Company advantages
Advanced Equipment
The quality of equipment is strictly in accordance with ISO9001 standard and with CE certificate, electrical meets UL certificate.
Professional Team
CEO holds a graduate degree in mechatronics and is dedicated to research in mechanical design, PLC applications, and microcontrollers. His scientific work involves the design of production lines and automation programs for mechanical equipment, and he has obtained multiple patents.
Rich Experience
We have been in this field for more than 15 years. I am very familiar with raw material processing and production processes and technologies.
Our Services
Provide clients one-year warranty to make sure the machine work well.Act as a good adviser and assistant of clients to enable them get rich and generous returns on their investments.
A hammer mill, also known as a pulverizer, is designed to mill, grind and crush material. These mills have been in use for much of human history and function by using hammer blows at high speed to grind material. The material is shattered and disintegrated by the internal hammer. A hammer mill contains a cylindrical steel drum. Inside this drum, hammers are mounted on a vertical or horizontal shaft. The hammers inside this drum rotate around their axis.
Benefits of Hammer Mill
Versatility
A hammer mill can grind and crush different types of materials at high angular velocity. It can be used for primary, secondary, or tertiary grinding, and size reduction of materials can happen dynamically.
High reduction ratio and capacity
Regardless of whether it is used for primary, secondary, or tertiary grinding, a hammer mill offers high reduction ratios and capacity. This means that it can efficiently reduce the size of materials and handle large quantities of material.
Choice of hammers
Hammer mills can use either hard or soft hammers. Hard hammers impact the material with a flat surface, leading to greater particle size reduction and wider particle size distribution. Soft hammers use sharp, knife-like edges to slice apart the material, achieving less particle size reduction but a narrower particle size distribution.
Overcoming non-friable materials
One potential drawback of using a hammer mill is when the material itself is not intrinsically friable, meaning it won't easily crack under the application of force. However, intrinsically friable materials usually have microscopic defects, like fractures or gaps, which act as natural places along which cracks can propagate, allowing the material to break apart.
Laboratory scale hammer mills
There are laboratory scale hammer mills available for small production, sampling, and lab testing. These compact and rugged hammer mills offer flexibility and scalability while producing results comparable to high production models. They are ideal for pilot projects, university labs, and government testing facilities.
Minimal risk of contamination
Hammer mills do not use knives, blades, hammers, milling media, or screens, which means there is minimal risk of contamination from worn mill parts. This is important for applications where contamination needs to be avoided, such as in the cosmetics industry.
Application of Hammer Mill
Food product grinding
One common application of hammer mills is food product grinding. You can use this hammer mill to grind several varieties of legumes, such as groundnuts, soya nutshells and beans. A hammer mill that has low hammer blows can remove hard nutshells.
Dissolution
A hammer mill can be used for quick dissolution in the pharmaceutical, food and chemical industries. During the process, small particles can dissolve more quickly for fast formulation.
Energy source reduction
Use hammer mills to reduce fuel sources like biofuels, biomass, corn, coal and wood.
Powder production
Several types of hammer mills can be used for powder production in the chemical and pharmaceutical industries. In a hammer mill, the required ingredients are crushed to form an intermediate grade of powder and precise grain size.
Material size reduction
Hammer mills can also be used to reduce material size, such as medicinal grains. These grains need to be packaged in a capsule in a precise quantity.
Recycling and scrapping
Additionally, a hammer mill can be used for recycling and scrapping purposes, especially in the mechanical and automobile industries. Irreparable automobile parts can be crushed and hammered before being sent for melting. This molten material can then be used for recycling and new production.
Types of Hammer Mill
Lump Breakers
The design and functionality of Lump Breakers are very different from other hammer mills. Its purpose is not to reduce the particle size but to grind the material into paste or powder. They are used to break lumps of materials like chunks of bonded chemical salts, clinker ash, lime chunks, and other similar breakable brittle materials.
Pneumatic Discharge Hammer Mills (PDHM)
The chamber walls and hammers of a pneumatic discharge hammer mill is thin compared to gravity discharge mills, even though they have similar functions. PDHM has a plate dashboard that helps with material size reduction, while the air evacuation process used for discharge helps enhance the overall output. This type of hammer mill is well-suited for lighter materials like paper, greenwood, biomass, etc.
Gravity Discharge Industrial Hammer Mills
This hammer mill makes use of swinging hammers, mounted on a shaft. The process of particle size reduction takes place by the hammering application, plus via the particle-on-particle force. The discharge in this mill is at the bottom, which is subjected to gravity. This is why it is called a bottom discharge or gravity discharge hammer mill. These machines are primarily used for crushing glass, ceramics, dry chemicals, etc.
