Brown Corundum For Bonded Abrasives

Brown Corundum for Bonded Abrasives: A Premier Refractory and Abrasive Material

Brown Corundum, primarily composed of α-Al₂O₃ with a content exceeding 95%, is an exceptionally versatile industrial abrasive and refractory material. It contains minor traces of elements such as iron, silicon, and titanium, which contribute to its distinctive brown hue and enhance its structural characteristics.

Renowned for its outstanding thermal stability, mechanical strength, and resistance to chemical corrosion, Brown Corundum is extensively used across various high-temperature applications. It serves as an ideal material for bonded abrasives and is widely applied in sectors including steel manufacturing, cement production, and glassmaking. Furthermore, it is considered an essential high-performance refractory material within the chemical industry.

Its superior hardness (9.0 on the Mohs scale) and exceptional grinding capabilities make it a fundamental raw material in the production of grinding wheels, sandpapers, and other abrasive products, playing a critical role in numerous manufacturing processes.

Available Sizes & Specifications:

Section Sand: 0-1mm, 1-3mm, 3-5mm, 5-8mm

Fine Powder: 200#-0, 320/325-0

Grain Size Sand (F/P):
12#, 14#, 16#, 20#, 24#, 30#, 36#, 40#, 46#, 54#, 60#, 70#, 80#, 90#, 100#, 120#, 150#, 180#, 220#

Micro Powder (W):
W63, W50, W40, W28, W20, W14, W10, W7, W5, W3.5

JIS Standards:
240#, 280#, 320#, 400#, 500#, 600#, 700#, 800#, 1000#, 1200#, 1500#, 2000#, 2500#, 3000#

EU Standards (F):
F230, F240, F280, F320, F360, F400, F500, F600, F800, F1000, F1200, F1500

 

Raw Materials: Smelted from bauxite, anthracite, and iron filings

Crystal Structure: Trigonal system

Primary Composition: α-Al₂O₃

Colour: Brown

Smelting Method: Tilting furnace / Fixed furnace

True Density: ≥3.9 g/cm³

Moh's Hardness: 9.0

Melting Point: 2250°C

Grade: First Grade

---

Typical Chemical Composition:

Al₂O₃: ≥95%

SiO₂: ≤1.0%

Fe₂O₃: ≤0.15%

TiO₂: 2.2–2.8%

 

At the heart of our bonded abrasives lies rigorously selected, high-purity bauxite ore. With an Al₂O₃ content of up to 85%, we ensure superior raw material quality from the very source. This foundational excellence guarantees grit that is both hard and consistent, making it ideal for high-performance abrasive applications.

 

We go beyond standard smelting practices by implementing a proprietary double-refining process. Each batch undergoes an additional three hours of refining after conventional smelting, significantly enhancing toughness and grain integrity. This results in brown corundum that delivers better cutting performance, longer life, and greater value in bonded abrasive tools.

 

Post-smelting, our experienced technicians perform meticulous manual screening and grading of every batch. This human-led process ensures precise particle size distribution and eliminates off-spec grain, providing the consistency that your bonded abrasive formulations require.

 

Our advanced processing techniques are complemented by state-of-the-art purification technology. We utilise high-power magnetic separators across five stages to aggressively remove iron and silicon impurities. This results in cleaner, higher-quality corundum with improved performance in precision grinding and cutting applications.

 

Quality is embedded in every step. From expert material selection and process engineering to final inspection, our dedicated quality control team supervises each phase of production. This unwavering attention to detail ensures that every shipment meets the highest standards of reliability and performance demanded by the bonded abrasives industry.

 

Brown corundum, known as the "teeth of industry", is widely used in bonded abrasives for various industrial applications. Its superior hardness and durability make it ideal for:

High-performance refractory materials, including castables and refractory bricks.

Surface treatment applications such as sandblasting of non-ferrous metals, glass, and precision moulds.

Precision grinding of optical glass, lenses, watch crystals, silicon wafers, and semi-precious stones.

Resin-bonded abrasives with excellent edge retention, consistent colour, and optimal fracture behaviour.

Coated abrasives including sandpaper and abrasive cloths.

Functional fillers for automotive brake components, specialty tyres, industrial flooring, and anti-slip surfaces.

Filter media in water treatment systems and drilling mud weighting agents.

Abrasive waterjet cutting for steel, pipelines, and metal components.

 

Q: What are we?
A: Zhengzhou Fanchuang Science and Technology Co., Ltd. is a leading Chinese manufacturer and supplier of high-quality abrasive products. Based in Zhengzhou, Henan Province, we focus on innovation, precision engineering, and strict quality control to deliver abrasives that meet global standards. Our products are trusted in industrial markets worldwide, including Russia.

Q: Do you offer customized abrasive solutions?
A: Absolutely. We understand that different applications require tailored solutions. Whether it's product specifications, grit sizes, or packaging, our team can adapt to your unique requirements. Contact us with your needs, and we'll develop the right solution for you.

Q: Can I request samples before placing an order?
A: Yes, we provide free samples for quality evaluation. Customers typically cover the shipping costs. Once requested, samples are prepared within 1–3 business days for prompt delivery.

Q: How do you ensure consistent product quality?
A: Quality is our priority. From raw material selection to final inspection, every step follows rigorous testing protocols. Our abrasives undergo multiple checks to guarantee durability, performance, and compliance with international standards.

Q: What payment methods do you accept?
A: We offer flexible payment options, including T/T (Bank Transfer), L/C (Letter of Credit), PayPal, and Western Union. Other arrangements can be discussed based on mutual agreement.

Q: Which shipping ports do you use ?
A: Our primary loading port is Qingdao for efficient logistics. However, we can also ship from other Chinese ports upon request to better serve your supply chain needs.

 

Hot Tags: brown corundum for bonded abrasives, China brown corundum for bonded abrasives manufacturers, suppliers, cas no 13775 52 5, resin bonded wheel, onopa-gpf, black paper net, calcium sulphate whisker, tinplate metal ring