> Kupper Cerambead

cerambead in microscope

Shape: Ball shape;
Angle Factor: ≤ 1.1, very close to ball shape;
Thermal Expansion : 0.11% (10 minutes at 1000℃)
Product description: low density, good thermal conductivity, high temperature resistance, workable with acid and alkali binder
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Kupper cerambead(white or yellow color)ceramic/spherical foundry sand It can be widely used for Aluminum, gray and ductile iron, steel, copper, magnesium and other metals can be made using most any resin systems including phenolic urethanes, phenolic ester, furan, sodium silicate, bentonite clays, shell resins and alkyd oils.

Technical Data:

	KA-cerambead	KB-cerambead	KC-cerambead
Powder bulk density (g/cm³)	1.55	1.45	1.40
Refractoriness	1825°C	1800°C	1750°C
Coefficient of thermal expansion After 300 sec (%)	0.11	0.11	0.11
PH	7-8	7-8	7-8
Angle Factor	≤ 1.1, very close to ball shape
Main chemical components	Al₂O₃ 60% SiO₂ 38% Fe₂O₃ 1%	Al₂O₃ 50% SiO₂ 47% Fe₂O₃ 1.2%	Al₂O₃ 45% SiO₂ 53% Fe₂O₃ 1.5%

Advantages of KUPPER Cerambead:

(1) Powder bulk density	As Kupper CERAMBEADS is about half as light as zircon and chromite, it can turn out about twice the number of molds per unit weight, and it can be handled so easily, saving labor and transfer power cost.
Refractoriness	Having high refractoriness , Kupper CERAMBEADS can be used for casting various materials, and there is no need to use sand type distinctly according to material.
(3) Coefficient of thermal expansion	Thanks to little thermal expansion, Kupper CERAMBEADS is excellent in dimensional precision.
(4) Friendly to Binder	Kupper Cerambead is a neutral material, so acid, alkali binder can be used,also can reduce usage amount of adhesive
(5) Environment-friendly	Good recycling performance(more than 50 times). Lower cleavage breakage rate,very low cleavage breakage rate.,easily reclaimed.

PS:The main performance comparison of Chromite sand and Zircon Sand

NAME	Particle Shape	Refractoriness ℃	Reclaimation rate	Bulk Densityg/cm3	Binder Amount	Price	Mohs’ hardness	Thermal Expansion	Environment
Silica sand	irregular	Around 1750	Low	1.4-1.5		cheap	7	High	dust pollution
Kupper Cerambead	Very close to round brings good air permeability&flowability	KA 1825 KB 1800 KC 1750	High	KA 1.55 KB 1.45 KC 1.40	Less than 30%-50% comparing with other sand	modestly priced	8	Low	environment-friendly
Chromite Sand	Irregular	1830	Low	2.6-2.7		modestly priced	5.5-6.5	Low	heavy metal pollution
Zircon Sand	irregular	2340-2550	high	2.9-3.1		Very expensive	7.5-8	Very low	radioactive pollution

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