Horizontal Media Mills

Figure 20.1. Common dispersing equipment for liquid color (a) horizontal media mill (b) three-roll mill (c) dissolver mixer.

Horizontal Media Mills Horizontal media mills are the most common style of mill and are manufactured by a large number of companies. Figure 21-75 illustrates the Drais continuous stirred media mill. The mill has a horizontal chamber with a central shaft. The media are stirred by discs or pegs mounted on the shaft. The... 

PEBBLE MILL. A jacketed steel cylinder rotating on a horizontal axis and containing flint or porcelain pebbles as the grinding medium. Its operation is similar to that of a ball mill. It is used for grinding and mixing of dry chemicals, pigments, food products, and the like. Pebble mills are usually lined with alumina, buhrsione, or similar material to protect the walls from wear. 

Ball mill (pebble mill) n. A cylindrical or conical shell rotating horizontally about its axis, partly filled with a grinding medium such as natural flint pebbles, ceramic pellets, or hard metal balls. The material to be ground is added to just fill, or shghtly more than fill, the voids between the balls. 

MEDIUM-SPEED ROLLER-TYPE PULVERIZERS. This type of pulverizer can be of a design in which the ring is stationary and the rolls rotate or one in which the rolls are mounted off the mill housing and the ring rotates. In the first type, grinding elements consisting of three or more cylindrical rolls, suspended from driving arms, revolve in a horizontally positioned... 

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