磷石膏一步法制备β型建筑石膏粉试验研究  

Experimental study on preparation ofβ-building gypsum powder with phosphogypsum by one-step method

作　　者：吴照洋[1,2,3] 张永兴 张利珍[1,2,3] 张志湘 Wu Zhaoyang;Zhang Yongxing;Zhang Lizhen;Zhang Zhixiang(Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS,Zhengzhou Henan 450006,China;China National Engineering Research Center for Utilization of Industrial Minerals,Zhengzhou Henan 450006,China;Northwest China Center for Geological Technology Innovation,Xi'an Shaanxi 710054,China)

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]国家非金属矿资源综合利用工程技术研究中心,河南郑州450006 [3]西北地质科技创新中心,陕西西安710054

出　　处：《化工矿物与加工》2021年第6期36-40,共5页Industrial Minerals & Processing

基　　金：中国地质调查局地质调查项目(DD20190590)。

摘　　要：以云南某磷化工企业副产磷石膏为研究对象,通过对其制备建筑石膏粉的温控机制的研究,采用一步法制备出了β建筑石膏粉,并对β建筑石膏粉的组成及力学性能进行了分析,结果表明:在煅烧温度为170℃、升温速率为10℃/min、保温2 h、陈化5 d的条件下,β建筑石膏粉的β半水石膏质量分数达到74.61%、绝干抗压强度达到6.15 MPa、绝干抗折强度达到3.71 MPa,与天然石膏粉性能相近,可以替代天然石膏粉使用,对于磷石膏的资源化利用具有积极的推动作用。Based on the phosphogypsum as a by-product of a phosphate chemical company in Yunnan province,β-calcined(building)gypsum powder was prepared by one-step method and the temperature control mechanism for the preparation was studied.The phase composition and mechanical properties of calcined(building)gypsum powder were analyzed.The results show that under the conditions as follows:calcination temperature of 170℃,heating rate of 10℃/min,heat preservation for 2 hours and aging for 5 days,the preparation ofβ-calcined(building)gypsum powder with the concentration of 74.61%CaSO 4·0.5 H 2O,absolute dry compression strength of 6.15 MPa and absolute dry bending strength of 3.71 MPa can be completed,of which performance are similar to natural gypsum powder for building purpose.As a result,it is allowed to be applied as the replacement of natural gypsum powder,which facilitates the utilization of phosphogypsum resource.

关 键 词：磷石膏 建筑石膏 温控机制 β半水石膏 抗压强度 抗折强度 

分 类 号：X781.3[环境科学与工程—环境工程]