磷石膏悬浮煅烧制备高品质Ⅱ型无水石膏试验研究

金属矿山 ›› 2025, Vol. 54 ›› Issue (7): 293-298.

磷石膏悬浮煅烧制备高品质Ⅱ型无水石膏试验研究

黄　昊1,2,3 　李艳军1,2,3 　袁　帅1,2,3 　高　鹏1,2,3

1. 矿物加工科学与技术全国重点实验室,辽宁沈阳 110819;2. 东北大学资源与土木工程学院,辽宁沈阳 110819; 3. 难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,辽宁沈阳 110819

出版日期:2025-07-15 发布日期:2025-08-14
通讯作者: 李艳军(1972—),男,教授,博士,博士研究生导师。
作者简介:黄　昊(1999—),男,硕士研究生。
基金资助:
兴辽英才青年拔尖人才项目(编号:XLYC2203167)。

Experimental Study on Preparation of High Quality Type II Anhydrite Gypsum by Suspension Calcination Using Phosphogypsum #br#

HUANG Hao 1,2,3 　 LI Yanjun 1,2,3 　 YUAN Shuai 1,2,3 　 GAO Peng 1,2,3

1. State Key Laboratory of Mineral Processing,Shenyang 110819,China;2. School of Resources and Civil Engineering, Northeastern University,Shenyang 110819,China;3. National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China

Online:2025-07-15 Published:2025-08-14

摘要/Abstract

摘要： 针对传统磷石膏煅烧工艺传热效率低、能耗偏高的问题,探究高效低耗的磷石膏资源化利用技术,制备高品质Ⅱ型无水石膏。采用煅烧工艺,系统考察煅烧温度、时间及煅烧方式对产物性能的影响,并通过 X 射线衍射 (XRD)、傅立叶红外光谱(FTIR)和扫描电子显微镜(SEM)等手段表征产物特性。优化得到最佳工艺条件为 700 ℃悬浮煅烧 60 min,此时产物中Ⅱ型无水石膏含量达 90. 49%,结晶水残留量 0. 48%,白度值 91. 8%,各项指标均符合《磷石膏处理处置规范》(GB/ T 32124—2024);相较于静态煅烧,悬浮煅烧可显著提升产物纯度与白度,降低结晶水含量, 且明确了磷石膏向Ⅱ型无水石膏的转化机制。悬浮煅烧工艺为磷石膏的高值化利用提供了高效可行的技术路径,相关研究结果具有重要的理论与应用价值。

关键词: 磷石膏　 Ⅱ型无水石膏　悬浮煅烧　结晶水　白度

Abstract: In order to address the issues of low heat transfer efficiency and high energy consumption in traditional phosphogypsum calcination processes,this study explores efficient and low-consumption resource utilization technologies for phosphogypsum to produce high-quality Type Ⅱ anhydrite. Using a calcination process,it systematically investigates the influence of calcination temperature,time,and method on product performance. The product characteristics were characterized using X-ray diffraction (XRD),Fourier transform infrared spectroscopy ( FTIR),and scanning electron microscopy ( SEM). The optimal process conditions were determined to be suspension calcination at 700 ℃ for 60 minutes. Under these conditions,the product achieved a Type Ⅱ anhydrite content of 90. 49%,residual crystal water content of 0. 48%,and whiteness value of 91. 8%. All indicators comply with the Treatment and Disposal Specifications for Phosphogypsum (GB/ T 32124—2024). Compared to static calcination,suspension calcination significantly enhances product purity and whiteness while reducing crystal water content. The transformation mechanism of phosphogypsum to Type Ⅱ anhydrite was elucidated. The suspension calcination process provides an efficient and feasible technical pathway for the high-value utilization of phosphogypsum,and the related findings hold significant theoretical and practical value.

Key words: phosphogypsum,type Ⅱ anhydrite gypsum,suspension calcination,water of crystallisation,whiteness

中图分类号:

TD985

黄　昊, 　李艳军, 　袁　帅, 　高　鹏, . 磷石膏悬浮煅烧制备高品质Ⅱ型无水石膏试验研究 [J]. 金属矿山, 2025, 54(7): 293-298.

HUANG Hao , 　 LI Yanjun , 　 YUAN Shuai , 　 GAO Peng , . Experimental Study on Preparation of High Quality Type II Anhydrite Gypsum by Suspension Calcination Using Phosphogypsum #br#[J]. Metal Mine, 2025, 54(7): 293-298.

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