Mine High Pressure Roller Mill Machine High Recovery Rate

Ore Grinding Mill Mine High Pressure Roller Mill

Ⅰ. Basic introduction of high pressure roller mill(ore grinding mill)

The high-pressure roller mill developed by applying the lamination pulverization mechanism is a typical equipment used in the world for the crushing and grinding of non-ferrous mines and oxidized pellets. Because it has the advantages of high production efficiency, significant energy saving, low investment, convenient maintenance and good working environment.

Ⅱ. Components of high pressure roller mill(ore grinding mill)

Two horizontally arranged and synchronously rotating squeezing roller devices 4 form a squeezing pair, one of which is a fixed roller, and the other is driven by the pressure provided by the hydraulic system 6 to the hydraulic cylinder to push the movable roller to move back and forth in a small amount. The roller and bearing system are composed of The two sets of squeeze roller devices are respectively installed on the frame 3 composed of the frame structure through the guide device. Each squeeze roller has its own independent transmission device with the same structure, and is connected by universal The transmission system 1 composed of the coupling or the safety clutch and the planetary gear reducer transmits the energy to the rollers, and the material enters the material cavity between the two rollers through the adjustable feeding device 2 . A central automatic lubrication system supplies grease to each bearing system in the equipment. The control part of the high-pressure roller mill is mainly based on the signals provided by the detection system, and the equipment is monitored by the automatic control system. The control can be divided into three control modes: beside the machine, on-site, and central control.

Ⅲ. Features of high pressure roller mill(ore grinding mill)

(1) Low energy consumption per unit of grinding and high production efficiency Because the high-pressure roller mill makes full use of the working mechanism of lamination and crushing, its energy utilization rate is very high. The probability and grinding characteristics are greatly improved, mainly due to the large number of contacts between particles and the strong force.

(2) It can handle materials with high moisture content. The conventional fine crushing or grinding process to crush wet materials must first dry the materials, or use wet grinding. Drying is an energy-intensive process, whereas wet-milled products require settling and filtration. But for the high pressure roller mill, it is better to contain a certain amount of moisture (less than 10%) in the rolled material, which can not only form a better self-generating roller fabric pad, but also improve the working life of the squeeze roller. The currently used cemented carbide stud roll surface not only wears very little, but also has a roll surface life span of 7 000~30 000h.

(3) Improve the product quality and recovery rate of subsequent operations

Under the action of high pressure, local pressures of different values ​​are generated inside the material particles in the particle group and between the interface of the mineral and the surrounding waste rock. The ability of each component in the particle to withstand these stresses determines whether it is crushed or only occurs. deformed. When processing diamond, the hard diamond minerals are subjected to these stresses and the surrounding rock is shattered. During the processing of gold ore, the surrounding rock is crushed, while the gold mineral is basically intact or slightly deformed. For sulfide ore or metal ore, due to the difference in the properties of each mineral composition, pulverization occurs along the interface, which increases the degree of dissociation of the minerals. During exudation operations, cracks and fissures on and within the particle allow the infiltration of exudate, thereby improving product grade and recovery of useful minerals.

(4) Less floor space and less investment in civil construction

Due to the compact structure, light weight and small size of the high pressure roller mill, its installation location occupies less space. Because the grinding action mainly occurs under the mutual extrusion between the two rollers, the extrusion force generated is mainly borne by the frame, and the load on the foundation is small, so compared with the mill and other equipment, a lot of basic investment can be saved .

(5) Good production environment

It can be seen from the working principle of the high pressure roller mill that due to the use of the lamination crushing mechanism, the material is enclosed in the closed space between the roller and the feeding device, and crushed by static pressure, generally there will be no impact and material splashing, so the equipment's Vibration and noise are lower, improving the working environment for workers.

Ⅳ. Application of high pressure roller mill(ore grinding mill)

In the early 1990s, developed countries in the world, such as Germany, the United States, Brazil, Russia and other countries, have successfully used high-pressure roller mills for diamond dissociation, Precious metal ore beneficiation, base metal ore beneficiation and preparation of pellet feed and other projects have achieved significant economic and social benefits.

The high-pressure roller mill is used in the grinding production process system of the pellet feed iron concentrate. In terms of production efficiency, production quality, economic and social benefits, it is much better than the use of the lubricating mill. Therefore, in In the future mineral processing industry, it will be the general trend that high-pressure roller mills replace lubricating mills.

 
Ore grinding mill technical parameters

 

Ore grinding mill photo explanation