NETZSCH Fine Grinding Service

Your Reliable Partner for Toll Grinding

General

You will benefit from our experience

As worldwide leading companies in the field of dry and wet grinding as well as fine classifying and mixing, kneading and dispersing technology we know what matters to you. Our extensive machine programme offers you the right solution for your requirements. Our long-term experience with a diversity of products in these fields, is available for your toll grinding needs

NETZSCH Fine-Grinding Service offers you

Extensive know-how
Qualified staff
A wide choice of machines
State-of-the-art technologies
Certification according to DIN EN ISO 9001:2008

Your advantages

No (overhead) costs
No planning costs
No investment costs
No space requirement
High flexibility
Bridgeover capacity bottlenecks
Highest product quality - repeatedly!
Low risk market introduction of new products

Services

Fine grinding – dry
The fine grinding of dry products is our core competence. Our extensive machine program offers the right solution for nearly all of your tasks. Finenesses of 1 µm (d₉₇) into the millimeter range can be achieved, repeatedly.

Classifying
The CONDUX high-performance classifier type CFS/HD-S classifies finest particle fractions without any problems. Both the separation of undesirable coarse particles (e.g. grit) as well as the clean de-dusting of fine portions down to a range of 1 µm (d₉₇) are possible.

Packing
If you need your final products specially packaged - no problem! Depending on your demand, we pack your products in big bags, barrels, drums or tanks.

Analyzing / Quality Control
The measuring devices installed in our well equipped analysis laboratory are naturally also available to you as an individual service! Particle size determination using laser diffraction measuring devices, screen analyses with air jet- or vibrating screens as well as determination of moisture are all part of our service for you!

Applications / Products

Processing Possibilities

Dust explosive materials
pressure shock resistant plant up to 10 bar or inert with inert gas in gas loop operation

Hard materials
contamination-free jet grinding plants (iron-free)

Temperature sensitive products
jet mills with processing temperatures of < 25 °C

Temperature resistant materials
jet mills in hot gas operation up to 170 °C

Wet preparation
depending on your product and requirement, product finenesses from several µm down to the nanometer range

Product Examples for Dry Preparation

Product	Process	Fineness
Aluminum oxide	Fine grinding - dry	d₅₀ 1.3 µm
Ammonium sulphate	Fine grinding - dry	d₅₀ 15.6 µm
Anhydrite, synthetic	Fine grinding - dry	> 100 µm
Barium sulphate	Classifying	d₅₀ 1.1 µm
Boron carbide	Fine grinding - dry	d₅₀ 1.7 µm
Calcium hydroxide	Classifying	d₅₀ 2.3 µm
Calcium phosphate	Fine grinding - dry	d₅₀ 20.0 µm
Cellulose	Fine grinding - dry	> 100 µm
Cement	Classifying	d₅₀ 2.4 µm
Epoxy resin	Fine grinding - dry / Classifying	d₅₀ 27.1 µm
Glass frits	Fine grinding - dry / Classifying	d₅₀ 3.3 µm
Graphite	Fine grinding - dry / Classifying	d₅₀ 4.8 µm
Iron oxide	Fine grinding - dry	d₅₀ 0.9 µm
Molybdenum	Fine grinding - dry	d₅₀ 3.5 µm
PE wax	Fine grinding - dry	d₅₀ 5.7 µm
Peas	Fine grinding - dry	d₅₀ 22.3 µm
Pea meal	Classifying	d₅₀ 10.7 µm
Phenolic resin	Fine grinding - dry	d₅₀ 1.4 µm
Pigments	Fine grinding - dry	d₅₀ 1.2 µm
PMMA	Fine grinding - dry	d₅₀ 35.0 µm
Powder paints	Fine grinding - dry	d₅₀ 5.6 µm
Quartz	Fine grinding - dry	d₅₀ 0.7 µm
Resin	Fine grinding - dry	d₅₀ 2.6 µm
Silica	Fine grinding - dry / Classifying	d₅₀ 3.6 µm
Silicon	Fine grinding - dry	d₅₀ 1.5 µm
Silicon carbide	Fine grinding - dry / Classifying	d₅₀ 1.2 µm
Sodium bicarbonate	Fine grinding - dry	d₅₀ 5.1 µm
Sodium sulphate	Fine grinding - dry	d₅₀ 1.4 µm
Talcum	Fine grinding - dry	d₅₀ 5.6 µm
Toner	Fine grinding - dry / Classifying	d₅₀ 7.1 µm
Tungsten carbide	Fine grinding - dry	d₅₀ 5.2 µm
Wax	Fine grinding - dry	d₅₀ 1.7 µm

