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Occurrence of the Impurities in Phosphorus Rock and the Research of Acidolysis Process
Li Xu1,2; Zhu Gan-yu3,4; Gong Xiao-kang1; Li Shao-peng3,4; Xu Wei1; Li Hui-quan3,4,5
2019-04-01
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
ISSN1000-0593
Volume39Issue:4Pages:1288-1293
AbstractIn the process of wet-process phosphoric acid, the impurities in the mineral have great effects on the crystallization of calcium sulfate and restrict the utilization of phosphogypsum. Choosing the typical low-grade phosphorus rock in Hubei province of China as the material, the types and contents of main impurities in phosphorus rock and phosphogypsum have been analyzed through X-ray photoelectron spectroscopy, scanning electron microscopy, and EDS. The main changes of the impurities have been evolved in wet-process phosphoric acid. The results show that fluorapatite and quartz are the main phases in phosphorus rock. The highest impurity components are silicon, aluminum, fluorine, and magnesium. Silicon exists in silica and calcium silicate, and fluorine is all in fluorapatite, and aluminum exists in different kinds of aluminosilicate, and most of magnesium exists as MgF2. Calcium reacts with sulfuric acid to form gypsum through acidolysis reaction. Silicon mainly remains in solid phase. Most of aluminum, fluorine, and magnesium decompose into liquid phosphoric acid. Silica still remains in phosphogypsum, and calcium silicate dissolves in acid solution. The compound comprised of aluminum, silicon and phosphorus forms in acidolysis process. Fluorine is mainly in silicofluoride. Most of MgF2 dissolve into solution, and remaining part of Mg in phosphogypsum mainly exists as magnesium silicate. Through the research of occurrence of impurities, the system change may be better acknowledged in the process, and it can provide a basis for the investigation and control of phosphogypsum crystallization.
KeywordX-ray photoelectron spectroscopy Impurity Occurrence Phosphorus rock Acidolysis
DOI10.3964/j.issn.1000-0593(2019)04-1288-06
Language英语
WOS KeywordCALCIUM-SULFATE DIHYDRATE ; X-RAY PHOTOELECTRON ; SIMULATED CONDITIONS ; CRYSTALLIZATION ; MAGNESIUM
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000466450300047
PublisherOFFICE SPECTROSCOPY & SPECTRAL ANALYSIS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28260
Collection中国科学院过程工程研究所
Corresponding AuthorLi Hui-quan
Affiliation1.Yidu Xingfa Chem Co Ltd, Yidu 443311, Peoples R China
2.Hubei Xingfa Chem Grp Co Ltd, Yichang 443007, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
5.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li Xu,Zhu Gan-yu,Gong Xiao-kang,et al. Occurrence of the Impurities in Phosphorus Rock and the Research of Acidolysis Process[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2019,39(4):1288-1293.
APA Li Xu,Zhu Gan-yu,Gong Xiao-kang,Li Shao-peng,Xu Wei,&Li Hui-quan.(2019).Occurrence of the Impurities in Phosphorus Rock and the Research of Acidolysis Process.SPECTROSCOPY AND SPECTRAL ANALYSIS,39(4),1288-1293.
MLA Li Xu,et al."Occurrence of the Impurities in Phosphorus Rock and the Research of Acidolysis Process".SPECTROSCOPY AND SPECTRAL ANALYSIS 39.4(2019):1288-1293.
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