Kyanite

Description

1. Product Overview
   Kyanite is a high-grade aluminosilicate mineral (Al₂SiO₅) widely valued in high-temperature industrial applications. It is primarily used in the production of refractory materials, ceramics, and specialty glass due to its exceptional thermal stability and conversion behavior at elevated temperatures. Upon heating, kyanite irreversibly expands to form mullite and silica, significantly enhancing strength and resistance in refractory formulations. Its strategic value lies in its ability to improve thermal shock resistance, reduce shrinkage, and extend the service life of industrial linings. In global heavy industries, kyanite is a critical performance mineral that enables efficiency, durability, and cost optimization in extreme operating environments.
2. Key Specifications & Technical Characteristics

• Chemical Composition: Al₂SiO₅ (Aluminum Silicate)
• Grade: Industrial / Refractory Grade
• Al₂O₃ Content: Typically 55–63% (depending on ore source)
• SiO₂ Content: Typically 35–40%
• Physical Form: Granular / Powder / Lump (as required)
• Color: Blue, gray, or white crystalline aggregates
• Particle Size: Customized (200 mesh to coarse lump grade available)
• Density: ~3.53–3.67 g/cm³
• Thermal Behavior: Expands and converts to mullite at ~1350°C+
• Packaging: 25 kg bags, 1 MT jumbo bags, bulk shipment
• Shelf Life: Indefinite under dry, stable storage conditions

3. Core Industrial Applications
   Kyanite is extensively used in refractory industries, particularly in steel, cement, glass, and foundry operations. It is a key raw material in the production of kiln linings, furnace bricks, ladles, and high-performance castables. In ceramics manufacturing, it enhances mechanical strength, thermal shock resistance, and dimensional stability. It is also used in investment casting and specialty glass production where high heat resistance and low deformation are essential. Compared to alternative aluminosilicates, kyanite delivers superior in-situ expansion properties, reducing cracking and improving lifecycle performance of refractory systems, leading to lower maintenance costs and higher operational uptime.
4. Competitive Advantages

• High Thermal Performance: Exceptional expansion-to-mullite conversion improves refractory durability
• Consistent Quality: Strict ore selection and processing controls ensure batch uniformity
• Supply Reliability: Stable sourcing and scalable production capacity for industrial demand
• Cost Efficiency: Reduces refractory replacement cycles and operational downtime
• Environmental Efficiency: Extends product lifecycle, reducing industrial waste generation
• Technical Documentation: Full COA, MSDS, and application support available
• Global Logistics Capability: Efficient bulk handling and export-ready packaging solutions

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT
• Loading Capacity: 20–25 MT per 20’ container (bulk or jumbo bag configuration)
• Packaging Options: 25 kg bags / 1 MT jumbo bags / bulk liner containers
• Delivery Terms: FOB / CIF / CFR available upon request
• Supply Capability: Continuous industrial-scale supply for long-term contracts