Fused Mullite

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Fused Mullite Specification

Surface Finish
Rough as produced, can be processed as required

Hardness (%)
Mohs hardness 8 - 9

Melting Point
Approximately 1850C - 1900C

Purity(%)
Typically >98%

Density
3.1 Gram per cubic centimeter(g/cm3)

Water Absorption
Negligible

Form
Solid / Lumps / Granular

Usage & Applications
Used in linings for glass and steel furnaces, kiln furniture, and high-temperature industrial applications

Chemical Composition
Al2O3-SiO2 based

Application
Refractories, kiln furniture, foundry, ceramics, glass industry, metallurgy, and high-temperature insulating materials

Product Type
Fused Mullite

Types of Refractories
Acidic refractory, synthetic mullite

Shape
Lump, granule, or specified shapes

Porosity
Low

Dimensional Stability
Excellent at elevated temperatures

Strength
High compressive and bending strength

Specific Gravity
2.7 - 3.0

Thermal Conductivity
Low

Color
Off white to light brown

About Fused Mullite

We are extensively reckoned as one of the well known importers, exporters and suppliers of widely appreciated Fused Mullite. Developed using excellent quality raw materials, these mullites are suitable for casting all type of alloys and metals. Our reputed vendors professionals process the entire assortment of chemicals in accordance with the international quality norms and standards. The offered Fused Mullite are given to the clients in variety of size fractions as per the requirements of our esteemed customers.

Features:

High thermal stability
Low reversible thermal expansion
Resistance to slag attack at high temperatures
Stable chemical composition

Process of Production :

Fused Mullite is produced by Bayer process alumina and high purity quartz sand while fusing in super-large electric arc furnace.

It has a high content of needle-like mullite crystals which confer high melting point, low reversible thermal expansion and excellent resistance to thermal shock, deformation under load, and chemical corrosion at high temperature.

Application :

It is widely used as raw materials for high grade refractories, such as the lining bricks in glass kiln furnace and bricks used in hot wind furnace in steel industry.
It's also used in Ceramic kiln and petrochemical industry and many other applications.

Technical Specification :

Items		Unit	Index	Typical
Chemical composition	AI₂O₃	%	70.00-77.00	73.90
	SiO₂	%	22.00-29.00	24.06
	Fe₂O₃	%	0.1 max (Fines 0.3% max)	0.08
	K₂O+Na₂O	%	0.40 max	0.16
	CaO+MgO	%	0.4% max	0.08
Refractoriness		oC	1850
Bulk Density		g/cm3	3.00 min	3.1
Glass phase Content		%	5 max
3AI2O3.2SiO2 Phase		%	95 min

Exceptional Thermal Shock Resistance

Fused Mullite stands out for its excellent resistance to thermal shock and slag corrosion, ensuring enhanced durability in demanding industrial processes. Its low thermal expansion coefficient makes it particularly suitable for kiln furniture, glass furnaces, and other high-temperature applications where rapid temperature changes are common.

Versatile and Customizable Particle Sizes

Available in tailor-made particle sizes, including 0-3mm, 3-5mm, and lumps, Fused Mullite adapts to specific requirements of diverse industries. This flexibility allows customers to select the most suitable grade for their intended use, whether for linings or intricate ceramic components.

Outstanding Physical and Chemical Properties

With high purity (>98%), Mohs hardness of 8-9, and refractoriness under load above 1700C, Fused Mullite delivers superior mechanical and chemical stability. Its low loss on ignition (<0.5%) and low thermal conductivity further enhance its performance in critical applications.

FAQs of Fused Mullite:

Q: How is Fused Mullite used in industrial applications?

A: Fused Mullite is primarily employed in high-temperature environments such as glass and steel furnace linings, kiln furniture, foundries, and the ceramics industry. Its thermal stability and resistance to chemical attack make it highly effective for these demanding applications.

Q: What are the available forms and particle sizes of Fused Mullite?

A: The product is offered as solid lumps, granules, or in specified shapes. Typical particle sizes include 0-3mm, 3-5mm, or lump form, with the possibility of custom sizing to meet specific requirements.

Q: When should Fused Mullite be preferred over other refractory materials?

A: Fused Mullite is preferred for applications that demand low thermal expansion, high resistance to thermal shock, superior slag corrosion resistance, and excellent dimensional stability at elevated temperatures.

Q: Where can Fused Mullite be sourced and in what packaging?

A: Suppliers, exporters, and importers in India offer Fused Mullite, typically packaged in 25kg bags, 1MT jumbo bags, or customized packaging according to customer needs.

Q: What is the process for customizing particle size and shape for Fused Mullite?

A: Customers can specify their requirements for particle size and shape when placing orders. The manufacturing process allows tailoring of these parameters to suit particular industrial needs, ensuring optimal performance in end-use applications.

Q: What are the main benefits of using Fused Mullite in refractory applications?

A: Key advantages include high compressive and bending strength, low porosity, minimal water absorption, low thermal conductivity, and outstanding dimensional stability at high temperatures, resulting in longer service life and reduced maintenance.

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