NASA NTRS · 19780005313
Coal extrusion in the plastic state
Abstract
Continuous feeding of coal in a compressing screw extruder is described as a method of introducing coal into pressurized systems. The method utilizes the property of many bituminous coals of softening at temperatures from 350 to 425 C. Coal is then fed, much in the manner of common thermoplastics, using screw extruders. Data on the viscosity and extruder parameters for extrusion of Illinois No. 6 coal are presented.
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England, C., Ryason, P. R.. 1977-09-15. Coal extrusion in the plastic state. https://ntrs.nasa.gov/citations/19780005313
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