Synchrotron X-ray micro-computed tomography imaging of solid bridges between potash particles near contact points  

作　　者：Mojtaba Nabipoor Hassankiadeh Mohammad Mehdi Heydari Carter Blocka Lifeng Zhang 

机构地区：[1]Department of Chemical and Biological Engineering,University of Saskatchewan,SK,S7N 5A9,Saskatoon,Canada

出　　处：《Particuology》2024年第9期24-29,共6页颗粒学报（英文版）

摘　　要：Chemical fertilizers,such as potash,have a strong tendency to cake when exposed to humidity.In this work,a novel synchrotron-based X-ray tomography 3D-imaging technique was for the first time employed to investigate the solid bridge formation from 2D and 3D perspectives.Image processing and a theoretical model were presented to demonstrate recrystallization near contact points between potash particles during a conventional drying process.The effect of initial moisture content on the water activity of surface surrounding the contact points was investigated.The results showed that by increasing the moisture content of particles(3%–5%),the dissolution of sylvite increased and the solid bridge length between potash particles was enlarged from 28μm to 44μm due to supersaturation conditions.In addition,the external porosity of potash particles at the end of drying process decreased from 25.3%to 19.5%for 3%and 5%moisture content,respectively.

关 键 词：Potash fertilizer Solid bridge RECRYSTALLIZATION Synchrotron X-ray micro-CT imaging Drying process 

分 类 号：TQ02[化学工程] TP391.41[自动化与计算机技术—计算机应用技术]