Roll Crusher an overview | ScienceDirect Topics
The roll speed must be sufficient to prevent stalling, but not so fast that the coal is violently thrown out of the mill. Roll crushers most commonly have either one or two rolls, as shown in Fig. (Meyers, 1981; Jeffrey, 2011; McLanahan, 2011); Stedman, 2011), although some may use three or even four rolls in a twostage crushing system ...