Briquette product, and process for its production

Patent · Tue Nov 26 04:00:00 EST 1991

OSTI ID:5291176

Davidson, J W; Blackmore, G; Blackmore, G; Komerek, K R; Komerek, R

This patent describes a process for restructuring particulate coal fines without the introduction of extraneous binder material, comprising the steps of: drying coal particle feed material; compressing the material into a constrained briquette form at a pressure in the range 30,000 to 50,000 psi. This patent also describes an apparatus for reconstituting coal from naturally occurring coal fines wet feed material of variable water content, generally in the size range up to 1/16 inch mesh and predominantly particulate 28 mesh to zero into a compacted form possessing adequate crushing strength to withstand bulk handling without substantial damage. It comprises: a high pressure cavity die roll press operable in a pressure range above about 30,000 psi to abut 50,000 psi; gas heating means for producing hot reducing gas at a pressure above atmospheric; dryer means to receive the hot reducing gas and the wet feed material in mutual heat exchange relation therein.

• Assignee: NOV; EDB-92-100849; NOV-92-021382
• Patent Number(s): A; US 5067968
• Application Number: PPN: US 7-607214
• OSTI ID: 5291176
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
BRIQUETS
BRIQUETTING
CARBONACEOUS MATERIALS
COAL
COAL FINES
COAL PREPARATION PLANTS
DRYING
ENERGY SOURCES
FABRICATION
FOSSIL FUELS
FUELS
INDUSTRIAL PLANTS
MATERIALS
MOLDING
PARTICLE SIZE
SIZE
SOLID FUELS