History Development of Concrete Crushers

The earliest versions of cement and rock crushers involved the use of two rocks being slammed against each other. An anvil was formed by one rock, while the weight of the other was used through manual power to achieve the necessary crushing. A crusher that was called the Cornish stamp was developed in the 19th century for breaking up tin and was used in mining. The early years of the 20th century led to mobile rock crushers being developed.

Graniteis a common and widely used type of intrusive, felsic, igneous rock. Granites usually have a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the ground mass, in which case the texture is known asporphyritic. A granitic rock with a porphyritic texture is sometimes known as porphyry.Granites can be pink to gray in color, depending on their chemistry and mineralogy. By definition, granite is an igneous rock with at least 20% quartzby volume. Granite differs from granodiorite in that at least 35% of the ore in granite is alkali ore as opposed to plagioclase; it is thealkali ore that gives much granite a distinctive pink color. Outcrops ofgranite tend to form tors and rounded massifs. Granites sometimes occur incircular depressions surrounded by a range of hills, formed by the metamorphic aureole or hornfels. Granite is usually found in the continental plates of the Earth’s crust.

The breakthrough in crusher design came from the hydraulic relief system that is a comparatively recent invention. This has helped to increase the life span of the crusher and also reduce its down time when repairs are necessary on the equipment. This in turn increases profit as well as productivity. Hydraulics is an invention that allows hard material like cement to be crushed without any damage to the machinery and made for a major breakthrough in equipment for crushers.

The design of such crushers were static for almost six decades. The cone crushers that then developed were of high speed and were very reliable. A cone crusher of 48 inches developed in the 1960’s had a capacity to crush 170 tons of rock. The present development in technology has led to the same size of crusher being able to crush 300 tons of rock. The design of the cone crusher remained the same, but higher speeds and stronger chambers used in the crushers helped to increase the output.

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