磷石膏常压制备硫酸钙晶须试验及机理研究

金属矿山 ›› 2025, Vol. 54 ›› Issue (9): 279-286.

磷石膏常压制备硫酸钙晶须试验及机理研究

李育彪^1,2 　池汝安1 　李　瑞² 　喻文强² 　薛璐韬²

1. 湖北三峡实验室,湖北宜昌 443000;2. 武汉理工大学资源与环境工程学院,湖北武汉 430070

出版日期:2025-09-15 发布日期:2025-10-10
作者简介:李育彪(1985—),男,教授,博士,博士研究生导师。
基金资助:
湖北三峡实验室开放/ 创新基金项目(编号:SC232019);湖北省科技重大专项(编号:2022ACA004-6)。

Experiment and Mechanism Study on the Preparation of Calcium Sulfate Whiskers Using Phosphogypsum under Atmospheric Pressure

LI Yubiao ^1,2 　 CHI Ru′an ¹ 　 LI Rui ² 　 YU Wenqiang ² 　 XUE Lutao ²

1. Hubei Three Gorges Laboratory,Yichang 443000,China; 2. School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China

Online:2025-09-15 Published:2025-10-10

摘要/Abstract

摘要： 为改进常压酸化法制备硫酸钙晶须产率低的难题,研究采用超声与氯盐(氯化钠与氯化钙)添加剂结合的方式改进晶须产品产率。结果表明:8 g 磷石膏与 400 g 酸浸溶液在超声频率 40 kHz、氯化钠浓度 1. 5 mol / L 条件下反应,反应结束后添加质量比(氯化钙与磷石膏)为 1. 5 的氯化钙,晶须产率可达 77. 63%。机理研究表明:氯化钠通过电荷效应与盐效应促进磷石膏溶解的方式提高晶须产率,而氯化钙通过同离子效应提升析晶程度的方式提高晶须产率。此晶须产率改进工艺所制产品为二水硫酸钙晶须,纯度达 99. 78%,白度达 96. 43%,长径比达 78,满足行业标准(DB43 / T 1155—2016)的要求。

关键词: 常压酸化法　磷石膏　硫酸钙晶须　产率改进

Abstract: In order to improve the problem of low yield of calcium sulfate whiskers prepared by atmospheric pressure acidification. In this study,ultrasound and chloride additives (sodium chloride and calcium chloride) were used to improve the yield of whisker products. The results showed that when 8 g of phosphogypsum reacted with 400 g of acid leaching solution under the conditions of ultrasonic frequency of 40 kHz and sodium chloride concentration of 1. 5 mol / L,while calcium chloride with mass ratio (calcium chloride / phosphogypsum) of 1. 5 was added after the reaction,the whisker yield reached 77. 63%. The mechanism study shows that the sodium chloride increases the whisker yield by promoting the dissolution of phosphogypsum through charge effects and salt effects. Meanwhile,the calcium chloride improved the yield of whiskers by increasing the degree of crystallizeout through the coion effect. In addition,the whisker yield improving process produced calcium sulfate dihydrate whiskers with purity 99. 78%,whiteness 96. 43% and length-diameter 78,which met the requirements of the industry standard (DB43 / T 1155—2016).

Key words: atmospheric pressure acidification method,phosphogypsum,calcium sulfate whisker,increasing the yield

中图分类号:

李育彪, 　池汝安　李　瑞　喻文强　薛璐韬. 磷石膏常压制备硫酸钙晶须试验及机理研究[J]. 金属矿山, 2025, 54(9): 279-286.

LI Yubiao , 　 CHI Ru′an 　 LI Rui 　 YU Wenqiang 　 XUE Lutao . Experiment and Mechanism Study on the Preparation of Calcium Sulfate Whiskers Using Phosphogypsum under Atmospheric Pressure [J]. Metal Mine, 2025, 54(9): 279-286.

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