Description of High aluminum castable
High-alumina refractory castable is a casting material consisting of high-alumina minerals, binders and additives, of which high-alumina minerals are the main component of high-alumina casting materials, the content of which usually exceeds 70%. High-alumina minerals such as kaolin, bentonite, mullite, etc. are commonly used.
Characteristics of High aluminum castable
| Name | ВГБС-1 | ВГБС-2 | ВГБС-3 | ВГБС-4 | |
|---|---|---|---|---|---|
| AL2O3 %, ≧ | 70 | 70 | 80 | 85 | |
| CaO%, ≦ | 2.5 | 2.5 | 2.5 | 2.5 | |
| Плотность г/см3,＞ | 2.6 | 2.75 | 2.8 | 2.9 | |
| холодная дробления прочности (мпа) | 110℃*24h | ＞60 | ＞65 | ＞70 | ＞75 |
| 1000℃*3h | ＞75 | ＞80 | ＞85 | ＞90 | |
| 1400℃*3h | ＞90 | ＞95 | ＞105 | ＞110 | |
| прочность на разрыв (мпа) | 110℃*24h | ＞8.50 | ＞9.30 | ＞10.0 | ＞11.5 |
| 1000℃*3h | ＞10.5 | ＞11.5 | ＞12.0 | ＞13.0 | |
| 1400℃*3h | ＞13.0 | ＞13.5 | ＞15.0 | ＞16.0 | |
| коэффициент износостойкости /cm³ | ＜9.6 | ＜8.5 | ＜7.3 | ＜6 | |
| Огнеупорность под нагрузкой, (℃) | ＞1450 | ＞1490 | ＞1530 | ＞1560 | |
| Термическая стойкость / раз ( 900 градусов , воды ) | ＞20 | ＞20 | ＞20 | ＞20 | |
| Максимальная рабочая температура, ℃ | 1550 | 1550 | 1600 | 1600 | |
| Линейное Изменение,% | ＜-0.3 | ＜-0.3 | ＜-0.2 | ＜- | |
Advantages of high-alumina refractory castable
Good stability
High-alumina refractory concrete mixtures are stable under high temperature conditions, do not expand or contract, ensuring stable operation of equipment.
High temperature resistance
High-alumina refractory concrete mixtures are able to withstand thermal loads and thermal cycling at high temperatures and have good refractory properties. They are able to maintain structural stability and strength at high temperatures and are not easily melted or softened.
Erosion resistance
High-alumina refractory concrete mixtures have good resistance to erosion by many chemicals such as acids, alkalis and salts. They resist erosion by aggressive gases and liquids and extend the service life of equipment.
Anti-wear properties
Due to its high hardness and wear resistance, high alumina refractory concrete mixes are resistant to particle washout, abrasion and wear. This makes it an excellent performer in some highly abrasive environments such as iron ore aqueducts and ore kilns in the metallurgical industry.
Simple design
High alumina refractory concrete mix has good structural properties and can be produced by pouring and spraying methods. It can be adapted to various shapes and sizes of structures and is well combined with other materials.
Good thermal insulation properties
Due to the low thermal conductivity of high-alumina refractory castable, it provides good insulation and reduces heat transfer and loss.
Application of high-alumina refractory castable
Cement kilns
High-alumina refractory castable are widely used as lining for cement kilns. Cement kilns are equipment for sintering clinker at high temperatures. High-alumina casting materials are able to withstand high temperatures and chemical exposure, protecting the kiln body from erosion and simultaneously ensuring normal sintering of clinker.
Blast furnace
High-alumina refractory castable are widely used for lining blast furnaces and furnace cylinders. Blast furnace is an equipment for smelting iron. High-alumina casting materials can withstand thermal stress and chemical erosion during high-temperature smelting process and protect the refractory structure of the blast furnace shell and lining.
Glass furnaces
High alumina refractory castable are widely used in the inner lining and hearth of glass furnaces. Glass furnaces are used to produce glass, and high alumina casting materials can withstand high temperatures and chemical effects during the glass melting process and protect the refractory structure of the furnace.
Oil cracking furnaces
Oil cracking furnaces are the equipment used in the production of oil cracking, and high-alumina refractory castable are used in the lining and chamber sections of oil cracking furnaces. It can withstand high temperatures and corrosive gases, protect the refractory structure of the furnace chamber, and prolong the service life of the equipment.
Ceramic stoves
In ceramic kilns, high alumina refractory castable are mainly used for lining and sealing of ceramic kilns to ensure the quality and productivity of ceramics.
Steelmaking furnaces
In steelmaking furnaces, high alumina refractory castable are mainly used for lining and sealing equipment such as ladles and hot metal ladles to ensure the quality and productivity of steel production.
