Burn-free fireclay brick-Refractory materials for coke ovens-SHANDONG LUQIAO NEW MATERIAL CORP., LTD.

Burn-free fireclay brick

PRODUCT SPECIFICATIONS

GB/T 34188

Items		PN-30
ω(Al₂O₃) / %	μ₀≥	30
ω(Al₂O₃) / %	σ	2.5
ω(Fe₂O₃) / %	μ₀≤	----
ω(Fe₂O₃) / %	σ	≤0.4
Apparent porosity / %	μ₀≤	23(25)
Apparent porosity / %	σ	2.0
Cold crushing strength / MPa	μ₀≥	30(25)
	Xmin	20(15)
	σ	10
0.2MPa Refractoriness under load T_0.6/℃	μ₀≥	≥1300
0.2MPa Refractoriness under load T_0.6/℃	σ	13
Permanent linear change /%	U-L	1300℃×2h -0.4~0.1

Note 1: The values in parentheses are indicators for grid bricks or special type bricks.

Note 2: Recommended use: PN-30 can be applied to semi silica bricks for coke ovens and alkali resistant bricks for general industrial furnaces.

Note 3: μ0 represents the mean value of qualified quality batches, σ represents the estimated value of batch standard deviation, U represents the upper specification limit, and L represents the lower specification limit.