Andalusite refractory bricks use andalusite as raw material, add sillimanite powder, mullite powder, and other powders, add binders according to the proportion, and strictly control the particle size, grade, and impurities such as TiO2 and R2O of the raw materials. After smelting, forming, and drying, it is fired at high temperatures, which can meet the needs of different parts and working environments of modern blast furnace hot blast stoves, and plays an important role in improving the service life of blast furnace hot blast stoves.
Andalusite brick’s physical and chemical indicators
รายการ | ดัชนี | ||||
RH155 | RH150 | RH145 | RH140 | RH135 | |
อัล2อ3 % | ≥69 | ≥65 | ≥61 | ≥57 | ≥53 |
เฟ2อ3 % | ≤1.0 | ≤1.0 | ≤1.2 | ≤1.2 | ≤1.5 |
ทีโอ2 % | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.6 | ≤0.6 |
ความหนาแน่นรวม กรัม/ซม3 | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 |
ปรากฏความพรุน % | 2.55~2.70 | 2.50~2.65 | 2.45~2.60 | 2.40~2.55 | 2.35~2.50 |
ความแรงของการบดเย็น MPa | ≥55 | ≥55 | ≥50 | ≥50 | ≥40 |
0.2การหักเหของแสง Mpa ภายใต้โหลด ℃ | ≥1700 | ≥1700 | ≥1650 | ≥1600 | ≥1520 |
อัตราการเปลี่ยนแปลงเชิงเส้นถาวร % | 1500℃×2h ±0.2 | 1500℃×2h ±0.2 | 1500℃×2h ±0.2 | 1450℃×2h ±0.2 | 1450℃×2h ±0.2 |
Creep Rate % 0.2MPa 0~50h | ≤0.8 1550℃ | ≤0.8 1500℃ | ≤0.8 1450℃ | ≤0.8 1400℃ | ≤0.8 1350℃ |
Features of andalusite brick
- ทนต่ออุณหภูมิสูง, ความต้านทานการสึกหรอ, และทนต่อการกัดกร่อน.
- ทนต่อแรงกระแทกจากความร้อนได้ดี.
- Low creep rate.
- อุณหภูมิอ่อนตัวสูงภายใต้โหลด.
- Can reduce harmful impurities.
- Good thermal peeling resistance.
- Various specifications
- Adequate inventory, delivery on time
The raw material of andalusite brick
Mullite powder, andalusite fine powder, sillimanite fine powder, ดินเหนียว, silicon micro powder, เป็นต้น.
Andalusite refractory brick manufacturing process
Prepare the raw materials according to the formula ratio, then put the mullite powder, andalusite fine powder, and sillimanite fine powder into the sand mixer for mixing, then add clay and 2% of the total weight of the raw materials for mixing, and then add silicon The micro powder is mixed and pressed into adobe by a brick press machine. After the adobe is dried, it is put into a firing kiln for sintering, นั่นคือ, it is fired into an andalusite refractory brick.
The use of andalusite bricks in hot blast stoves
For hot blast furnace walls, checker bricks, furnace roof, and combustion chamber (andalusite low creep series).
Andalusite brick transportation
After the factory receives the order, it will be produced as soon as possible and will be shipped within 7-12 วัน. Customized products will take longer.
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