Inorganic Chemicals Industry >
Study on purification process of phosphogypsum by reverse flotation
Received date: 2023-06-21
Online published: 2024-05-15
In order to solve the problem of low whiteness and the high silica content of phosphogypsum，the experimental study on removing organic matter and silicate in phosphogypsum was carried out by using single reverse flotation.SEM and EDS analysis were conducted on gypsum after reverse flotation with CM reagent（organic ammonium containing functional groups）.The results showed that the flotation performances of CM reagent were not significantly different at pulp pH ranging from 1.2 to 6.5.CM reagent had better purification effect on phosphogypsum compared with 2# oil.When the pH of pulp was 3.5 and the dosage of CM reagent was 250 g/t，the calcium sulfate dihydrate content of gypsum in concentrate was 91.23% and SiO2 content was decreased from 7.6% to 1.89%.The yield of concentrate and the recovery of calcium sulfate dihydrate was 89.53% and 95.08% respectively.The whiteness of concentrate after drying at 45 ℃ was 58%.CM reagent had better removal effect on silicate and organic matter on phosphogypsum surface.The Zeta potential test showed that CM agent not only produced electrostatic adsorption with silicate material in the pulp，but also formed hydrogen bond with it，which improved the selectivity of the agent.The use of CM reagent through a single reverse flotation process had achieved good beneficiation index，laying the foundation for phosphogypsum resource utilization.
Key words： phosphogypsum; reverse flotation; purification; desilication
DENG Fuli , XIA Zhixiang , LONG Bingwen , ZHANG Yi , DAI Yafen , WANG Bin , DING Yigang . Study on purification process of phosphogypsum by reverse flotation[J]. Inorganic Chemicals Industry, 2024 , 56(5) : 115 -120 . DOI: 10.19964/j.issn.1006-4990.2023-0336
| 1 | 崔荣政，白海丹，高永峰，等.磷石膏综合利用现状及“十四五”发展趋势［J］.无机盐工业，2022，54（4）：1-4. |
| CUI Rongzheng， BAI Haidan， GAO Yongfeng，et al.Current situation of comprehensive utilization of phosphogypsum and its development trend of 14th Five-Year Plan［J］.Inorganic Chemicals Industry，2022，54（4）：1-4. | |
| 2 | 彭家惠，张家新，万体智，等.磷石膏预处理工艺研究［J］.重庆建筑大学学报，2000，22（5）：74-78，94. |
| PENG Jiahui， ZHANG Jiaxin， WAN Tizhi，et al.Study on the pretreatment technology of phosphogypsum［J］.Journal of Chongqing Jianzhu University，2000，22（5）：74-78，94. | |
| 3 | 顾青山，林喜华，赵士豪，等.不同预处理工艺对磷石膏性能的影响［J］.无机盐工业，2022，54（4）：17-23. |
| GU Qingshan， LIN Xihua， ZHAO Shihao，et al.Effect of different pretreatment processes on properties of phosphogypsum［J］.Inorganic Chemicals Industry，2022，54（4）：17-23. | |
| 4 | 彭家惠，万体智，汤玲，等.磷石膏中的有机物、共晶磷及其对性能的影响［J］.建筑材料学报，2003，6（3）：221-226. |
| PENG Jiahui， WAN Tizhi， TANG Ling，et al.Organic matters and P2O5 in crystal lattice and their influence on properties of phosphogypsum［J］.Journal of Building Materials，2003，6（3）：221- 226. | |
| 5 | 马林转，宁平，杨月红，等.磷石膏预处理工艺综述［J］.磷肥与复肥，2007，22（3）：62-63. |
| MA Linzhuan， NING Ping， YANG Yuehong，et al.Review on the technology of phosphogypsum pretreatment［J］.Phosphate & Compound Fertilizer，2007，22（3）：62-63. | |
| 6 | 严超，彭秋桂，朱淼，等.磷石膏综合利用及除杂方法综述［J］.磷肥与复肥，2023，38（2）：27-33. |
| YAN Chao， PENG Qiugui， ZHU Miao，et al.Comprehensive utilization and impurity removal methods of phosphogypsum［J］.Phosphate & Compound Fertilizer，2023，38（2）：27-33. | |
| 7 | 黄照昊，罗康碧，李沪萍.磷石膏中杂质种类及除杂方法研究综述［J］.硅酸盐通报，2016，35（5）：1504-1508. |
| HUANG Zhaohao， LUO Kangbi， LI Huping.Types of impurity in phosphogypsum and the method of removing impurity research review［J］.Bulletin of the Chinese Ceramic Society，2016，35（5）：1504-1508. | |
| 8 | 杜明霞，王进明，董发勤，等.磷石膏资源化利用研究进展［J］.矿产保护与利用，2020，40（3）：121-126. |
| DU Mingxia， WANG Jinming， DONG Faqin，et al.Research progress on resource utilization of phosphogypsum［J］.Conservation and Utilization of Mineral Resources，2020，40（3）：121-126. | |
| 9 | 代典，余学军，潘志权.浮选-化学法联用处理磷石膏制备高纯石膏［J］.非金属矿，2020，43（1）：44-48. |
| DAI Dian， YU Xuejun， PAN Zhiquan.Flotation-chemical method for treating high-purity gypsum with phosphogypsum［J］.Non-Metallic Mines，2020，43（1）：44-48. | |
| 10 | 张利珍，吕子虎，张永兴，等.磷石膏提质降杂实验研究［J］.无机盐工业，2021，53（6）：171-173，184. |
| ZHANG Lizhen， Zihu Lü， ZHANG Yongxing，et al.Experimental study on improving quality and reducing impurity of phosphogypsum［J］.Inorganic Chemicals Industry，2021，53（6）：171-173， 184. | |
| 11 | 王进明，董发勤，王肇嘉，等.磷石膏浮选增白净化新工艺研究［J］.非金属矿，2019，42（5）：1-5. |
| WANG Jinming， DONG Faqin， WANG Zhaojia，et al.Study on new technology of phosphogypsum whitening and purification by flotation［J］.Non-Metallic Mines，2019，42（5）：1-5. | |
| 12 | 徐路芸.磷石膏中有机物含量测定方法的研究［J］.化工管理，2016（19）：213-214. |
| XU Luyun.Study on determination method of organic matter content in phosphogypsum［J］.Chemical Enterprise Management，2016（19）：213-214. | |
| 13 | 徐廷航.中低品位胶磷矿反浮选脱硅捕收剂的合成与应用［D］.武汉：武汉工程大学，2021. |
| XU Tinghang.Synthesis and application of desiliconization collector for reverse flotation of middle and low grade collophane［D］.Wuhan：Wuhan Institute of Technology，2021. |
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