Product: Hammer Mill Rock Crusher
Feeding Size: 100-1000 mm
Production Capacity: 0.3-1100 t/h
Application: Limestone, metal ore, coal, pebble, concrete, dolomite, bluestone, gravel, etc.
Hammer mill Crusher introduction
Hammer mill crushers are primarily used for secondary and fine crushing of ores, further breaking down metal ores after coarse crushing by jaw crushers. In the construction materials industry, hammer mill rock crushers are used to produce construction sand and gravel and to crush materials like limestone. In the chemical industry, they are used to crush raw chemical materials. In the environmental protection sector, they are employed to process construction waste and other solid waste for recycling.
A hammer crusher crushes materials using the high-speed rotation of its hammer head, making it suitable for brittle and moderately hard materials. It is often used for crushing limestone.
The material size that a hammer mill crusher can handle varies depending on the specific model, specifications, and design purpose. For smaller hammer crushers, the feed inlet size is generally smaller, allowing a maximum material size of around 100-300 mm. These hammer crushers are primarily used for further fine crushing of relatively small materials to meet requirements for finer processing or analytical testing. They are typically used in laboratories, small processing plants, or scenarios with low production demands.
For small limestone quarries, medium-sized hammer mill rock crushers are more suitable and can handle a maximum material size in the range of approximately 300-600 mm. These hammer mill crushers are used to crush limestone within this size range for secondary or fine crushing, preparing it for the production of construction sand and gravel.
In industries involving large-scale mining or construction material production, hammer crushers can handle even larger material sizes. They may accommodate maximum raw material sizes exceeding 600 mm, with some extra-large equipment capable of processing blocks close to 1000 mm. For example, in large-scale processing lines for iron ore, granite, and other minerals, such large hammer crushers can crush freshly mined ore into smaller pieces. The material is then processed through subsequent stages like screening and additional crushing to achieve the desired final product sizes.
Although hammer crushers have a theoretical maximum feed size, in practical operation, it is recommended to feed materials slightly smaller than the maximum size. This ensures efficient operation, reduces the likelihood of malfunctions, and achieves better-crushing results. Additionally, maintaining uniform feed material size is crucial to avoid equipment blockages or overload caused by sudden entry of oversized materials.
AGICO Cement Hammer Mill Crusher Features
High Crushing Ratio: Hammer crushers feature a high crushing ratio, allowing them to break down large-sized materials into smaller particles in a single operation. Generally, the crushing ratio can reach around 10–25, effectively reducing large blocks of ore, coal, limestone, and other materials into fine particles that meet production requirements.
High Processing Capacity: Hammer crushers achieve high production efficiency thanks to the continuous impact crushing mechanism and the ability to control processing capacity by adjusting the feed rate and hammer rotation speed. The processing capacity ranges widely, from a few tons per hour for small models to hundreds or even thousands of tons per hour for large models.
Versatility: These hammer mill rock crushers are capable of handling various types of materials, including ores, rocks, coal, chemical raw materials, and construction waste. By selecting suitable hammer materials and rotation speeds, effective crushing can be achieved for materials of varying hardness. For instance, ordinary high-manganese steel hammers are sufficient for soft materials like coal, while high-chromium alloy hammers and adjusted working parameters are needed for harder materials like granite.
Uniform Product Size: By appropriately adjusting the sieve plate aperture and the crusher’s operating parameters, the crushed product can achieve a relatively uniform particle size. This is especially important for industries with stringent requirements for product size, such as construction materials production and chemical raw material processing.
Customized Service: AGICO Cement offers customized hammer crushers, no matter for large industries or small industries, we can provide suitable hammer mill rock crushers for crushing raw materials.
Hammer Mill Crusher Working Principle
The hammer crusher mainly consists of a housing, rotor, hammers, lining plates, and grates. The rotor is the primary working component of the hammer crusher, with multiple hammers mounted on it. The grates are installed at the discharge outlet to control the size of the discharged material.
The hammer mill crusher primarily relies on high-speed rotating hammers to crush materials. When materials enter the crushing chamber, the high-speed hammers strike the material with strong impact force, breaking it into smaller pieces.
The motor drives the rotor to rotate at high speed. When limestone or other materials enter the hammer crusher, they are struck and broken by the high-speed rotating hammers. The fragmented material gains kinetic energy and is hurled against the inner walls of the housing or the grates. Simultaneously, the material is subjected to grinding action between the hammers and the grates. Particles smaller than the grate openings are discharged through the outlet.
As the hammers rotate, the material in the crushing chamber is repeatedly thrown, impacted, and ground, further reducing its size. The crushed material, under the influence of gravity and the force of the hammers, exits through the bottom of the crusher via the screen plate. The aperture size of the screen plate can be adjusted to achieve the desired particle size. Materials smaller than the screen openings are discharged, while larger particles remain in the crushing chamber for further reduction.
Hammer crushers typically accept feed sizes ranging from several dozen millimeters to several hundred millimeters, with discharge particle sizes adjustable via the grate gap, generally between a few millimeters to several dozen millimeters. Hammer crushers are characterized by a high crushing ratio and high production efficiency but have the drawback of fast hammer wear.
Factors Affecting the Output of Hammer Crushers
- Rotor Speed
A higher rotor speed of a hammer crusher increases the frequency of hammer impacts on the material, enhancing the crushing effect and raising the output. However, excessively high speeds can lead to accelerated hammer wear, reducing their lifespan.
- Feed Speed
If the feeding speed of the hammer crusher is too fast, material may accumulate inside the crusher, impairing the crushing effect and reducing output. Conversely, a feeding speed that is too slow will result in underutilization of the equipment, lowering production efficiency. Therefore, feeding speed should be adjusted based on the crusher model and material characteristics to achieve optimal production performance.
