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Sieving- Precise grain separation for oxides, additives and powders

Customized grain specifications are crucial for the performance of many products.
Wester Mineralien offers precise mechanical screening and classification with modern vibration and ultrasonic screens.
Our systems are specialized in the fine screening of oxides - in particular Al₂O₃, TiO₂ and SiO₂ - and enable low-contamination separation down to the finest grain size range below 20 µm.

With controlled process parameters and continuous quality control, we ensure a constant particle size distribution, a defined upper particle size limit (top cut) and high reproducibility - essential for applications in ceramics, additives, pigments and specialty chemicals.

We offer precise mechanical screening and specialize in ultra-fine sieving of oxides, especially Al₂O₃.

Sifting - precise classification and micro-fractionation

For grain sizes below 50 µm, conventional screening processes reach their limits.
Wester Mineralien therefore relies on precise air classification, supplemented by sedimentation and laser measurement processes to separate powders and additives precisely according to particle size distribution and top cut.

Our modern classifying systems enable controlled fractionation with high reproducibility - ideal for ultra-fine grinding, dedusting and narrow particle bandwidths.
This produces defined fractions with stable product properties - perfect for ceramics, pigments, additives and specialty chemicals.

Coating - Functionalization of surfaces for demanding applications

With the right surface coating, particle properties can be specifically adapted and new functions developed.
Wester Mineralien offers the chemical functionalization of powders and oxide minerals by coating them with various silanes and organic compounds.

Our processes improve wettability, dispersibility and adhesion in polymer or ceramic systems - ideal for additives, pigments, fillers and special applications.
We ensure consistent quality and reproducible product properties through precise process control and uniform layer formation.

Dust removal - Purity and process reliability for mineral powders

Too high a proportion of fines can have a negative impact on workability, flow properties and product quality.
With our modern filter and screening technology, we reliably remove dust and fines down to less than 5 µm - both in our own process and as a contract process for external materials and mineral grains.

Our dedusting processes ensure defined grain band widths, uniform product properties and greater process stability in further processing.
This enables our customers to achieve maximum purity, homogeneity and performance - a decisive factor for applications in ceramics, additives, pigments and specialty chemicals.

Drying -  Control of residual moisture for stable processes

Targeted drying is crucial for consistently high product quality.
Our systems minimize residual moisture in mineral powders and prevent clumping or agglomeration - an important step in ensuring flowability, dosing accuracy and process stability.

Through precise temperature and air flow control, we adapt the drying parameters exactly to the respective material - from oxides and additives to specialized powder mixtures.
This ensures reproducible results and optimum preparation for subsequent screening, classification or coating.

Recycling - using resources efficiently and sustainably

Through targeted reprocessing, we improve the product properties of mineral materials and return them to the production cycle in a controlled manner - an important contribution to resource conservation and process optimization.

Our processes combine cleaning, drying, classification and dedusting to make valuable raw materials usable again in consistent quality.
This results in economical and sustainable solutions - technically precise, ecologically sensible and quality-assured.

Grinding/rounding - Optimized grain shape for best processing properties

The grain shape and size have a significant influence on the flowability, dispersion and transparency of powders and additives.
With our precise grinding and rounding processes, we control the particle shape in a targeted manner in order to achieve a uniform grain size and consistent product performance.

Wester Mineralien has state-of-the-art grinding technology - from jet mills (air jet mills) to mechanical rounding processes - and can therefore process a wide variety of material types efficiently and gently.
The result: improved dispersibility, homogeneous particle size distribution and optimized material properties for applications in ceramics, pigments, additives and specialty chemicals.

Filling/packaging

Efficiency through clear processes. We pack your powdered products in big bags, sacks, drums or small containers - exactly as specified, including labeling and logistical preparation.