Analysis of grinding in a spiral jet mill. Part 2: Semi-batch grinding

被引：3

作者：

Dhakate, Mahesh M. ^{[1
]}

Joshi, Jyeshtharaj B. ^{[2
,3
,4
]}

Khakhar, D. V. ^{[1
]}

机构：

[1] Indian Inst Technol, Mumbai 400076, India

[2] Inst Chem Technol, Mumbai 400019, India

[3] Homi Bhabha Natl Inst, Mumbai 400094, India

[4] UPL Ltd, Mumbai 400051, India

来源：

CHEMICAL ENGINEERING SCIENCE | 2022年 / 253卷

关键词：

Air jet mill; Semi-batch milling; Particle size distribution; Population balance model; CLASSIFICATION;

D O I：

10.1016/j.ces.2022.117544

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The breakage and classification of particles ina spiral air jet mill, operated ina semi-batch mode, is studied for varying operating conditions. The particle size distributions of the product leaving the mill and the material inside the mill are measured, along with the mass in the mill. The median particle size of the product is found to be unchanged with inlet jet pressure at about 5 lm but increases with holdup to about 7.5 lm. At low pressures and high holdups, the classification is imperfect and a significant fraction of large particles, in the size range 150-350 lm, exit in the product. The mass flux from the mill increases with both pressure and holdup and an empirical expression is given to calculate it. A population balance model is presented, which predicts size distributions, mean sizes and mass flux from the mill, in agreement with the measurements. (c) 2022 Elsevier Ltd. All rights reserved.

引用

页数：13