A phenomenological description of moisture capacity of iron ores--颗粒学报PARTICUOLOGY

Lv, X., Yuan, Q., Bai, C., Huang, X., & Lei, L. (2012). A phenomenological description of moisture capacity of iron ores. Particuology, 10(6), 692–698. https://doi.org/10.1016/j.partic.2011.08.008

A phenomenological description of moisture capacity of iron ores

Xuewei Lv^*, Qiugang Yuan, Chenguang Bai, Xiaobo Huang, Lei Lei

School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

10.1016/j.partic.2011.08.008

Volume 10, Issue 6, December 2012, Pages 692-698

Received 12 April 2011, Revised 9 August 2011, Accepted 25 August 2011, Available online 15 September 2012.

E-mail: lvxuewei@163.com

Highlights

► The non-pore model explains moisture capacity increases with decreasing particle size.

► The pore model indicates the volume of water in the closed pores is relatively little.

► The model predicts the moisture capacity well.

Abstract

Moisture capacity of iron ore, defined as its ability to hold water, has been found to be affected by its particle size and chemical composition. To explain this phenomenon, mathematical model was developed on the basis of particle size, specific surface area, pore properties and contact angle between the iron ore and water. The specific surface area and the pore volume of iron ores were measured to validate the model, and parametric studies were carried out to investigate the effects of these factors, showing that particle size and surface area of the iron ore and thickness of the water film are the principal factors determining the moisture capacity. The model gave reasonable explanation of the phenomenon that moisture capacity increases with decreasing particle size. A correlation developed can well predict the moisture capacity of iron ores. Deviations between measurements and calculations were analyzed.

Graphical abstract

Keywords

Mathematical modelIron ore; Moisture capacity; Water content; Granulation

文章导读