Full Circle Screen Hammer Mills
These industrial hammers feature a 300-degree rotating screen that contributes to improving particle evacuation. They are best suitable for lightweight components that do not need initial grinding. These hammer mills are used for hammering spices, grasses, etc.
Horizontal In-Feed Hammer Mills
Designed to insert materials from the side rather than the top, these mills have powerful functions and are therefore used for heavy particle grinding. These hammer mills feature trim scrap grinders and pallet grinders that help with hardcore industrial grinding.
Components of Hammer Mill
Feeding Mechanism of Hammer Mill
Through the feeding mechanism, feed particles that need to be crushed/ground are entered into the crushing chamber. Depending on how a hammer mill is designed (or for what purpose), the machine may use a gravity or a metered feeding system.
Control Box
The control box (control panel) is a part through which you can control all the activities within the hammer mill. It is an interface between the machine and the operator. From the control box, the operator can adjust the speed at which the mill crushes the material, among other things. The display screen on the control box also allows you to monitor the performance & operation of a hammer mill. Depending on the hammer mill, the control box may have different operational parameters.
Crushing Hammers/Knives
These hammer mill parts are the actual components that crush/grind the material in the machine. The crushing hammer and knives can be in different styles and shapes, depending on the requirement. Mostly, the hammers rotate at a very high speed that could range from 2000 to 6000 rpm. As mentioned above, the speed of the hammer can be controlled through the control panel (control box). The hammers can rotate either in a clockwise or anticlockwise direction, relying upon the course of the rotor turn.
Pulverizer Screens
The pulverizer screen is used after the process of crushing feed material is completed. Here, the raw (crushed) material is collected and passed through a screen that helps filter the fine material from the coarse material. The type of pulverizer screen used depends on the size of the crushed particles and the desired particle reduction size (output) required.
How to Choose Hammer Mill
Know Your Material, Master the Mill
The first rule of hammer milling is to understand your material. Is it fibrous, like hay, or brittle, like coal? Does it hold moisture like fruits or boast impressive hardness like rocks? Each material demands a specific hammer mill configuration. Look for machines designed for your material type, such as dedicated food-grade mills for spices or heavy-duty crushers for minerals. Don't just stop at broad categories. Consider factors like material density, abrasiveness, and even stickiness. For instance, sticky materials might require special hammers or screen designs to prevent clogging.
Capacity Counts
Imagine this scenario: a mountain of materials awaits, your production line hums, and your trusty hammer mill machine sputters out. Such a situation would be unfortunate, right? That's why we say: Don't get caught in this capacity crunch! Accurately estimate your throughput needs. Choose a machine that comfortably exceeds your average hourly or daily requirements, accounting for wear and tear that can impact output. Consider potential future growth and adjust your capacity needs accordingly. Choosing a slightly larger machine now can save you the hassle and expense of upgrading later.
Size and Shape Matters
The desired final particle size is your hammer mill machine's ticket to fame. Screens with varying mesh sizes determine the output, but hammer configurations also play a vital role. Consider factors like the number of hammers, their weight and shape, and the rotor speed. Some mills offer adjustable settings for fine-tuning your particle size, adding extra versatility. Hammer design matters! Opt for hammers with specific shapes, like star-shaped for fibrous materials or flat for fine grinding, to optimise performance for your material.
Power Up for Peak Performance
Power matters! Choose a motor that can handle the demands of your material and desired output. Insufficient power leads to slower processing, higher energy costs, and potential equipment damage. Conversely, oversized motors guzzle energy and add unnecessary expense. Seek a balance that delivers efficient, effective hammer milling. Look for features like variable-speed drives that allow you to adjust motor power based on your needs, saving energy and wear and tear.
The Maintenance Marathon
Hammer mill machines are workhorses, but even the machines need care. Prioritise ease of maintenance when choosing your machine. Look for features like readily accessible wear parts, easy screen changes, and readily available spare parts. Remember, downtime for repairs eats into profits, so choose a mill that's built for easy upkeep. Regular preventative maintenance, like changing hammers and screens at recommended intervals, extends the life of your mill and optimises performance.
Safety First, Always
Safety should never be an afterthought. Ensure your chosen hammer mill machine adheres to all relevant safety regulations and features essential safety measures like overload protection and emergency shutoff switches. Prioritise operator safety with features like guards, dust control systems, and proper noise mitigation. Remember, a safe work environment is a productive work environment.
