Solid-liquid chaotic mixing and leaching enhancement performance in phosphoric acid leaching process

LI Bing; YANG Yi; LIU Zuohua; TAO Changyuan; GU Deyin; XU Chuanlin; WANG Yundong

doi:10.11949/j.issn.0438-1157.20181253

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Solid-liquid chaotic mixing and leaching enhancement performance in phosphoric acid leaching process

Fluid dynamics and transport phenomena | 更新时间：2026-07-24

- Solid-liquid chaotic mixing and leaching enhancement performance in phosphoric acid leaching process
- CIESC Journal Vol. 70, Issue 5, Pages: 1742-1749(2019)
- 作者机构：
  
  1.重庆大学化学化工学院，重庆 401331
  2.中化重庆涪陵化工有限公司，重庆 408100
  3.清华大学化学工程系，北京 100084
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181253
  CLC： TQ 027.2
- Received：22 October 2018，
  
  Revised：2019-01-31，
  
  Online First：24 July 2026，
  
  Published：05 May 2019
- 稿件说明：
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李兵, 杨义, 刘作华, 陶长元, 谷德银, 许传林, 王运东. 湿法磷酸固-液体系混沌混合与浸出强化行为[J]. 化工学报, 2019, 70(5): 1742-1749

LI Bing, YANG Yi, LIU Zuohua, TAO Changyuan, GU Deyin, XU Chuanlin, WANG Yundong. Solid-liquid chaotic mixing and leaching enhancement performance in phosphoric acid leaching process[J]. CIESC Journal, 2019, 70(5): 1742-1749
李兵, 杨义, 刘作华, 陶长元, 谷德银, 许传林, 王运东. 湿法磷酸固-液体系混沌混合与浸出强化行为[J]. 化工学报, 2019, 70(5): 1742-1749 DOI： 10.11949/j.issn.0438-1157.20181253.

LI Bing, YANG Yi, LIU Zuohua, TAO Changyuan, GU Deyin, XU Chuanlin, WANG Yundong. Solid-liquid chaotic mixing and leaching enhancement performance in phosphoric acid leaching process[J]. CIESC Journal, 2019, 70(5): 1742-1749 DOI： 10.11949/j.issn.0438-1157.20181253.

摘要

湿法磷酸浸出过程中，传统刚性搅拌桨的作用方式主要是剪切作用，容易形成对称性流场结构，降低搅拌效率。实验考察了桨叶类型、离底高度、搅拌速度、柔性钢丝绳长度、柔性钢丝直径对磷矿浸出率及最大Lyapunov指数(LLE)的影响。实验结果表明：刚柔组合桨通过刚-柔-流的耦合作用，改善流场的结构，提高了流体混沌混合效果。当搅拌转速225 r/min，浸出时间120 min，离底高度

/4，柔性钢丝绳直径

= 0.42

，柔性钢丝绳长度

=1.3

时，刚柔组合桨的最大Lyapunov指数达到0.09071，磷矿浸出率提高了10.8%。另外，在相同的功耗(

=9890 W/m

)条件下，刚柔组合桨使反应器内的悬浮均匀度和渣中磷含量分别降低了40.8%和17.67%，有效地改善了晶体的形貌，提高了磷石膏的过滤性能，强化了颗粒的混合与浸出。

Abstract

In the process of wet-process phosphoric acid leaching

the mode of action of the traditional rigid stirring paddle is mainly shearing

and it is easy to form a symmetrical flow field structure and reduce the stirring efficiency. The effects of impeller type

impeller off-bottom clearance

stirring speed

length of flexible wire

diameter of flexible wire on leaching rate and largest Lyapunov exponent (LLE) were investigated experimentally. The results showed that rigid-flexible impeller changed structure of flow field and improved the fluid chaos mixing degree through coupling interaction of rigid-flexible-fluid. At leaching time 120 min

agitation speed 225 r/min

off-bottom clearance

diameter of wire

=0.42

and length of wire

=1.3

LLE of rigid-flexible impeller reached 0.9071 and leaching rate of phosphate rock increased by 10.8%. At the same power consumption (

=9860 W/m

)

the suspension uniformity and the slag phosphorus content were reduced by 40.8% and 17.67% with the rigid-flexible impeller

respectively. In addition

the morphology of the crystal was improved when the rigid-flexible impeller was used. Meanwhile

the filtration performance of phosphogypsum was enhanced.

关键词

Keywords

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