In classic mine design, the crusher is located near the shaft. This has the advantage that the material can go directly from the crusher to the skip. For mine operations that use truck haulage, the extra travel distance for the trucks is compensated by the advantages of more rapid access for excavation of the crusher and the expenses involved in moving the crusher de la Vergne, 2003.Get A Quote
Figure 1160 Crusher Location in an Underground Mine www.ugdsb.on.ca.
At the bottom of the hopper there is a grily. The grily is responsible for preventing over sie material from entering the ore passes and the crusher where the material is liable to do damage to the equipment and underground construction. A standard opening for the grily, as defined by McIntosh Engineering, is 16 by 18 inches. The rock that is stopped by the grily is often broken in to more manageable pieces by using a hydraulic or pneumatic rock breaker.
In most underground mining applications a Ross Chain Feeder is installed. The Ross Chain Feeder serves the purpose of slowing the violent rush of dense heavy rock through the feeder system all the way in to the crusher. This will provide significant wear protection on the feeder system due to drastically reducing the impact velocity of the ore with the feeder apparatus. The Feeder Chain also serves to slow the ore to ensure that a back up or overload does not occur in the crushing system and the crushers output surge pile does not become largely unmanageable.
There are several types of crusher that are used in underground mining operations. The most common types of crushers are the gyratory crusher, the jaw crusher and the cone crusher. The technology and selection criteria will be discussed in section four.
After the ore is crushed it moves in to a chamber known as the ore bin. The bottom of the ore bin has a controlled hopper that will periodically release ore on to a transportation system. This transportation system can consist of either conveyors or trolleys, which guide the ore to the end of the pass where it will finally be loaded in to a skip so it can move up to the surface. This system will also be controlled using control chains to prevent the violent surge of a heavy rock mass to minimie damage.
Figure 3 An example of a conveyor assisted ore transport system into the skip160www.flsmidthminerals.com.
In any operation that incorporates sie reduction, selecting the primary crusher is vital to the overall success. The main parameters to first decide on a general type of crusher are the impact strength, product sie and material hardness. The final design for a crusher will be selected primarily based on required capacity, feed and product sie. It should be noted that further crusher selection could be defined based upon the location and the degree of mobility.
Technological advancements, from 1830 when the first crusher design was patented, have allowed todays crushers to take blasted ROM Run of mine feed up to 1500mm 60 inches and reduce them to sies ranging from -300mm to -38mm Mular et al, 2002.
Nov 07, 2020nbsp018332Gyratory crusher definition A gyratory crusher is a crusher in which a cone-shaped rod rotates in a cone-shaped bowl... Meaning, pronunciation, translations and examples.
The Ernest Henry Mine gyratory crusher is designed to crush rocks from approximately 1500mm down to 160mm at a feed rate of 4,000 tonnes per hour. It achieves this by means of a 71-tonne mantle, powered by a 470kW motor, which crushes rocks against the body of the crusher see figure 1 below. Figure 1- Crusher Internal Layout.
Owning international advanced crushing technologies, the HGT Gyratory Crusher is a new-type intelligent coarse crusher with big capacity and high efficiency. Compared with traditional gyratory crushers, it boasts higher crushing efficiency, low using costs and convenient maintenance and adjustments, able to offer customers more efficient and intelligent coarse crushing solutions.
Material Granite, basalt, diabase, limestone, dolomite, gold ore, copper ore, iron ore, manganese ore and so on.
A crushers capacity depends on its crushing cavity to a great extent. HGT Gyratory Crusher has a delicate crushing cavity which brings optimal productivity, allows bigger feeding sie and effectively extends the service life of lining plate. That the large dip angle and the long crushing surface combine with optimied stroke and speed can give the crusher super-strong crushing capability. HGT Gyratory Crusher can service for various coarse crushing demands. By only changing the eccentric bushing, the output can get adjusted.
We specially equip HGT with automated lubricating and hydraulic system, which can choose heating, cooling or circulation automatically according to specific production conditions. The configured automated axis position controlling system can control the axis through the hydraulic system. It can help adjust the opening of the discharge port freely. Through the external gear adjustment device, the side clearance of gear can get adjusted easily. The beam bushing and sealing can be replaced without dismantling the beam.
The HGT Gyratory Crusher adopts the automated control system. It is equipped with various types of sensors to monitor the lubrication pressure and temperature, the bearing temperature, the rotation speed and the axis position, a PLC as well as a touch screen. By these, every production stage can be monitored, displayed and controlled in real time. Besides, the automated control system can also optimie the working parameters of configured devices according to actual operation conditions to increase production efficiency.
Whether being used in fixed or semi-mobile crushing lines, on ground or underground, HGT Hydraulic Gyratory Crusher is applicable in severe crushing environment. It is able to crush various hard and abrasive ores and rocks.
HGT Gyratory Crusher is mainly composed of the beam, frame, moving cone, eccentric sleeve, transmission part and hydraulic cylinder. Driven by the motor, the horiontal shaft starts to rotate which then further makes the eccentric sleeve rotate under the assistance of gear. Next, the eccentric sleeve drives the moving cone to swing in a circular motion to squeee and crush rocks continuously.
Adjusting the hydraulic cylinder on the bottom of moving cone to let the cone move up and down can make the adjustment of the discharge ports opening easier, and, therefore, the granularity of final products can get better control. Besides, the hydraulic cylinder has a protection function when iron blocks intrude. If there are unbreakable materials such as iron blocks entering the crushing cavity, the hydraulic cylinder will drop the moving cone to release iron blocks while the crushing process doesnt stop.
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Porosity-freeuniform grain structure The purity of our raw materials, coupled with controlled, directional solidification during the casting process creates a tighter, denser grain structure in our alloys, while eliminating 99.9 of the gas... Gyratory crushers.
Home Crusher NDT Program Gyratory Crusher Reliability Program.
The objective of the gyratory crusher reliability program is as follows.
Gyratory crusher main shaft sleeve US9827568B2 en 2012-08-02 2017-11-28 Sandvik Intellectual Property Ab Gyratory crusher main shaft sleeve US10335795B2 en 2012-10-26 2019-07-02 Thyssenkrupp Industrial Solutions Ag Gyratory crusher for comminuting material to be crushed.
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