- Hammer Wear
If the feeding speed of the hammer crusher is too fast, material may accumulate inside the crusher, impairing the crushing effect and reducing output. Conversely, a feeding speed that is too slow will result in underutilization of the equipment, lowering production efficiency. Therefore, feeding speed should be adjusted based on the crusher model and material characteristics to achieve optimal production performance.
- Grate Blockage
The grate controls the discharge particle size. If it becomes blocked, crushed material cannot be discharged on time, causing accumulation inside the crusher and affecting output. Regular cleaning of the grate is necessary to ensure smooth operation.
- Bearing Lubrication
Bearings are critical components of the hammer crusher. Proper lubrication reduces friction, minimizes wear, and improves operational efficiency and output. Regular lubrication maintenance is essential to ensure the smooth functioning of the bearings.
Main Spare parts of Hammer Mill Crusher
Housing
The housing is typically made of welded steel plates. Its primary function is to protect the internal working components and prevent materials from flying out during the crushing process. The housing usually features an inlet and an outlet. The size and position of the inlet vary depending on the crusher model and application, while the outlet connects to the grate, allowing crushed materials to be discharged.
Rotor
The rotor is the core component of the hammer crusher, consisting of the main shaft, discs, and hammers. The main shaft connects to the motor via a pulley or coupling, driving the discs and hammers to rotate at high speed. The discs provide mounting points for the hammers and ensure their stability during operation. The hammers, which directly impact and crush the material, are typically made of high-manganese steel or other wear-resistant materials to enhance their durability.
Hammers
The shape and weight of the hammers significantly influence the crushing effect. Common hammer shapes include T-shaped, I-shaped, and S-shaped designs. Heavier hammers generate stronger impact forces but must consider the motor’s power and the rotor’s load capacity. During operation, hammers wear down due to frequent impacts with the material and must be replaced periodically.
Liners
Liners are installed on the inner walls of the crushing chamber. Their main purpose is to protect the housing from wear caused by material impacts. Additionally, they increase friction between the material and the chamber wall, improving crushing efficiency. Liners are typically made of wear-resistant materials such as high-manganese steel or alloy.
Grate
The grate is located at the bottom of the crusher and serves to control the discharge particle size. The size of the holes in the grate can be adjusted based on specific requirements. By replacing the grate with different hole sizes, products of varying particle sizes can be obtained.
Need Some Help?
Our service team is here to help you 24/7. We can ship you limestone crusher and spare parts, and answer any questions about limestone crusher. Our hammer mill rock crusher can be customized according to your real situations, besides hammer crusher, we also offer other limestone crushers like impact crusher, cone crusher and universal jaw crusher etc. Whatever you need, we are here for you.
AGICO Cement Hammer Mill Crusher Specification
| Name | Model | SPC | Parameters | Capacity (t/h) | Motor power(KW) | Weight (t) | Size |
|---|---|---|---|---|---|---|---|
| Hammer crusher | AGPC-64 | φ600ⅹ400 | Charge<100mm, discharge<15mm | 12-15 | 18.5 | 1.3 | 1935ⅹ110ⅹ1122 |
| Hammer crusher | AGPC-86 | Φ800ⅹ600 | Charge<200mm, discharge<10mm | 18-24 | 55 | 2.5 | 2523ⅹ1525ⅹ1020 |
| Hammer crusher | AGPC-0808 | Φ800ⅹ800 | Charge<50mm, discharge<5mm | 15-20 | 55 | 5.18 | 1590ⅹ1935ⅹ1390 |
| Hammer crusher | AGPC-108 | Φ1000ⅹ800 | Charge<200mm, discharge<13mm | 20-50 | 110 | 6.5 | 3514ⅹ2230ⅹ1515 |
| Hammer crusher | AGPC-1010 | Φ1000ⅹ1000 | Charge<200mm, discharge<13mm | 40-60 | 115 | 7.6 | 2230ⅹ2220ⅹ1515 |
| Impacting hammer crusher | AGPFC-1210 | Φ1250ⅹ1000 | Charge<200mm, discharge<10mm Rotor speed: 730r/min | 60-80 | 130 | 14.4 | 2408ⅹ2247ⅹ2392 |
| Impacting hammer crusher | AGPFC-1412 | Φ1400ⅹ1200 | Charge<250mm, discharge<20mm Rotor speed: 540r/min | 70-100 | 150 | 17.5 | 2500ⅹ2625ⅹ2760 |
| Impacting hammer crusher | AGPFC-1616 | Φ1600ⅹ1600 | Charge<800mm, discharge<20mm Rotor speed: 550r/min | 150-220 | 315 | 34 | 2840ⅹ3380ⅹ3120 |
| Impacting hammer crusher | AGPFC-2018 | Φ2000ⅹ1800 | Charge<800mm, discharge<25mm Rotor speed: 551r/min | 350-450 | 630 | 75.1 | 7400ⅹ3700ⅹ4511 |
| Single-stage hammer crusher | AGTPCD-1412 | Φ14200ⅹ1200 | Charge<600ⅹ600ⅹ900mm, discharge<25mm (residue on sieve:10%) | 70-120 | 185 | 25.39 | 3285ⅹ3104ⅹ3039 |
| Single-stage hammer crusher | AGTPCD-1616 | Φ1650ⅹ1640 | Charge≤800mm, discharge<25mm 95% | 160-220 | 315+5.5 | 41 | 3420ⅹ3300ⅹ3230 |
| Single-stage hammer crusher | AGTPCD-2022 | Φ2000ⅹ2200 | Charge<1500mm. discharge<25mm, spindle speed: 370r/min | 400-600 | 800+45 | 145 | 6000ⅹ5000ⅹ4800 |
