Evaluation of the fire hazard of the process of drying flotation concentrate in a fluidized bed

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Coke Chem. USSR (Engl. Transl.); (United States)

OSTI ID:5134197

Govorov, V I; Tatarchuk, V V; Vasyuchkov, E I; Muzychuk, V D; Goliusov, V M; Anisimov, N Z

In the development of a fluidized bed drying technology, one observes cases of spontaneous ignition of deposits of flotation concentrate in the reactor and the optimal temperature of the spent heat carrier (not above the design value) is maintained in the equipment, spontaneous ignition of the dust should not occur. The causes of ignition may be deviations from the assigned regime and an increase in the temperature in the system over 200/sup 0/C, impairment of the stability of the fluidization, and deposits of coal on the gas distribution grid. An analysis of the thermograms of ignition of samples in a bed showed that the temperature in the combustion zone reached over 800/sup 0/C. Since spontaneous ignition of air mixtures of the finest classes may occur at 560-630/sup 0/C, there is a possibility of explosion hazard during ''eddying'' of deposits of dry dust by hot heat carrier.

• OSTI ID: 5134197
• Journal Information: Coke Chem. USSR (Engl. Transl.); (United States), Journal Name: Coke Chem. USSR (Engl. Transl.); (United States) Vol. 3; ISSN COKCA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010401* -- Coal & Coal Products-- Carbonization-- (-1987)
CARBONIZATION
CHEMICAL REACTIONS
COKE
COKING
DATA
DECOMPOSITION
DRYING
EXPERIMENTAL DATA
FIRE HAZARDS
FLUIDIZED BED
HAZARDS
INFORMATION
NUMERICAL DATA
PARTICLE SIZE
SIZE
TEMPERATURE DEPENDENCE