Fire extinguishers – Processes – Of preventing fire
Patent
1975-04-08
1976-11-09
Love, John J.
Fire extinguishers
Processes
Of preventing fire
169 64, A62C 200, A62C 300
Patent
active
039905179
ABSTRACT:
A new process has been devised for the application of a mixture of calcium or magnesium chloride and a non-ionogenic wetting agent for the prevention of the spontaneous ignition of coal, especially during underground mining operations, by applying the same to the surface of the coal. The process involves boring of holes into the out-cropping coal and then forcing the mixture of calcium or magnesium chloride and wetting agent in an aqueous solution which contains 25 to 35% by weight of the mixture through the bore holes. A constant quantity of about 3 to 6 liters of solution per minute is pressed into the bore holes, the pressure being only sufficient to overcome the counter pressures occurring in the coal. The procedure greatly extends the time of effectiveness of the prevention of spontaneous ignition of the coal and eliminates to a large extent the expenditure of labor for supervision and retreatment of the surface of the coal now being experienced.
REFERENCES:
patent: 2063761 (1936-12-01), Scholz
patent: 2786815 (1957-03-01), Buggisch et al.
patent: 2924279 (1960-02-01), Hofbauer et al.
patent: 3837404 (1974-09-01), Buggisch et al.
Chemische Fabrik Kalk GmbH
Kashnikow Andres
Love John J.
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