【摘要】 通过模拟实验研究了利用高温磷渣液直接制备微晶铸石的工艺。以磷渣重熔成的磷渣液作为主要原料,掺量为75%,另掺25%的辅助原料,经热配料、混熔、浇铸成型、晶化退火后制得微晶铸石。XRD测定铸石的主晶相为β-硅灰石;SEM观测铸石是由粒径为0.2~0.5μm的晶体颗粒构成的纤维状晶体集合体;物化性能测试结果显示样品的抗折强度为37.17MPa,耐碱性为0.02%,耐酸性为0.42%,均符合建筑材料相关质量标准。本文的实验工艺适合工业化生产,为高温磷渣液的直接资源化利用、解决磷渣环境污染等问题提供了实验依据。更多还原

【Abstract】 This paper deals with the process of preparing cast stones directly from thermal phosphorous slag liquid.In the experiment,75% solid phosphorous slag was remelted into thermal liquid,then mixed with 25% secondary raw materials,and subsequently melted together into the modified slag liquid that was cast,crystallized and annealed,thus resulting in the formation of cast stones.XRD and SEM observations confirmed that the main crystal phase of the cast stones was β-wollastonite,and the fibriform crystals assumed compactly granular form with the size of 0.2-0.5 μm.The bending strength,alkali resistance and acid resistance of the cast stone were respectively 37.17 MPa,0.02% and 0.42%,consistent with the quality standards of construction materials.The process presented by the authors is suitable for industrial application,and the study is also a basic work of the resource recycle of thermal phosphorous slag liquid and the environment protection of phosphor industry.更多还原