Research in the area of obtaining of activated alumina. Part 5. Various technological approaches to the process of fine grinding of high-alumina raw materials

M. Trubitsyn, N. Volovicheva, L. V. Furda, V. V. Lisnyak, A. Kurbatov, I. A. Bondareva
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Abstract

The results of studying the process of fine grinding of α-Al2O3 in the presence of polyethylene glycol (PEG) and an antistatic composition are presented. It is shown that the main reason for the agglomeration of fine particles is the effect of the appearance of an electrostatic surface charge. The introduction of PEG prevents the appearance of a «pseudo-viscous grinding medium», removing the excess electrostatic charge on the surface of newly formed ultrafine particles, and also intensifies the process of abrasion of primary alpha-alumina crystals. The antistatic composition successfully neutralizes the surface electrical charge, but does not have the effect of a grinding aid.
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活性氧化铝制备领域的研究。第5部分。高铝原料细磨工艺的各种技术途径
介绍了在聚乙二醇(PEG)和抗静电成分存在下对α-Al2O3进行细磨的工艺研究结果。结果表明,微粒聚集的主要原因是静电表面电荷的出现。PEG的引入防止了“伪粘性研磨介质”的出现,消除了新形成的超细颗粒表面的多余静电电荷,也加剧了初级α -氧化铝晶体的磨损过程。抗静电成分成功地中和了表面电荷,但不具有助磨剂的作用。
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