What is the d50 value?
The d50 indicates the mean particle size. d50 means that 50% of particles fall within the specified grain size.
Dense fused alumina fine powder 0-1mm -200 -180 -320
Dense fused alumina fine powder 0-1mm -200 -180 -320, light gray or gray-white powder. The main crystal phase of dense fused alumina is α-Al2O3. The α-Al2O3 content is more significant than 98%; the porosity is less than 4%. It is a new high-purity refractory raw material made using high-purity industrial alumina powder and reducing agent according to a certain ratio in an electric arc furnace after being melted at a high temperature. Dense fused alumina fine powder is the product passing through the finest screen in the refractory sand production line. Dense fused alumina fine powder is characterized by acid and alkali resistance, reasonable wear and corrosion resistance, and volume stability. Furthermore, it is mainly used for metallurgy, ceramics, the chemical industry, etc. It produces blast furnace troughs and castable and high-quality raw material to produce various corundum products.
Introduction of Dense fused alumina fine powder 0-1mm -200 -180 -320：
Dense fused alumina pine powder, with α-AL2O3, as the main crystalline phase, gray, is characterized by high melting point, high bulk density, low apparent porosity, excellent wear resistance, slag resistance, steady volume, and thermal shock resistance. It is an excellent refractory material in the fused alumina series.
Dense fused alumina is fused in the furnace with the industrial alumina as the raw material; it is a new refractory material. Its characteristics are acid & alkali-proof, good grinding performance, erosion-resistant, and steady volume.
Application of dense fused alumina fine powder 0-1mm -200 -180 -320：
- Unshaped refractory materials:
castables, ramming materials, prefabricated refractory parts, etc - Shaped refractory materials:
The refractories products for Continuous Casting
-submerged entry nozzle,
–long nozzle,
–stopper
-breathable brick
-nozzle seat brick - Other applications
-Metallurgy
-Ceramics
-Chemical industry
Chemical compositions and physical properties：
| Item | Fine powder | Typical value |
| Al2O3 (%) ≥ | 99 | 99.4 |
| SiO2 (%) ≤ | 0.7 | 0.5 |
| Fe2O3 (%) ≤ | 0.1 | 0.05 |
| TiO2 (%) ≤ | 0.1 | 0.05 |
| CaO (%) ≤ | 0.1 | 0.05 |
| MgO (%) ≤ | 0.1 | 0.05 |
| Na2O (%) ≤ | 0.1 | 0.05 |
| C (%) ≤ | 0.12 | 0.1 |
| Apparent porosity (%) ≤ | 2 | 0.8 |
| Bulk density (g/cm3) ≥ | / | / |
| True density (g/cm3) ≥ | 3.96 | 3.98 |
Dense Fused Alumina（FAQ）
What is a mesh vs. Grit size?
If you take a (1) inch space and add wires to it, the number of openings within the 1″ space is defined as mesh. For example, if the 1″ space has ten openings for particles to fall through, then that sieve would be called a 10 mesh sieve. Typical sieve
What is grit size?
Grit size typically runs from coarse (16 -24 grit), medium (36 – 60 grit) and fine (80-120 grit). Superfine grits run from 150 and higher. Grinding wheels usually will be between 24 and 100 grit. Honing stones and jointing stones and other polishing abrasives will be 150 grit and higher.
What does the term “flow properties” mean?
The flow behaviour of powders depends on many factors. The following applies in general: Coarser, dry grain types flow easily, but the fine the grains get, the stronger is the impact of morphology and various adhesive forces on the flow behaviour: Van der Waals forces Liquid bridges Electrostatic interaction The
What are the different coated abrasive grain types and their characteristics?
Aluminum Oxide – Aluminum Oxide is brown or reddish in color and a man-made abrasive. It is durable with tough cutting edges. It offers long life and is highly wear resistant even under stress applications. Its applications include aluminum, ferrous metals (including alloy steel), hardwood, and leather. Crocus – Crocus
What is the refractive index of white fused alumina compared with that of glass?
The refractive index of fused alumina is approx. 1.76, whereas that of normal glass types is approx. 1.4. The closer the refractive indices are to each other, the more transparent the system (e.g. varnishes).
Product Category
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