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High Alumina Calcined Bauxite | Raw Material for Refractory & Abrasive Industries
1. Introduction to High Alumina Calcined Bauxite
High alumina calcined bauxite is processed by heating natural bauxite ore at sustained high temperatures above 1200°C. The calcination procedure eliminates crystal water, organic substances and volatile impurities inside the ore. After thermal treatment, unstable mineral structures transform into stable mullite and corundum phases. Compared with raw bauxite ore, calcined bauxite boasts higher bulk density, lower water absorption, superior thermal stability and stronger wear resistance.
This mineral material acts as an irreplaceable bulk raw material across multiple heavy industrial sectors. Manufacturers adjust production formulas based on alumina content, iron oxide and titanium dioxide indicators of calcined bauxite to produce qualified end products. Our company provides a complete series of calcined bauxite grades covering Al₂O₃ 60% to 88%, with strict control over harmful impurities such as Fe₂O₃.
2. Core Physical and Chemical Advantages
High-quality calcined bauxite is favored by downstream factories due to its consistent comprehensive performance.
- Stable chemical composition. Strict ore sorting and homogenization treatment reduce component fluctuation batch by batch, avoiding frequent adjustments to customers’ production formulas.
- Excellent high-temperature resistance. The sintered mineral structure maintains stable performance under long-term high-temperature environments, which guarantees the service life of finished refractory products.
- Low apparent porosity and high hardness. These characteristics make it suitable for both refractory production and abrasive raw material processing.
- Flexible particle processing. We can supply lump ore, graded particles and fine powder according to customer requirements to match different mixing processes.
3. Main Industrial Application Fields
3.1 Refractory Industry
This is the largest consumption field of high alumina calcined bauxite. It serves as the primary raw material for manufacturing high alumina bricks, lightweight refractory products, refractory castables, ramming mixes and plastic refractories. Refractory products made from qualified calcined bauxite possess strong slag erosion resistance and good thermal shock resistance. Such refractories are widely installed in hot blast stoves, cement rotary kilns, ceramic tunnel kilns, metallurgical furnaces and waste incineration equipment.
3.2 Abrasive Manufacturing Industry
High-grade calcined bauxite is the main raw material for producing brown fused alumina. After electro-fusion and crushing processing, fused alumina particles are made into grinding wheels, abrasive belts and polishing powders for metal cutting, grinding and surface treatment.
3.3 Construction and Anti-slip Engineering
Medium-grade calcined bauxite with high hardness can be processed into anti-slip aggregates. It is applied on road surfaces, factory floors and stair surfaces to improve friction performance and enhance safety under wet conditions.
4. Product Specifications Available
Henan Hongtai Kiln Refractory Co., Ltd. supplies diversified specifications to satisfy different production demands.
- Grades: Calcined bauxite with alumina content 60%, 65%, 70%, 75%, 80%, 85%, 88%
- Forms: Bulk lumps, graded granular materials and fine powder
- Custom service: Custom particle size distribution can be produced following clients’ technical standards.
Every shipment will go through sampling inspection before delivery. We can provide chemical composition test reports to support customers’ quality inspection and import customs clearance.
5. How to Choose Suitable Calcined Bauxite Grade
Different application scenarios require corresponding bauxite grades.
For high-temperature refractory products used in metallurgical hot blast stoves, customers are recommended to select high-alumina grades with low iron content. For common castables and general kiln lining materials, medium alumina grades can effectively control production costs. For abrasive production, strict limits on iron oxide and alkali impurities are required.
Our technical team can offer professional grade selection suggestions after confirming your finished product types, working temperature and target technical indicators.
6. Contact Us for Cooperation
Consistent raw material quality is the foundation of stable finished product performance. If you are sourcing high alumina calcined bauxite for refractory manufacturing, abrasive production or other industrial projects, please contact our sales team. We can provide detailed technical datasheets, product samples and formal quotations.
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