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The river pebble is a kind of pure natural stone. It is taken from the sandstone mountain produced by the uplift of the ancient riverbed after the crustal movement that occurred thousands of years ago. It has experienced continuous crushing and friction during the flooding and running of water. The main chemical component is silica, followed by a small amount of iron oxide and trace elements such as manganese, copper, aluminum and magnesium. During the evolution of vicissitudes of tens of thousands of years, they have suffered from the wave-washing movement, and they have lost irregular edges and corners by gravel collision friction. The surface is smooth and clean, the average content of SiO2 is 85%, and the highest compressive strength can reach 300MPa or more. It is more than 7 degrees Mohs, and has good pressure resistance, wear resistance and corrosion resistance. It is an ideal widely used mechanism sand material.
At present, there are many crushing equipment for crushing river pebbles on the market. For high-quality river pebbles, crushing equipment cannot be selected at will, equipment is not suitable, not only cannot bring high yield, but also cause the service life of the equipment itself to decline, subsequent production costs The increase of high-hardness stone such as broken river pebbles, it is best to use the following crushers.
1. Jaw Crusher
The crushing ratio of the jaw crusher is large, and the large-scale granite that was originally mined can be crushed to medium grain size by the jaw crusher at one time, which is convenient for processing in the next process. More than granite, many stone production lines will use the jaw crusher as a piece of crushing equipment. The equipment has good wear resistance, high crushing strength, and the same amount of stone material, with less wear and reasonable component design.
2. Impact crusher
The impact crusher is broken by impact energy, and the crushing angle is reasonable and has a shaping effect.
3 Cone crusher
The cone crusher can break the medium-grained granite into small particles and more uniform granite. The cone crusher crushes the granite by bending and extrusion. The crushed granite has a more uniform grain shape and is laminated. Broken, the finished grain shape is more excellent.