The ring formation phenomena in a semi-pilot rotary kiln during the Na2CO3 salt-roasting process of vanadium-bearing titaniferous magnetite (VTM) concentrate was investigated. Ring-shaped particle agglomeration attributed to the sticking behavior of the VTM–Na2CO3 blended particles was observed during the salt-roasting process with 15 wt% Na2CO3 at 1323 K (1050℃). This observation is explained by the changes in the thermophysical properties of the blends in conjunction with the pseudo-binary phase diagrams of the VTM concentrate and Na2CO3.

中文翻译：

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含钒钛磁铁矿精矿盐焙烧过程中半中试回转窑中的环形成

研究了含钒钛磁铁矿 （VTM） 精矿 Na2CO3 盐焙烧过程中半中试回转窑中的环形成现象。在 1323 K （1050°C） 下使用 15 wt% Na2CO3 进行盐焙烧过程中，观察到归因于 VTM-Na2CO3 混合颗粒粘附行为的环形颗粒团聚。这一观察结果可以通过混合物热物理性质的变化以及 VTM 精矿和 Na2CO3 的伪二元相图来解释。