Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

Yazarlar: Diler KATIRCIOĞLU BAYEL

Konular:Mühendislik

DOI:10.28948/ngumuh.684618

Anahtar Kelimeler:Stirred media mill,Dry grinding,Talc,Box- Behnkdesign,Optimization

Özet: This article evaluates the effects of operating parameters on dry grinding of talc with a stirred media mill. A three-level Box-Behnken design was used for the purpose of examining the impacts of four independent factors, including the stirrer speed, solid ratio, media filling ratio, and the media size distribution on the reduction ratio. For the purpose of establishing an empirical correlation between operating parameters and responses, a series of experiments were carried out. Variance analysis showed quite a good value for reduction ratio (R2=0.952). According to the software solutions, the optimum conditions for maximizing the reduction ratio were obtained to be 599 rpm for stirrer speed, 0.07 for solid ratio, 65.58% for media filling ratio, and at maximum level of media size distribution. To verify the improvement of grinding, verification tests were performed two times using the above-mentioned optimum conditions and an average reduction ratio of 3.29 was obtained. This average reduction ratio value obtained was greater than those obtained in the 29 tests. The impacts of grinding on structural characteristics of talc particles were characterized by XRD analysis. XRD measurements indicated that any change was not observed in the peak areas of ground talc specimens compared to the untreated talc specimen.

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