SiO_2-Al_2O_3-MgO系煤矿废弃物泡沫隔热陶瓷的制备研究
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摘要
以煤矿废弃物煤矸石和煤炭伴生页岩为主要原材料,抛光渣为造孔剂、滑石为助熔剂,制备泡沫隔热陶瓷。借鉴三元相图分析方法,研究原材料化学组成配比对泡沫隔热陶瓷物理性能的影响,并优化其组成配比。研究表明,当控制SiO_2-Al_2O_3-MgO系统的SiO_2为71. 7%～72. 8%、Al_2O_3为16%～16. 5%和MgO为11. 2%～12. 4%范围内时,泡沫隔热陶瓷的孔隙率大于70%,吸水率小于0. 25%,抗压强度大于12 MPa。
Foam thermal insulation ceramics were prepared by using coal gangue and shale in coal mine as main raw materials,polishing slag as a forming agent,and talc as a fluxing agent. The influence of the chemical composition ratio of raw materials on the physical properties of foam thermal insulation ceramics was studied by using the ternary phase diagrams. And the composition ratio of raw materials was optimized. The results show that when the ratio of SiO_2,Al_2O_3,MgO in SiO_2-Al_2O_3-MgO system is controlled in the range of 71. 7%-72. 8%,16%-16. 5% and 11. 2%-12. 4% respectively. The porosity of foam thermal insulation ceramic is more than 70%,the water absorption is less than 0. 25%,and the compressive strength is more than 12 MPa.
Foam thermal insulation ceramics were prepared by using coal gangue and shale in coal mine as main raw materials,polishing slag as a forming agent,and talc as a fluxing agent. The influence of the chemical composition ratio of raw materials on the physical properties of foam thermal insulation ceramics was studied by using the ternary phase diagrams. And the composition ratio of raw materials was optimized. The results show that when the ratio of SiO_2,Al_2O_3,MgO in SiO_2-Al_2O_3-MgO system is controlled in the range of 71. 7%-72. 8%,16%-16. 5% and 11. 2%-12. 4% respectively. The porosity of foam thermal insulation ceramic is more than 70%,the water absorption is less than 0. 25%,and the compressive strength is more than 12 MPa.
引文
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[4]Wang J M,Qin Q,Hu S J,et al.A Concrete Material with Waste Coal Gangue and Fly Ash Used for Farmland Drainage in High Groundwater Level Areas[J].Journal of Cleaner Production,2015,112:631-638.
[5]Wu H,Wen Q B,Hu L M,et al.Feasibility Study on the Application of Coal Gangue as Landfill Liner Material[J].Waste Management,2017,63:161-171.
[6]Jablońska B,Kityk A V,Busch M,et al.The Structural and Surface Properties of Natural and Modified Coal Gangue[J].Journal of Environmental Management,2017,190:80-90.
[7]Liu H B,Liu Z L.Recycling Utilization Patterns of Coal Mining Waste in China[J].Resources Conservation&Recycling,2010,54(12):1331-1340.
[8]Li Z,Li X,Tang Y,et al.Sintering Behaviour and Characterisation of Low-cost Ceramic Foams from Coal Gangue and Waste Quartz Sand[J].Advances in Applied Ceramics,2016,115(7):1-7.
[9]Wang Z,Feng P Z,Geng P,et al.Porous Mullite Thermal Insulators from Coal Gangue Fabricated by a Starch-Based Foam Gel-casting Method[J].Journal of the Australian Ceramic Society,2017(5):1-5.
[10]胡明玉,叶晓春,黄洁宁.煤矿废弃物泡沫隔热陶瓷的组成结构及物性一体化设计[J].中国陶瓷,2017(1):63-69.
[11]黄洁宁.利用煤矿废弃物制备泡沫隔热陶瓷研究[D].南昌:南昌大学,2014.
[12]Deng X G,Ran S L,Han L,et al.Foam-gelcasting Preparation of High-Strength Self-reinforced Porous Mullite Ceramics[J].Journal of the European Ceramic Society,2017,37(13):4059-4066.
[13]Liu J J,Li Y B,Li Y W,et al.Effects of Pore Structure on Thermal Conductivity and Strength of Alumina Porous Ceramics Using Carbon Black as Pore-Forming Agent[J].Ceramics International,2016,42(7):8221-8228.
[14]倪文,陈娜娜.堇青石矿物学研究进展[J].矿物岩石,1996,16(4):126-134.
[15]浙江大学,武汉建筑材料工业学院等.硅酸盐物理化学[M].北京:中国建筑工业出版社,1981.