Coal preparation practice in Western Germany

Technical Report · Thu Mar 07 04:00:00 EST 1946

OSTI ID:6709523

Fraser, T; Driessen, M G

The report was about the German coal preparation industry and it consisted of the following sections: general appraisal, organizations, economic factors, field data on plants, devices, and techniques. In the first section, general preparation practice, jig wash boxes, the heavy medium processes and special coal preparation projects were discussed. The second section was about development and construction, standardization of equipment and guarantees; in the third section, the report talked about price relationships; and in the other two sections, the field data of different plants and the different techniques used by the plants were given. The coal preparation industry in Germany was organized very much as in America. The dominant washing process was the jig which handled 87% to 88% of all the coal washed in the Ruhr area. Fine coal jigs, both with and without feldspar, were used almost to the exclusion of other methods for coal under 8 mm or 10 mm except that dust under 0.75 mm was commonly handled by froth flotation. The 10 mm x 0 was dedusted before washing; therefore it had great advantage in the subsequent dewatering of the coal and clarification of the water. Mechanical developments and dedusting devices included flash dryers, conveyor dryers, the resonance screens, froth breakers, and anti-breakage loading devices. The coal purifying methods which were used to produce very low-ash coal included multiple-stage froth flotation, controlled heavy suspension separation, electrostatic separation, acid extraction of the ash minerals, and tar-oil extraction of the coal matter. Each section in the above was described in detail in the report. It also described the differences in equipment for dedusting and gave a good description of purifying methods. 11 tables, 37 figures.

• Research Organization: Corporate Unverified
• OSTI ID: 6709523
• Report Number(s): TOM-240-256-387
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
012000 -- Coal
Lignite
& Peat-- Mining
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ASHES
CAPACITY
CAPITAL
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
CLEANING
COAL
COAL PREPARATION
COAL PREPARATION PLANTS
COMMINUTION
COMPARATIVE EVALUATIONS
CONCENTRATORS
CONTAINERS
CONTROL
CONVEYORS
COST
CRUSHING
CYCLONE SEPARATORS
DATA COMPILATION
DEMAND FACTORS
DESIGN
DIAGRAMS
DIMENSIONS
DRYERS
DUST COLLECTORS
DUSTS
ECONOMICS
ELECTROSTATIC PRECIPITATORS
ENERGY SOURCES
EQUIPMENT
FILTRATION
FLOTATION
FLOWSHEETS
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
HYDROGENATION
INDUSTRIAL PLANTS
INERTIAL SEPARATORS
INFORMATION
LABOR
MANPOWER
NORMAL-MODE ANALYSIS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARTICLE SIZE CLASSIFIERS
PHYSICAL PROPERTIES
PIPES
POLLUTION CONTROL EQUIPMENT
PROCESS CONTROL
PROCESSING
PUMPS
RADIAL VELOCITY
RECOMMENDATIONS
REMOVAL
RESIDUES
SEPARATION PROCESSES
SIZE
SPECIFICATIONS
STANDARDS
TABLES
VELOCITY
WASHING
WATER
WEIGHT