DISSOLUTION KINETICS OF JINHE PHOSPHATE ROCK IN MIXTURE OF SULFURIC AND PHOSPHORIC ACIDS

Li Chengrong; Zhong Benhe; Zhang Yunxiang(Department of Chemical Engineering

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DISSOLUTION KINETICS OF JINHE PHOSPHATE ROCK IN MIXTURE OF SULFURIC AND PHOSPHORIC ACIDS

更新时间：2025-12-16

- DISSOLUTION KINETICS OF JINHE PHOSPHATE ROCK IN MIXTURE OF SULFURIC AND PHOSPHORIC ACIDS
- CIESC Journal Issue 3, (1998)
- 作者机构：
  
  四川联合大学化工系!成都610065,四川联合大学化工系!成都610065,四川联合大学化工系,成都,610065
- 作者简介：
- 基金信息：
- DOI：
  CLC： 643
- Online First：25 June 1998，
  
  Published：25 June 1998
- 稿件说明：
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Li Chengrong, Zhong Benhe, Zhang Yunxiang(Department of Chemical Engineering. DISSOLUTION KINETICS OF JINHE PHOSPHATE ROCK IN MIXTURE OF SULFURIC AND PHOSPHORIC ACIDS[J]. CIESC Journal, 1998, (3).
DOI：

Li Chengrong, Zhong Benhe, Zhang Yunxiang(Department of Chemical Engineering. DISSOLUTION KINETICS OF JINHE PHOSPHATE ROCK IN MIXTURE OF SULFURIC AND PHOSPHORIC ACIDS[J]. CIESC Journal, 1998, (3). DOI：

摘要

参考二水物湿法磷酸的生产工艺条件，进行了金河磷矿在硫、磷混酸中的酸解动力学研究．考察了矿粉粒度、硫酸浓度及反应温度对酸解过程的影响；选用考虑了自阻化因素的德罗兹多夫方程描述酸解过程的动力学；利用修改后的Gioia酸解模型求得了磷矿酸解过程的有效扩散系数．

Abstract

In this paper

with reference to operating conditions of dihydrate Wet-process Phosphoric Acid(WPA)process used conventionally

the effects of the average rock particle size

sulfuric acid concentration and reaction temperature on the dissolution kinetics of Jinhe phosphate rock in a mixture of sulfuric and phosphoric acids were studied in detail experimentally

and consequently a series of dissolution kinetics curves were obtained.The Drozdov equation which takes into account the self-impeding effect is selected for simulating the dissolutin kinetics.With the aid of the Gioias modified mathematical model for the simulation of phosphate rock acidulation

an effective diffusion coefficient for coating on rock particles is calculated.

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