Abstract
Abstract Coal slurry pipe, being a new type of energy transportation mode, changes of the particle composition and the effect on other parameters are worth studying. Comparison of ring tube test measured data and batch grinding model simulation data shows that batch grinding model can predict the coal particle gradation to a certain extent. The effect of collision and wear of overcurrent components in the centrifugal pump, friction and collision between particles and piping and piping accessories, and initial particle size distribution during hydraulic conveying were also investigated by laboratory studies. Meanwhile, the effect of particle composition change on slurry viscosity, hydraulic resistance and minimum resistance critical velocity was studied based on the experimental data. The experimental and theoretical analysis indicates that the change of slurry particle composition can lead to the change of viscosity, resistance and minimum resistance critical velocity of the slurry. Moreover, based on the previous studies, the calculation model of minimum resistance critical velocity of coal slurry is proposed.
Highlights
In the 1950s, pipeline hydraulic coal transportation served as a mature technology widely applied in underground coal mines of China
The effect of collision and wear of overcurrent components in the centrifugal pump, friction and collision between particles and piping and piping accessories, and initial particle size distribution during hydraulic conveying were investigated by laboratory studies
The batch grinding model can predict the influence of pipeline transportation on the change of coal particle grade to a certain extent
Summary
(Submitted: May 17, 2018 ; Revised: November 28, 2018 ; Accepted: December 18, 2018). Abstract - Coal slurry pipe, being a new type of energy transportation mode, changes of the particle composition and the effect on other parameters are worth studying. The effect of collision and wear of overcurrent components in the centrifugal pump, friction and collision between particles and piping and piping accessories, and initial particle size distribution during hydraulic conveying were investigated by laboratory studies. The effect of particle composition change on slurry viscosity, hydraulic resistance and minimum resistance critical velocity was studied based on the experimental data. The experimental and theoretical analysis indicates that the change of slurry particle composition can lead to the change of viscosity, resistance and minimum resistance critical velocity of the slurry.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
