化工学报2025，Vol.76Issue(3)：1323-1333,11.DOI:10.11949/0438-1157.20240833
K-B-Al体系对磷矿熔融特性及玻璃结构的影响
Effect of K-B-Al ternary system on the melting characteristics and glass structure of tailings
摘要
Abstract
To solve the problem of phosphate tailings accumulation,this study uses phosphate tailings and low-grade phosphate rock as the main raw materials,B2O3,Al2O3,KCl and other additives,to activate phosphate tailings and low-grade phosphate ore through thermal processing and prepare glass fertilizer.The influence of K-B-Al system on the melting characteristics of phosphorus tailings system was investigated by single factor and response surface experiments.The influence of additives on the activation effect of elements and slag phase structure of molten products was discussed by combining X-ray diffraction(XRD),Fourier infrared spectroscopy(FTIR)and X-ray photoelectron spectroscopy(XPS).The results show that when the ratio of phosphorus tailings,low-grade phosphate rock,serpentine,KCl,B2O3 and Al2O3 is 55∶25∶20∶7∶10∶1.5,the lowest melt flow temperature TF of the system is 1135℃,which is 335℃lower than that of the conventional system.The activation rates of P2O5,CaO,and MgO in the glass fertilizer melted at 1350℃are all about 95%.The effects of melting temperature and additives on the glass network structure of the material are analyzed.Under the selected process conditions,B2O3 mainly breaks the silicon oxygen network,while Al2O3 participates in the network composition and also destroys the silicon oxygen network.关键词
磷尾矿/玻璃肥料/硅氧结构/活化/废物处理/优化设计Key words
phosphate tailings/glass ferilizer/silicon oxide structure/activation/waste treatment/optimal design分类
化学化工引用本文复制引用
陈仲卿,刘家旭,王艳语,井红权,侯翠红,屈凌波..K-B-Al体系对磷矿熔融特性及玻璃结构的影响[J].化工学报,2025,76(3):1323-1333,11.基金项目
中国工程科技发展战略河南研究院战略咨询研究项目(2023HENYB03) （2023HENYB03）
国家磷资源开发利用工程技术研究中心开放基金项目(NECP2022-02) （NECP2022-02）
