Customer: Spiral Classifier by means of the theory of different solid particles sizes, different specific gravity, thus settling velocity of the liquid is different, fine mineral particles floating in the water and overflow ,coarse mineral particles sinking to bottom , into the upper by screw and discharge, is a classifier equipment to classify , able to filter feed powder grinded from grinding mill , and then using a spiral piece screw the coarse material into the feed inlet of mill , to filter out the fine material discharged from the overflow tube.
Aggregate has gradually become the construction material. The development trend of concrete is to develop high performance concrete. So the aggregate plays a role in the construction and production. If it does not add the aggregate, it will not be able to form.Concrete production can not be separated from the quality of sand and gravel aggregate. Concrete and cement mixing is mostly paste. According to the characteristics of each kind of stone, the reasonable gradation can be achieved to meet the requirements of high quality of concrete in construction. Sand gravel aggregate plays a very important role in building construction.
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The first step in quarrying is to gain access to the granite deposit. This is achieved by removing the layer of earth, vegetation, and rock unsuitable for product collectively referred to as overburden.
The belt 36 may be considered with respect to its upper portion 43, resting on the rollers 33-35 and its lower portion 44, which may be supported by a few intermediate rollers 4-5, located below the lower stretch of the belt and carried by longitudinally extending frame members 4-6, having bearings for the trunnions of rollers 45'.
The hardness test (ASTM D2240 ) was performed by the shore hardness tester to measure the rebounding height of the hammer dropped on the test sample from a constant height. The shore hardness tester of the D-type model was employed to allow measuring the rebounding height of a diamond weight of 4 g dropped from the height of 25 cm with the test scale of 0 to 140.
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