Antioxidant for coal and method for preventing oxidation of coal

Abstract

Provided is an antioxidant capable of coating the surface layer of a coal deposit (coal pile) and further reducing the amount of oxygen permeation into the inside of the deposit. The present invention is an antioxidant for coal, containing an oil-in-water type resin emulsion having an average particle size of emulsion particles of 0.3 μm or more and 1.0 μm or less. The antioxidant preferably further contains a surfactant. The worker sprays the above antioxidant on the coal deposit. This forms a consolidated layer on the surface of the coal deposit that is highly effective in suppressing oxygen permeation. Therefore, the permeation of oxygen in the air atmosphere into the inside of the coal deposit is blocked, thus preventing the oxidation of the coal.

1 . An antioxidant for coal, containing an oil-in-water type resin emulsion having an average particle size of emulsion particles of 0.3 μm or more and 1.0 μm or less. 
     
     
         2 . The antioxidant for coal according to  claim 1 , further containing a surfactant. 
     
     
         3 . A method for preventing oxidation of coal, wherein an antioxidant for coal, containing an oil-in-water type resin emulsion having an average particle size of emulsion particles of 0.3 μm or more and 1.0 μm or less is sprayed on coal deposits. 
     
     
         4 . The method for preventing oxidation of coal according to  claim 3 , wherein the antioxidant for coal is prepared by mixing the oil-in-water type resin emulsion and a surfactant.