Wollastonite Uses And Processing Technology


Summary:What Is WollastoniteWollastonite (wollastonite) is a single-chain silicate mineral, the main component is Ca3Si3O9. Triclinic crystal system, usually in the for

What Is Wollastonite

Wollastonite (wollastonite) is a single-chain silicate mineral, the main component is Ca3Si3O9. Triclinic crystal system, usually in the form of flakes, radial or fibrous aggregates. White with slight gray. Glass luster, pearl luster on the cleavage surface. The hardness is 4.5~5.0. The cleavage is parallel {100} complete, and parallel {001} is medium. The intersection angle of the two groups of cleavage surfaces is 74°. The density is 2.78~2.91 g/cm3. It is mainly produced in the contact metamorphic zone of acidic intrusive rock and limestone, and is the main mineral composition of skarn. In addition, it is also found in some deep metamorphic rocks. Used as: raw materials or fillers for papermaking, ceramics, cement, rubber, plastics, etc.; gas filter materials and thermal insulation materials; metallurgical fluxes, etc.

Usage Of Wollastonite

Due to the improvement of processing methods and the acquisition of ultra-fine particles, potential new uses are being discovered one after another, making the use of wollastonite increasingly widespread.


It has a good reinforcing property, which can not only improve the toughness and durability of the coating, but also keep the coating surface smooth and good gloss. Moreover, it improves the resistance to scrubbing and weathering, and can also reduce the oil absorption of paint and ink and maintain alkalinity. It has anti-corrosion ability. High-quality bright color coatings can be obtained, and have good leveling properties and anti-aging properties. The coating can get better mechanical strength, increase durability, enhance adhesion and corrosion resistance. It also has good coverage and adhesion.

Plastic Rubber

It has a unique needle-like fiber, good insulation, abrasion resistance, and high refractive index. It is a good filling material for plastic and rubber products. Features and performance: Wollastonite powder can increase impact strength, enhance fluidity, and improve tensile strength, impact strength, linear stretch and mold shrinkage.


After a special processing technology, it can still maintain its unique needle-like structure, so that the whiteboard paper added with wollastonite powder can improve its whiteness, opacity (covering degree of the surface layer), flatness, smoothness, adaptability, and reduce The quantitative horizontal difference and the wet deformation of the cardboard improve the printing adaptability, and can greatly reduce the usage of other various raw materials, and reduce the cost of paper products as a whole.

Building Materials

It is a kind of non-toxic, tasteless, non-radioactive and other advantages that gradually replaced asbestos which is harmful to human health and become a new raw material for environmentally friendly building materials in the new century. After a special processing technology, it can still maintain its unique needle-like structure, which greatly improves the impact resistance, bending strength, and abrasion resistance of materials such as calcium silicate board and fireproof board added with wollastonite needle-like powder. In the field of building materials, wollastonite will be more widely used.


Add a proper amount of wollastonite powder to the ceramic raw materials to improve the qualification rate of the product.

Wollastonite Powder Processing Technological Process

Phase one: raw material crushing wollastonite blocks will be crushed to 15mm-50mm fineness by crusher.

Phase two: grinding wollastonite material will be sent to the storage hopper by the elevator, and than the feeder will send the material to the main mill for grinding.

Phase three: classifying Ground material will be classified, coarse powder will fall back to the main mill to be ground again.

Phase four: production collecting Qualified powder will flow with the air and be collected in the dust catcher, then the finished powder will be transported to the product storage bin through discharge port. Lastly, the powder will be loaded by tank car or packed by packing machine.

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