In a stone crusher plant, the primary crusher is used for coarse crushing of large rocks, also known as coarse crusher. The feed opening of primary crusher can be up to 1600mm (such as heavy hammer crusher) while the particle size they discharge is usually less than 100mm, thus primary crusher has large reduction ratio.

It's known that the common primary crushers include jaw crushers, hammer crushers, impact crushers and gyratory crushers. In order to select a suitable type for the stone crusher plant, we advise you to consider the following 12 tips.

1.That crusher must be capable to reduce the size of even the lastest rocks it is fed.

2.To secure the capacities specified, all feed to crushers should be smaller than the feed opening of the crusher in at least one dimension.

3.The crusher discharge P80 product size needs to remain less than 1/3 of the related conveyor belt width.

4.Primary crushers should provide a significant crushing ratio that’s good enough to impact how many more downstream comminution units are required.

5.No crusher, when set at any given discharge opening, will make a product all of which will pass a screen opening of the same dimensions as the given discharge opening.

6.In in-pit crushing, the primary function of a crusher is to provide a smaller uniform product size for each of transport by the conveying system.

7.Minimum power consumption in part of a good design. For their coarse duty, primary crushers use, comparatively lower energy, to other systems.

8.The horsepower required varies with the size of product being made, the capacity and the toughness of the rock or ore.

9.Primary crusher labour requirements should not be intensified be clogging and oversize rock removal or rock-breaker operation.

10.A crusher’s wear parts need to last as long as operationally-economically possible. Typical numbers are for liner and mantles to have a useful wear-life of almost 2,000,000 tonne on abrasive taconite and 9,000,000 tonnes on porphyry copper ores.

11.Dependability and long service life are landmarks of good primary crusher design of up to 30 yrs.

12.The selection of the primary crusher must consider best-in-breed maintenance services as the whole production line of a stone crusher plant may go through 1 or 2 of these machines and make the in-pit crusher a vital piece of equipment.