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Basis of Pin mill(1)
The Alpine pin disc mill shown in Figure 1.0 is a form of pin mill and consists of two wertical steel plates with horizontal projections on their near faces. One disc may be stationary whilst the other disc is rotated at high speed; sometimes, the two discs may be rotated in opposite directions, The material is gravity fed in through a hopper or air conveyed to the centre of the discs, and is thrown outwards by centrifugal action and broken against of the projections before it is discharged to the outer body of the mill and falls under gravity from the bottom of the casing.
Alpine pin mill with both discs and sets of pins rotating 1.0
Alternatively, the pins may be replaced by swing beaters or plate beaters, depending on the setup and application. The mill gives a fairly uniform fine product with little dust and is extensively used with chemicals, fertilizers and other materials that are non-abrasive, brittle or crystalline. 
Alpine Universal mill 2.0
Control of the size of the product is effected by means of the speed and the spacing of the projections and a product is effected by means of the speed and the spacing of the projections and a product size of 20 m is readily attainable.
The Alpine universal mill with turbine beater and grinding track shown in Figure 2.0 is suitable for both brittle and tough materials. The high airflow from the turbine keeps the temperature rise to a minimum.
Pin mill related articles
Basis of Pin mill(2)
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