As a leading global supplier of high-quality wollastonite, we take pride in our vertically integrated production process—from responsible mining and precise mineral processing to advanced powder manufacturing. Every step is engineered to preserve the natural acicular crystal structure, maximize purity, and deliver consistent performance for our international clients. This article unveils the complete journey of how raw wollastonite ore transforms into a high-value industrial material.
Stage 1: Responsible Mining & Raw Ore Extraction
Our process begins with selective mining from high-grade wollastonite deposits, renowned for their natural whiteness and ideal crystal formation.
Open-Pit Mining: Utilizing safe, efficient, and eco-friendly open-pit techniques to extract high-quality ore.
Manual & Optical Sorting: On-site hand-sorting and advanced optical sorting to preliminarily reject waste rock and low-grade ore, ensuring only premium feedstock enters the processing plant.
Stage 2: Primary & Secondary Crushing
The raw ore is meticulously crushed to prepare for purification.
Primary Crushing: Large ore lumps are reduced to 100–200mm chunks via jaw crushers.
Secondary Crushing: Further size reduction to 20–50mm using cone crushers, ensuring uniform particle size for efficient beneficiation.
Stage 3: Advanced Beneficiation & Purification
This critical stage removes impurities (calcite, quartz, iron) to achieve exceptional purity.
Magnetic Separation: High-intensity magnetic separators eliminate iron oxides, ensuring ultra-high whiteness (≥93%).
Flotation Separation: State-of-the-art flotation technology selectively separates wollastonite from calcite and other gangue minerals, achieving CaSiO₃ purity ≥96%.
Washing & Dewatering: Thorough cleaning and dehydration to control moisture content and ensure product stability.
Stage 4: Precision Grinding & Classification
Purified ore is milled into powders with strict particle size control.
Dry Grinding: Using vertical roller mills and ball mills to produce standard grades (100–400 mesh).
Superfine Grinding: Jet mills for ultra-fine and needle-preserving powders (up to 6000 mesh, <3μm).
Air Classification: High-precision air classifiers ensure tight particle size distribution (D50/D97 control) and preserve the critical acicular aspect ratio.
Stage 5: Surface Modification & Quality Control
Surface Treatment: Optional coupling agent modification for enhanced compatibility in plastics, rubber, and coatings.
Rigorous QC: Every batch undergoes testing for whiteness, purity, particle size, and aspect ratio in our ISO-certified laboratory.
Stage 6: Packaging & Global Delivery
Packaging: Moisture-proof, 25kg/50kg PP bags or jumbo bags for safe long-distance transport.
Warehousing & Shipping: Modern warehousing and efficient logistics to ports, ensuring on-time delivery worldwide.
Our Commitment to Quality & Sustainability
Our full-process control guarantees high purity, high whiteness, high aspect ratio, and consistent quality—key properties demanded by global industries. Operating under ISO & Reach standards, we prioritize green production with energy-efficient equipment and zero-discharge processes.
Partner with a Trusted Wollastonite Producer
By controlling every stage from mine to market, we deliver reliable, high-performance wollastonite for plastics, ceramics, paints, metallurgy, and automotive applications.Contact our export team today to discuss your custom wollastonite specifications.
