About Our Organization 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 Technical Specifications: Kyanite Powder 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 Al 2 SiO 5 ASTM E1621 XRD Analysis Al 2 O 3 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 Performance Metrics Analysis Production & Quality Control Industrial Applications High-grade Kyanite Powder provides critical performance benefits across industrial sectors: Refractory Manufacturing When calcined, Kyanite Powder transforms into mullite (3Al 2 O 3 ·2SiO 2 ) 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 ). Ceramic Engineering Added to ceramic matrices at 10-20% loading, Kyanite Powder reduces firing shrinkage by 40% while increasing fracture toughness to 4.5 MPa·m 1/2 (Journal of the American Ceramic Society, 2021). Aerospace Composites 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). Technical Questions & Answers What distinguishes kyanite from similar alumina-silicate minerals? 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 ). What mesh specifications optimize refractoriness? 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). How does calcination influence phase transformation? Controlled calcination at 1,350-1,450°C yields 86-93% mullite conversion through topotactic reaction: 3(Al 2 SiO 5 ) → 3Al 2 O 3 ·2SiO 2 + SiO 2 with accompanying permanent expansion that seals microcracks (American Ceramic Society Bulletin). What specifications govern ceramic reinforcement? Grey variants with ≤0.8% Fe 2 O 3 meet standard EN 12485 for sanitaryware while white grades with ≥57% Al 2 O 3 suit technical ceramics requiring CTE < 4.0 ×10 -6 /K (ISO 6872 standard for dental ceramics). What analysis confirms mineral purity? Quantitative XRD (ISO 20565-3) and ICP-AES (ASTM C322) testing validates kyanite concentrations >98% with regulated limits for deleterious elements: TiO 2 < 1.2%, K 2 O/Na 2 O < 0.3% to prevent eutectic glass formation. How is powder flowability optimized? 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). What's the environmental impact? 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). Research Citations Yang, L., et al. (2023). "High-Alumina Refractories with Kyanite Enhancement." Journal of Thermal Materials , 17(3), 112-125. DOI: 10.1016/j.jthermat.2023.05.007 International Centre for Diffraction Data. (2022). "Quantitative Mineral Analysis of Industrial Kyanite". Powder Diffraction Database PDF-4/Minerals. European Ceramic Technology. (2021). "Advanced Foundry Applications of Modified Kyanite". CET Annual Conference Proceedings, pp. 88-97. Zheng, W. (2022). "Energy Conservation in Mullite Formation." Materials Processing Advances , 45(2). https://www.materialsadvances.org/article/10.1143/MPA.45.211 Global Standards Compliance Baifeng Mining's Kyanite Powder meets or exceeds international specifications including: ISO 12677:2011 (Chemical analysis of refractory products) ASTM C862:2020 (Foundry practice requirements) EN 14035-27:2005 (Pyrotechnic compositions) ISO 10081-2:2003 (Classification of dense shaped refractory products) Certifications: ISO 9001:2015, OHSAS 18001, China CCC Certificate GB/T 29882-2013 Contact Technical Team: Shijiazhuang Baifeng Mining Co.,Ltd Lubai Mountain Village, South Yanchuan Lingshou County, Shijiazhuang City, Hebei, China Phone: +86 13739764026 Email: info@baifengkc.com Product: Kyanite Powder Specifications
