Brown coal ash removal by the sink method

Technical Report · Thu Oct 26 00:00:00 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
ASHES
REMOVAL
BROWN COAL
BRIQUETTING
CARBONIZATION
CRUSHING
PURIFICATION
COAL PASTES
ACIDIFICATION
FILTRATION
COKE
PRODUCTION
SAND
BRIQUETS
COAL
COKING
EQUIPMENT
EXTRACTION
FILTERS
FLOWSHEETS
HYDROCHLORIC ACID
MEDIUM PRESSURE
MEDIUM TEMPERATURE
NORMAL-MODE ANALYSIS
OILS
PROCESSING
PUMPS
RECYCLING
SEPARATION PROCESSES
TAR
WASHING
YIELDS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CLEANING
COMMINUTION
DECOMPOSITION
DIAGRAMS
ENERGY SOURCES
FABRICATION
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MOLDING
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
RESIDUES
SOLID FUELS
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage
010401 - Coal & Coal Products- Carbonization- (-1987)
010402 - Coal
Lignite
& Peat- Purification & Upgrading