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Preparation and properties of porous ceramics from spodumene flotation tailings by low-temperature sintering

Transactions of Nonferrous Metals Society of China 2021年第9期31卷 2797-2811页

作者： Jie YANG Long-hua XU Hou-qin WU Jiao JIN Key Laboratory of Solid Waste Treatment and Resource Recycle(Ministry of Education) Southwest University of Science and TechnologyMianyang 621010China State Key Laboratory for Environment-friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China School of Civil Engineering and Architecture Southwest University of Science and TechnologyMianyang 621010China School of Traffic and Transportation Engineering Changsha University of Science and TechnologyChangsha 410114China

Porous ceramics were prepared with spodumene flotation talings(SFT),kaolin and low-melting point glass(LPG)powder,whose pores were formed by the chemical reaction of hydrogen peroxide(H_(2)O_(2)).LPG was used to reduce the sintering temperature of porous ceramics and kaolin was used to realize the adsorption to methylene blue(MB)of porous *** average flexural strength,compressive strength,apparent porosity,water absorption and maximum MB adsorption capacity were 5.60 MPa,4.66 MPa,52.27%,44.32%and 0.7 mg/g,***,the results of orthogonal experiments present that the sintering temperature and the dosage of H_(2)O_(2)had great influence on the mechanical properties and apparent porosity of porous ceramics,*** main reason for the improvement of mechanical properties of porous ceramics was that LPG gradually became soft with increasing the sintering temperature,which made the mineral particles adhere to each other *** was not completely converted into metakaolin at 550℃,which might be the main reason why porous ceramics had adsorption properties.

关键词： spodumene flotation tailings porous ceramics low-temperature sintering absorption

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