High Purity Grade 23 Insulating Firebrick
Negotiable /Piece
Min.Order:600 Pieces
The details of our insulating fire brick JM23
1.Made by high pure mullite as raw material,and adding alumina powder according to different type and then sintering in high temperature.
2.Al2O3 content is 50-85%.
3.Bulk density is 0.6-1.75g/cm3, crushing strength is 1.5-6.0MPa, thermal conductivity is 0.221-0.72W/(m.K) (1350°C)
4.Working temperature:less than 1600°C,Max working temperature:1700°C.
Features
Low thermal conductivity
High purity and low iron content
Good thermal resistance with direct access to fire
Superior thermal shock resistance
Accurate dimension and easy cutting
Application of insulating firebricks:
Technical Data:
Description | Grade 23 | Grade 26 | Grade 28 | Grade 30 | |
Classification Temperature | 1300C/2372F | 1400C/2552F | 1500C/2732F | 1550C/2822F | |
Density(kg/m3) | 600 | 800 | 900 | 1000 | |
Cold Crushing Strength (MPa) | 1.2 | 1.8 | 2.5 | 3.3 | |
Modulus of Rupture(MPa) | 1.0 | 1.7 | 2.3 | 3.1 | |
Permanent Linear Change (%)x24hrs | ≤0.6 | ≤0.6 | ≤0.8 | ≤0.9 | |
Thermal Expansion (%)1000C | 0.5 | 0.52 | 0.52 | 0.53 | |
Thermal Conductivity (W/m.k) | 350C | 0.18 | 0.25 | 0.33 | 0.38 |
400C | 0.20 | 0.29 | 0.35 | 0.40 | |
600C | 0.24 | 0.32 | 0.37 | 0.42 | |
Chemical Composition (%) | Al2O3 | 42 | 56 | 67 | 73 |
SiO2 | 55 | 41 | 30 | 24 | |
Fe2O3 | ≤1 | ≤0.8 | ≤0.7 | ≤0.7 | |
K2O+Na2O | 1.1 | 1.7 | 1.7 | 1.7 |
Q1.What is the difference between Refractoriness and Working temperature ?
A1:Refractoriness:the refractory material withstands high temperature without melting and softening performance in the absence of load resistance.Usually working temperature is less than refractoriness about 350-400°C.
Q2.How are the products’ quality?
A2:The products will be strictly inspected before shipment, so the quality could be guaranteed.
Q3:What is the Warranty for the fire brick?
A3:For all the brick,we have 1 years warranty.If any quality problems on our side occured in this period ,we will take on the shipping cost and replacement.
If u need our products, pls contact with us.