磷石膏团粒的制备与填充效应验证  

Preparation and filling effect verification of phosphogypsum particles

作　　者：黄琬 谈云志[1] 陈君廉 吴赤球 吕伟 HUANG Wan;TAN Yunzhi;CHEN Junlian;WU Chiqiu;LV Wei(Yichang Key Laboratory of the Resources Utilization for Problematic Soils,China Three Gorges University,Yichang 443002,Hubei,P.R.China;Hubei Changyao New Materials Co.,Ltd.,Yichang 443100,Hubei,P.R.China)

机构地区：[1]三峡大学特殊土资源化利用宜昌市重点实验室,湖北宜昌443002 [2]湖北昌耀新材料股份有限公司,湖北宜昌443100

出　　处：《土木与环境工程学报(中英文)》2025年第2期182-190,共9页Journal of Civil and Environmental Engineering

基　　金：长江科学院开放研究基金(No.CKWV2021871/KY);湖北三峡实验室开放基金(No.SK211003)。

摘　　要：将磷石膏用于建筑材料的制备,是规模化消纳磷石膏的有效方式。然而,将粉末状态的磷石膏直接掺入,存在面源污染的风险。为此,提出制备以磷石膏为主要原料的压制团粒,以团粒的形式填充于胶凝材料,利用水泥胶凝团粒制备填充试样,开展抗压强度、磷(氟)污染物测定、孔隙结构分析、微观形貌分析等试验,验证磷石膏团粒的填充效应。结果表明,与粉末填充试样相比,团粒填充试样的强度性能更具优势,磷(氟)固定效果更佳。试样浸泡90 d后,浸泡溶液中氟离子质量浓度为0.035 mg/L,磷离子质量浓度为0.35 mg/L,均满足一级排放标准。另外,通过孔隙结构分析和微观形貌分析解释了团粒填充试样展现出的优异性能,验证了磷石膏以团粒形式填充于建筑材料中良好的填充效应。Preparing phosphogypsum for building materials is an effective way to consume phosphogypsum on a large scale.However,direct incorporation of phosphogypsum in powder form poses a risk of non-point source contamination.Therefore,the paper proposed to prepare pressed particles with phosphogypsum as the main raw material.Meanwhile,cement was used as the cementitious material,and the filling samples were prepared by adding these particles,then the tests such as compressive strength,determination of phosphorus(fluorine)pollutants,pore structure analysis,and microscopic morphological analysis were carried out to verify the filling effect of these particles.The results show that the strength performance of particles-filled samples is better than that of powders-filled samples,and their phosphorus(fluorine)fixation effect is also superior,after soaking for 90 days,the fluoride concentration in the leaching solution of particles-filled samples is 0.035 mg/L,and the phosphorus concentration is 0.35 mg/L,both of which meet the first-level emission standards,and the excellent performance of particles-filled samples is explained by pore structure analysis and microscopic morphological analysis.This research has successfully verified that phosphogypsum has a good filling effect when filled with building materials in the form of particles.

关 键 词：建筑材料 磷石膏 团粒 污染物 填充效应 

分 类 号：TU526[建筑科学—建筑技术科学]