Low Thermal Conductivity Anti-Spalling Refractory Brick-DDR30

Product Details
Customization: Available
Material: Synthetic Material
Refractoriness (℃): 1770< Refractoriness< 2000
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Number of Employees
186
Year of Establishment
2002-04-01
  • Low Thermal Conductivity Anti-Spalling Refractory Brick-DDR30
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Basic Info.

Model NO.
DDR30
Feature
Long Time Materials
Type
Refractory Material
Transport Package
Export Wooden Pallet
Specification
322, 422, 622, 320, 420, 620
Trademark
Nie
Origin
China
HS Code
6902200000
Production Capacity
30000t/a

Product Description

Description:
DDR30 Low thermal conductivity Anti-spalling Brick is one high quality refractory brick for Cement Rotary Kilns,made of Synthetic material, Clay.

Characteristics:
1.Outstanding resistance to alkali attack
2.Excellent thermal-shock resistance
3.Excellent abrasion resistance
4.Low thermal conductivity
5.Decreasing the kiln shell load, the mechanical stress on the lining

Application zone:
Safety zone, Pre-heating /Calcining zone in rotary kiln

Physical and chemical index
Chemical composition UNIT SPEC typical
Al2O3 % ≤35 32 - 34
SiO2 %   62 - 64
Fe2O3 % ≤1.8 1.6
 
Physical properties       UNIT SPEC typical
Bulk Density BD g/cm3 ≤2.2 2.1-2.2
Apparent Porosity AP %   16
Thermal Shock Resistance TSR - in water at 1100 °C cycle ≥15 16
Refractoriness Under Load RUL (ta) °C ≥1310 1330
Thermal Expansion TE - at 1000 °C %   0.6
Cold Crushing Strength CCS MPa ≥45 57
Thermal Conductivity TC - at 700 °C W/mK ≤1.5 1.5
Alkali Resistance 1100 °C*5h   First grade

Comparision between DDR 30 and Silicon carbide brikcs
Items DDR30 Sic bricks Advantages of DDR30 
Alkali-resistant Test  fine fine To form erosion resistance layer on the surface, which protects the refractory grains from penetration of alkalis vapors 
Anti-spalling fine fine Avoids the alkali spalling without corrosion of kiln shell
Thermal conductivity  low high Decrease the shell temperature about 50-60ºC, heat loss and energy consumption.
Bulk density 2.1 2.6 Save 1.5 ton materials per meter of lining, decrease the electric current which save the electricity consumption  
Usage life (5000t/d) 3 years   Usage position: 40m-50m
5 years   Usage position: after 50m

Low Thermal Conductivity Anti-Spalling Refractory Brick-DDR30

 

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