Description of the Pre-cast Block
Refractory refractory elements refer to unmolded refractory materials, also known as cast precast blocks, unmolded refractory precast blocks. This is because the composition of raw materials, the principle of preparation, the use of binders and additives are basically the same as those of non-formed refractory materials.
Classification of Pre-cast Block
- By aggregate: high alumina, fireclay, chamotte, dinas, corundum, etc.
- By weight: large, medium and small refractory prefabricated blocks
- By shape: rectangular, square, arched, circular or shaped products
- Some precast parts with reinforcement and anchors can also be divided into ordinary precast parts, reinforced precast parts and anchor precast blocks, etc.
Огнеуорные бетонные корундовые и высокоглиноземистые изделия
| Марка изделий | Characterization |
|---|---|
| КБИ-95 | Корундовые бетонные изделия, изготовление на основе белого электрокорунда |
| КБИ-90 | |
| ВБИ-80 | Высокоглиноземичтый бетоннве изделия, изготовление на основе плавленных материалов |
| ВБИ-75 | |
| КШБИ | Коруновые шпинельсодержащие бетонные изделия, изготовленные на основе белого электрокорунда и алюмомагниевой шпинели |
| ККБИ | Корундо-карбидкремниевые бетонные изделия |
По химическим и физико-механическим показателям соответствуют следующим требованиям:
| Name of indicators | Norm for brand | |||||
|---|---|---|---|---|---|---|
| КБИ-95 | КБИ-90 | ВБИ-80 | ВБИ-75 | КШБИ | ККБИ | |
| Содержание оксидов,% | ||||||
| Al2O3, not less | 95.0 | 90.0 | - | 75.0 | 85.0 | - |
| Al2O3 + Cr2O3, не менее | - | - | 80.0 | - | - | - |
| MgO, no less | - | - | - | - | 5.0 | - |
| Al2O3 + SiC, не менее | - | - | - | - | - | 90.0 |
| CaO, not more | 2.5 | 2.5 | 8.0 | 9.5 | 2.5 | 2.5 |
| Предел прочности при сжатии, МПа, не менее | 40 | 40 | 35 | 20 | ||
| Плотность изделий, 110℃,кг/м3, не менее | 2900 | 2700 | 2800 | 2600 | ||
Advantages and application of Pre-cast Block
In industrial furnaces and thermal equipment, the use of prefabricated refractory blocks can achieve mechanized lifting, save labor, shorten construction period and improve furnace efficiency. Prefabricated refractory blocks are widely used in blast furnaces, hot blast furnaces, heating furnaces, electric furnace roofs, kilns with roasting shafts, pelletizing furnaces and other thermal furnaces.
