Ceramic Sands

Ceramic Sands

Ceramic sand is a kind of refractory particle with diameter of 0.020mm~3.350mm, mainly made of Al2O3·SiO2. It is ball-shaped particle made from bauxite by high-temperature melting in electric arc furnace, spraying and cooling. This material is widely used instead of chromite sand for no-bake and cold box core making applications.

Features

  • Widely used in foundries with resin-bonded sand, sodium silicate sand, and clay-bonded sand for sand core and casting mould making.  
  • Replace chromite sand and widely used in sand core making like jacket core, oil duct core, tappet core of engine etc.
  • Replace chromite sand for steel casting facing sand and sub-layer of molding sand (backing sand).
  • Widely used as dry sand for lost foam and vacuum molding processes.
  • Widely used as the main raw materials of advanced refractory products. (ladle drainage sand, gravity casting material, casting coating, etc.).
  • Widely used as cleaning sand for copper and aluminum alloy castings

Properties

Physical Propertiese Chemical Properties (%)
Bulk Density (g/cm3) 1.9-2.0 Al2O3 65-82
Angle Factor <1.1 SiO2 1532-21.6
Compressive Strength (Mpa) 46 Fe2O3 1.5-3.0
Refractoriness (⁰C) >1800 MgO 0.23-0.7
Thermal Conductivity (W/m.K) 0.5-0.6 CaO 0.16-1.5
Thermal Expansion % (800-1450⁰C) 0.5-0.65 TiO2 1.99-2.71

Grain Size

mesh 20 30 40 50 70 100 140 200 270 >270 AFS
μm 830 550 380 270 212 150 109 75 53  
 
 
Product No.
350# ≤10 25-45 35-55 5-15 ≤5 ≤2         25-35
450#   ≤10 25-45 25-45 15-25 ≤7 ≤5       35-45
550#   ≤3 15-25 25-40 25-45 10-20 ≤10 ≤5     45-55
650#     ≤8 10-25 20-40 20-40 15-25 ≤8 ≤5 ≤5 60-70
750#       ≤10 5-15 25-45 20-40 ≤15 ≤5 ≤5 75-85
1000#         ≤10 15-35 30-45 10-20 ≤5   100-110