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 ›› 2022, Vol. 54 ›› Issue (1): 86-90.doi: 10.19964/j.issn.1006-4990.2021-0150

• 化工分析与监测 • 上一篇    下一篇

湿法磷酸浸提料浆中着色物质的鉴别

王现顺1(),窦焰1(),王琪1,崔鹏1,马俊2,沈浩2,郑之银2,刘荣2   

  1. 1.合肥工业大学化学与化工学院,安徽合肥 230009
    2.安徽六国化工股份有限公司
  • 收稿日期:2021-03-16 出版日期:2022-01-10 发布日期:2022-03-14
  • 作者简介:王现顺(1998— ),男,硕士研究生,主要研究方向为矿物资源综合利用;E-mail: 2018170364@mail.hfut.edu.cn

Identification of colored substances in wet process phosphoric acid leaching slurry

WANG Xianshun1(),DOU Yan1(),WANG Qi1,CUI Peng1,MA Jun2,SHEN Hao2,ZHENG Zhiyin2,LIU Rong2   

  1. 1. School of Chemistry and Chemical Engineer,Hefei University of Technology,Hefei 230009,China
    2. Anhui Liuguo Limited Liability Company
  • Received:2021-03-16 Published:2022-01-10 Online:2022-03-14

摘要:

收集磷酸生产过程中的磷酸浸提料浆,通过N,N-二甲基甲酰胺、正己烷溶解得到溶液,水洗脱除可溶性磷酸及盐类后得到固体。采用气相色谱-质谱联用仪(GC-MS)判断小分子有机物组成及着色情况;利用X射线衍射(XRD)、X射线荧光光谱(XRF)表征手段,对水洗后固体样品进行鉴定,确定磷酸浸提料浆中着色物质的组成;利用热重和红外光谱对有机质的组成及含量进行测定;采用扫描电子显微镜对样品的存在状态进行表征。研究表明,磷酸浸提料浆中主要着色物质为二硫化铁与有机质组成的复合体,其赋存状态为有机质不完全包裹二硫化铁的形式,其中二硫化铁质量分数为10.70%(以铁元素计),有机质质量分数为2.39%(以湿基计)。

关键词: 磷酸浸提料浆, 着色物质, 不完全包裹

Abstract:

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).

Key words: phosphoric acid leaching slurry, coloring substances, incompletely wrapped

中图分类号: