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Factory direct sales high alumina low cement castable/conventiona dense refractory castable
High alumina castable refractory is monolithic refractory materials, which is made of high alumina aggregateand powder, binder and water reducer, in which the amount of Al2O3 is over 48%. The high alumina castable properties are mainly high mechanical strength, good heat and shock resistance, anti-abrasion and so on. Due to its good performance, refractory high alumina castable is widely used in steel industry, petroleum industry, chemical industry, and other industries. It can be used on the linings of all kinds of furnaces and kilns, such as boiler, blast furnace, hot stove, heating furnace and ceramic kiln.
Performance
Low cement catable is developed on the basis of clay and refractory castables by Kerui Group. It mainly includes low cement, super low cement, no cement or ultra micro powder+sol, etc. Many advantages of refractory castables gather to it, such as high density, low apparent porosity, high strength, low abrasion, thermal shock resistance, corrosion resistance, etc.
Character
The prominent character of low cement castable is high and strong densification which brings benefits of its using:
The CaO in it is lower, which reduces the produce of eutectic phase in material and develop its refractoriness, high temperature strength and slag erosion resistance.
The water used for the blending of castable during construction is only 1/3~1/2 of water for normal use, which realizes low apparent porosity and high bulk & density.
After moulding by casting, the cement compound produced during maintenance is less. There is no damage of large amount of hydrated bond during heating and roasting, which will reduce the medium temperature strength. But for low cement castable, the strength is increasing with the increase of heating temperature.
Adjusting the size composition of castable can compound self-flow castable and pump irrigation castable.
Application
Low cement castable is used in the back kilneye, wicket cover and back of cooling machine of cement rotary kiln and other thermal equipment with good performance and long service life.
Technical Index
Physical and Chemical Indexes of High Alumina low cement castable:
Low Cement Castable | Corundum | High Alumina | Clay | ||||
KR-90 | KR-80 | KR-70 | KR-60 | KR-50 | KR-40 | ||
Chemical composition % ≥ | Al2O3 | 90 | 80 | 70 | 60 | 50 | 40 |
CaO | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | |
Bulk density g/cm3≥ | 110℃×24h | 2.95 | 2.75 | 2.6 | 2.5 | 2.4 | 2.3 |
1500℃×3h | 2.9 | 2.7 | 2.6 | 2.4 | 2.4 | 2.3 | |
Compressive strength MPa ≥ | 110℃×24h | 60 | 45 | 45 | 40 | 40 | 40 |
1500℃×3h | 80 | 75 | 70 | 60 | 60 | 60 | |
Breaking strength MPa ≥
| 110℃×24h | 8 | 7 | 6 | 6 | 6 | 6 |
1500℃×3h | 10 | 10 | 10 | 8 | 8 | 8 | |
Linear Change PLC % ≤
| 110℃×24h | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
1500℃×3h | -0.5 | -0.5 | -0.5 | -0.5 | -0.5 | -0.2 | |
Max. service temperature ℃ | 1700 | 1600 | 1500 | 1450 | 1400 | 1350 |
Related technical parameters should be appointed temporarily in the contract according to the specific service environment.
Currently, our products have been used in many carbon burning furnaces, CFB boilers in power plant, cement rotary kilns, non-ferrous metal melting furnaces, blast furnaces, hot-blast furnaces, coking furnaces, steel ladles, glass melting kilns and other high temperature industries all over the world.
FAQ & Our Service
1.Are you a trader or manufacturer?
We are manufacturer, we have own factory.
2.Can you accept OEM or ODM?
Of course, Logo is also acceptable.
3.What is the delivery time?
About 10-20 days after the contract signing.
4.What is your payment methods?
T/T L/C D/P Paypal West Union and others.
SERVICE
1. Timely response : To your inquiry in 24 hours, quickly respond mails and provide solutions.
2. Free sample : Sample and trial order are accepted for the quality evaluation.
3. Shorter delivery time : Book the earliest vessel or plane to guarantee the delivery time.
4. Professional Services : Provide high temperature solutions and professionals installation and technology services for you.
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