天然珪砂のボールミル粉砕・分級シミュレーションによる粒子径設計およびスケールアップへの応用

摘要

天然珪砂は建築材料，ガラス原料等の分野で使用されている。近年は，その粒子径（分布）のコントロールに対する要望が高まり，珪砂の粉砕・分級プロセスの確立が必要となった。過去の研究では，粉砕速度論及び分級効率モデル式を用いた閉回路粉砕工程における数値解析に関する検討が行われてきた。%Silica sand is widely used as a building material and as raw material for glass, but it is necessary to control the particle size or the particle size distribution of silica sand depending on the industrial field applied. It is important to develop a technique to design particle size and to apply a scale-up method for the comminution and classification processes. In this study, a simulation was conducted by applying parameters of comminution kinetics and the partial classification efficiency equation to closed-circuit grinding process. A scale-up technique was established from the relations between the parameters of the comminution kinetics and the mill diameter. In this way, we could obtain the required product size distribution by this simulation method and this scale-up technique.