RS Silica Bricks for Coke Ovens

Silica Bricks for Coke Ovens

High refractoriness under load.
High thermal conductivity.
Good thermal shock resistance.
High-temperature volume stability.

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Silica bricks for coke ovens are siliceous refractory products with tridymite as the main crystal phase, used for building coke ovens. Modern coke ovens are large-scale thermal equipment built with refractory materials of tens of thousands of tons and nearly a thousand brick types. Among them, silica bricks account for 60%~70%. Coke oven silica bricks are used to build the regenerator, ramp, combustion chamber, carbonization chamber, and furnace roof of coke ovens. Contact Rongsheng for a free quote and samples now!

Performance Characteristics of Coke Oven Silica Bricks

Coke oven silica bricks should have the following characteristics:

(1) High refractoriness under load. Coke oven silica bricks must withstand the dynamic load of the coal-loading car on the furnace roof at high temperatures and are required to remain unchanged during long-term use. Therefore, the refractoriness under load of coke oven silica bricks is required to be high.
(2) High thermal conductivity. Coke is made by heat transfer from coking coal in the carbonization chamber through the kiln wall of the combustion chamber. Therefore, the silica bricks used to build the combustion chamber wall should have a higher thermal conductivity.
(3) Good thermal shock resistance. Since the coke oven needs to be loaded with coal and discharged periodically, it is easy to cause drastic changes in the temperature of the silica bricks on both sides of the combustion chamber wall. Therefore, the thermal shock resistance of coke oven silica bricks is required to be good.
(4) High-temperature volume stability.

Physical and Chemical Indicators of Silica Bricks for Coke Ovens

The silica bricks JG-94 for coke ovens are on the basis of the product standard YB/T5013-1997. Its physical and chemical indicators are shown in the following table.

Silica Bricks JG-94 for Coke Oven Physical and Chemical Indicators
Items	Furnace Bottom and Wall Silica Bricks	Silica Bricks for Other Parts
SiO2 %	≥
0.2MPa Load Softening Start Temperature ℃	≥1650
Linear Change Rate after Burning at 1450°C ×2h, %	0 ~ +0.2
Apparent Porosity %	≤22	≤24
Compressive Strength at Room Temperature MPa	≥30	≥25
True Density g/cm3	≤2.34	≤2.35
Linear Expansion Rate (1000℃) %	≤1.28	≤1.30

Physical and Chemical Indicators of Silica Bricks for Coke Ovens in Rongsheng

Physical and Chemical Indicators of Silica Bricks for Coke Ovens
Items	LJG-94A		LJG-94B
	Standard Value	Typical Value	Standard Value	Typical Value
SiO2 %	≥94	≥95.0	≥94	≥95.0
Fe2O3 %	≤1.5	≤0.7	≤1.5	≤0.8
0.2MPa Load Softening Start Temperature ℃	≥1650	≥1670	≥1650	≥1670
Linear Change Rate after Burning at 1450°C ×2h, %	≤0.2	≤0.05	≤0.2	≤0.05
Apparent Porosity %	≤22	≤19.0	≤24	≤21.0
Compressive Strength at Room Temperature MPa	35	45.0	30	35.0
True Density g/cm3	2.34	2.328	2.34	2.33
Linear Expansion Rate (1000℃) %	1.25	1.21	1.26	1.23