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Energy-saving refractory material white corundum 1-3mm3-5mm

Energy-saving refractory white corundum 1-3mm3-5mm White corundum is made of alumina powder as raw material. It is made by melting in an electric arc furnace at a high temperature above 2000 ℃. After crushing and shaping, magnetic separation to remove iron, sieving into various particle sizes, It has dense texture and high hardness, and the hardness of the grains is slightly higher than that of brown corundum, but the toughness is slightly lower, the cutting force is stronger, the chemical stability is good, and it has good insulation.

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  • Energy-saving refractory material white corundum 1-3mm3-5mm
  • White corundum is made of high-quality aluminum oxide powder, which is refined and crystallized by electric melting. It has high purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance, and stable thermal performance. Its hardness is slightly higher than brown corundum, and its toughness is slightly higher. Low, strong grinding ability, low calorific value, high efficiency. It can be used to make abrasive tools, suitable for grinding high-carbon steel, high-speed steel and stainless steel and other fine-grained abrasives; it can also be used for precision casting and advanced refractory materials.
  • Physical and chemical indicators:
    physical propertiesChemical compositioncontent(%)
    crystal hexagonAl2O3≥99.55
    Main crystal: Al2O3
    color: WhiteNa2O≤0.3
    True density ≥3.9 g/cm3
    Bulk density 1.75-1.95 g/cm3SiO2≤0.01
    Mohs hardness 9
    Linear expansion coefficient 8.3×10-4Fe2O3≤0.03
  • Product model particle size comparison table:
  • White corundum grain size sandWhite corundum powder
    Granularity numberParticle size range (μm)Granularity numberParticle size range (μm)
    12#2000-1700W6363-50
    16#1400-1180W5050-40
    20#1180-1000W4040-28
    22#1000-850W2828-20
    24#850-710W2020-14
    30#710-600W1414-10
    36#600-500W1010-7
    40#500-425W77-5
    46#425-355W55-3.5
    54#355-300W3.53.5-2.5
    60#300-250W2.52.5-1.5
    70#250-212W1.51.5-0.5
    80#212-180W0.50.5-0.3
    90#180-150
    100#150-125
    120#125-106
    150#106-75
    180#90-63
    220#75-53
    240#63-50
    280#50-40
    320#40-28
  • Performance and advantages of white corundum sandblasting abrasive grain size sand:
  • 1. Does not affect the color of the workpiece;
  • 2. It can be used for sandblasting in the process where iron powder residue is strictly prohibited;
  • 3. Micro-powder grade is very suitable for wet sandblasting and polishing operations;
  • 4. Fast processing speed and high quality;
  • 5. The amount of iron oxide contained is extremely low, suitable for sandblasting operations where iron residues are strictly prohibited;
  • 6. After pickling step to remove.
  • It is suitable for surface beautification treatment of various high-end products, crafts or hardware products. After sandblasting, the surface is white without any impurities, eliminating the trouble of cleaning. Fine white corundum can be used as an option for polishing and grinding, and can also be used as an additive for various products.
  • 1. Surface processing: metal oxide layer, carbide black skin, metal or non-metal surface rust removal, such as gravity die-casting mold, rubber mold oxide or release agent removal, ceramic surface black spots, uranium color removal, painting Rebirth.
  • 2. Beautification processing: all kinds of gold, K gold jewelry, matte or matte treatment of precious metal products, matte processing of crystal, glass, corrugated, acrylic and other non-metallic surfaces, and can make the surface of processed objects into a metallic luster.
  • 3. Etching processing: jade, crystal, agate, semi-precious stones, seals, elegant stones, antiques, marble tombstones, ceramics, wood, bamboo etc.
  • 4. Pre-treatment processing: Teflon (TEFLON), PU, ​​rubber, plastic coating, rubber roller (ROLLER), electroplating, metal spray welding, titanium plating and other pre-treatments to increase surface adhesion.
  • 5. Burr processing: removal of burrs from bakelite, plastic, zinc, aluminum die-casting products, electronic parts, magnetic cores, etc. Force eliminates processing.

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