How to choose the right type of hammer mill grinder?

When you want to buy a hammer mill grinder to process wood and crops, you can ask yourself the following questions for reference.

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What raw materials do you want to crush?

• To crush grain feed, you can choose hammer mill with the feed hopper on the top.
• To crush wheat and bran cereals, you’d better choose disc mills.
• To process mineral feed like shells, you can choose non-sieve grinders.
• The pretreatment of mixed feed requires small and adjustable particle sizes, you should choose special type of non-sieve grinder.
• If you want to crush different kinds of materials, such as grains and crop straws, you can choose tangential feeding hammer mill grinder. 

What's you required production capacity?

Generally, on the instruction and nameplate of the hammer mill grinder labels the capacity rating. But you should be clear that the rated capacity is under standard condition. For example, the standard of grain hammer mill is when the moisture content is around 13%, the screen mesh diameter is 1.2mm. This is the smallest screen mesh with low production. You should consider these factors when buying.

The production capacity of the hammer mill you choose should be a higher than your demand. Once the production drops due to hammer wear or air duct leakage, the production capacity would decrease.

What’s the power of the hammer mill grinder?

On the instruction and nameplate of the hammer mill grinder usually labels the rated power of the electric motor. It is not a fixed number but a certain range. The required power varies with different raw materials. For example, under the same working condition, the required power for crushing sorghum is 1 time more than that of corn. Besides, with different size of screen mesh, the load of the hammer mill are varied.

How much electric power does your hammer mill consume?

In some areas, the government stipulated the least energy efficiency ratio for production. For example, when grinding corns with 1.2mm screen mesh, the output per KWH shall not be less than 48 kg. Nowadays, most hammer mills have their energy efficiency over the required level. Some superior hammer mills have achieved 70-75kg per KWH.

How are your raw materials discharged?

The crushed materials are discharged in 3 ways: self-weight, negative pressure suction, and mechanical transport. Small hammer mills usually adopt self-weight discharge method. Middle-scale type are usually equipped with negative pressure suction device, which can absorb moisture from the materials. To lower the moisture content of raw materials will increase the grinding efficiency by 10-15%, lower the dust degree in the crush chamber, and facilitate storage.

How mush dust and noise the hammer mill generates?

In a feed pellet plant, most dust and noise come from the hammer mill. You must take these sanitation factors into consideration. If you have chosen hammer mills with high noise and dust generation, you have to take noise and dust prevention method to improve the working environment.

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If you want to learn more, please visit our website maize hammer mill.

What affects the production efficiency of hammer mills?

To choose the right type of hammer mill grinder, the most important parameter is the production efficiency. Different hammer mills varies a lot in production efficiency, which is affected by the following factors:

Raw material moisture content

Crop straws with high moisture content has high tenacity and hard to crush. The moisture content would increase the viscosity of the raw materials and reduce their fluidity, so as to lower the output speed and the production efficiency.

The diameter of the crushing chamber

Reasonable crushing chamber size can increase the working efficiency of hammer mill. The diameter of crushing chamber should adapt to the raw materials and the sieve mesh size.

Spindle speed

Within certain range, the higher the spindle speed, the higher the production efficiency. But once the spindle speed surpass the limit value, the production efficiency would drop. In the empty return stroke, if the spindle rotates too fast, the hammers will swing at high frequency. The raw materials have very short time to pass, so the crushed materials cannot be expelled successfully, and block the crushing chamber. By contrast, low spindle speed would cause the slow swing of hammers, so the raw materials can’t be fully crushed.

Routine maintenance

Good operating condition is the premise of high production efficiency. As a crushing equipment, the high working intensity will accelerate the abrasion of core parts. Therefore, the user should inspect and maintain the hammer mill regularly, so as to ensure the production efficiency and prolong the working life.

Standardized operation

The operator of the hammer mill need professional training, and have a comprehensive understanding of the equipment. Operating the hammer mill in accordance with regulations can ensure the safety of labors and the equipment.

