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Weakly Acidic Customizable Insulation Fire Clay Brick Refractory Clay Brick for Ovens and Kilns

Weakly Acidic Customizable Insulation Fire Clay Brick Refractory Clay Brick for Ovens and Kilns

MOQ: 1
Price: Negotiable
Standard Packaging: Pallet
Delivery Period: 10-15days
Payment Method: L/C,D/P,T/T
Supply Capacity: 5000tons per month
Detail Information
Place of Origin
China
Brand Name
Leadsun
Certification
ISO; CE
Model Number
SK32; SK34; SK36
Type:
Refractory Bricks SK32 Sk34 SK36
Material:
Refractory Clay Bricks
Shape:
Brick
Specification:
Customizable
Bulk Density G/cm3:
2.00-2.35
Al2O3 % (min):
30%-55%
Highlight:

Weakly Acidic Fire Clay Brick

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Customizable Refractory Clay Brick

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Insulation Fire Clay Brick

Product Description

Fire clay bricks are high-temperature refractory insulation bricks with weakly acidic properties, engineered for ovens, kilns, and other high-heat industrial environments. They combine reliable thermal insulation with long service life and versatile shaping options, making them one of the most widely used refractory materials across a broad range of kiln applications.

Key Features
  • Low thermal conductivity for excellent thermal insulation performance.
  • Long service life and easy operation; can be shaped freely to suit specific requirements.
  • Available in standard form, normal standard, shaped, and special shaped bricks.
  • Suitable for a wide variety of kilns due to its cost-effectiveness and general tray packaging — among all refractory materials, it is the most widely used.
Applications
  • Carbon bake furnaces in the aluminium industry
  • Preheat zones and cyclones of rotary cement kilns
  • Insulation for glass tanks
  • Coke ovens
  • Blast furnaces
  • Reheating furnaces
  • Suspended roofs
  • Lime kilns
  • Chimneys
Fire clay refractory insulation bricks stacked and ready for use in ovens and kilns
Technical Data
Item SK-30 SK-32 SK-34 SK-36
AL2O3 % (min) 30–35% 35–38% 38–42% 50–55%
Fe2O3 % (max) 3 3 2.8 2.5
Refractoriness ≥1670°C ≥1690°C ≥1710°C ≥1750°C
Refractoriness under load, 0.2MPa (°C) ≥1270 ≥1350 ≥1350 ≥1430
Apparent porosity (%) 20–24 20–24 19–23 18–22
Bulk density (g/cm³) 2.00–2.05 2.05–2.1 2.1–2.15 2.15–2.25
Cold crushing strength (MPa) ≥25 ≥30 ≥35 ≥45
Thermal expansion at 1000°C (%) ≤0.6 ≤0.55 ≤0.55 ≤0.4
Ratings & Review

Overall Rating

5.0
Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings
5 stars
100%
4 stars
0%
3 stars
0%
2 stars
0%
1 stars
0%

All Reviews

J
Juan
Ecuador Mar 30.2026
I have cooperated with other suppliers, but their refractory bricks are of poor quality and low life. Until i met Leadsun Refractory and visited company and factory, i am sure this is a very good partner. We have cooperated many times and have maintained a good cooperative relationship