Crush Rock into Small Pieces?

Rock crushing is that part of the rock mass in mining operations from the matrix and break into the technology and theory of the rock. It is mainly included explosion breaking, mechanical crushing, water jet breaking and other four kinds of thermal breakage. Research on rock fragmentation is the main task: reveal rocks crushing of the relationship between energy consumption and crushing effect, exploration of the crushing rock solid load and sexual-relationship between fracture parameters, security, economic and efficient mining machinery and equipment, to seek new crushing method.

Rock crusher is mainly about the following four kinds:

1. The explosion Shattered

The usage of explosive or other explosive moments of the great energy released and rock crushing, at present it is the most widely used and most effective technology.

2. Mechanical Crushing

Cutting, punching chisel, crushing, grinding are the general four ways. Rock crusher, rock tools into the rock, and within the tool moving in front of the rock mass, is a dense core. Around the dense nuclear broken body produces a large crack. Mechanical crushing is not widely used in hard rock. It is the main reason of the tool wear. Rock crushing is mainly depends on the degree of wear and tear of rock within the content of hard minerals and particle size.

3. Water Jet Breaking

It is divided into low pressure large flow and high pressure small flow. The former pressure does not exceed 2 x 107 pas, is used in hydraulic mining or coal mining. The pressure can reach more than several hundred million palmer, are used to crushing rocks. In addition, it also developed the pulsed jet technology, which can effectively break solid rock without a lot of power. At present the highest instantaneous pressure, has amounted to 5.6G Pa. High pressure water jet breaking rock, high energy consumption of the mechanical structure is complex, much as the machine and auxiliary means of rotary drills and crushing rock in the open air.

4. Thermal Breakage

Form high temperature gradient within the rock mass, and use the rock components of different thermal expansion coefficient, thermal stress forming, flake or crisp crushing rock mass. Containing more quartz rock it is better to use this method. Modern heating method with termite, flame spraying and plasma flame, microwave, infrared radiation and high energy electron beam, are strong breakdown current, laser, etc. But in addition to the flame spraying method, other is in the stage of experiment.

How to choose reasonable rock breaking? According to the degree of crushing rock classification, classification indexes have plats consistence coefficient f, drill ability, than can be invaded explosion resistance, hardness and drilling work, etc. Since the 1950 s, China mining was widely applied plats consistence coefficient f as an index of classification.

Back to The Latest News