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West Central WisconsinCurrently designing a commodity shed. Looking at 3 bays 32' deep. Not sure of bay width. Back wall 12' total height and a 3 or 4/12 monoslope roof. One bay will be used to grinding our dry corn through a hammer mill we are buying. I am having troubles deciding how I will feed the mill. I have added some pictures of the site by the bunkers where I want it. Also added a picture that was shared with me on my idea for the hammer mill mounting. All corn will be coming in via semi. A friend of mine owns the trucks and is willing to park the load here for the night or weekend to get it unloaded. How do you propose to get the corn from the truck to the mill. I want nothing hanging below the mill to get hit, prefer a fairly permanent setup, must be electric, and not block the area between the shed and the bunkers. Area is currently being used to park equipment on. Thanks

Edited by oakridge 7/27/ 10:53




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Cost gets your upfront attention on projects, but before adding a cone bin with a 6" auger to feed my mill I was doing what you are considering. I would load up a wagon of corn setup the auger to the mill and away I went. An electric mill runs smooth when being fed a consistent flow, but bunch corn up or slow it down and it will spike your amps and trip your breakers. I'm only single phase, 3 phase would make this better, but not an option.

As we grew and more rolled corn was needed, setting up and tearing down became a chore so I went and found a used buschell cone bin. Had a crane come set it down on my trailer and followed me home and set it back up on the pad. Now I fill the bin full and when the bay runs short, flip 2 switches and have only tripped the breaker once since going this route, vs every load with the wagon to the auger. Never fails, corn quits running, open the door a little bit and whoosh, down it comes and a slug of corn at the mill. If going this route I would recommend a pto powered unit as it would take the corn away from the semi fast and he can be on his way again. I didn't want the tractor to deal with I guess which is why I went electric.

Also, allows you to buy corn when cheap and a little more room at harvest. Used 8 yards of concrete, bin cost bucks on a sale, came with the 6" auger and motor and crane rental plus labor was about 1.5 a bushel, but now it's handy vs dreadedHow much corn? Like a load a day or a load a week?...

West Central WisconsinA load every other week.

West central OhioI seconda cone bottom bin. A 40 ft hopper trailer is going to take up a lot of real estate in order to be accessible with an auger.

South West MNIf you had a bushel cone bottom that would last you 10 weeks.

You could buy more grain at harvest low. Would not have to set up an auger as often.

Some weeks you might not be able to get a semi around the yard due to mud, blizzards or your buddy is on vacation, sick, needs the truck, weight restrictions, whatever.

If nothing else set it up with the idea of adding a cone bottom down the road.

western iowa,by DenisonI have a frissen 12ft- bushel bin for sale-with long auger-we use to feed are roller mill with 5inch flex auger and used grain leg to fill hopper bin-leg cost $

Edited by garvo 7/27/ 12:56


Beresford, SDYou need a roller mill not a hammer.

West Central WisconsinI have been down this road with my feed guy. Because of all the other stuff we feed, we are looking for a fine even grind that we can get from a hammer mill with screens.

West Central WisconsinShoot me an Gary. is in my profile. Looking for pics of this setup. Thanksif You don’t put in a bin right away you will want to sooner than later because if anyone other than him ever has to bring a load for some reason they won’t like leaving the truck there or taking all day to grind it empty. Even with him it will get old fast. Like Gary’s idea get a short leg even if it’s not super fast or new, it won’t take up much room in the driveway. I set up an auger to unload soybean meal every three weeks, I wish I had a short leg so the trucker could unload himself whenever it works for him to show up so he can get back on the road faster.

Edited by Abomb 7/27/ 14:14
You can get a uniform, fine even grind with a roller mill with with a lot less maintaince.gwfeederswi
Posted 7/28/ 22:09 (# - in reply to #)
Subject: RE: Help me decide how to feed my hammer mill.