Mesoscopic Mechanism of Fluidization for Bulk Iron Ore Concentrates Based on Model Test

doi:10.11908/j.issn.0253-374x.2015.07.009

Home > Archive>Volume 43, Issue 7, 2015 >1019-1024. DOI:10.11908/j.issn.0253-374x.2015.07.009

Mesoscopic Mechanism of Fluidization for Bulk Iron Ore Concentrates Based on Model Test
DOI:
                        10.11908/j.issn.0253-374x.2015.07.009
                    
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                        JIAN QiweiJIAN Qiwei
College of Civil Engineering, Tongji University, Shanghai 200092, China; College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
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LI NingLI Ning
College of Civil Engineering, Tongji University, Shanghai 200092, China; 2. College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
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ZHOU JianZHOU Jian
College of Civil Engineering, Tongji University, Shanghai 200092, China
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LI ChenLI Chen
College of Civil Engineering, Tongji University, Shanghai 200092, China; 2. College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
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Clc Number:TU411
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Abstract:

A shaking table model test was carried out to study the mesoscopic mechanism of fluidization for iron ore concentrates in bulk under dynamic loading. By means of micro visualization system, meso evolutions of granular fabric were investigated including orientation of particle long axis, average coordination numbers and porosity. And the interaction between particles and water during the fluidization was analyzed. Then, the connection between meso mechanism and macro phenomenon was discussed. The results show that the water transfer, namely, the rising of water level, is important in the fluidization of iron ore concentrates. The mesoscopic fabric of iron ore concentrates, which is consistent with macro phenomenon, is an important parameter for the control of macroscopic mechanical behavior of iron ore concentrates.

Key words:iron ore concentrates; fluidization; meso fabric; coordination number; model test

Reference

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JIAN Qiwei, LI Ning, ZHOU Jian, LI Chen. Mesoscopic Mechanism of Fluidization for Bulk Iron Ore Concentrates Based on Model Test[J].同济大学学报(自然科学版),2015,43(7):1019~1024

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Received:June 18,2014
Revised:April 29,2015
Adopted:March 31,2015
Online: July 13,2015
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