ball tube mill
ball mill
ball tube mill is designed to grind coal and cment.This type of mill consists of a rotating tube filled with cast alloy balls. Coal is introduced
through two hollow trunnions on each side of the tube. As the tube rotates, the balls tumble onto the coal, crushing and pulverizing it.
A ball-tube mill in which an inclined wall dividing the mill into coarse and fine grinding chambers occupied by grinding bodies has through holes for the passage of the material being ground provided in a portion of contact of the surface of the inclined wall with the grinding bodies present in the coarse grinding chamber. The through holes have a length much greater than their width with their elongated side running in parallel with an outer contour of the inclined wall.
The Ball Tube Mill (BTM) is a cylindrical low-speed grinding mill. As one of the most robust mills, it consists of a steel barrel, lined with cast abrasion resistant liners, and partially filled with hardened steel balls. Coal mixed with preheated primary air enters both ends of the mill from a crusher/dryer or feeder. As the mill rotates, the balls cascade and pulverize the coal by impact and attrition. The pulverized coal is then conveyed by primary air to external centrifugal classifiers. Fine coal particles exit the classifier into coal piping for transport to the furnace, while oversized coal particles return to the mill, by classification, for further pulverizing.
ball tube mill used for coal
We offers the Riley Ball Tube Mill System for large coal pulverizing applications from abrasive petroleum coke to high moisture content sub bit. coal, such as PRB coal.
This type of mill, with the dependable Riley components provides a flexible, high availability installation with relatively low aintenance. Total capacity of RPI’s Ball Tube Mills in service feed pulverized coal to power plants generating over 15,000 MW of power.