Equipment / Plants

CONDUX CGS Fluidized Bed Jet Mill

The fully autogenous grinding performed by the Fluidized Bed Jet Mill is carried out via a gas stream so that no wear of grinding tools can occur. The settings of a dynamic air classifier integrated into the housing, control the desired final fineness. The grinding method of this mill enables it to break down the hardest of products as well as extremely temperature sensitive Materials, due to the lack of heat development in the jet mill during processing. Finenesses ranging from d₉₇ 1 µm to d₉₇ 70 µm can be achieved.

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CONDUX CSM Classifier Mill

The Classifier Mill combines a mechanical impact grinding tool with an integrated dynamic air classifier. With the help of this air classifier, very fine grain sizes of less than 10 µm can be achieved, without the disadvantages of an external closed loop classifying system. The self-regulating, internal circulation of the coarse material in the classifier mill makes its method of operation not only stable but also energy efficient. The actual grinding process takes place between a peripheral grinding track and the beaters.

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CONDUX CUM Universal Mill

The Universal Mill is a fast rotating impact mill that can be used to break down a large range of products with a Mohs hardness of up to 3 to 3.5. The mill can be "universally" equipped with a diversity of grinding tools designed to fit your application, which makes it possible to operate as a blast mill, pin disc mill (single rotating and counter rotating), beater mill as well as a ridge disc mill. The finenesses that can be achieved with the CUM range between 30 and 800 µm (d₉₉), depending on the product characteristics and grinding tools used.

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CONDUX CS-Z Fine Cutting Mill

Fine-Cutting Mills can be used to pulverize impact resistant, soft, elastic products. The feed product is cut by rotating knives and stationary knives built into the machine housing. In the bottom part of the housing a sheet screen with selectable hole sizes, determines the final size of the product. The most common finenesses range from 0.2 - 1 mm (or larger).

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CONDUX CFS/HD-S High-efficiency Fine Classifier

This High–efficiency Fine Classifier is designed to achieve cross cuts ranging up to d₉₇ 2 µm. Guide vanes positioned around the classifier wheel combined with fresh gas disperse the feed product and short channel it to the classifier wheel. The high number of dispersion points and the short distance to the classifier wheel reduce the possibilities for the product to re-agglomerate.
Additional improvements to the classifier wheel geometry make fines dimensions possible that were not achievable with common air classifiers in the past.

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Analysis Laboratory

We are aware that constant product quality at high standards is a crucial criteria for our customers. To ensure the quality you need, we continuously draw product samples for analysis in our inhouse laboratory during processing. For this purpose, we have the following measuring equipment:

Particle size analysis with laser diffraction
Cilas + Malvern Mastersizer Particle size analysis
Coulter Multisizer
Air jet screen Rhewum
Reciprocating screen Engelsmann
Moisture determination Sartorius
Microscope Leitz with PC-connection
Viscosimeter Haake

Contact

The scope of our services is subdivided between two locations, depending on the technology to be implemented:
NETZSCH-CONDUX Mahltechnik GmbH in Hanau
the dry grinding specialist

NETZSCH-Feinmahltechnik GmbH in Selb
the wet grinding specialist

Both companies, with their longtime experience, are at your service for all of your toll grinding needs.