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Low-cement refractory castable used for industrial furnace/high strength, low porosity and low thermal insulation
Product description:
Using high quality bauxite and mullite as the main materials, the ultrafine powder bonded low cement castables for furnace lining are characterized with good flow ability, easy installation, good anti-spalling and thermal shock resistance, low thermal expansion, and good thermal insulation. The products can be widely used at roof, wall and bottom for industrial furnaces.
Low-cement castables
This new generation of products is developed with high quality mullite and bauxite as the main raw material by adding proper corundum, compound ultra-fine powders and efficient dispersion additives, and characterized with good performance at high temperature as well as high strength, low porosity and low thermal insulation.
Category of Refractory Castable:
Features:
These castables can be put into use after short curing and firing period,and can be applied to furnace with tight construction schedule,and the parts being difficultly fired.
Physical and chemical indicators:
Brand | XY-ZL-50 | XY-ZL-60 | XY-ZL-65 | XY-ZL-70 | XY-ZL-75 |
---|---|---|---|---|---|
Al2O3/%,≥ | 50 | 60 | 65 | 70 | 75 |
Bulk density/ g﹒cm-3,≥ | 2.25 (110℃,24h) | 2.35 (110℃,24h) | 2.4 (110℃,24h) | 2.5 (110℃,24h) | 2.6 (110℃,24h) |
Crushing strength/ MPa,≥ | 30 (110℃,24h) | 35 (110℃,24h) | 35 (110℃,24h) | 40 (110℃,24h) | 40 (110℃,24h) |
40 (1300℃,3h) | 40 (1400℃,3h) | 45 (1400℃,3h) | 45 (1400℃,3h) | 50 (1500℃,3h) | |
Permanent linear change/% | ±0.5 (1300℃,3h) | ±0.5 (1400℃,3h) | ±0.5 (1400℃,3h) | ±0.5 (1400℃,3h) | ±0.5 (1500℃,3h) |
Water requirement/% | 6-7 | 6-7 | 6-7 | 6-7 | 5-6 |
Max service temperature/℃ | 1300 | 1400 | 1400 | 1400 | 1500 |
Application | Roof,wall,and partition in the preheat area | Roof,wall,and partition in the heating area |
Production and inspection :
Packaging and transportation: