Abstract
The formulation and processing technology of black powder has changed little since its discovery by the Chinese over a thousand years ago. This paper outlines various tasks involved in the development of a new formulation along with a novel continuous processing technology for the state-of-the-art manufacture of black powder. These tasks included Thermo Gravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC) analysis, and the characterization of various material functions including temperature, wall shear stress dependent shear viscosity, extrudate swell, flow instability and wall slip behavior of the black powder formulation, the simulation of the coupled flow and heat transfer occurring in the twin screw extruder, the design of the die employing FEM calculations, and validation experiments using a thermal imaging camera and a well-instrumented twin screw extruders. Using these characterization and simulation capabilities, the new manufacturing process for the live reformulated black powder formulation was successfully demonstrated over a relatively short duration of time.
Original language | English |
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Pages | 3093-3147 |
Number of pages | 55 |
State | Published - 2004 |
Event | 2004 AIChE Annual Meeting - Austin, TX, United States Duration: 7 Nov 2004 → 12 Nov 2004 |
Conference
Conference | 2004 AIChE Annual Meeting |
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Country/Territory | United States |
City | Austin, TX |
Period | 7/11/04 → 12/11/04 |