CIESC Journal

• 化工学报 • 上一篇    下一篇

磷酸复杂系统液固相反应动力学(Ⅱ)磷矿颗粒系统酸解动力学实验研究

刘代俊,钟本和,张允湘   

  1. 四川大学化工学院!四川成都610065,四川大学化工学院!四川成都610065,四川大学化工学院!四川成都610065
  • 出版日期:2001-01-25 发布日期:2001-01-25

LIQUID AND SOLID PHASE REACTION KINETICS OF PHOSPHORIC ACID COMPLEX SYSTEM(Ⅱ) EXPERIMENTAL STUDY ON DIGESTION KINETICS OF PHOSPHATE ORE PARTICLE SYSTEM

LIU Daijun,ZHONG Benhe and ZHANG Yunxiang (Chemical Engineering Institute, Sichuan University,Chengdu?610065,Sichuan,China )   

  • Online:2001-01-25 Published:2001-01-25

摘要: (Ⅰ )报已对磷矿颗粒的扩散和反应过程进行了理论探讨 ,在系统研究金河磷矿、晓峰磷矿、开阳磷矿这3种有代表性的磷矿晶体微结构参数、物相组成等物理化学特征的基础上 ,实验研究了这些磷矿中包括杂质在内的反应动力学过程 ,并发现了铁铝杂质在反应中的负温度效应 .采用 (Ⅰ )报得到的动力学方程描述这些过程 ,获得了较满意的结果 ,分形扩散中的特殊现象和扩散中所产生的自相似结构均在实验中获得了证实

Abstract: Based upon the discussion of the diffusion and reaction processes in paper Ⅰ,including general analysis of crystal micro-structure ,substance phase and chemical contents of three kinds of phosphate ores of domestic mine(Jing He,Xiao Feng and Kai Yang),the reaction kinetics process involving phosphoric acid-phosphate ore particles was investigated in an experiment system.As a result,the new negative temperature effect of iron and alumium impurity reaction was discovered.Accompanying these special phenomena in fractal particles ,the self-ordering structrue arising in the diffusion process was demonstrated in the experiments by using scanning electron microscopy and X-ray diffraction analysis.Furthermore,the kinetic process was described by adopting the new model in paper(Ⅰ) ,and satisfactory results were obtained.

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