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F grit generally exhibits higher loose bulk density than P grit, with coarse F grits approaching 1.99 g/cm³. P grit loose bulk density decreases with finer sizing, from approximately 1.77~1.88 g/cm³ at P10 to 1.48~1.58 g/cm³ at P220.
F grit chemistry varies with grit size: coarser sizes (F12~F80) maintain Al₂O₃ ≥99.0% and Na₂O ≤0.4%~0.5%, while finer sizes (F90~F150) show Al₂O₃ ≥98.5%~99.0% and Na₂O ≤0.5%~0.6%. P grit is controlled within a tighter purity window, typically Al₂O₃ 99.50%~99.7%, with Fe₂O₃ and Na₂O upper limits below those of coarse F grits.
The common bonded abrasive and blasting range for F grit is F12~F220, with microgrits extending to F1200. P grit coated abrasive macro grits are primarily P10~P220, with microgrits extending to P2500. Both are supplied to FEPA or GB/T standards, with particle size distribution controlled accordingly.
F Grit — Bonded Abrasives & Blasting:
Bonded Abrasives: Vitrified bonded wheels, resin bonded wheels, and abrasive blocks. F grit’s high bulk density and blocky grains support molding density and tool strength, suitable for grinding high-carbon steel, high-speed steel, and stainless steel.
Blasting & Surface Treatment: Metal blasting, rust removal, pre-coating surface preparation, and semiconductor surface cleaning where iron residue must be avoided.
Precision Casting & Refractories: Precision casting sand and aggregate or fine powder components in advanced refractories.
P Grit — Coated Abrasives & Precision Polishing:
Coated Abrasive Manufacturing: The core abrasive for sandpaper, abrasive cloth, and abrasive belts. P grit’s sharp needle-like morphology and tight sizing facilitate electrostatic coating and uniform adhesion, yielding tools that cut sharply with low heat generation and high grinding ratios, without reticulated cracks or rust spots after firing.
Polishing Products: Polishing wheels, fiber polishing wheels, and sponge abrasive blocks for surface finishing of metals, glass, and precision workpieces.
Precision Lapping & Superfinishing: Fine P grits are used for ultra-precision lapping and polishing in crystal and electronics applications.
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FAQ
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Q1: Is your company a trading firm or a manufacturing plant? Where are your facilities located?
We are an export-oriented enterprise that integrates manufacturing and sales; we are not an intermediary. Our headquarters—handling international sales, order processing, documentation, and after-sales service—is located in the Liaocheng Economic and Technological Development Zone, serving as the hub for global client relations, order negotiations, and cross-border services. Our production facility is situated in Chiping District, Liaocheng City, and specializes in the R&D, smelting, processing, and testing of white fused alumina, brown fused alumina, and other fused alumina products. This allows us to manage the entire supply chain—from primary production and rigorous quality control to direct export.
Q2: What is your production capacity and supply capability? Can you ensure a stable, long-term supply?
Our production base in Chiping features mature production lines and comprehensive processing equipment, enabling large-scale, continuous manufacturing. We offer a stable supply of our full range of white fused alumina, brown fused alumina, and related fused alumina products. With ample inventory and well-organized production scheduling, we are fully equipped to handle bulk orders, recurring annual orders, and urgent requests during peak seasons, ensuring a reliable, long-term supply for our global clients.
Q3: What are your primary export products, and what are your core offerings?
Our core exports consist of three main series of fused alumina materials: brown fused alumina, white fused alumina, and other fused alumina products. We offer a comprehensive range of specifications and particle sizes that meet various international procurement standards. Brown fused alumina is our flagship product for cost-effective industrial abrasives and refractory raw materials; white fused alumina is designed for high-purity, high-precision grinding and polishing applications; and our broader fused alumina line serves high-end refractory, specialty ceramic, and precision abrasive tool sectors—covering the full spectrum of procurement needs across all market tiers.
Q4: What are the specific applications for these three types of fused alumina, and how should one choose the right product? 1. Brown Fused Alumina: Characterized by high toughness, excellent wear and impact resistance, and a strong price-performance ratio. It is suitable for general industrial applications such as metal sandblasting (rust removal), hardware grinding, the manufacturing of grinding wheels and sandpaper, metallurgical castable refractories, and lining materials for standard industrial furnaces. It serves as a versatile, all-purpose abrasive and refractory raw material.
2. White Fused Alumina: Features high purity, high hardness, and excellent self-sharpening properties, with a pure white appearance free from impurities. It is ideal for high-precision and high-cleanliness applications, including the polishing of precision molds, grinding of aerospace components, finishing of electronic materials, and the production of high-end refractory products and precision ceramics.
3. Fused Alumina (High-Purity/Specialized): Possesses a dense structure, exceptional thermal stability, and high resistance to both heat and corrosion. It serves as a core raw material for high-end, specialized refractories, structural ceramics, precision grinding media, and linings for high-temperature industrial kilns, making it well-suited for demanding, high-performance operating environments.
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