Coke manufacturing process. [5 claims]

Patent · Tue Jul 26 04:00:00 EDT 1977

OSTI ID:7219391

Deruelle, J; Penet, O

Pulverulent coke and granular reactive coke are produced, respectively, from fines and grains of coal of grades which are not normally usable for coking, containing more than 15 percent of volatile matter and having a swelling index between 1 and 8, by carbonization between 600/sup 0/C and 1100/sup 0/C, wherein combustion air in excess of that which would be necessary to bring the coke to the desired coking temperature is introduced into a slightly inclined rotary tubular oven through which the coal passes during its conversion into coke, the air introduction being effected between the coke outlet and the zone in which the product reaches its maximum temperature and being controlled so that the temperature of the gases issuing from the oven is kept above 600/sup 0/C. At least 60 percent of the air is preferably introduced at the downstream end of the oven, and further air may be introduced at intermediate points along the oven length. An endothermic fluid such as water may also be injected at the downstream end of the oven. Preferably the lowest rate of temperature rise of the product (10/sup 0/ to 15/sup 0/C/min) is in the 300/sup 0/ to 450/sup 0/C temperature zone of the oven. 3 figures.

• Assignee: Houilleres du Bassin de Lorraine
• Patent Number(s): US 4038153
• OSTI ID: 7219391
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010401* -- Coal & Coal Products-- Carbonization-- (-1987)
AIR
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTIONS
COAL
COAL FINES
COKE
COKE OVENS
COKING
DECOMPOSITION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
POWDERS
PRODUCTION
SWELLING
TEMPERATURE DEPENDENCE
VOLATILE MATTER