Brown coal ash removal by the sink method

Technical Report · Thu Oct 26 04:00:00 EST 1939

OSTI ID:6888276

Erb,; Geisler,

Steps were outlined for a flow sheet describing the ash removal process for the production of 1.4 tons of low-temperature carbonization coke per hour. The washing and suspension was accomplished by 400 kg of 30% HCl added to 6.2 tons/hr of crushed, wet, Rhine brown coal. This suspension was mixed, then stirred for 20 minutes, while heavier sand particles sank to a conical collector in the bottom of the apparatus, where sand could be drawn off periodically. The slurry then emptied into a settling clarifier tank where the paste was thickened and the decant was removed. Next, 207 kg of oil and 310 kg more acid were added and mixed thoroughly for 20 minutes in another mixer. This provided intimate mixing for the coal and binding oil, which was sometimes replaced by tar. This coal-oil-HCl emulsion was settled in a clarifier where the decant was recycled. The thickened sludge was filtered in a disc-shaped vacuum filter, and the filtrate was allowed to separate into aqueous and oil layers and the aqueous layer combined with the clarifier recycle. The water was removed from the filter cake in a tubular drier, then reduced to 1 to 3 mm particles by a sieve and roll crusher. Then a mixer insured uniform binding oil distribution before the briquettes were pressed. The final briquette yield was 3.5 tons/hr. The briquettes were then carbonized at low temperature in batches with the capacity of 3.5 tons/hr. This ash removal procedure gave no estimates of effectiveness such as before-and-after compositions, but suggested that a general conversion from a high to a moderate ash level took place. 1 flowsheet

• Research Organization: I.G. Farbenindustrie, A.G., Hoechstadt (Germany)
• OSTI ID: 6888276
• Report Number(s): TOM-286-40-42
• Country of Publication: United States
• Language: German

Related Subjects

01 COAL, LIGNITE, AND PEAT
010401 -- Coal & Coal Products-- Carbonization-- (-1987)
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ACIDIFICATION
ASHES
BRIQUETS
BRIQUETTING
BROWN COAL
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTIONS
CLEANING
COAL
COAL PASTES
COKE
COKING
COMMINUTION
CRUSHING
DECOMPOSITION
DIAGRAMS
ENERGY SOURCES
EQUIPMENT
EXTRACTION
FABRICATION
FILTERS
FILTRATION
FLOWSHEETS
FOSSIL FUELS
FUELS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MEDIUM PRESSURE
MEDIUM TEMPERATURE
MOLDING
NORMAL-MODE ANALYSIS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROCESSING
PRODUCTION
PUMPS
PURIFICATION
RECYCLING
REMOVAL
RESIDUES
SAND
SEPARATION PROCESSES
SOLID FUELS
TAR
WASHING
YIELDS