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 。
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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2001年第1期28-34,共7页
CIESC Journal
基金
国家自然科学基金资助项目!(No .2 0 0 46 0 0 1)
关键词
液固反应动力学
磷矿
酸解
负温度效应
磷酸
two phase reaction kinetics,phosphate ore digestion,negative temperature effect,ordering structure
