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fused silica grains (stuccos) and powders (flours) for the investment casting

fused silica grains (stuccos) and powders (flours) for the investment casting

Product No.：202111391844
Price(USD)：USD550/MT
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Chemsize Fused silica is electrically fused high purity silica produced at fusion and processing facility located in China Lianyungang .

Our fused silica products are specially engineered grains and powders designed for use in foundry, refractory, investment casting and other special applications.

Chemsize assures that customers will always receive the highest quality material.

FUSED SILICA FOR INVESTMENT CASTING / REFRACTORY APPLICATIONS

Chemsize produces several grades of coarse fused silica grains (stuccos) and powders (flours) for the investment casting and refractory industries. Due to fused silica’s low thermal conductivity and excellent thermal shock resistance, it is widely used in both industries.

Chemsize makes several standard grain size distributions for both applications.

These are produced by the blending of several tightly controlled fractions.

Dust removal is also given high priority for fluid bed/rainfall sander applications.

Chemsize is capable of producing powders with several different particle size distributions, by utilizing several ball mills on site. This allows the flexibility to

produce material with a broad range of particle size distributions. Particle sizing is controlled using the most up-to-date particle size analyzers.

Chemsize quality control/assurance laboratory has all of the state-of-the-art equipment necessary for testing fused silica grains and powders.

Routinely, the laboratory is capable of performing the following tests: Test sieve analysis, pH, magnetics, atomic absorption spectroscopy, Microtrac p.s.d, B.E.T.

surface area and many others.

Fused Silica grains fused silica powder -Investment Casting Grade
CHEMICAL ANALYSIS

1．	Physical Properties
1.1	Composition		SiO2
1.2	Structure		Amorphous
1.3	Colour		Transparent or white
1.4	Melting Temperature		approx.1750℃
1.5	Specific Gravity		2.21g/cm3
1.6	Hardness		7 Mohs
1.7	Thermal Expansion		0.5*10-6
2．	Chemical Properties
		Investment Casting Grade
2.1	SiO2	>99.90%
2.2	Al2O3	<200ppm
	The finer the power,the higher the Al2O3,as powder is produced by ball mill with Alumina ball.
2.3	Fe2O3	<50ppm
2.4	TiO2	<20ppm
2.5	MgO	<40ppm
2.6	CaO	<40ppm
2.7	AlkaliesNa2O+K2O	<100ppm
3.	Particle Size	Distribution

Particle size distribution:PSD

		10/20	20/50	30/50	50/100	-100	-200	-325mesh
Mesh	Microns
8	2360	<2
12	1700	6-25
16	1180	33-50
20	850	25-45	<1	<1
30	600	13	25-40	15-30
40	425		32-45	38-50
50	300		15-30	20-35	<13
70	212				30-60
80	180		0-11	<10			<1
100	150				28-51	<15	<1
140	106				4-16	17-40	<10
200	75				<2	19-34	<10	<3
325	45					14-30	15-30	4-11
Pan		<3	<2	<2	<1	4-20	70-80	86-97