Enhanced dissolution of minerals: stored energy, amorphism and mechanical activation
Enhanced dissolution of minerals: stored energy, amorphism and mechanical activation
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DOI：
10.1016/s0892-6875(01)00151-0
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发表时间：
2001-11
影响因子：
4.8
通讯作者：
D. Tromans;J. Meech
中科院分区：
文献类型：
--
作者：
D. Tromans;J. Meech
本文对细磨矿物机械活化溶解现象中储能的来源和作用进行了理论评价。随着粒度的减小，矿物的机械行为的变化进行检查，导致储存的能量的产生和保留的晶体缺陷（位错）在延长研磨的治疗。无定形和多晶现象的发展被认为是晶格周期性降低的直接结果，晶格周期性降低与位错积累增加有关。储存的能量的定量估计，并用于量化溶解动力学的变化方面的溶解活化能降低，因此，增加溶解的相对速率。
A theoretical evaluation of the origin and role of stored energy in the phenomenon of mechanically-activated dissolution of finely milled minerals has been undertaken. The changing mechanical behaviour of minerals with decreasing particle size is examined, leading to the treatment of stored energy in terms of the generation and retention of crystalline imperfections (dislocations) during extended milling. Development of amorphism, and polymorphism, is treated as a direct consequence of decreased periodicity in the crystal lattice that is associated with an increased accumulation of dislocations. Quantitative estimates of stored energy are presented and used to quantify changes in dissolution kinetics in terms of a decreased activation energy of dissolution and hence, an increase in the relative rate of dissolution.