Name: China Fused AZS Brick Manufacturers Suppliers Factory - Customized Fused AZS Brick Price
Brand: Zinfon Refractory
SKU: 250799820

Description

Introduction

The production of electrocast zirconia-corundum (AZS) bricks requires a precise electrofusion process. In an electric furnace, high-purity raw materials such as alumina and zirconia are melted at elevated temperatures. By controlling temperature and pressure, the melt is homogenized and densified. After cooling and solidification, electrocast zirconia-corundum bricks are formed.

Advantage

Refractory Temperature

Up to 1790°C or higher; some high-zirconia grades (e.g., AZS-41) approach 1850°C, far exceeding ordinary refractories (fireclay bricks ~1300°C, high-alumina bricks ~1500°C).

Load Softening Temperature

Typically 1550–1650°C, resisting softening or deformation under high-temperature loads. Ideal for glass kilns, metallurgical furnaces, and other high-temperature applications.

Exceptional Molten Glass Erosion Resistance

Zirconia (ZrO₂) does not react with silicates in molten glass and forms a dense zirconia film on the brick surface, preventing penetration and erosion.

Chemical Corrosion Resistance

Resistant to metallurgical slags (e.g., iron oxide, calcium oxide) and alkaline gases in ceramic kilns (e.g., Na₂O volatiles), inhibiting acid-base neutralization and grain boundary corrosion.

Outstanding Thermal Shock Resistance

ZrO₂'s phase-change toughening (monoclinic to tetragonal transition) absorbs stress and inhibits crack propagation. In 1100°C water-cooling cycle tests, AZS bricks withstand over 50 cycles without failure (ordinary high-alumina bricks: 10–20 cycles).
Suited for kilns with frequent start-stops or large temperature fluctuations (e.g., batch glass kilns, heat treatment furnaces).

Low Thermal Conductivity

Dense structure and high-melting crystals result in thermal conductivity of 1.5–2.0 W/(m·K), lower than silica bricks (~2.5 W/(m·K)), reducing kiln heat loss and energy consumption.

High Mechanical Strength

Room-temperature compressive strength: 300–400 MPa (fireclay bricks: 30–60 MPa), supporting kiln structural loads and mechanical impacts.
Flexural strength: 40–60 MPa, resisting breakage from mechanical stress.

Excellent Abrasion Resistance

Dense corundum-zirconia crystal structure (Mohs hardness 7–8) results in wear rates one-fifth to one-third that of ordinary refractories under molten glass scouring, metallurgical slag flow, or ceramic billet friction.

Low Porosity & High Density

Electrofused bricks exhibit apparent porosity less than 5% (common refractories >10%), blocking penetration by liquids (e.g., molten glass, slag) and reducing internal corrosion.

Superior Erosion Resistance

In high-velocity flow zones (e.g., glass kiln throats, metallurgical furnace outlets), AZS bricks withstand liquid flows exceeding 10 m/s while maintaining smooth, intact surfaces.

Zinfon Refractory Technology Co.,Ltd.

We provide one-stop services from technical consultation to design, production, and after-sales support.

Manufacturer Direct

Factory Prices

Premium Service

Customization Available

Raw Materials

Component	Content Range (Mass Fraction)	Functions and Characteristics
Alumina (Al2O3)	45% - 55%	- Provides high refractoriness and mechanical strength, serving as the basic component for high - temperature resistance. - Enhances the ability to resist glass liquid erosion.
Zirconia (ZrO2)	30% - 45%	- Significantly improves corrosion - resistance and erosion - resistance properties, especially in resisting glass liquid penetration. - Improves thermal stability and inhibits crack propagation.
Silica (SiO2)	15% - 20%	- Regulates the fluidity of the melt, influencing the molding and density of the brick body. - Forms a low - melting eutectic with other components, so the content needs to be controlled to avoid reducing the refractoriness.

Physical and Chemical Specifications

Grade / Specifications		AZS-33	AZS-36	AZS-41
SiO₂ %		15	13	12
Al₂O₃ %		Rest	Rest	Rest
ZrO₂ %		33.5	36.5	41
Fe₂O₃ + TiO₂ + CaO + MgO + Na₂O + K₂O %		≥ 2.0	≥ 2.0	≥ 2.0
Bulk Density (g/cm3)		3.80	1400	4.05
Apparent Porosity %		0.7	0.8	0.6
Initial Precipitation Temperature of Vitreous Phase °C		1400	1400	1400
*Vitreous Phase Exudation (1500 °C4 hr) %**		2.0	2.3	1.5
Anti-molten Glass Erosion Rate under Static Condition *mm / 24 hr (1500 °C36 hr, Odinary Soda Lime Glass)**		1.4	1.3	1.2
Bubble Release Rate % *(1300 °C10 hr, Odinary Soda Lime Glass)**		1.2	1.0	0.6
Typical Bulk Density g/cm³	Ordinary / Inclined Casting	3.50	3.55	3.65
	Quasi-non Bubble Casting	3.70	3.80	3.90
	Non-buble Casting	3.80	3.85	4.00

process

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Applications

Electrofused AZS bricks (electrofused zirconia-corundum bricks) are widely used in high-temperature, highly corrosive industrial kilns and specialized applications due to their excellent resistance to heat, corrosion, wear, and erosion. Below is an analysis of their core application areas and typical scenarios:

Glass Industry: Core Application Scenarios

AZS bricks are the preferred material for critical parts of the glass production process that must withstand erosion and washout from high-temperature molten glass at 1500–1700°C.

Metallurgical Industry:High-temperature corrosion-resistant environments

Ceramics and Refractories Industry

Chemical and Energy Industry

Other Special Fields

1. Nuclear industry and high-temperature experimental equipment

2. Glass processing equipment

Application Selection Principles and Considerations

ZrO₂ Content Selection Based on Corrosion Severity

Mild Corrosion (e.g., kiln superstructure): Opt for AZS-33 bricks (33% ZrO₂) for cost efficiency.

Moderate Corrosion (e.g., molten glass contact zones): AZS-36 bricks (36% ZrO₂) balance performance and cost.

Severe Corrosion/Erosion (e.g., flow ports, electrode areas): AZS-41 bricks (41% ZrO₂) are essential for safety and durability.

Thermal Shock-Intensive Environments: Prioritize Thermal Shock Resistance
For kilns with frequent start-stops (e.g., ceramic shuttle kilns), select AZS-33 bricks or micronized powder-modified AZS bricks. The ZrO₂ phase-change toughening enhances thermal shock resistance.

Avoid Prolonged Alkaline Exposure

While AZS bricks exhibit better alkali resistance than silica bricks, in high-concentration alkali environments (e.g., soda ash furnaces with constant NaOH/KOH exposure), they should be used together with alkaline refractories (e.g., magnesia bricks).

Application Advantages and Industry Value

The core value of electrofused AZS bricks lies in the integration of "high-zirconia composition + electrofusion process," addressing the service life limitations of traditional refractories under combined high-temperature, corrosion, and erosion conditions. Typical application scenarios include:

Glass Industry
Replacing silica and conventional high-alumina bricks as the "standard solution" for critical kiln components.

Metallurgy & Chemical Sectors
Gradually substituting toxic materials (e.g., chromium-containing refractories) in environmental protection and specialty materials production.

High-End Manufacturing
Providing reliable high-temperature material solutions for cutting-edge fields such as new energy and nuclear industries.

As industrial kilns evolve toward "higher temperatures, longer service life, and lower energy consumption," AZS bricks will expand their application scope-particularly in emerging industries such as photovoltaic glass and lithium battery materials, which offer broad prospects.

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