Preparation and analyses of low-rank coals for combustion applications. Third quarterly report, April 1, 1985-June 30, 1985

Technical Report · Thu Aug 01 04:00:00 EDT 1985

OSTI ID:5104786

Smit, F J; Maas, D J

The bench-scale laboratory development reported in the 2nd Quarterly Report pointed toward a process combining a number of steps as the way toward producing low-ash, low-sodium micronized slurry fuel. The steps were (a) physical cleaning, (b) acid treatment, (c) hot-water drying (HWD), and (d) micronizing/slurry preparation. Since then, laboratory experiments have been made combining these process steps. A quantity of 1/2'' x 0 Eagle Butte coal was physically cleaned by heavy-liquid separation at a specific gravity of 1.4 for use in these experiments. This clean coal contained 4.71% ash. AMAX R and D has had good results using a stirred ball mill for preparing micronized coal-water slurry fuel and specified these mills in a conceptual design for a gas-turbine fuel manufacturing plant. This appears to be true for low-rank coal as well. Good results were achieved during a trial run on Eagle Butte coal in a Draiswerke Perlmill. Over 99% of the ground coal passed through a 30-micrometer opening sieve. Even finer grinds are possible at reduced feed rates. Several alternatives were considered for preparing the dry powder fuel efficiently so that realistic information would be available when designing a conceptual plant processing LRC. 2 refs., 11 tabs., 4 tabs.

• Research Organization: AMAX Extractive Research and Development, Inc., Golden, CO (USA); North Dakota Univ., Grand Forks (USA). Energy Research Center
• DOE Contract Number: AC18-84FC10623
• OSTI ID: 5104786
• Report Number(s): DOE/FC/10623-1931; ON: DE86000872
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
014000 -- Coal
Lignite
& Peat-- Combustion
ALKALI METALS
CALORIFIC VALUE
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COAL
COAL PREPARATION
COAL RANK
COMBUSTION
COMBUSTION PROPERTIES
DATA
DISPERSIONS
DISSOLUTION
DRYING
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUEL SLURRIES
FUELS
GRINDING MACHINES
HEAVY MEDIA SEPARATION
INFORMATION
LEACHING
MACHINE TOOLS
MASS BALANCE
MATERIALS
METALS
MIXTURES
NUMERICAL DATA
OXIDATION
REMOVAL
SEPARATION PROCESSES
SLURRIES
SODIUM
SUSPENSIONS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TOOLS
VISCOSITY