Quality silica brick for Glass furnace

SiO₂ %

≥95

≥95

≥96

≥96

Fe₂O₃%

≤1.2

≤1.2

≤1.0

≤0.8

Refractoriness/ ℃

≥1710

≥1710

≥1710

≥1710

Apparent porosity/ %

≤22

≤22

≤22

≤22

True Density/（g/cm³）

≤2.35

≤2.35

≤2.34

≤2.34

Cold crushing strength/ MPa

≥20kg

≥30 (25)

≥30 (25)

≥30 (25)

≥30 (25)

＜20kg

≥35 (30)

≥35 (30)

≥35 (30)

≥35 (30)

Refractoriness under load℃

≥1650

≥1660

≥1670

≥1680

Permanent liner change% 1450℃×2h

0~0.2

0~0.2

0~0.2

Al₂O₃+2×(K₂O+Na₂O)%

≥20kg

≤0.7

≤0.6

＜20kg

≤0.7

≤0.5

Purpose

Glass furnace

Notes

The values in parentheses are applicable to non-standard products such as feeding mechanisms and manual brick indicators