硅酸盐体系的化学平衡:(3)反应动力学

通过具体实例,简要介绍了矿物材料学研究中有关反应动力学研究的基本原理,给出了对硅酸盐体系若干典型过程的反应动力学研究结果,包括:(1)高铝粉煤灰-Na2CO3体系的中温烧结反应和钾长石-石膏-碳酸钙体系钾长石的热分解反应;(2)KA lS i3O8-Ca(OH)2-H2O体系钾长石水热分解-雪硅钙石晶化反应;(3)S iO2-A l2O3-CaO体系微晶玻璃的β硅灰石晶化反应;(4)13X微孔分子筛和MCM-41介孔分子筛对Hg2+的吸附反应。反应动力学研究成果可望对矿物材料制备实验方案优化、工业生产过程的条件控制以及改进矿物材料性能提供理论指导。

Chemical Equilibrium in Silicate Systems: Part 3, Reaction Kinetics

The basic principles of reaction kinetics in mineral materials science were briefly reviewed.The experimental and theoretical approaches to the reaction kinetics of typical processes in silicate systems were performed,including(1) sintering reactions in the system of high-alumina flyash-sodium carbonate at intermediate temperature,and thermal decomposition of K-feldspar in the system of potassium feldspar-gypsum-calcium carbonate;(2) hydrothermal decomposition of K-feldspar and crystallizing reaction of tobermorite in the system of KAlSi_(3)O_(8)-Ca(OH)_(2)-H_(2)O;(3) crystallizing reaction of β-wollastonite from glass-ceramic in the system of SiO_(2)-Al_(2)O_(3)-CaO;and (4) adsorption reactions to Hg~(2+) in polluted water by both micro-and meso-porous molecular sieves of 13X type zeolite and MCM-41 materials,respectively.Approaches to reaction kinetics for the processes in silicate systems are in theory of significances for optimizing experimental scheme of preparing mineral(materials),improving processing control in industry,and enhancing the properties of mineral materials products.