无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2025, Vol. 57 ›› Issue (3): 108-115.doi: 10.19964/j.issn.1006-4990.2024-0248

• 环境·健康·安全 • 上一篇    下一篇

工业废料磷石膏结晶特征与矿物浮选性能研究

冷曼希1(), 朱钰2, 严继康1, 谢轲1, 邹永洁1   

  1. 1.西南石油大学新能源与材料学院,四川 南充 637001
    2.四川新锂想能源科技有限责任公司,四川 遂宁 629200
  • 收稿日期:2024-05-06 出版日期:2025-03-10 发布日期:2025-03-21
  • 作者简介:冷曼希(1983— ),女,硕士,副教授,研究方向为功能材料的开发;E-mail:49238953@qq.com

Study on crystallization characteristics and mineral flotation performance of industrial waste phosphogypsum

LENG Manxi1(), ZHU Yu2, YAN Jikang1, XIE Ke1, ZOU Yongjie1   

  1. 1. School of New Energy and Materials,Southwest Petroleum University,Nanchong 637001,China
    2. Sichuan New Li-idea Energy Science and Technology Co. ,Ltd. ,Suining 629200,China
  • Received:2024-05-06 Published:2025-03-10 Online:2025-03-21

摘要:

对四川某企业固废磷石膏通过金相显微镜、电子扫描显微镜、反浮选法和Materials Studio软件进行结晶特征、矿物浮选性能及吸附行为研究,为后续磷石膏的除杂与增白,提供理论支撑。磷石膏在显微镜下为淡黄色透明晶体,晶体形状为板状、柱状或菱状。利用电子扫描显微镜(SEM)分析杂质嵌布特征,发现二氧化硅、难溶氟、难溶磷等杂质组分主要分布于磷石膏晶体表面。用煤油、油酸钠和十二胺作为浮选药剂对CaSO4·2H2O、CaHPO4·2H2O、SiO2、CaF2 4种矿物进行浮选,选择出最佳浮选药剂十二胺。在pH为7、十二胺用量为200 g/t的最佳条件下,进行模拟磷石膏原矿浮选,回收率达到83.50%。用Materials Studio软件及CASTEP模块计算磷石膏表面吸附能,得到二水硫酸钙的吸附能为-9 511.19 eV;二水磷酸氢钙的吸附能为-7 294.05 eV;氟化钙的吸附能为-3 935.56 eV;二氧化硅的吸附能为-2 827.94 eV。

关键词: 磷石膏, 浮选剂, 十二胺

Abstract:

In this paper,the crystallization characteristics,mineral flotation performance and adsorption behavior of a solid waste phosphogypsum of a Sichuan enterprise were studied by means of metallographic microscope,SEM,reverse flotation method and Materials Studio software,so as to provide theoretical support for the subsequent impurity removal and whitening of phosphogypsum.Phosphogypsum was light yellow and transparent crystal under microscope,crystal shape was plate,columnar or rhomboid.By means of electron scanning microscope,it was found that silica,insoluble fluorine and insoluble phosphorus were mainly distributed on the surface of phosphogypsum crystal.Four minerals,CaSO4·2H2O,CaHPO4·2H2O,SiO2 and CaF2,were flotation by using kerosene,sodium oleate and dodecylamine as flotation agents,and the best flotation agent-dodecylamine was selected.At optimum pH value of 7 and optimum dosage of dodecylamine of 200 g/t,the recovery rate of phosphogypsum was 83.50%.The surface adsorption energy of phosphogypsum was calculated by using CASTEP module and Materials Studio,and the adsorption energy of calcium sulfate dihydrate was-9 511.19 eV.The adsorption energy of calcium hydrogen phosphate dihydrate was-7 294.05 eV.The adsorption energy of calcium fluoride was-3 935.56 eV.The adsorption energy of silica was-2 827.94 eV.

Key words: phosphogypsum, flotation agent, dodecylamine

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