Acicular wollastonite
Natural wollastonite is widely used as a multi-purpose raw material. The needle shape of wollastonite grain determines that its main application direction is to be used as micro particle filler.In view of the deteriorating environmental conditions, it is necessary to point out that wollastonite is a substitute for carcinogens such as asbestos and talcum powder.In the papermaking industry, it can also be used to partially replace plant fiber.Wollastonite has great covering ability, which enable it to partially replace titanium dioxide in various fields of industry. It can also be used as ceramics, heat insulation materials, sealing friction materials, paints, coatings, engineering plastics, etc.
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Description
| Index item | Specification standard | ||||||
| W 60 | W 100 | W150 | W200 | W300 | W400 | ||
| Mass fraction,% | |||||||
| SiO2, ＞ | 51 | 51 | 51 | 50 | 50 | 50 | |
| CaO, ＞ | 44 | 44 | 44 | 45 | 45 | 45 | |
| Fe2O3, ＜ | 0,3 | 0,3 | 0,3 | 0,3 | 0,3 | 0,3 | |
| Al2O3, ＜ | 0,6 | 0,6 | 0,6 | 0,6 | 0,6 | 0,6 | |
| loss on ignition，5,＞ | 2,5 | 2,5 | 1,9 | 1,5 | 1,5 | 1,5 | |
| Volume density , g/см3, ＜ | 0,76 | 0,80 | 0,85 | 0,85 | 0,88 | 0,90 | |
| 0,38 | 0,42 | 0,42 | 0,42 | 0,44 | 0,46 | ||
| Sedimentation rate | 200ml//30g,＞ | 60 | 65 | 70 | 75 | 80 | 85 |
| Granularity composition, % | In accordance with the requirements of customers | ||||||
| Usage | Used as micro reinforcing filler, ceramics, insulation materials and sealing friction materials | ||||||
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