Since the vanadium oxide is softer than vanadium carbide, it is easily reduced to fine particles in the step of mixing by means of a ball mill in raw-material preparation.
由于氧化钒 与碳化钒相比较为柔软，因此在配制原料时在采用球磨机进行混合的步骤中 容易进行微粒化。
The kinetics of leaching process of zinc oxide ore is researched and it indicates that diffusion is the rate controlling step.
对氧化锌矿浸出过程动力学进行了研究，结果表明，扩散是浸出的速度控制步骤。
For the route of selective separation and enrichment with sodium oxide, it is very difficult for one-step route to produce quite pure enriched slag.
对于钠系选择性分离富集路线，采用一步调渣法路线难以取得较高纯度的富钛渣。
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