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Low cement refractory castable
Low cement refractory castables refer to castables with CaO content less than 2.5% in calcium aluminate cement bonded refractory castables, that is, c
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Low cement refractory castables refer to castables with CaO content less than 2.5% in calcium aluminate cement bonded refractory castables, that is, castables with a calcium aluminate cement addition of about 1/2 to 1/3 of ordinary calcium aluminate cement castables.
Low cement refractory castables are divided into three types: corundum, high alumina, and clay, with usage temperatures of 1700 ℃, 1400-1600 ℃, and 1350 ℃, respectively.
Low cement refractory castables have the following characteristics:
1. The low CaO content in the castable can reduce the formation of low eutectic phases in the material, thereby improving the refractoriness, high temperature strength, and resistance to slag erosion;
2. The blending water consumption of the pouring material during construction is only 1/3 to 1/2 of that of ordinary pouring material, resulting in low porosity and high bulk density;
3. After pouring and forming, there is less cementitious material generated during curing, and there is no significant hydration bond damage during heating and baking, resulting in a decrease in medium temperature strength. Instead, as the heat treatment temperature increases, the strength gradually increases;
4. By adjusting the strength composition of the casting material appropriately, it can be formulated into self flowing casting material and pump pouring casting material.
Performance indicators of low cement refractory castables
| Project | Jadeite quality | High alumina | High alumina | High alumina | High alumina | fireclay | |
|---|---|---|---|---|---|---|---|
| brand | DGJ－90 | DLG－80 | DLG－70 | DLG－60 | DLG－50 | DNJ－40 | |
| Chemical composition% | AL₂O₃％ | ≥90 | ≥80 | ≥70 | ≥60 | ≥50 | ≥40 |
| CaO％ | ≤2.5 | ≥2.5 | ≥2.5 | ≥2.5 | ≥2.5 | ≥2.5 | |
| Volume density g/cm ³ | After drying at 110 ℃ for 24 hours | ≥2.95 | ≥2.75 | ≥2.60 | ≥2.50 | ≥2.40 | ≥2.30 |
| After drying at 1500 ℃ for 3 hours | ≥2.90 | ≥2.70 | ≥2.60 | ≥2.40 | ≥2.40 | ≥2.30 | |
| Compressive strength MPa | After drying at 110 ℃ for 24 hours | ≥60 | ≥45 | ≥45 | ≥40 | ≥40 | ≥40 |
| After drying at 1500 ℃ for 3 hours | ≥80 | ≥75 | ≥70 | ≥60 | ≥60 | ≥60 | |
| Flexural strength MPa | After drying at 110 ℃ for 24 hours | ≥8 | ≥7 | ≥6 | ≥6 | ≥6 | ≥6 |
| After drying at 1500 ℃ for 3 hours | ≥10 | ≥10 | ≥10 | ≥8 | ≥8 | ≥8 | |
| Line change rate% | After drying at 110 ℃ for 24 hours | ≤﹣0.1 | ≤﹣0.1 | ≤﹣0.1 | ≤﹣0.1 | ≤﹣0.1 | ≤﹣0.1 |
| After drying at 1500 ℃ for 3 hours | ≤﹣0.5 | ≤﹣0.5 | ≤﹣0.5 | ≤﹣0.5 | ≤﹣0.5 | ≤﹣0.2 | |
| Maximum operating temperature ℃ | 1700 | 1600 | 1500 | 1450 | 1400 | 1350 | |
Low cement refractory castable product display
Construction case of low cement refractory castable
Experienced construction team with over 10 years of construction experience
Dedicated line delivery, fast delivery, greatly reducing transportation cycle
Regular follow-up visits by the after-sales team
24-hour rapid response and 48 hour on-site arrival
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