Castable Refractory for Heating Furnace

The heating furnace is operated at high temperatures, and the working temperature is generally below 1400°C. Castable refractory for heating furnace is essential. Due to the change of temperature, a certain temperature gradient is formed, and the lining of the high temperature furnace gas is easy to fall off.

The refractory material for the furnace has excellent heat preservation and thermal shock stability. The furnace body of the heating furnace itself is firm, the heating rate is fast, energy saving and convenient operation. Among them, the mostly used refractory materials are refractory bricks and castable refractory for heating furnaces.

Rongsheng low cement castable for heating furnace
Rongsheng Castable Refractory for Heating Furnace

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The refractory material for the heating furnace not only supports the overall skeleton of the heat treatment furnace, but also requires sufficient fire resistance, high temperature strength and outstanding stability.

RS Lightweight Castable
RS Lightweight Castable

Rongsheng Refractory Manufacturer refractory product features of refractory castables for heating furnace: good integrity, easy construction, high strength and good thermal shock resistance.

RS Bulk Low Cement Castable
RS Bulk Low Cement Castable

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Specification of Refractory Castable for Heating Furnace

Item Low Cement Castable Lightweight Castable
RSDJ-60 RSDJ-70 RSDJ-50 RSQJ-1 RSQJ-2
Al2O3 (%) ≥ 60 70 50 40 35
CaO (%) ≤ / / / 20 15
110℃ Dry Bulk Density (g/cm3) ≥ 2.5 2.6 2.3 0.9 1.4
Cold Crushing Strength (MPa) ≥ 110℃ * 24h 30 40 15 2.5 12
1100℃ * 3h 40 50 30 1.5 6
1400℃ * 3h 60 70 1350℃ * 3h

60

/ /
Modules of Rupture (MPa) ≥ 110℃ * 24h 7 8 9 0.8 3
1100℃ * 3h 8 9 6 0.5 2
1400℃ * 3h 10 12 1350℃ * 3h

12

/ /
Permanent Linear Change (%) 1400℃ * 3h

±0.5

1500℃ * 3h

±1.0

1350℃ * 3h

±0.5

110℃ * 24h  0~-0.2

1000℃ * 3h  0~-1.5

1400℃ * 3h

0

Thernal Conductivity (W/m·k) ≤ 600℃ / / / 0.25 0.37
1000℃ / / / 0.38 0.45
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