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ASTM C737-13
- Standard Specification for Limestone for Dusting of Coal Mines
- standard by ASTM International, 12/01/2013
- Publisher: ASTM
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1.1 This specification covers limestone suitable for use as dust in coal mines to reduce risk of coal dust explosions.
Note 1-Limestone can serve as a source of incombustible material in coal mine operations. Limestone is dusted onto coal exposures in sufficient amount so that not less than 65 % of all loose dust shall be limestone incombustible material. In return air courses the concentration of incombustible materials should be not less than 80 % of the total dust (MSHA 30 CFR 75.403). With such a concentration of limestone incombustible material, dust explosions cannot initiate or be propagated from nearby gas explosions. The limestone must be substantially dry in order to dust satisfactorily.Related Products
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