Impact Mills

We supply impact mills or complete milling lines for food and ceramics to the micro and nano scale. The offered milling plants include systems for storing and feeding the product to the mill, receiving the milled product, as well as screening oversize and returning it the mill. We also provide a system for transporting the product between individual devices, as well as a dust extraction plant. When the milled product is flammable and thus generates a risk of explosion, the mill or the entire plant is adapted to the requirements of the ATEX directive.

We also supply cryomilling plants using liquid nitrogen or dry ice. This technology makes it possible to cool the milled product so that to increase its fragility. This is particularly important in the case of melt, flexible, ductile or fibrous materials which cannot be milled effectively by traditional methods. An additional advantage of introducing inert gas (N2 or CO2) into the system is the reduction of oxygen in the installation, which in the case of grinding combustible products reduces the risk of explosion. In the case of milling herbs, cryomilling preserves up to several dozen percent more essential oils.

Contact our engineer

+48 12 2018 100

info@grupa-wolff.com

We will answer questions about: offer, technical specification, delivery, assembly.

Impact Mills – Examples of Equipment

Turbo mill

PERFECT WHEN YOU Are looking for a device for fibrous products Want to adjust the particle size at discretion Require a homogeneous grain size of the product

Blade mill

PERFECT WHEN YOU Are looking for a device that does not produce oversize grain Want to eliminate the screening unit from your plant Require a homogeneous grain size of the product

Disintegrating mill

PERFECT WHEN YOU Are looking for single mill for different products Want to grind abrasive products Require simple operation and maintenance

Additional design options

Design in conformity with the ATEX directive
Version designed for the food industry
Cryomilling system

Impact mills – basic information

Pre-delivery tests

In order to ensure that the mill delivered fully meets your expectations, tests are carried out during which the product delivered by you is milled. We test different types of mills, their settings and the selection of milling elements. In this way, we guarantee that you will achieve the intended results under the given process conditions.

An air screener and laser diffraction are used to test the granulometric distribution of the tested products. In this way, it is possible to test the fineness of powders to a level of 0.2 µm.

Scope of delivery

Depending on your needs, we can supply just a mill that meets your expectations or complete a complete milling line. Regardless of the scope of our work, the selection of a mill can be preceded by tests that will confirm the effectiveness of milling. This way you can be sure that the milled product will meet your expectations.

Disintegrating / blade mill or turbo mill (selection can be preceded by tests)
System for storing and feeding the product to the mill
Receipt of the product from the mill
System for oversize screening and returning for milling (not applicable for a blade mill with
an integrated screen)
Close handling system
Dust extraction plant
Explosive safety system (when the milled product is flammable/explosive)
Cryomilling plant (when the product is easily fusible, flexible, ductile or fibrous)

Series of types / Dimensions / Power

Disintegrating mill

Type	Capacity	Motor output	Rotor speed	Dimensions (LxWxH)	Weight
GSM 250	500 kg/h	2 x 22 kW	8900 min -1	135 x 80 x 80 cm	700 kg
GSM 400	1000 kg/h	2 x 38 kW	6700 min -1	188 x 100 x 100 cm	1200 kg
GSM 630	2000 kg/h	2 x 55 / 75 kW	3600 min -1	258 x 120 x 120 cm	2500 kg
GSM 800	4000 kg/h	2 x 110 kW	3000 min -1	90 x 60 x 60 cm	4000 kg

Blade mill

Type	Capacity	Motor output	Dimensions (LxWxH)	Weight
GSK 315	500 kg/h	26 kW	110 x 75 x 90 cm	430 kg
GSK 500	1000 kg/h	37... 45 kW	125 x 100 x 120 cm	750 kg
GSK 630	2000 kg/h	75 ... 90 kW	150 x 120 x 140 cm	1100 kg

Turbo mill

Type	Capacity	Motor output	Rotor speed	Dimensions (LxWxH)	Weight
GWH 250	500 kg/h	25 kW	12.000 min-1	125 x 100 x 100 cm	650 kg
GWH 400	1000 kg/h	52 ... 64 kW	7300 min-1	130 x 120 x 120 cm	1100 kg
GWH 800	2000 kg/h	110 kW	3600 min-1	190 x 180 x 180 cm	2400 kg
GWH 1200	4000 kg/h	185 ... 270 kW	2500 min-1	250 x 230 x 240 cm	4500 kg

Advantages

Advantages of air classifiers

For the food industry, all joints in contact with the product are rounded and smooth
Large manhole for easy access to the mill interior
The machine can be explosion protected (explosion suppression) or delivered in explosion proof version
Smooth rotation control by means of an inverter
Direct drive transmission via coupling instead of V-belts
Possible operation with liquid nitrogen or dry ice (cryomilling)

Impact mills – application

Impact mills are intended mainly for food and ceramic products. Their task is to comminute the product to the micro or nano scale. They are also often used for deagglomeration, i.e. breaking up lumps and clusters of a fine product.