Bauxitic Casting Pearls

Bauxitic Casting Pearls are an innovative spherical casting sand developed in the Far East for the discerning Japanese markets.

Casting Pearls are a direct replacement for Chrome and Zircon casting grade Sands.

Available in a variety of AFS sizes, casting pearls offer a 'Chrome Free' option where environmental considerations are a concern.

Already an established product in Japan, Spherical casting pearls offer:

Fine Surface Finish.
Reduction of 'Burn on'.
Reduction of Zircon mould wash.
Up to 25% total cost reduction.
100% recyclable.
Compatible with existing resin systems.
No health or environmental issues.

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Bauxitic Casting Pearls Data Sheet (156 KB)

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Bauxitic Casting Pearls are produced by fusing, spraying, sieving and purifying high Alumina Calcined Bauxite to produce a very high quality casting sand. They can be used in casting all sizes of steel parts. The spherical shape produces high density material with excellent flow characteristics.

The surface of the spherical particles is glazed providing a very smooth surface that is easy to coat with resin.

Since Bauxitic Casting Pearls have a higher Mullite Phase Content than any other calcined casting sand, they are more refractory.

Uses

Organic or inorganic self-hardening casting moulding - Furan and Alkali-Phenol resin moulding.
Heat-hardening casting moulding - RCS moulding.
Gas-hardening casting moulding - CO2 and Cold Box moulding.

Typical Chemical Analysis

% SiO2	13.56%
% Al2O3	77.53%
% Fe2O3	2.38%
% CaO	0.78%
% MgO	0.35%
% TiO2	4.02%
% Na2O	0.03%
% K2O	1.2%

Typical Properties

pH	7 - 8
Bulk Density	1.9 - 2.1 (g/cc)
Refractoriness	> 1770°C
Reversible Thermal Expansion	0.65% (1000°C)

Typical Sieve Analysis

Size (µm)	BSS Mesh	AFS 45 Grade	AFS 55 Grade
850	18	-	-
600	25	0.85	-
425	36	26.85	8.42
300	52	45.39	28.22
212	70	17.66	31.53
150	100	6.81	21.82
106	150	2.28	9.24
75	200	0.1	0.63
53	300	0.04	0.12
-53	Pan	0.02	0.02

Other sizes are available including AFS30, AFS40, AFS50, AFS60, 60 - 170, 0.425 - 0.6mm, 0.6 - 1.0mm and 1 - 2mm. Information available on request.

Packaging

Bauxitic Casting Pearls are supplied in 25kg bags but may be supplied in 1000kg bulk bags on request.

The above product information is given in good faith as accurate and reliable but is not to be taken as a guarantee. The figures provided are intended to be a guide to expected average values and should not be interpreted as a specification. Any potential applications referred to are not to be construed as recommendations. It is the responsibility of the user to determine suitability for any specific purpose.