Feasibility of recovering metals from associated slags
The associated mineral ore accompanying Valuable Metal Compounds (VMC) have been usually treated in a smelting furnace ,such as Blast Furnace, Reverberatory, Blowing Furnace, hence the VMC were mostly concentrated into the molten associated slags and separated from liquid metals. So the associated slags become an important man-made resources (Table I), in which the VMC exist dispersively in various mineral phases with fine grain size1–4. Due to complex mineralogy and very fine mineral dissemination of the associated slags, it is difficult to recovery the VMC from the slags by metallurgical or mineral process conventionally . Based on several case studies in laboratory and practices in pilot plant on the associated slags , there occur a feasibility to recovery the VMC from the slags by a new process-Selective Precipitation Technique (SPT) on which three continuous steps are involved (in Figure 1).
Crystallization of MgO–B2O3–SiO2 Slag Observed by In Situ TEM
Abstract Transmission electron microscopy (TEM) observation of in situ heated MgO–B2O3–SiO2 slag allowed the description of its dynamic crystallization process. The crystallization processes are constituted by two steps: (i) phase separation and (ii) nucleation and growth of 2MgO · B2O3 crystal precipitated prior to 3MgO · B2O3. The crystallization processes are sensitive to the electron beam. In electron irradiated regions, the phase separation occurred at 300 °C, however, the phase separation was observed in the electron non-irradiated region at about 750 °C.
SR topography of plastically deformed Fe-Si bicrystals - observation in situ and post mortem
SR reflection topography was applied to study the interaction of slip dislocations with the grain boundaries in Fe-4at%Si bicrystals deformed by compression. Three experimental settings with either a white or monochromatic beam were used and the corresponding orientation contrast analysed. Dislocation transmission through the grain boundary was observed in bicrystals with favourable geometry of the slip systems.