Comparing Roller Mills to Hammer Mills
Grinding Process
These milling machines may have a similar function, but their structures are very different from one another.A hammer mill contains a drum in which many little hammers are attached to the inside. As the material goes through the mill, the hammers collide with the material. The force of this collision breaks the material down until it reaches the desired size and passes through a screen.A roller mill uses a more controlled mechanism. Grooved cylinders compress and roll the material until it breaks apart. It keeps going until the material is the exact size that you need. These grooved cylinders come in many different shapes and sizes, and it's easy to add or subtract the number of grooves in the machine as needed.
Uses and Applications
Due to the use of collision to break apart the feed and other material, hammer mills have a wide variety of uses. They're capable of grinding down any type of material or feed, including fibrous materials. Hammer mills have no trouble breaking down large materials since the hammers have such a large range of motion within the machine. They're great if you want to create mashes or flours with your material.Roller mills, on the other hand, can't handle larger materials since those particles are unable to fit between the cylinders. You'll need to break the material down beforehand to get it to fit inside the machine. Roller mills are exceptional at grinding many types of particles but cannot break down fibrous materials. The motion of the cylinders causes the fibers to get caught in the grooves of the machine.
Milling Results
The biggest difference between these two machines is the resulting feed or ground material.Hammer mills are a less precise machine since the hammers swing into the material. It's not possible to make the material the same shape and size with every impact. This gives you a varied result, which isn't a good choice if you're trying to follow a certain regulation or standard. However, hammer mills can give you very fine results, since the hammers can keep hitting the material until it's crushed into a fine powder. Roller mills can only go as fine as the grooves in the cylinders allow.
Milling Capacity
One of the best benefits of hammer mills is the amount of material they're able to process at one time. Their drum capacity allows them to grind down large quantities of material without any trouble.Roller mills have a smaller capacity since the cylinders have less space between them for the material to fit. It'll take more time to process the same amount of material in a roller mill compared to a hammer mill.
Product Separation
A hammer mill is great at processing large amounts of material but it has no capability of separating the material during the grinding process. This makes it difficult for businesses that need to separate certain parts of the material. The ground materials all go through the same extraction process and gather as one product in the end.Roller mills are a perfect choice if you need to separate your product. It's easier for the rolling mechanism to move the material through a mesh that catches and separates the material during the process.
Hammer Mill Working Principles Explained
Feed chute
The process starts with the feed chute, which feeds particles into the machine. Most hammer mills have gravity-fed chutes, but some have feed screws to provide more control over how much material goes into the grinding chamber.
Spinning drum
Inside the grinding chamber, multiple hammers are attached to a drum that spins. As the drum spins, the particles are crushed by repeated impacts with the hammers, walls and other particles.
Sifting screen
A screen at the bottom of the grinding chamber sifts through the pulverized particles. Pieces that are small enough get through, while larger particles keep going through the hammers.
Discharge chute
Particles that are the chosen size or smaller exit the machine through the discharge chute. Hard, heavy materials generally discharge using gravity, but lighter or less dense materials often require pneumatic suction.
Regular Inspection
Conduct routine inspections of the hammer crusher to check for signs of wear, damage, or loose components.Look for cracks or wear on the hammers, rotor, and other critical parts.Ensure that all safety guards are in place and functioning correctly.
Lubrication
Proper lubrication is crucial for reducing friction and preventing excessive wear.Follow the manufacturer's recommendations for lubrication intervals and the type of lubricant to use.Regularly inspect oil or grease levels and top up as needed.
Tighten Loose Bolts and Nuts
Check and tighten any loose bolts, nuts, or fasteners to prevent them from coming off during operation.
Replace Worn Parts
When you notice significant wear or damage to hammers, rotor, or other critical components, replace them promptly.Use high-quality replacement parts recommended by the equipment manufacturer.
Balance the Rotor
A balanced rotor is essential for smooth and efficient operation.If you notice vibrations or imbalance, consult the manufacturer's guidelines for balancing procedures.
Monitor Vibration and Temperature
Regularly monitor the crusher's vibration levels and temperature during operation.Abnormal levels may indicate issues that need attention.
Our Factory
Migreat machinery covers 10,000 square meters, factory area is 15,000 square meters with machining workshop, welding workshop, cold stamping workshop, assembly workshop and electrical workshop. The quality of equipment is strictly in accordance with ISO9001 standard and with CE certificate, electrical meets UL certificate.CEO holds a graduate degree in mechatronics and is dedicated to research in mechanical design, PLC applications, and microcontrollers. His scientific work involves the design of production lines and automation programs for mechanical equipment, and he has obtained multiple patents. Therefore, he has rich experience in the processing and production of raw materials such as powders, particles, tablets, liquids, etc., and can better design and provide more suitable solutions from the perspective of customers.
FAQ
As one of the most professional hammer mill manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy cheap hammer mill made in China here from our factory. Contact us for customized service.
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