公开(公告)号：US20210292674A1

公开(公告)日：2021-09-23

申请号：US17266109

申请日：2019-04-11

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Masaki MIYAHARA ,  Youichi HIRANO ,  Takashi KIKKAWA

IPC: C10L10/18

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.