Product Details

Production Introduction:

Ceramstie beads for foundry

Ceramic sand ( ceramsite sand)is an advanced substitute for quartz sand in the casting field. Ceramic sand is made from calcined bauxite with the main content of aluminum oxide processed by melting, blowing, sieving and blending. After melting calcined bauxite with 65-90% aluminum oxide in a high-temperature electric arc melting device, the outflow of ceramic blown into fine particles. Then after cooling and sieving, the ceramic sand become finished particles with different size grade.

Characters:

1. Low thermal expansion coefficient

2. High strength with good compressive strength and bending resistance ability and low broke rate.

3. spherical shape, good flowability, easy to shakeout

4. smooth surface, compact structure

5. chemically neutral material

6. high-temperature resistance, good refractoriness

7. Recycle up to 10 times, highly cost-effective.

8. Save resin consumption with casting tech such as shell molding, Resin coated sand casting, Vacuum casting, etc.

TYPICAL CHEMICAL ANALYSIS
AL2O3	70-75%
SiO2	8-20%
Fe2O3	≤3%
TiO2	≤3.5%
CaO	≤0.45%
MgO	≤0.35%
K2O	≤0.33%
Na2O	≤0.08%

TYPICAL PHYSICAL PROPERTIES
Refractoriness	≥1800 ℃
Specific gravity:	3.4g/cm3
Bulk density(LPD):	1.95-2.05 g/cm3
Color:	black brown
Grit shape:	spherical ball
Thermal expansion coefficient	6x10-6 /℃(20-1000℃)
Thermal conductivity	0.698W/M.K(1200℃)
Thermal expansion ratio	0.13%
Angularity	≤1.1
Available sizes
AFS15-20,AFS 15-25,AFS25-35,AFS25-30,AFS30-35,AFS35-40,AFS40-45,AFS45-50,AFS40-50,AFS50-55,AFS55-60,AFS60-65,AFS60-70,AFS70-80,AFS95-110 Customized sizes are available upon request

Applications:

1. Shell molding

2. Precision Casting

3. Lost foam casting

4. Heavy steel casting

5. Resin coated sand casting

6. Vacuum casting

7. Investment casting

How to choose proper grain size for your work:

Applications	Grit Size	AFS SIZE
Foundry sand for Lost foam	8-15#(10#)10-20#,20-30#	AFS25-35
Filler sand	30#
No bake sand including furan resin /alkaline-phenolic resin molding and core making/ Pep set /Sodium-silicate bonded sand	30-50#,40-70#,50-70#,70-140#	AFS35-45,AFS25-35,AFS45-55, AFS55-65,AFS60-70,AFS70-80
Shell molding, resin coated sand casting	50-100#,70-140#,100-200#	AFS55-65,AFS60-70,AFS70-80, AFS95-110
Lost foam casting coating	140-270#,-200#
Molding sand alcohol-based coating	-200#
3D printing, precision casting, investment casting	-140#