Mining machinery working principle
Mining machinery has its own working characteristics according to the different models.
Disc mining machinery brake drilling machinery is divided into two types of rock drills and drilling rigs. The drilling rigs are divided into outdoor drilling rigs and underground drilling rigs. The rock drill is used for drilling blastholes with a diameter of 20-100 mm and a depth of 20 meters or less in the medium-hard rock. According to its power, it can be divided into pneumatic, internal combustion, hydraulic and electric rock drills. The rock drilling machine is the most widely used; the open-air drilling machine is divided into steel rope impact drilling machine, down-the-hole drilling machine, cone drilling machine and rotary drilling machine according to the working mechanism of the broken ore rock. The steel rope impact drilling machine has been gradually replaced by other drilling machines due to low efficiency. .
The boring machine uses the axial pressure and the slewing force of the tool to produce a rolling effect on the rock face, and directly breaks the roadway or the well-forming machinery of the rock. The knives used are disc hobs, wedge hobs, ball hobs and milling tools. According to the different roadways, it can be divided into a patio drill, a shaft drill and a tunnel excavator.
The centrifugal concentrator is a machine for recovering metal ore particles in fine slime, and is mainly composed of a host and a control mechanism. In the centrifugal force field generated by the high-speed rotation of the conical drum of the main machine, the heavy ore particles are deposited on the drum wall to become a concentrate, and the light ore particles are attached to the surface of the concentrate, and are discharged by the flow film (the slurry flow) to discharge the drum. Become a tailings.
The mine crusher magnetic separator is a machine that uses the magnetic differences of various minerals to sort the effects of minerals by magnetic force and mechanical force. The magnetic separator consists of a magnetic system, a sorting device, a feeding and discharging device. There are many types of magnetic separators, mainly including permanent magnet cylinder magnetic separator, electromagnetic flat ring magnetic separator and high gradient magnetic separator.
The flotation machine is a machine that sorts fine-grained minerals by utilizing the difference in physical and chemical properties of the surface of the ore. The flotation flotation machine is equipped with flotation reagents, which are compressed by air or mechanically stirred to make the mineral particles which are not easily wetted by water adhere to the bubbles (positive flotation method), rise to the liquid surface, and pass the ore discharge device as the concentrate. The discharged ore, which is easily wetted by water, remains in the tank as a medium tailings discharge.
The concentrate obtained from the wet beneficiation needs to be treated by a dewatering machine to separate the solid and liquid. Dewatering machines can be divided into concentrators, filters, centrifugal dewaterers and dryers.
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