang University of Nationalities, Wenchangbeilu, Yinchuan.
School of Chemical Engineering, Beifang University of Nationalities, Yinchuan.
2013 (English)In: Powders and grains 2013: proceedings of the 7th International Conference on Micromechanics of Granular Media : Sydney, Australia: 8-12 July 2013 / [ed] Aibing Yu, Melville, NY: American Institute of Physics (AIP), 2013, p. 1282-1285Conference paper, Published paper (Refereed)
Abstract [en]

Magnesium production by Pidgeon process has been developed very fast in China since 1990's. The waste slag from magnesium production has attracted broad attention because the huge amounts of the slag. For each ton of magnesium produced, there will be 6-8 tons of the slag generated. A big part of the Mg slag exists as fine dust with particle size of D95 < 0.1mm, which may pollute air, soil and water surrounding the Mg industry. The fine particles are generated by phase transformations of dicalcium silicate C2S (2CaOṡSiO 2) during the slag cooling. There is a volume expansion of more than 10% with the transformation of β-C2S to γ-C2S phase, causing a disintegration or dusting of the Mg slag. In the present study, several chemical stabilizers were used to treat the dusting Mg slag at 1200°C, including borates, phosphates and rare earth oxides, in order to obtain volume stable slag aggregates for environmental protection and recycling of the Mg slag. The volume expanding rates of the samples were measured. XRD and SEM studies were carried out to confirm effects of the stabilizers. The results show that all of the stabilizers were effective for the stabilization of Mg slag. Some differences between the stabilizers were also described and discussed

Place, publisher, year, edition, pages
Melville, NY: American Institute of Physics (AIP), 2013. p. 1282-1285
Series
A I P Conference Proceedings Series, ISSN 0094-243X ; 1542
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-28119DOI: 10.1063/1.4812173Local ID: 1ce2c0a5-364b-4082-8730-9351f0c5808dISBN: 9780735411661 (electronic)OAI: oai:DiVA.org:ltu-28119DiVA, id: diva2:1001313
Conference
International Conference on Micromechanics of Granular Media : 08/07/2013 - 12/07/2013
Note
Validerad; 2013; 20130815 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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