Cleaners and separators for stone mills

Clean grain eliminates the risk of producing food that is not hygienically safe.

Cleaning needs to be done with great care to remove harmful slags, such as mycotoxins, bacteria, and foreign particles from the surface of each grain, even if the grain is organic.

This step is especially important for whole grain products, as these foods also include the outer part of the grain, the bran, which serves as a barrier, protecting the seed from external impurities.

For its stone mills, Biostonemill can offer you cleaners and separators for wheat, cereals, and pulses which guarantee you a clean product and hygienically safe flours.

BioStoneMill Cleaners and Separators. The cleaner the grain, the safer your business.

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VIBRATING SEPARATOR AND TARARA

Vibrating separator with tarara: it consists of two overlapping vibrating sifters that allow the elimination of impurities of different sizes from the cereal.

The upper sifter filters out impurities larger than the cereal, while the lower one removes shrivelled grains, dirt, and all the smaller impurities of the cereal.

The size of the sifter holes opening is chosen based on the size and shape of the cereal being processed.

The cereal thus sifted passes then through an air flow in the tarara, which removes lightweight particles like shriveled grains and straws.

For processes that handle multiple types of grains, additional sifters can be used, each suitable for a specific type of grain.

The vibrating motion is guaranteed by two motorised vibrators that keep the sifters in motion.

DESTONER

The main purpose of this machine is to remove stones which, being similar in size to the cereal, were not eliminated by the separator.

The machine works on the principle that, for the same size, stones are much heavier than the cereal (due to the difference in specific weight), and can therefore be separated thanks to a combination of a mesh and an airflow.

The movement needed to shift the product across the work surface is generated by two motorised vibrators.

SCOURER MACHINE (TRIEUR)

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DATASHEET DOWNLOAD

The indent cylinder for small seeds (trieur) is equipped with a replaceable outer shell. The indent cylinder enables the separation of products into two fractions based on different lengths and sizes.

It consists of a rotating outer shell on which indent niches have been created, appropriately shaped to obtain maximum efficiency, and into which bodies of a length shorter than the diameter of the niches themselves enter.

These shorter bodies, due to the rotation, are discarded onto a vibrating channel that conveys them into a bag, while the “good” product is conveyed, through another vibrating channel, towards the downstream process.

Features included:

discharge of the “good” product into a bag
waste discharge
discharge of the “good” product to the downstream process
sampling point

The vibrating waste conveyor channel is adjustable (inclination around the axis of the cylinder) to enable the separation point between the two fractions (“good” product and waste product).
Various combinations of single or stacked cylinders in series allow to realize different working diagrams to meet every requirement.

Here are the main features that distinguish BioStoneMill’s indent cylinders

CONSTRUCTION
modular in normalized electro-welded steel that allows assembly in various combinations, enabling any working diagram.

MECHANICS
the bearings never come into contact with the product, and the internal components do not require lubrication.

INDENT SHELLS
made of steel and divided into three easily replaceable parts, with pocket-shaped indents spaced closely together, with diameters ranging from 1.5 to 20 mm.

MOTORIZATION
gear motor with parallel shaft gears and reaction arm.

TROUGH ADJUSTMENT
simple and precise with a worm screw, worm wheel, and direct indication of the
trough position.

DUST LEVEL
completely enclosed construction, prepared for a suitable suction system.

NOISE LEVEL
possible insulation with sound-absorbing material that allows to respect the in-force regulations.

HULLER

Dehulling means removing the Epicarp of the cereal to ensure maximum cleanliness and prevent serving a product contaminated by external elements and mycotoxins, which, if ingested, could cause acute or chronic health issues.
A grinding wheel removes the outer layer of the grain and prepares it for grinding into flour.
The motor drives the grinding wheel, while a fan removes the waste (Epicarp).

WHEAT CARYOPSIS

COMPLETE CLEANING UNIT

A solution in just 9 m², which also ensures wide access for maintenance.

The cleaning unit, including the Vibrating Separator with Tarara, Destoner, Scourer, and Huller, is completed with:

Receiving hopper
Magnet
Dosing screw
Elevating screw
Flowmeter

VIBRATING SEPARATOR AND TARARA

DESTONER

SCOURER MACHINE

HULLER

RECEIVING HOPPER

Made of carbon steel (stainless steel 304 optional).
Equipped with level sensors and floor support legs.

MAGNET

Used to capture magnetic impurities and prevent them from contaminating the ground products.

DOSING SCREW

Dosing screw for feeding the separator and the huller

ELEVATING SCREW

Elevating screw connecting the cleaning machines

FLOWMETER

Device for measuring the amount of cereal or pulses at the intake.

BUCKET ELEVATOR

HEAD
With control gear motor.

FOOT
With product infeed, turnbuckles, openable bottom with shutter for cleaning, and electronic speed control device applied to the driven shaft.

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