Stone Crusher in Mozambique

Mozambique, officially the Republic of Mozambique is a country in Southeast Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west and Swaziland and South Africa to the southwest. We have almost all kinds of crushing and grinding machine for sale in this country include mobile and fixed crushers, sag grinding mills, ag mills, vertical mills and so on. We can also provide a full range of mining and quarrying production program and turnkey projects. If you are interested, please contact us. In the following article, I will introduce you to one of our machines - fixed impact crusher.

Stone Crushing Plant(include impact crusher)

Impact Crusher for sale in Mozambique

Both swing hammer and fixed breaker bar machines may be classified under this heading. A characteristic of these breakers is the large quantity of fines produced and the high reduction ratios obtainable, up to 30 to 1. Run of quarry material can be reduced in one pass of the crusher and the product will be mill feed size. A percentage of slab oversize may however be present in the product which can be reduced by passing it in closed circuit back to the crusher. Impact crusher crushes by attrition action. There are a variety of shapes of hammers, swing for hammer crushers and fixed for impact crushers. They can be made to span the whole width of the machine hinged on two flanges or be installed individually on separate flanges in a row. There are usually two circles of these flange holes one a smaller radius than the other. When the hammers are new and their maximum length, the spindles are placed in the inner row of holes. When worn and shortened, they are then transferred to the outer row to restore the gap to the original size. Hammers are normally made out of manganese steel and are reversible to maximize their use before new ones have to be purchased. In impact crushers; feed is dropped into the central feed chute and cast by the hammers against breaker plates or blocks and shatters under the repeated impact. The symmetrical construction of the crusher permits the unit to work equally well with the rotor revolving in either direction. The advantages of this option are that wear can be evenly distributed over both sets of breaker plates and that hammers do not have to be turned during their working life.

Speed has a definite influence on the reduction ratio of hammer crushers. The effect of a speed of about 60 meters per second on friable material is almost explosive the rock being pulverized. This results in a very high percentage of fines. A low speed crusher can result in a fairly uniform product with low percentage fines providing the feed not to strike too many times in the crushing chamber. The design of the crushing chamber will also effect on the fineness of the product. Machines which perform the majority of the work by plain impact action will have a more uniform product size with fewer fines. With all hammer crushers a means of controlling the feed rate is necessary and of screening out under size material before it enters the crusher. A constant degree of crushing can be maintained by having moveable breaker plates so that as the hammers wear the plates are moved inwards. A good practice which helps to reduce costs is to preserve hammer profile for as long as economically possible.