Ball mills Hardinge

Other coarse crushers Hammer mill Single roll crusher Pin mill Symons disc crusher Griffin mill Ring roller mill (Lopulco) Ball mill Tube mill Hardinge mill Babcock mill... 

In its simplest form, the ball mill consists of a rotating hollow cylinder, partially filled with balls, with its axis either horizontal or at a small angle to the horizontal. The material to be ground may be fed in through a hollow trunnion at one end and the product leaves through a similar trunnion at the other end. The outlet is normally covered with a coarse screen to prevent the escape of the balls. Figure 2.27 shows a section of an example of the Hardinge ball mill which is also discussed later in this chapter. 

Figure 2.27. Cut-away view of the Hardinge conical ball mill showing how energy is proportioned to the...

The Hardinge mill, shown in Figure 2.30, is a ball mill in which the balls segregate themselves according to size. The main portion of the mill is cylindrical as in the ordinary ball mill, although the outlet end is conical and tapers towards the discharge point. The... 

Figure 12.5. Jaw, roll, impact, and tumbling equipment for size reduction, (a) Blake-type jaw crusher operates at 200-300 strokes/min (Allis-Chalmers Co.), (b) Smooth roll crusher, for which operating data are in Table 12.8(b). (c) Swing hammer mill operating data in Table 12.7(a). (d) View of a conical ball mill, showing distributions of balls and material and crusting ranges data in Table 12.6(b) (Hardinge Co.). (e) Tube mill with three compartments, length to diameter ratio 3-5. (f) Rod mill in a cylindrical tumbler, LID = 1.2-1.6 data in Table 12.6(d).

Conical ball mills like the Hardinge mill shown in Fig. 8 have their larger diameter closer to the feed inlet. 

Fig. 8 Hardinge conical ball mill. (Courtesy of Metso Minerals, York, PA.)...

Hardinge Mill n Conical type of ball mill used for grinding rock and similar materials. 

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