Dense fused alumina, also known as dense aluminum oxide, is a high-quality abrasive material made from aluminum oxide. It is produced through a process called fusion, where alumina (Al2O3) is melted and then rapidly cooled to form hard, dense crystals. This results in a material with excellent hardness, toughness, and abrasive properties.
Dense fused alumina is commonly used in various industrial applications, including:
Abrasive Blasting: It is used as a blasting abrasive in sandblasting and shot peening operations to clean, prepare, or finish surfaces. Its hardness and durability make it effective for removing rust, paint, and other coatings.
Grinding and Polishing: Dense fused alumina is used as a grinding and polishing abrasive for metals, ceramics, glass, and other materials. It can produce a smooth and reflective surface finish.
Refractories: In the production of refractory materials, dense fused alumina is used as a raw material. It provides high-temperature resistance and is used in the construction of furnaces, kilns, and other high-heat applications.
Abrasive Wheels: It is a common abrasive grain used in abrasive wheels, including grinding wheels and cutting wheels, for metalworking and other precision machining operations.
Coated Abrasives: Dense fused alumina is used as the abrasive grit in coated abrasives such as sandpaper and abrasive belts.
Ceramic and Metal Matrix Composites: It is used as a reinforcement material in the production of advanced composites, where its high strength and hardness enhance the material's properties.
Catalyst Supports: In certain chemical processes, dense fused alumina can be used as a catalyst support due to its high surface area and stability.
Lapping and Honing: It is used in lapping and honing processes to achieve precision surface finishing in industries like optics and electronics.
Dense fused alumina comes in various grades and sizes, depending on the specific application. The selection of the appropriate grade and size is crucial to achieve the desired results in a given application. It is known for its durability, high abrasive efficiency, and ability to withstand high temperatures, making it a valuable material in a wide range of industries.
 
Dense Fused Alumina is smelted from electric arc furnace with the mixture of technical grade Aluminium Oxide and certain proportion of a reducing agent as raw materials. It is grey in color. It is applied as a kind of high-grade refractory material after cooling, crystallized, crushed and screened.
Application
1. Taphole Clay.
2. Iron and Slag Runner Castables.
3. Steel Ladle Castables.
4. Ramming mixes, preforms and other unshaped refractories. 5. Refractory bricks, purging plug and nozzle seating block.