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Alumina bubble 3-5mm is usually made of high-purity industrial alumina, melted in an electric arc furnace at 2200℃, injected by an air compressor, and then made into alumina bubble products of different specifications according to the particle size of bubble alumina. Alumina bubble products have low apparent porosity, low thermal conductivity, good thermal shock resistance, and high-temperature structural strength. They can be directly built in the lining of the high-temperature kiln in contact with flame, as well as the manufacture of high-temperature furnace tubes, trays, protective covers, etc.
Introduction of alumina bubble 3-5mm：
Industry alumina powder raw materials of alumina bubble 3-5mm are melted in an electric arc furnace at 2200℃. When pouring the melt out, blow the melt with high-pressure air to make the melt dispersed into small droplets. During the cooling process, the droplets form alumina hollow balls due to surface tension effects. The hollow balls are screened to remove fine powder and big fragments and particles. Iron is removed with the magnetic iron. Broken balls are removed with a ball selecting machine. Then the alumina bubble is packed as the finished products.
Properties of alumina bubble 3-5mm:
Application of alumina bubble 3-5mm:
Chemical compositions of alumina bubble 3-5mm:
| Chemical compositions | Index |
| Al2O3 (%) ≥ | 99 |
| SiO2 (%) ≤ | 0.2 |
| Na2O (%) ≤ | 0.25 |
| Fe2O3 (%) ≤ | 0.15 |
| Maximum Working Temperature (℃) | 1850 |
| Granularity (mm) | 3.0-5.0 |
Mohs hardness (according to Friedrich Mohs, 1773 – 1839) ascribes a relative hardness value to certain known minerals on a scale ranging from 1 (talc) to 10 (diamond). Accordingly, a mineral is considered harder than another if it can scratch the latter. Please note that these values merely form an
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According to the FEPA, the bulk density of an abrasive is the quotient of the mass and the volume a grain type poured out in a particular manner will occupy. The bulk density, also called bulk weight, is stated in g/cm3. The rounder the particles, the higher the packing density,
1)for 5~25 tons, it takes around 10~15days. 2)For 26~200 tons,20-40days We will try to deliver it with the promise of quality guarantee as soon as possible
Porosity is defined as the gas proportion (cavity volume) of a particle’s total volume. It can be determined using different measurement techniques, such as gas adsorption and mercury porosimetry. With the same grain size and shape, a lower bulk density corresponds to a higher porosity of the grains.
Yes, of course. The OEM is available. We will do the creation in your requirement and make ur image come true.
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