When to Use maize hammer mill？

In our previous article, we broke down the basic component of Roff’s crushers – how they work, how they can be applied and their advantages. See the full article here. In this article, we discuss the second option available to millers: hammer milling.

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Hammer mill uses

Hammer mills in general can be used to mill almost anything from grains to glass and even plastic. Alternatively, they are used by municipalities to reduce the size of household waste and are very helpful in managing a compost heap around the house. The hammer mill is a nuisance free method of milling and if designed with a specific application in mind, it can mill almost anything that is thrown at it. Because of the simple operation and basic design, the hammer mill is a very cost-effective machine to use.

Roff 100 Hammer mill with electric motor

How hammer mills work 

Hammer mills consist of a rotating shaft with hammers attached to it. The hammers rotate at a reasonably high speed close to a milling chamber that is equipped with a screen. The main product is fed into the milling chamber and the hammers mill the product until it has reached a size that is small enough to escape out of the milling chamber through the screen. If the operator wants to change the size of the product, the size of the screen must be changed. Within certain criteria, the same hammer mills can be used to mill grain as well as plant materials such as lucerne.

In this aggressive milling process a large percentage of the product will be reduced to a size that is much smaller than the screen size that has been installed in the milling chamber, resulting in a product that is not very homogeneous. If the desired product is very fine, usually below 500 microns, this should not be a problem. However, if the desired product must be, for example, smaller than 2 000 microns, but the feed expert doesn’t want a large percentage below 500 microns, a hammer mill is probably not the best option.

It’s also worth considering that hammer mills are commonly considered to be energy guzzlers and can cause a fairly large kW/ton energy product ratio if not monitored closely. These mills may also be dusty and create an unfavourable working environment if not applied correctly. In spite of this, the hammer mill has its place in milling and is effective when used in the right environment and for the right job.

Roff hammer mills for sale 

In regions that prefer very fine maize flour, like Angola, Tanzania and Uganda, hammer mills are traditionally considered more cost-effective at producing a fine meal compared to roller mills. Roller mills, in turn, are better known for producing coarser flour. But which is the most profitable in the long run?

 Both hammer and roller mills have their advantages. A combination of both can maximise production capacity and cost-effectiveness, and removing anything from product that went through a hammer mill is very difficult.

 After the degermination stage, a roller mill will prepare your maize meal for final milling by the hammer mill. This process will give you an enhanced product and vastly improve your extraction rate and profitability by balancing the process so that each machine, hammer mill and roller mill, can play to their strengths.

If you are looking for more details, kindly visit maize hammer mill.

Here's how:

 STEP 1: Degermination to increase quality

Germ and bran are removed from the maize kernel during the degermination stage. But because maize kernels are not all the same size, a degerminator will leave a small percentage of bran, even at its optimal setting. Removing this bran is key to improving your maize meal quality. 

STEP 2: Roller mills with screens to increase extraction 

In this process the bran is effectively cut away from the endosperm and separated from the maize meal by a combination of rollers and screens, extracting the maximum flour and only passing the product that you want in your end product to the hammer mill.

STEP 3: Large capacity hammer mills

Hammer mills are far better at producing a fine product, as they cannot do any product separation, so effectively what you put in, only comes out when it reaches the desired size. Since the product it receives from the roller mill stage is made up of the same size and type of product, the hammer mill can mill at very large volumes using less electricity, as it’s not working as hard.

If you want to learn more, please visit our website Maize Milling Machine for Sale.