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From ferronickel sl...
From ferronickel slag to value-added refractory materials : A microwave sintering strategy
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- Peng, Zhiwei (author)
- Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
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- Tang, Huimin (author)
- Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
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- Augustine, Robin, 1982- (author)
- Uppsala universitet,Fasta tillståndets elektronik
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- Le, Joonho (author)
- Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea
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- Tian, Weiguang (author)
- Guangdong Guangqing Met Technol Co Ltd, Yangjiang 529500, Guangdong, Peoples R China
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- Chen, Yanhu (author)
- Guangdong Guangqing Met Technol Co Ltd, Yangjiang 529500, Guangdong, Peoples R China
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- Gu, Foquan (author)
- Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
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- Zhang, Yuanbo (author)
- Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
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- Li, Guanghui (author)
- Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
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- Jiang, Tao (author)
- Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
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(creator_code:org_t)
- ELSEVIER, 2019
- 2019
- English.
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In: Resources, Conservation and Recycling. - : ELSEVIER. - 0921-3449 .- 1879-0658. ; 149, s. 521-531
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The present study proposes a novel strategy for preparation of refractory materials from potentially hazardous ferronickel slag by microwave sintering of the slag with addition of sintered magnesia in which a series of chemical reactions were involved. This strategy was developed based on examination of the phase transformations and microstructural changes of the slag during microwave sintering through X-ray diffraction (XRD) analysis and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) analysis, which determined the properties of refractory materials derived from the slag. It was shown that under microwave irradiation there existed rapid transformation of the olivine phase in the slag to high-melting point phases, including forsterite and spinels (e.g., magnesium iron chromate spinel, magnesium chromate spinel, and magnesium iron aluminate spinel). As a result, a high-quality refractory material with refractoriness of 1730 degrees C, bulk density of 2.80 g/cm(3), apparent porosity of 1.6%, and compressive strength of 206.62 MPa was obtained by microwave sintering of the slag at 1350 degrees C for only 20 min with addition of 25 wt % sintered magnesia. Because the microwave sintering strategy not only elevated the refractoriness by 70 degrees C, but also reduced the heating duration required by the conventional approach by 6 times, it demonstrated apparent technological superiority and wide application prospect in preparing superior-quality refractory materials from ferronickel slag and relevant industrial waste, which contributed to conservation of resources and energy as well as environmental protection.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Keyword
- Ferronickel slag
- Refractory material
- Microwave sintering
- Phase transformation
- Spinel
Publication and Content Type
- ref (subject category)
- art (subject category)
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Peng, Zhiwei
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Tang, Huimin
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Augustine, Robin ...
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Le, Joonho
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Tian, Weiguang
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Chen, Yanhu
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Gu, Foquan
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Zhang, Yuanbo
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Li, Guanghui
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Jiang, Tao
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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Uppsala University