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Silica Bricks for Glass Furnace

Introduction

Firebird glass furnace super duty silica bricks are made from plant owned high purity silica mineral, sintered in gas fueled down draft kiln.

The bricks enjoy the characters of high purity (high SiO2 content, low Fe2O3 content, Low flux factors), high refractoriness under load, high tridymite content, high density & high strength, low true density, low expansion & low creep rate, accurate size tolerance.

Typical Application

Crown and superstructure of glass melting tank and regenerators.

Typical indicators

Grade FBBG-96A FBBG-96B
Guarantee Typical Guarantee Typical
Chemical

Composition %

SiO2 ≥ 96 96.5 ≥ 96 96.1
Fe2O3 ≤ 0.7 0.61 ≤ 1.0 0.8
CaO ≤2.5 2.24 ≤2.5 2.35
Flux Factor

Al2O3+2(K2O+Na2O)

≤ 0.5 0.44 ≤ 0.7 0.60
Refractoriness, ℃ 1710 1710 1710 1710
Apparent Porosity, % ≤21 18 ≤22 20
Bulk Density, g/cm3 1.83 1.88 1.83 1.87
True Density, g/cm3 ≤2.34 2.32 ≤2.34 2.32
Cold Crushing Strength, MPa ≥35 45 ≥30 38
0.2MPa Refractoriness Under load, T0.6 ℃ ≥1680 1695 ≥1680 1690
Permanent Linear Change, % (℃ × 2h) 0~+0.2

(1450)

+0.1 0~+0.3

(1450)

+0.2
20-1000℃ Thermal Expansion ( × 106/℃ ), % 1.25 1.25
Residual Quartz, % ≤1 0.3 ≤1 0.7

Packing

By ISPM15 pallet or as per customer’s request.

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