• Coal-charging Hole & Bell Pre-cast Refractory for Coke Oven

Coal-charging Hole & Bell Pre-cast Refractory for Coke Oven

  • ω(Al2O3) /%≥:45
  • ω(MgO) /%≥:2.5
  • Apparent Porosity /%≤:28
  • Bulk Density /g/cm3≥:40
  • Rupture Strength /MPa≥:4
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  • Overview
  • Technical Data
  • Inquiry
Introduction:
New type coal-charging hole precast has high strength, low thermal conductivity, and good abrasion and erosion resistance. Reduce physical damage and tar and other chemical erosion for the refractory during operation. The working life is up to three years.  

Features:

New type coal-charging hole working side has high performance crystalline ceramic refractory materials glazed. Don’t have the coal deposition and hang coke. New type coal-charging hole have self-cleaning function and keep the working area clean. It is more match with the lid, reduce gas leakage, yellow smoke and pollution, improving the oven roof working condition.

Item

Glazed

ω(Al2O3) /%                  

45

ω(MgO) /%                  

2.5

Apparent Porosity /%           

28

Bulk Density /g/cm3            

2.1

Cold Crushing Strength /MPa     

40

Rupture Strength  /MPa        

4

Thermal Conductivity/W/

(m·K)1000 (Heating side)     

1.2

Thermal Shock Resistance

(1100, water cooling) /cycle    

50

Item

Nomal

ω(Al2O3) /%               

45

ω(MgO) /%               

2.5

Apparent Porosity /%          

28

Bulk Density /g/cm3          

2.1

Cold Crushing Strength /MPa 

110*24h

After drying

35

1350*3h

After firing

40

Rupture Strength /MPa 

110*24h

After drying

3

1350*3h

After firing

4

Thermal Conductivity /W/

(m·K)1000 (Heating side)    

1.2

Thermal Shock Resistance

(1100, water cooling) /cycle ≥   

50

Comparison between new type and traditional type

New type

Traditional type

High performance crystalline ceramic refractory materials cover the working surface.

Iron casting

Good thermal insulation

Poor thermal insulation

No coal and coke deposition, self-clean function

Easy to be magnetized, leading to accumulate dust.

The maintenance frequency can be significantly reduced. Keep the working area clean.

Frequent repair and high maintenance cost.

Match with the lid; reduce gas leakage, yellow smoke and pollution, improving the oven roof working condition.

Gas leakage

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