Oxidation of magnetite grains is divided into tow stages, according to temperature, and iron ion diffuses at lower temperature and diffusion amount of oxygenic ion increases at higher temperature.
磁铁矿颗粒氧化按温度划分为两段，在较低温度下主要是铁离子扩散，较高温度下氧离子扩散的扩散能力增强。
2
Based on experiments, the diffusion mechanism and influential factor of selective uranium separation and acids recovery with ion exchange diffusion dialysis membranes are introduced.
通过初步试验，探讨了用离子交换扩散渗析膜有选择性地回收酸分离铀的机理及影响因素。
3
The results show that oxidizing mechanism of the heater tube is mainly diffusion of metal ion passing through oxide and its reaction at the oxide-gases boundary.