Preparation and characterization of porous ceramics from nickel smelting slag and metakaolin |
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| Affiliation: | 1. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China;2. Department of Chemistry, College of Natural and Computational Science, Energy and Environment Research Center, Dilla University, Dill 419, Ethiopia;3. Department of Industrial Chemistry, College of Applied Sciences, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia;1. School of Materials Engineering, YanCheng Institute of Technology, YanCheng 224051, People''s Republic of China;2. Center of Condensed Matter and Materials Physics, Department of Physics, Beihang University, Beijing 100191, People''s Republic of China;1. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China;2. School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA;3. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;1. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Jiangsu 224051, China;2. Department of Chemistry, Institute of Aeronautical Engineering College, Hyderabad, India;1. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, China;2. School of Electrical, Computer and Energy Engineering Arizona State University Tempe, AZ, 85287, USA;3. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China;1. Center of Condensed Matter and Materials Physics, Department of Physics, Beihang University, Beijing 100191, People''s Republic of China;2. School of Materials Engineering, YanCheng Institute of Technology, YanCheng 224051, People''s Republic of China |
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| Abstract: | Porous ceramics with high porosity and low bulk density were prepared by using nickel slag and metakaolin as the primary raw materials, glass powder as flux, and SiC as the foaming agent. The content of nickel slag and foaming agent had a significant effect on the bulk density, porosity, and flexural strength of the porous ceramics. The porous ceramics with the best properties were obtained at 1100 °C for 30 min with 50 wt% nickel slag, 40 wt% metakaolin, 10 wt% waste glass, and 0.8 wt% SiC. It had a low bulk density (as low as 245 kg/m3), high flexural strength and compressive strength (0.6 MPa and 1.17 MPa, respectively), and high porosity (about 89.8%). The nickel slag was magnetically separated as well. The density of nickel slag powder could be reduced via magnetic separation, and there was no significant change in the crystal structure of the raw material. Compared with porous ceramics prepared using nickel slag without magnetic separation, ceramics subjected to magnetic separation had lower bulk density, higher porosity, and the same phase composition. This study can be used as an indicator for the application of nickel slag in porous ceramics, which is of great significance in providing a great substitute nickel slag towards recovery and utilization. |
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| Keywords: | Nickel slag Metakaolin Porous ceramics Magnetic separation |
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