Shijiazhuang Baifeng Mining Co.,Ltd maintains its headquarters at Lubai Mountain Village, South Yanchuan, Lingshou County, Shijiazhuang City, Hebei, China. As ISO 9001-certified processors of industrial minerals, we've specialized in Kyanite Powder refinement for 18 years.
Contact Technical Team:
Phone: +86 13739764026
Mobile: +86 13739764026
Email: info@baifengkc.com
Website: www.baifengmining.com
Shijiazhuang Baifeng Mining Co.,Ltd produces premium-grade Kyanite Powder (CAS No.:1302-76-7) available in two color variants (grey and white) with mesh sizes ranging from 80 to 325. Our production adheres to ASTM C416 standards for refractory materials.
| Parameter | Specification | Industry Standard | Testing Method |
|---|---|---|---|
| Chemical Formula | Al2SiO5 | ASTM E1621 | XRD Analysis |
| Al2O3 Content | 57-62% | ISO 21068-2 | Chemical Assay |
| Melting Point | 1,425°C (2,597°F) | ASTM D1857 | Thermal Analysis |
| Thermal Expansion Coefficient | 3.0-4.5 ×10-6/°C | ISO 14420 | Dilatometry |
| Mohs Hardness | 4.5-7.0 | EN 14205 | Scratch Test |
| Refractoriness Under Load (RUL) | 1,750°C+ | ISO 1893 | Standard Test |
High-grade Kyanite Powder provides critical performance benefits across industrial sectors:
When calcined, Kyanite Powder transforms into mullite (3Al2O3·2SiO2) achieving 18% volumetric expansion that eliminates porosity in refractory bricks and monolithic linings for blast furnaces (RUL >1,800°C per Journal of the European Ceramic Society).
Added to ceramic matrices at 10-20% loading, Kyanite Powder reduces firing shrinkage by 40% while increasing fracture toughness to 4.5 MPa·m1/2 (Journal of the American Ceramic Society, 2021).
325-mesh Kyanite Powder reinforcement in polymer matrix composites improves ablation resistance in rocket nozzles by minimizing char layer formation rate by 35% (Composites Science and Technology citation).
Kyanite's unique anisotropism enables differential hardness (4.5 parallel vs 7.0 perpendicular to crystal axis) and low thermal expansion characteristics unmatched by andalusite or sillimanite polymorphs (Mineralogical Society Journal).
200-325 mesh Kyanite Powder creates optimal packing density for refractory castables with permeability coefficients <0.5 mD while coarse 80-100 mesh fractions enhance thermal shock resistance (Industrial Ceramics, Vol 41, 2021).
Controlled calcination at 1,350-1,450°C yields 86-93% mullite conversion through topotactic reaction: 3(Al2SiO5) → 3Al2O3·2SiO2 + SiO2 with accompanying permanent expansion that seals microcracks (American Ceramic Society Bulletin).
Grey variants with ≤0.8% Fe2O3 meet standard EN 12485 for sanitaryware while white grades with ≥57% Al2O3 suit technical ceramics requiring CTE < 4.0 ×10-6/K (ISO 6872 standard for dental ceramics).
Quantitative XRD (ISO 20565-3) and ICP-AES (ASTM C322) testing validates kyanite concentrations >98% with regulated limits for deleterious elements: TiO2 < 1.2%, K2O/Na2O < 0.3% to prevent eutectic glass formation.
Air classification and organic flow aids (≤0.3% triethanolamine) achieve Carr Index ≤20° and Hausner Ratio ≤1.25 for pneumatic conveying stability (Powder Technology, Volume 387).
Baifeng's hydro-cyclone processing reduces water consumption by 70% versus conventional methods, with ISO 14001-certified recycling systems achieving near-zero wastewater discharge (Sustainable Minerals Institute reporting).
Baifeng Mining's Kyanite Powder meets or exceeds international specifications including:
Certifications: ISO 9001:2015, OHSAS 18001, China CCC Certificate GB/T 29882-2013
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