A jaw crusher is a fundamental and highly efficient crushing device widely utilized in mining, quarrying, and construction industries. It features two rugged jaws, one fixed and the other movable. When the movable jaw reciprocates, it creates a squeezing action that crushes materials fed into the crushing chamber. This machine can handle various hard substances like rocks, ores, and gravel. Its robust construction allows it to endure intense pressure and continuous operation. With adjustable settings, operators can control the output size of the crushed material. It's a reliable workhorse for reducing large chunks to desired smaller particles.
| Technical specifications | |
| Feeding unit | |
| Max. feed size | 1,080 mm x 680 mm x 410 mm |
| Feeding height | 4,930 mm |
| Feed height with extension | 5,280 mm |
| Feed capacity up to approx. | 650 t/h |
| Hopper width | 2,850 mm |
| Hopper width with extension | 3,900 mm |
| Hopper length | 4,100 mm |
| Hopper length with extension | 3,910 mm |
| Hopper volume | 9.7 m³ |
| Hopper volume with extension | 13 m³ |
| Vibrating feeder | |
| Width x length | 1,110 mm x 3,600 mm |
| Primary screening | |
| Width x length | 1,200 mm x 2,900 mm |
| Model | Double-deck heavy-piece screen |
| Side discharge conveyor | |
| Discharge height | 3,450 mm |
| Width | 650 mm |
| Length | 6,650 mm |
| Crusher | |
| Crusher drive type | Electric |
| Crusher inlet (W x D) | 1,200 mm x 800 mm |
| Crusher weight (approx.) | 29,200 kg |
| Crushing power | 200 kW |
| Single toggle jaw crusher model | STR120 |
| Gap setting | Fully hydraulic |
| Adjustment range of gap width | 70 mm - 200 mm |
| Crushing capacity | |
| Crushing capacity CSS = 100 mm up to approx. | 250 t/h |
| Crushing capacity CSS = 130 mm up to approx. | 325 t/h |
| Crushing capacity CSS = 160 mm up to approx. | 400 t/h |
| Crusher discharge conveyor | |
| Discharge height approx. | 4,000 mm |
| Discharge height, extended approx. | 4,550 mm |
| Width | 1,200 mm |
| Length | 12,300 mm |
| Length, extended | 13,900 mm |
1. Frame: A four-wall rigid structure with upper and lower openings, usually cast in cast steel as a whole for strength and rigidity. It supports the eccentric shaft and bears the reaction force of crushed materials.
2. Jaws: Comprise a fixed jaw and a movable jaw. Both are made of materials like manganese steel. The jaw plate, the working part, is fixed on the jaw bed with bolts and wedges.
3. Eccentric Shaft: The main shaft of the crusher, made of high carbon steel, subjected to huge bending and torsion forces. One end has a pulley, and the other end a flywheel.
4. Flywheel: Attached to the eccentric shaft, stores energy during the empty stroke of the movable jaw, helping to make the machine's work more uniform.
5. Toggle Plates: Connect the moving jaw to the eccentric shaft, transferring force to the moving jaw for crushing materials.
6. Adjustment Device: Such as the wedge type, composed of two wedges. The front wedge can move to adjust the size of the outlet.
7. Lubrication Device: Eccentric shaft bearings often use centralized circulating lubrication. Other parts like the bearing surfaces of the mandrel and thrust plate are lubricated with grease.
1. Expected Output: Determine the amount of material you need to crush per hour or per day. This will depend on the scale of your project.
2. Feed and Discharge Sizes: Consider the size of the raw materials you'll be feeding into the crusher. The jaw crusher should have an inlet (feed opening) large enough to accommodate the largest chunks of material.
3. Hardness of Materials: The hardness of the materials to be crushed is a crucial factor. For very hard rocks like granite or basalt, you need a jaw crusher with robust jaws and a powerful crushing mechanism.
4. Moisture Content: If the materials have a high moisture content, it can affect the crushing process. Some jaw crushers handle wet materials better than others.
5. Physical Dimensions: The size of the jaw crusher should fit the available space at your production site. Consider the length, width, and height of the crusher.
6. Installation and Mobility: Think about whether the crusher needs to be a stationary installation or if mobility is required.
7. Power Requirements: Check the power rating of the jaw crusher. The power needed depends on the size and capacity of the crusher as well as the hardness of the materials being crushed.
8. Energy Efficiency: Look for a crusher that is energy-efficient. Some modern jaw crushers are designed with advanced drive systems and crushing mechanisms that can reduce energy consumption without sacrificing performance.
The most prominent feature of a jaw crusher is its crushing action. It consists of a fixed jaw and a movable jaw. The movable jaw moves in a reciprocating motion towards the fixed jaw. This creates a compressive force that can crush even the hardest materials.
Jaw crushers come with adjustable settings that allow operators to control the output size of the crushed material. This is typically achieved through an adjustment mechanism that changes the gap between the fixed and movable jaws.
These crushers are designed to handle a significant amount of material. They have a relatively large feed opening that can accept bulky raw materials. The size of the feed opening varies depending on the model, but it allows for the efficient feeding of large rocks or chunks of ore.
The frame of a jaw crusher is built to last. It's usually made of heavy-duty cast steel or welded steel plates, providing a strong and rigid structure.
Jaw crushers can handle a wide variety of materials. They are not limited to a specific type of rock or ore. Whether it's hard granite, abrasive quartzite, or softer limestone, a jaw crusher can effectively break them down.
The operation of a jaw crusher is relatively straightforward. The basic crushing action is easy to understand and maintain.
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