Home / News & Blog / Abrasive Blog / What are the issues you have to know about brown fused alumina abrasive?
Brown fused alumina is the most commonly used and medium-priced abrasive grain product. The quality of brown fused alumina abrasive is related to the final quality of the abrasive tool or the performance of the surface treatment process. So how should customers distinguish the quality of brown fused alumina abrasive when purchasing? We will give you suggestions from the following three aspects:
Color: when customers purchase, the most intuitive thing to see is the color of brown fused alumina. High-quality brown fused alumina is generally brown-brown, which looks very transparent and shiny. This shows that the aluminum oxide content is high, the hardness is high, the toughness is strong, and the self-sharpening is good. Medium-quality brown fused alumina is generally dark brown, and the color looks a bit dark and not so transparent. The third point is that because the aluminum oxide content is low and the iron content is slightly higher, the color will be black and look lifeless.
Particle size: the smaller the particle size of brown fused alumina, the lower the alumina content, because there will be impurities or ash produced when screening the particle size, but this is not the main factor in measuring the quality of brown fused alumina. You have to choose the particle size you need according to customer needs.
Chemical composition：such as iron oxide, titanium oxide, and silicon oxide in brown fused alumina. This requires experimental testing to obtain the results. The higher the alumina content and the lower the iron content, the better the quality.
Brown fused alumina can be used as refractory materials, sandblasting and rust removal, polishing and grinding, fillers, castables, etc., but in the application, the uses are different and the particle size required is also different. Next, let’s tell you what are the classifications of the particle size of brown fused alumina.
From the process point of view, the particle size of brown fused alumina is divided into:
Brown fused alumina P sand: It needs to go through water washing, pickling, air separation and other processes. The shape of its sand particles is mostly sharp and sharp like a needle. The stacking density is low and the particle size distribution is relatively concentrated. It is more suitable for coated abrasives, such as sandpaper, sand belt, emery cloth, etc.
Brown fused alumina F sand: Its sand grains are mostly granular or multi-angular, and the stacking density is relatively high. It is more suitable for consolidated abrasives, such as sand discs, grinding wheels, grinding heads, whetstone, etc.
Brown fused alumina W sand: Its sand grains are powdery and have very fine particles. It is more suitable for polishing and grinding processes of ceramic products, precision workpieces or glass products.
From the size, the brown fused alumina grain size is divided into:
Segment sand: 0-1 mm, 1-3 mm, 3-5 mm, 5-8 mm, suitable for refractory materials or castables.
Pure sand: 8#, 10#, 16#, 36#, 46#, 60#, 80#, 100#, etc., suitable for sandblasting, abrasive tools, etc.
Fine powder: 120#, 220#, 240#, etc. is suitable for polishing and grinding, making grinding paste, grinding stone, grinding block, etc.
Micro powder: 325#, 400#, 500#, 800#, 1000#, 1500#, etc., suitable for fine polishing.
Brown fused alumina abrasive has excellent hardness and wear resistance. This makes it an ideal abrasive material that can effectively remove dirt, oxide layers, scratches, etc. on the surface. Whether it is metal, ceramic or glass, brown fused alumina can provide efficient grinding and polishing effects to restore the surface finish and smoothness.
Brown fused alumina abrasive has good thermal properties and chemical stability. This allows it to maintain high hardness and stability under high temperature conditions, and is suitable for the preparation of various heat treatments and refractory materials. For scenes that need to withstand high temperature, high pressure and chemical reactions, such as the metallurgical industry, refractory material manufacturing, etc., brown fused alumina can provide reliable surface treatment effects and protect materials from corrosion and damage.
The shape and size of brown fused alumina grains can be adjusted according to different needs. It can provide particles of different particle sizes, from coarse to fine, to meet various surface treatment requirements. For surfaces that need to be cleaned and ground, coarser particles can quickly remove dirt and irregular areas, while finer particles can be more finely polished and smoothed.
brown fused alumina also has excellent pressure and impact resistance. This makes it widely used in mold manufacturing and repair. For molds that need to withstand high pressure and complex impact, brown fused alumina can provide a solid surface treatment, enhancing the durability and service life of the mold.
Less dust: brown fused alumina is used for surface abrasive treatment. Due to its high specific gravity, less dust is generated during the spraying process. This ensures the health and safety of the operator and improves the visibility of the operator.
High efficiency: brown fused alumina, under a certain pressure, can quickly hit the surface of the object with sharp edges and corners, so it is regarded as a very fast abrasive method.
Low loss: The unique particle size of brown fused alumina ensures that more effective particles hit the surface of the object (such as 30-60 mesh sand, which can produce 11 million particles per kilogram to hit the surface of the object. Conventional slag, such as 20 mesh, can only produce 1 million particles to hit the surface of the object), so the use of brown fused aluminasand can greatly reduce the loss of abrasives – usually saving 1/3 of conventional abrasives.
High surface treatment quality: During the blasting process, brown fused alumina can penetrate into the caves and pits on the surface and reach the bare surface of the metal, so it can thoroughly remove all rust, water-soluble salts and other pollutants.
Environmentally friendly and recyclable: After use, brown fused alumina abrasives can still be recycled and reused.
In summary, brown fused alumina is an ideal, efficient and environmentally friendly blasting material. It is currently widely used in sandblasting, rust removal, optics, electronics, building materials, mechanical processing, instrumentation, instruments, printing, grinding, stone, rubber, hydraulic jet and cutting industries.
DOMILL, as a professional brown fused alumina abrasive manufacturer, is committed to providing you with abrasive grains that meet your various needs.
