Different Types of Brown Fused Alumina

  • Friday, 10 February 2023
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Different Types of Brown Fused Alumina

Brown fused alumina is an ecologically clean and hard material that is widely used in the production of abrasive products such as sandpaper, grinding wheels, cut-off wheels, and blasting media. It is obtained mineralically while fusing bauxite in an electric arc furnace. It has a high refractoriness, is extremely tough and durable and is produced to the customer's specifications.

Different Types of Brown Fused Alumina

The abrasives manufactured from brown fused alumina are made up of grits with various sizes ranging from macrogrits to microgrits and powders. These grits are used in many abrasive applications such as refractory shapes, ceramics, metal preparation, laminates, coatings, lapping, polishing and grinding.

A large variety of abrasives are available, but the most common abrasives consist of various grits of alumina. These grits are mainly brown, white, pink (less than 0.5% chromia), ruby (more than 1.5% chromia), and blue fired (heat-treated).

Some of the abrasives have higher abrasion resistance, but they also have higher mass loss when subjected to high-temperature impact. This effect is mainly due to the presence of impurities such as Fe, Ti, Ca, and Mg on the surface of the grain which reacts with bond under high temperature.

These impurities lead to the appearance of cracks, pores and crystals on the reaction interface between abrasive grains and bond. This results in a reduction of the strength of abrasive wheel, especially when abrasive grains are not properly treated or coated.

In addition to the different abrasive types, there are a wide variety of raw materials used for the manufacture of abrasives. These include silicon carbide, natural and synthetic diamonds, cubic boron nitride (cBN), and other abrasives.

The abrasive market has a strong dependence on the quality of its raw materials. In particular, abrasive grits of brown and white fused alumina are the most important raw materials for the production of sandpapers and grinding wheels.

Saint-Gobain Abrasive Grains produces a variety of brown fused alumina grits for various abrasive applications such as fine grit grinding wheels, brake lining filler and general industrial application. The microgrits are processed into precise particle sizes for specific abrasive applications and can be made to customer's specifications.

Some of the abrasive types are more effective than others at certain work areas or tasks. These include the cutting of steel and aluminum, and the removal of corrosion. Some abrasives are also used to erode and remove paint or coatings.

This type of abrasive is very useful for the cutting of metals such as copper, iron and steel with high tensile strength. It is characterized by its high toughness, excellent thermal properties, and sharp edges.

It is also used for abrasive blasting and surface hardening. It is used in various industrial processes such as construction of concrete paving, road building and railways.

Among all the abrasives, brown fused alumina is more suitable for grinding the high tensile strength steel materials.

The abrasives manufactured from brown alumina are generally tough and sharp, with a high abrasion resistance and a low level of impurities. They are also resistant to the environment and can be recycled.

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