Zhengzhou Annec Industrial Co., Ltd.
Continuously Pushing Forward R& D of HBS for BF and Progress of Refractory Technology To Become Preferred Global Supplier in High Temperature Industry
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2.5 CaO High Alumina Refractory Castable Cement For Stove
| Item | NL-75 | NL-60 | NN-45 | GL-85 | GL-70 | GL-60 | GN-50 | GN-42 | DL-80 | DL-60 | LL-75 | LL-60 | LL-45 | BN-40 | |
| Al2O3 % | ≥75 | ≥60 | ≥45 | ≥85 | ≥70 | ≥60 | ≥50 | ≥42 | ≥80 | ≥60 | ≥75 | ≥60 | ≥45 | ≥40 | |
| CaO % | - | - | - | - | - | - | - | - | ≥2.5 | ≥2.5 | - | - | - | - | |
| Refractoriness ℃ | ≥1760 | ≥1720 | ≥1700 | ≥1780 | ≥1720 | ≥1700 | ≥1660 | ≥1640 | ≥1780 | ≥1740 | ≥1780 | ≥1740 | ≥1700 | - | |
| Rate of permanent linear change of heating, % (3h,≤±1%) | 1450℃ | 1400℃ | 1350℃ | 1500℃ | 1450℃ | 1400℃ | 1400℃ | 1350℃ | 1500℃ | 1500℃ | 1500℃ | 1450℃ | 1350℃ | 1000℃ | |
| Cold crushing strength, Mpa | after dry 110℃ ±5 | ≥10 | ≥9 | ≥8 | ≥35 | ≥35 | ≥30 | ≥30 | ≥25 | ≥40 | ≥30 | ≥30 | ≥25 | ≥20 | ≥20 |
| Cold bending strength MPa | after dry 110℃ ±5 | ≥2 | ≥1.5 | ≥1 | ≥5 | ≥5 | ≥4 | ≥4 | ≥3.5 | ≥6 | ≥5 | ≥5 | ≥4 | ≥3.5 | - |
Refractory castable is one of the unshaped refractory materials.It is made of refractory aggregate . refractory powder .
binders and other additives. It is loose, No fixed shape,Has high liquidity, Casting and vibration molding,
Can use directly or use after add appropriate water or other liquid. It is one of the new type refractory material of don't need calcination.
Refractory castable is composed of refractory aggregate, powder, binder, additive, water or other liquid materials. It is
generally use by pouring directly or by hydraulic vibrating due to its strong liquidity. Besides, it can also be made into a
preform which we call it refractory precast.
Construction way:casting+vibration moulding
Features and advantages:
1. High refractoriness, High refractoriness under load.
2. High density, low porosity.
3. Good slag resistance and corrosion resistance.
4. High strength and wear resistance.
5. Good resistance to flake performance.
6. Good thermal shock stability.
7. Scouring resistance
8. Good hot strength.
Application:
It is widely used in metallurgical industry, petrochemical industry, power plant, construction field and other industries. This kind of castable refractory mainly includes high alumina low cement castable, corundum low cement castable and mullite low cement castable, which can be used for furnaces and boilers in different areas according to various composition. Fire clay and high alumina low cement refractory castable can both be used on the linings of heat furnace, soaking furnace and other heat treatment furnaces.
Specifically, with different aggregates, it is applied on different kilns. Millute low cement castable can be used on the lining of high temperature burner and wrapping lining of heating furnace water cooling tube, and corundum and chrome corundum low cement castable can be used on lining of frequency induction furnace and high temperature areas of petrochemical catalytic cracking reactor.
