a. A coarse screen made of parallel or crossed bars to prevent passing of
b. A series of parallel and crossed bars used as platform or walkway
floors or as coverings for pits and trenches over which traffic can pass;
generally removable to permit access to conveying equipment for servicing.
c. A series of parallel and/or crossed bar units fastened to or propelled
by a conveying medium, used for carrying large lump-size bulk material or
objects. They usually permit passage of air for cooling or for heat to
d. The act of sorting ores by means of grates.
Dictionary of Mining, Mineral, and Related Terms