Open AccessEffect of concentration, size, granularity, shear time and temperature on rhological properties of coal water slurries
Author(s) -
Rishi Jain,
Shreyash Yadav,
Sachin Bisht,
Jagadeeshwar Kodavaty,
Suresh Kumar Yatirajula
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1126/1/012027
Subject(s) - rheology , slurry , coal , coal water , granularity , materials science , shearing (physics) , shear rate , shear (geology) , shear stress , particle size , coal slurry , mineralogy , composite material , chemical engineering , waste management , chemistry , engineering , computer science , operating system
Coal water slurries (CWS) were proposed as a substitute for the fuel oils century ago. As there is a huge demand for energy, it is necessary for us to use such concepts with good understanding of the alternative fuels. As the use of CWS depends on physio-chemical properties of coal and rheological properties of the slurry, coal obtained from Dugda coal washery, Jharkand, India were subjected to examination. These coals are ground and segregated according to the sizes and the samples of CWS were prepared. The prepared samples were tested for their physio-chemical properties first. various samples of coal water slurries were prepared and examined for rheology of the samples by varying their concentration, size and granularity of the particles, shearing time and temperature. A detailed analysis on stress strain relation was analyzed during this study. It is found that the stresses would increase with concentration of CWS when the strain rates are varied. It is found that the size of the particles would play active role in deciding the shear forces when the samples were subjected to varying shear rates with their self assembly. The granularity of the particles in the sample has significant effect in rheological properties of the CWS samples. The temperature has no effect.