Hydraulic roller crusher adopts a pair of parallel and horizontally installed cylindrical roller to crush materials. The materials fall into the gap between the rollers from feeding mouth and get crushed. When there is something with too high hardness or uncrushable, the roller can back off automatically under the control of hydraulic cylinder and spring, protecting the crusher machine from being damaged.
The materials are crushed by the roller with opposite rotating direction. Compared with other crushers, roll crusher is more stable in rotating speed and crushing effect. The overcrushing phenomenon seldom happens. The most suitable rotary speed is dependent on the characteristics of the roll surface and the hardness and size of the materials. These features can be tested by experiment. The roller crusher should ensure high yield, low energy consumption and uniform products at the same time of light abrasion of the rollers. The bigger granularity materials have, the more slowly rollers should rotate. The speed of the grooved teeth roll crusher and toothed crusher should be slower than that of common roll crusher. It should have a higher speed when crushing soft or brittle materials and vice verse.
Crusher equipment is widely used in mining, metallurgy, construction materials, road construction, railway construction, water conservation and chemistry industry etc. the roller crusher has a special advantage in artificial sand making process. Although the one-time investment cost is higher than other crushing equipment, it has a higher productivity and sand rate obviously, which is out of reach for other sand making equipment.
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hard rock crushing machine: http://www.made-crusher.com/productslist/page_1_1.html