Abstract: As an emerging lightweight green building material, foamed concrete has developed rapidly in the past ten years, and has a relatively wide application prospect. In the preparation process of foamed concrete, the mixing of slurry and foam is the key to determine the product performance. However, there are too much attention paid to the foaming process, but not to the mixing process, thus the theoretical research and equipment development of the mixing process are lacking. Therefore, it is necessary to create a special mixer that meets the performance of foamed concrete materials and realizes continuous and efficient production. Considering the characteristics of mixers comprehensively, static mixer has been researched in this work. The numerical simulation was carried out for the mixing process of foam slurry, and a three-dimensional model was established. By simulating the mixing of cement slurry and foam with different parameters, the number of components, the inner diameter of the pipe, the angle of the components and the position of the feeding port were studied respectively. The results showed that when the cutting action of the components is perpendicular to the fluid distribution, the more conducive to mixing; the smaller the inner diameter of the mixer tube, the faster the mixing speed, the more uniform of the density distribution, but simultaneously, the energy consumption of the equipment is higher. The number of components is positively related to the mixing effect of the final product. The smaller the distance between the feeding port and the mixing element, the better for uniform mixing. To sum up, under the optimal conditions of θ=90°, D=60 mm, n=10, L=20 mm, foamed concrete with uniform mixing and density of 1 400 kg/m3 can be finally prepared. This research provides the theoretical support for the research and development of a new type mixing device for foamed concrete.
1 Lei D Y, Liu C K, Liu J X, et al. Materials Reports, 2024, 38(14), 117 (in Chinese). 雷东移, 刘承侃, 刘佳鑫, 等. 材料导报, 2024, 38(14), 117. 2 Li H R, Geng F, Zhuo Y W, et al. Low Temperature Architecture Technology, 2013, 35(10), 1 (in Chinese). 李浩然, 耿飞, 卓跃武, 等. 低温建筑技术, 2013, 35(10), 1. 3 Tian Z, Chen J X, Ge J C. Machinery Design & Manufacture, 2016(5), 14 (in Chinese). 田壮, 陈金祥, 葛金翠. 机械设计与制造, 2016(5), 14. 4 Zheng S X. Chemical Production and Technology, 2000(2), 33 (in Chinese). 郑四仙. 化工生产与技术, 2000(2), 33. 5 Li C X. Energy Conservation, 1995(2), 17 (in Chinese). 李纯煦. 节能, 1995(2), 17. 6 Lu Z M, Xu B. Chemical Engineering(China), 1994(5), 59 (in Chinese). 陆振民, 徐斌. 化学工程, 1994(5), 59. 7 Yu Y F, Wu J H, Meng H B. Machinery Design & Manufacture, 2007(5), 211 (in Chinese). 禹言芳, 吴剑华, 孟辉波. 机械设计与制造, 2007(5), 211. 8 Yu Y F, Liu H C, Meng H B, et al. CIESC Journal, 2022, 73(8), 3565 (in Chinese). 禹言芳, 刘桓辰, 孟辉波, 等. 化工学报, 2022, 73(8), 3565. 9 Meng H B, Wu J H, Yu Y F. Chemical Engineering(China), 2009, 37(4), 23 (in Chinese). 孟辉波, 吴剑华, 禹言芳, 等. 化学工程, 2009, 37(4), 23. 10 Putra R A. Angkasa, Jurnal Ilmiah Bidang Teknologi, 2020, 2(2), 117. 11 Kim Y, Nematollahi O, Kim H D, et al. Journal of Visualization, 2021, 24(4), 671. 12 Cai Y J. Liaoning Chemical Industry, 2005(10), 445 (in Chinese). 蔡援建. 辽宁化工, 2005(10), 445. 13 Wang X Q, Cheng Z K, Ma Y J, et al. Contemporary Chemical Industry, 2020, 49(6), 1146 (in Chinese). 王小强, 程中克, 马艳捷, 等. 当代化工, 2020, 49(6), 1146. 14 Zhang Y. Hangzhou Chemical Industry, 2005, 35(1), 33 (in Chinese). 张奕. 杭州化工, 2005, 35(1), 33. 15 Meng J J. Global Alcinfo, 2012(3), 43 (in Chinese). 孟建军. 啤酒科技, 2012(3), 43. 16 Weng X Y. Design and application research of liquid-liquid two-phase flow mixer used in the treatment of acetic acid wastewater. Master’s Thesis, Changzhou University, China, 2021 (in Chinese). 翁祥宇. 用于醋酸废水处理的液液两相流混合器的设计及应用研究. 硕士学位论文, 常州大学, 2021. 17 Zhang G F, Zhang Q, Zhang M L. China Petroleum Machinery, 2015, 43(11), 92 (in Chinese). 张国锋, 张琴, 张慢来, 等. 石油机械, 2015, 43(11), 92. 18 Zhou G, Liu T, Huang Y Q. Oil-Gas Field Surface Engineering, 2017, 36(7), 90 (in Chinese). 周钢, 刘涛, 黄延强. 油气田地面工程, 2017, 36(7), 90. 19 Zhu C, Qin B, Lu Y, et al. Journal of Chemical Engineering of Japan, 2016, 49(6), 503. 20 Tian Z. Study on numerical simulation and quality control of foam concrete mixing process. Master’s Thesis, Southwest University of Science and Technology, China, 2016 (in Chinese). 田壮. 泡沫混凝土混泡过程数值模拟及质量控制研究. 硕士学位论文, 西南科技大学, 2016. 21 中华人民共和国工业和信息化部. 静态混合器, JB/T 7660-1995, 中华人民共和国工业和信息化部, 1996. 22 彭钧. 静态混合器的设置, HGT2057020-95, 1995. 23 Ou G F, Zheng Z J, Jin H Z. Journal of Chemical Engineering of Chinese Universities, 2016, 30(1), 40 (in Chinese). 偶国富, 郑智剑, 金浩哲. 高校化学工程学报, 2016, 30(1), 40. 24 Chen Jianguo. In:International Conference on Materials for Renewable Energy & Environment. Shanghai, China, 2011, pp.1820. 25 Pei K K. Chemical and Pharmaceutical Engineering, 2021, 42(2), 7 (in Chinese). 裴凯凯. 化工与医药工程, 2021, 42(2), 7. 26 Xu J X. Research on evaluation methods and applications of stirring and mixing effects in multiphase systems. Ph. D. Thesis, Kunming University of Science and Technology, China, 2012 (in Chinese). 徐建新. 多相体系搅拌混合效果评价方法及其应用研究. 博士学位论文, 昆明理工大学, 2012.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2024, Vol. 38 
