Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish Slag
Ferrochrome slag (FS) and tundish slag (TS) are two typical slags containing high contents of Cr<sub>2</sub>O<sub>3</sub> (3.88 wt.%) and MnO (18.69 wt.%), respectively. In this study, batches of ceramics were prepared from FS and TS, and their Cr/Mn leaching behaviors, mecha...
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| author | Dejian Pei Yu Li Xiangjie Duan Daqiang Cang Yindong Yang Alex McLean Zhancheng Guo Chuanhua Xu |
| author_facet | Dejian Pei Yu Li Xiangjie Duan Daqiang Cang Yindong Yang Alex McLean Zhancheng Guo Chuanhua Xu |
| author_sort | Dejian Pei |
| collection | DOAJ |
| description | Ferrochrome slag (FS) and tundish slag (TS) are two typical slags containing high contents of Cr<sub>2</sub>O<sub>3</sub> (3.88 wt.%) and MnO (18.69 wt.%), respectively. In this study, batches of ceramics were prepared from FS and TS, and their Cr/Mn leaching behaviors, mechanical properties and microstructures were investigated. Results showed that ceramics with 80 wt.% FS or 85 wt.% TS had acceptable properties. By controlling its composition and sintering temperature, pyroxene or spinel phases could become the main crystalline phases of the fired ceramics containing either of the two slags. For both slag series, pyroxene phases contributed to higher bending strengths, whereas spinel phases led to lower Cr/Mn leaching rates. Both ceramic containing 20 wt.% FS and ceramic containing 85 wt.% TS had the main crystals of pyroxene phases and possessed the highest bending strengths (FS20: 114.52 MPa and TS85: 124.61 MPa). However, both ceramic containing 80 wt.% FS and ceramic containing 25 wt.% TS with main crystals from the spinel phases had the lowest Cr/Mn leaching rates (FS80: Cr 0.05% and TS25: Mn 0.43%). Therefore, optimum designs for the compositions of ceramics from different slags were achieved by changing the proportions of pyroxene and spinel phases to obtain a balance between the high strengths of materials and the stable retention of heavy metal ions. This study provides an important basis for long-term research on the large-scale reuse of heavy metal-containing slags in the ceramic industry. |
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| spelling | doaj.art-e79ed1a713e84096a4bff0fd133f9e642023-11-30T21:17:10ZengMDPI AGMaterials1996-19442022-03-01156199310.3390/ma15061993Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish SlagDejian Pei0Yu Li1Xiangjie Duan2Daqiang Cang3Yindong Yang4Alex McLean5Zhancheng Guo6Chuanhua Xu7State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, ON M5S 3E4, CanadaDepartment of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, ON M5S 3E4, CanadaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaSinosteel Maanshan General Institute of Mining Research Co., Ltd., Maanshan 243000, ChinaFerrochrome slag (FS) and tundish slag (TS) are two typical slags containing high contents of Cr<sub>2</sub>O<sub>3</sub> (3.88 wt.%) and MnO (18.69 wt.%), respectively. In this study, batches of ceramics were prepared from FS and TS, and their Cr/Mn leaching behaviors, mechanical properties and microstructures were investigated. Results showed that ceramics with 80 wt.% FS or 85 wt.% TS had acceptable properties. By controlling its composition and sintering temperature, pyroxene or spinel phases could become the main crystalline phases of the fired ceramics containing either of the two slags. For both slag series, pyroxene phases contributed to higher bending strengths, whereas spinel phases led to lower Cr/Mn leaching rates. Both ceramic containing 20 wt.% FS and ceramic containing 85 wt.% TS had the main crystals of pyroxene phases and possessed the highest bending strengths (FS20: 114.52 MPa and TS85: 124.61 MPa). However, both ceramic containing 80 wt.% FS and ceramic containing 25 wt.% TS with main crystals from the spinel phases had the lowest Cr/Mn leaching rates (FS80: Cr 0.05% and TS25: Mn 0.43%). Therefore, optimum designs for the compositions of ceramics from different slags were achieved by changing the proportions of pyroxene and spinel phases to obtain a balance between the high strengths of materials and the stable retention of heavy metal ions. This study provides an important basis for long-term research on the large-scale reuse of heavy metal-containing slags in the ceramic industry.https://www.mdpi.com/1996-1944/15/6/1993pyroxene/spinelceramicsCr/Mn leachingmechanical propertiescleaner industrial chain |
| spellingShingle | Dejian Pei Yu Li Xiangjie Duan Daqiang Cang Yindong Yang Alex McLean Zhancheng Guo Chuanhua Xu Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish Slag Materials pyroxene/spinel ceramics Cr/Mn leaching mechanical properties cleaner industrial chain |
| title | Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish Slag |
| title_full | Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish Slag |
| title_fullStr | Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish Slag |
| title_full_unstemmed | Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish Slag |
| title_short | Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish Slag |
| title_sort | effect of phase composition on leaching behavior and mechanical properties of ceramics from ferrochrome slag and tundish slag |
| topic | pyroxene/spinel ceramics Cr/Mn leaching mechanical properties cleaner industrial chain |
| url | https://www.mdpi.com/1996-1944/15/6/1993 |
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