Zhengzhou Zhongkeda Refractory Materials Co., Ltd

Zhongke Da Refractory is a leading refractory brick manufacturer in China, offering fire clay bricks, high alumina bricks, insulating bricks and custom refractory solutions for global industries like steel, cement, and glass. OEM & ODM available.

Types of Refractory Bricks | Manufacturer & Supplier

Classification of Refractory Bricks by Material，explore Different Types of Refractory Bricks Based on Their Raw Material Composition.

1. Fire Clay Bricks

Feature:

•High refractoriness (up to 1700°C)

•Superior resistance to slag and corrosion

•Higher strength than fire clay bricks

Typical applications:

•High-Temperature Industrial Equipment:🔥Blast furnace linings |🏭Steel ladle slag zones |🏗️ Cement rotary kilns (burning zones)

•Specialized Uses: 🧪Glass tank furnaces | ⚡Petrochemical reactors

3.Silica Bricks
Main Composition:More than 93% SiO₂

Feature:

•Excellent resistance to acid slags

•Strong performance at high temperatures

•Limited thermal shock resistance

Typical applications:

•Acidic High-Temperature Equipment:🏭Glass furnace tank walls | 🔥Coke oven carbonization chambers | 🏗️ Hot blast stove high-temperature zones

•Special Environments:⚡ Acidic gas incinerators | 🧪 Quartz glass melting furnaces

4.Magnesia Bricks
Main Composition:More than 90% MgO

Feature:

•Excellent alkali resistance

•High melting point (up to 2000°C)

•Suitable for basic slag environments

Typical applications:

•Steel Industry:🔥Basic oxygen furnace linings | ⚡Electric arc furnace slag lines | 🏗️️ Ladle slag zones

•Non-Ferrous Metallurgy:🧪Copper/Nickel refining furnaces | ⚗️ Lead/Zinc smelting reactors

•Cement Industry:🏭Rotary kiln transition zones (alkali-rich conditions)

5.Corundum Bricks
Main Composition: ≥90% Al₂O₃ (typically made from fused alumina or sintered alumina)

Features:
•Ultra-high refractoriness (up to 1800°C)

•Excellent chemical resistance (acid and alkali slags)

•Exceptional mechanical strength and wear resistance

•Low porosity & high thermal stability
Typical Applications:

🏭Glass furnaces | 🧬Petrochemical reactors | ⚫Carbon black kilns | 🛠️Steel industry (tapholes, nozzles) | ♻️Waste incinerators | 🧱Cement and lime kilns

6.Mullite Brick
Main Composition: 65–75% Al₂O₃ with mullite phase (3Al₂O₃·2SiO₂)

Features:

•High refractoriness (up to 1750°C)

•Excellent thermal shock resistance

•Low thermal expansion and high structural stability

•Good resistance to slag and chemical attack

Typical Applications:

🧪Petrochemical furnaces | 🏭Hot blast stoves & regenerative chambers |  🔩Ceramic & metallurgical kilns | ♻️ Incinerators and kiln linings

7.Acid Proof Bricks
Main Composition:High-silica clay, shale or quartz

Feature:

•Excellent acid and chemical resistance (except hydrofluoric acid)

•Low water absorption rate

•High mechanical strength and dense structure

•Long service life in aggressive chemical environments

Typical applications:

🏭Acid storage tanks and pickling tanks | 🧬Chemical plants and reaction vessels | 🔧Flue gas ducts and scrubbers | ♻️Wastewater treatment plants | 🧯Chimneys and drain linings

8.Magnesia Carbon Bricks

Features:

•Outstanding thermal shock resistance

•High resistance to slag penetration and erosion

•Good thermal conductivity and low wettability to slag

•Non-wettability to molten steel and high-temperature stability

Typical Applications:

🧲Electric Arc Furnace (EAF) linings | 🔩Converter (BOF) linings and taphole bricks | 🧪Ladle slag lines and impact zones |🧯Steelmaking tundishes and bottom blocks

Refractory Bricks by Shape

We offer a wide range of standard and customized refractory brick shapes to meet the structural requirements of various industrial furnace linings.

1. Standard Shapes

•Straight Bricks (Rectangular)

Dimensions: Typically 9" x 4.5" x 2.5" (230 mm x 114 mm x 64 mm) or similar ratios.

Features: Uniform edges and flat surfaces.

Applications: General furnace linings, walls, and floors.

•Arch Bricks (Tapered/Wedge)

Shapes: Radial (curved) or tapered (wedge-shaped).

Features: Designed to form arches or domes without cutting.

Applications: Roofs of kilns, rotary furnaces, and ladles.

•Radial Bricks: Curved to match furnace radius.

•Wedge Bricks: Tapered sides for tight fitting in arches.
•Skew Bricks

Shape: Angled edges (e.g., 30°, 45°, 60°) for fitting corners or complex geometries.

Applications: Corners, transitions between walls and arches.

2. Special Shapes

•Keyed Bricks

Features: Grooves, tongues, or interlocking edges.

Purpose: Improve structural stability and reduce joint gaps.

Applications: Blast furnaces, coke ovens.

•Checker Bricks

Shape: Perforated with holes or channels.

Purpose: Maximize surface area for heat exchange.

Applications: Regenerators in glass tanks and blast furnaces.

•Nozzle Bricks

Shape: Cylindrical or conical with a central bore.

Purpose: Control flow of molten metal, slag, or gas.

Applications: Ladle nozzles, tundish outlets in steelmaking.

•Tundish Bricks

Shape: Curved or trapezoidal to line tundishes.

Applications: Continuous casting in steel plants.

•Soap Bricks

Shape: Small, rectangular (e.g., 6" x 3" x 1.5").

Purpose: Fill gaps or repair linings.

Applications: Patchwork in furnaces or kilns.

3.Custom Shapes

Tailor-made for unique industrial equipment. Examples include:

•Burner Blocks: Complex shapes with drilled holes for burner nozzles.

•Crucibles: Cylindrical or conical vessels for melting metals.

•Specialty Liners: Designed for reactors, incinerators, or chemical tanks.

•Mullite bricks (3Al₂O₃·2SiO₂)

•Zircon bricks (ZrSiO₄)

•Andalusite bricks, cordierite bricks (low thermal expansion)
Application Scenarios:

•Ceramic roller kilns

•Doors of heat treatment furnaces

•Checker bricks in the regenerator chambers of glass furnaces
Key Properties:

•Low thermal expansion coefficient (< 5×10⁻⁶/°C)

•High thermal shock resistance (> 30 cycles at 1100°C ↔ water quench)

6.Functional Composite Refractory Bricks
Functional Features:These bricks integrate multiple functionalities such as electrical conductivity, anti-permeability, and catalytic activity to meet the demands of specialized high-temperature environments.
Typical Types:

•Conductive Refractory Bricks: e.g., magnesia-carbon bricks used as anodes in DC electric arc furnaces

•Anti-Penetration Bricks: incorporating zircon or spinel to prevent molten metal infiltration

•Catalytic Refractory Bricks: loaded with catalysts for exhaust gas treatment
Application Scenarios:

•Specialized metallurgical furnaces

•Environmental protection equipment

•Electrolytic cells and high-temperature reaction systems

7.Precast Refractory Bricks (Shaped Functional Bricks)
Functional Features:These bricks are preformed according to the specific shapes of industrial equipment, minimizing on-site joints and enhancing structural integrity.
Typical Types:

•Burner bricks, peep sight bricks, anchor bricks

•Monolithic precast blocks (e.g., ladle seating blocks)
Key Advantages:

•High installation efficiency

•Excellent spalling resistance

•Extended service life by 20%–30%