Investigation of Rheological Characteristic of Coal during Plastic Phase

Abstract

It is necessary for the development of high strength coke production technology to make clear the physical properties of coal during plastic phase that governs coke micro and macro structure. So, rheological properties of coal under thermoplastic condition were investigated. Firstly, the viscosity of coking coal under different shear rate was measured by using a modified rotating viscometer we developed. And then experimental results were analyzed based on Non-Newtonian models (Herschel-Bulkley model and Casson model) and different rheological behavior was observed before and after minimum viscosity temperature.