Silica Bricks for Coke Oven
PRODUCT SPECIFICATIONS
GB STANDARDS
Items | Standard (JG-94) | |||
(LD) | (LB) | (QT) | ||
ω(SiO2) / % | μG | ≥94.5 | ≥94.0 | |
σ | 1.0 | 1.0 | ||
ω(Al2O3) / % | μG | ≤1.2 | ≤1.5 | |
σ | 0.3 | 0.3 | ||
ω(Fe2O3) / % | μG | ≤1.2 | ≤1.5 | |
σ | 0.2 | 0.2 | ||
ω(CaO) / % | μG | ≤3.0 | ≤3.0 | |
σ | 0.35 | 0.35 | ||
ω(Na2O+K2O) / % | μG | ≤0.35 | ≤0.35 | |
σ | 0.04 | 0.04 | ||
Apparent porosity / % | μG | ≤22 | ≤24(26ᵇ) | |
σ | 1.5 | 1.5 | ||
Cold crushing strength / MPa | μG | ≥40 | ≥35 | ≥28 |
σ | 10 | 10 | 10 | |
Xmin | 30 | 25 | 20 | |
0.2MPa Refractoriness under load / ℃ | μG | ≥1650 | ||
σ | 13 | |||
True Density /（g/cm3） | μG | ≤2.33 | ≤2.34 | |
σ | 0.1 | 0.1 | ||
Residue Quartz / % | μG | ≤1.5 | ||
σ | 0.5 | |||
Permanent linear change in heating（1450℃x2h）/ % | Xmin~Xmax | 0~0.2 | ||
Thermal expansion（1000℃）/ % | μG | ≤1.28 | ≤1.30 | |
σ | 0.05 | 0.05 | ||
Note: The items in bold are assessment items, and only one of the three quality characteristic indicators, residual quartz, true density, and heating permanent line change, can be tested during quality inspection.
{a} The measured single value of compressive strength should be greater than the specified value of Xmin; {b} The values in parentheses are the indicators for ultra special bricks; {c} The thermal expansion rate is a reference value.
DIN STANDARDS
Items | KD/KS Heating wall and chamber | KN Regenerator, corbel area and oven top, oven wall | Test Standards | |||
SiO2% | μG | ≥95 | ≥94.5 | GB/T 6901 DIN51070 Teil2 6 | ||
σ | 1.0 | 1.0 | ||||
Al2O3% | μG | ≤1.5 | GB/T 6901 DIN51070 Teil3 6 | |||
σ | 0.3 | |||||
Fe2O3% | μG | ≤1.0 | GB/T 6901 DIN51070 Teil 56 | |||
σ | 0.2 | |||||
CaO% | μG | ≤3.0 | GB/T 6901 DIN51070 Teil 76 | |||
σ | 0.35 | |||||
Na2O+K2O% | μG | ≤0.35 | GB/T 6901 DIN51070 Teil 86 | |||
σ | 0.02 | |||||
Residue Quartz % | μG | ≤1.5 | YB/T 172 XRD | |||
σ | 0.5 | |||||
Apparent porosity % | μG | ≤22 | DIN51056 | |||
σ | 1.3 | |||||
Cold crushing strength（Mpa） | KD≥35 10 25 | KS≥45 10 30 | ≥28 10 20 | DIN51067 Teil 1 | ||
Refractoriness under load ℃ 0.2MPa | μG | ≥1650 | ≥1640 | DIN51064 YB/T370 | ||
σ | 25 | 25 | ||||
Creep | %Z5~25 | μG | ≤0.12 | DIN51053 Teil 2 | ||
σ | 0.05 | |||||
Z25 | μG | ≤0.35 | ||||
σ | 0.1 | |||||
Refractoriness μGσ | 170（SK 3 1） 2（SK 1） | DIN51063 Teil 1 | ||||
Baume Abrasion Degree ΔL | KS≤4.5 1.0 | DIN52108 | ||||