Inorganic Chemicals Industry >
Identification of colored substances in wet process phosphoric acid leaching slurry
Received date: 2021-03-16
Online published: 2022-03-14
The phosphoric acid leaching slurry was collected in the phosphoric acid production process section.The solution was obtained after dissolving by N,N-Dimethylformamide and n-hexane,the solids obtained by removing soluble phosphoric acid and salts by water washing were used to judge the composition and coloring of small molecule organic matter by gas chromatography-mass spectrometry.The solid samples after washing were identified by XRD and XRF,and the composition of coloring substances in phosphoric acid leaching slurry was determined.The composition and content of organic matter were determined by TG and FT-IR spectrometer.The existence of samples was determined by SEM.The experimental results showed that the main coloring material was a complex composed of FeS2 and organics,its existence form was organic matter incomple-tely encapsulating FeS2.The mass fraction of FeS2 was 10.70%（based on Fe） and the mass fraction of organic matter was 2.39% （of wet based raw phosphoric acid extraction slurry）.
Xianshun WANG , Yan DOU , Qi WANG , Peng CUI , Jun MA , Hao SHEN , Zhiyin ZHENG , Rong LIU . Identification of colored substances in wet process phosphoric acid leaching slurry[J]. Inorganic Chemicals Industry, 2022 , 54(1) : 86 -90 . DOI: 10.19964/j.issn.1006-4990.2021-0150
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