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A procedure to prevent the spontaneous inflammation of minerals, especially charcoal of stone in the mines and to combat the means in the same (Machine-translation by Google Translate, not legally binding)
A procedure to prevent the spontaneous inflammation of minerals, especially charcoal of stone in the mines and to combat the means in the same (Machine-translation by Google Translate, not legally binding)
Procedure to prevent the spontaneous inflammation of minerals, especially stone coal, in mines and to fight fires in them by means of incommunication of the routes through which the air enters or exits more or less surreptitiously, characterized because the incommunication or closure airtight is obtained by projecting a foaming agent consisting of approximately 45% alpha-naphthalene sulphonic acid in solution and 55% of an aqueous solution of a urea and formaldehyde resin, which substance solidifies on the corresponding material, by means of a projector device. Permanently adhering to its contour and preserving indefinitely its volume and tightness or hermetic isolation. (Machine-translation by Google Translate, not legally binding)
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