Research on leaching rate enhancement and organic matter removal in wet-process phosphoric acid

Changyuan TAO; Xiuxiu WANG; Zuohua LIU; Renlong LIU; Jinhua LUAN

doi:10.11949/0438-1157.20200672

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Research on leaching rate enhancement and organic matter removal in wet-process phosphoric acid

Energy and environmental engineering | 更新时间：2025-11-25

- Research on leaching rate enhancement and organic matter removal in wet-process phosphoric acid
- CIESC Journal Vol. 71, Issue 10, Pages: 4792-4799(2020)
- 作者机构：
  
  1.重庆大学化学化工学院，重庆 400044
  2.重庆大学煤矿灾害动力学与控制国家重点实验室，重庆 400044
  3.重庆地质矿产研究院，重庆 400044
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20200672
  CLC： TQ 126.3
- Received：03 June 2020，
  
  Revised：2020-07-14，
  
  Published：05 October 2020
- 稿件说明：
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陶长元, 王秀秀, 刘作华, 刘仁龙, 栾进华. 湿法磷酸浸出强化及有机质去除研究[J]. 化工学报, 2020, 71(10): 4792-4799

TAO Changyuan, WANG Xiuxiu, LIU Zuohua, LIU Renlong, LUAN Jinhua. Research on leaching rate enhancement and organic matter removal in wet-process phosphoric acid[J]. CIESC Journal, 2020, 71(10): 4792-4799
陶长元, 王秀秀, 刘作华, 刘仁龙, 栾进华. 湿法磷酸浸出强化及有机质去除研究[J]. 化工学报, 2020, 71(10): 4792-4799 DOI： 10.11949/0438-1157.20200672.

TAO Changyuan, WANG Xiuxiu, LIU Zuohua, LIU Renlong, LUAN Jinhua. Research on leaching rate enhancement and organic matter removal in wet-process phosphoric acid[J]. CIESC Journal, 2020, 71(10): 4792-4799 DOI： 10.11949/0438-1157.20200672.

摘要

在湿法磷酸浸出过程中由于部分有机物碳化不彻底，使产品磷酸呈现黑色。本文提出了一种新型的催化氧化湿法磷酸净化技术，即在湿法磷酸浸出过程中引入氧化剂（H

）及催化剂（MnO

），基于转化过程中形成的

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=5545984&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=5545975&type=

6.01133347

2.28600001

和

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=5546000&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=5545993&type=

6.94266701

3.21733332

等过氧化物实现对有机物的去除与浸出过程的强化。重点考察不同反应条件对湿法磷酸浸出率及有机质去除的影响。结果表明，浸出时间为40 min、反应温度为80℃、H

用量为0.08 ml/g、催化剂与磷矿的质量比为0.04时，磷矿浸出率可达96.9%；同时测定得到的TOC去除率达到79%。分析机理可得，H

会与溶液中的H

形成H

·H

过氧化物，MnO

与之发生类Fenton反应，产生大量

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=5546022&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=5546011&type=

6.01133347

2.28600001

，进而将黑色有机物充分氧化为CO

和H

O，打破有机物对磷矿颗粒表面的“包裹”，促进磷酸的浸出和有机物的去除。

Abstract

In the process of wet-process phosphoric acid leaching

the product phosphoric acid appears black due to the incomplete carbonization of some organic matter. A novel type of catalytic oxidation wet-process phosphoric acid purification technology was proposed in this work. During the leaching process

the oxidant (H

) and catalyst (MnO

) was added to form the peroxides such as ·OH and HO

· in the transformation process

which can enhance the removal rate of organic matter and strengthen the leaching rate of phosphate rock. The different reaction conditions that affected the leaching rate of wet-phosphoric acid and the removal of organic matter were investigated. The results indicated that 96.9% of phosphate rock were leached under the optimum conditions of H

dosage 0.08 ml/g

MnO

/P mass ratio of 0.04

80℃ and for 40 min. At the same time

the TOC remove rate reached 79%. The analysis mechanism showed that H

will form H

· H

peroxide with H

in the solution

and MnO

will react with it like Fenton to generate a large amount of ·OH

and then fully oxidized the black organic matter into CO

and H

O. Organic matter “wrapped” on the surface of the phosphate rock is broken by ·OH

which promoted the leaching of phosphoric acid and enhanced the removal of organic matter.

关键词

Keywords

references

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