Ceramic Foundry Sand

Ceramic Foundry Sand
Ceramic Foundry Sand

Ceramic foundry sand is made from high-quality calcined bauxite, processed through electric fusion, granulation, and screening processes to produce spherical refractory particles.

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Applications

  • Mainly used in casting processes such as shell molding, precision casting, lost foam casting, heavy steel casting, resin coated sand casting, vacuum casting, and investment casting.
  • Steel ladle drainage agent (replacing chromite foundry sand) - high pouring rate, low specific gravity, low thermal expansion rate.
  • Alloy surface treatment (replacing glass beads) - Moderate hardness, good wear resistance, stable chemical composition.
  • Refractory coatings (replacing zirconium powder or alumina powder) - High refractoriness, low thermal expansion coefficient, good permeability, low cost.
  • Ceramic Foundry Sand
  • Ceramic Foundry Sand

Features

  • Spherical grain shape with excellent flow ability and easy compaction. Smooth surface, dense structure, low surface area, requiring less binder and curing agent. It has high compactness, preventing metal liquid infiltration and mechanical sand penetration.
  • High refractoriness and good chemical stability at high temperatures. It is a neutral material, resistant to corrosion by metal compounds, preventing chemical sand sticking.
  • Low thermal expansion rate effectively prevents the gradual formation of expansion defects.
  • Good resistance to breakage, minimal dust generation, environmentally friendly, and recyclable, reducing costs and conserving resources.

Typical Chemical Analysis

Chemical Composition Al2O3 SiO2 Fe2O3 TiO2 CaO MgO K2O Na2O
Content 70-75% 8-20% ≤ 3% ≤ 3.5% ≤ 0.45% ≤ 0.35% ≤ 0.33% ≤ 0.08%

Typical Physical Properties

Shape Spherical Refractoriness ≥ 1800℃
Color Dark Brown Thermal Expansion 0.13%
Bulk Density 1.95 -2.05g /cm Thermal Conductivity 0.698W/M.K
True Density 3.4g /cm Angularity ≤1.1
Test Report

Particle Size Distribution

Mesh μm 1700 850 600 425 300 212 150 106 75 53
spec 10 20 30 40 50 70 100 140 200 270
20-40 ≤2 15-40 30-55 15-35 ≤3
30-50 ≤10 25-45 35-55 5-15 ≤5 ≤2
40-70 ≤10 25-45 20-40 5-25 ≤7 ≤5
40-100 ≤3 10-25 25-40 25-45 10-25 ≤10 ≤5
50-100 ≤10 10-30 30-50 15-35 ≤15 ≤5 ≤2
50-140 ≤8 10-25 20-45 20-45 5-20 ≤7 ≤2
70-140 ≤10 10-25 25-45 15-35 ≤15 ≤5
100-200 ≤3 10-35 35-55 15-35 ≤10
100-270 ≤2 5-20 30-50 25-45 5-20
140-270 ≤5 5-25 40-60 25-40
200-270 ≤5 35-55 25-45 25

(other sizes are customizable)

Production Flow

  • Ceramic Foundry Sand
    Ceramic Foundry Sand Processing
  • Ceramic Foundry Sand Bauxite smelting
  • Ceramic Foundry SandElectric fusion sand making
  • Ceramic Foundry Sand Screening
  • Ceramic Foundry Sand Sampling
  • Ceramic Foundry Sand Testing
  • Ceramic Foundry Sand Packaging

FAQs

The refractoriness of ceramic foundry sand refers to its ability to maintain its physical and chemical properties under high temperatures. As a refractory material, ceramic foundry sand needs to withstand various thermal stresses, chemical erosion, and mechanical stresses under high temperature conditions to ensure its service life and stability.

a. Refractoriness test method:
The refractoriness test is conducted by placing the ceramic foundry sand sample under high temperature conditions and gradually heating it until significant sticking, cracking, or loss of physical and chemical properties occurs in the sample.

b. Refractoriness test standards:
Common international refractoriness test standards for ceramic foundry sand include ISO, ASTM, etc. Domestic standards include GB, JC, etc.

Fused Alumina

Use in many different industries such as abrasives, refractories, sandblasting etc.

Other Fused Materials