Brief Introduction
Alumina carbon brick is also called aluminum carbon firebrick. It is a carbon based refractory material made from corundum (high grade bauxite, mullite, etc.) aggregates and fines, graphite, binders and additives. According to the production process, alumina carbon composite refractory bricks are divided into burned aluminum carbon bricks and unburned aluminum carbon bricks.
The Common Alumina Carbon Brick is Burned Micro-pores Alumina-Carbon Brick is mainly used for working lining of bosh above the air pip and belly. The average pore diameter of micro-pore alumina carbon brick is less than 1µm, and the volume percentage of the pores less than 1µm is no less than 70%.
Technical Datas
| Item | Index | ||
| RSAC-1 | RSAC-2 | RSAC-3 | |
| Al 2 O 3 ,% ≥ | 65 | 60 | 55 |
| C,% ≥ | 11 | 11 | 9 |
| Fe 2 O 3 ,% ≤ | 1.5 | 1.5 | 1.5 |
| Bulk density, g/cm 3 ≥ | 2.85 | 2.65 | 2.55 |
| Apparent porosity, % ≤ | 16 | 17 | 18 |
| Cold crushing strength, Mpa ≥ | 70 | 60 | 50 |
| Refractoriness under load(0.2Mpa, Ti) °C ≥ | 1650 | 1650 | 1600 |
| Thermal shock stability, times ≥ | 100 | 100 | 100 |
| Iron liquid corrosion index,% ≤ | 2 | 3 | 4 |
| Air permeability, mDa ≤ | 0.5 | 2 | 2 |
| Average pore size, mm≤ | 0.5 | 1 | 1 |
| Less than 1mm Pores volume percentage % ≥ | 80 | 70 | 70 |
| Anti-alkali performance,% ≤ | 10 | 10 | 15 |
| Thermal conductivity, w/m·k ≥ | 13 | 13 | 13 |
Application
Aluminum carbon bricks can be used in blast furnaces, continuous casting tundishes (long nozzles, submerged nozzles, stoppers, upper and lower nozzle bricks, slide plate bricks), ladle, hot metal cans, torpedoes and other thermal equipment.
★ Aluminum Carbon Bricks Manufacture Process
Add graphite raw materials to alumina raw materials (corundum, mullite, bauxite), add small amounts of other raw materials such as silicon powder and SiC powder, then mixed with resin or asphalt binder, molded by press machine and finally fired at about 1300 ° C in a reducing atmosphere kiln.
★ What are the Raw Materials and Binders for Making Aluminum Carbon Bricks
For the unfired aluminum carbon bricks, the commonly used raw materials are: corundum, mullite, first-grade high-alumina bauxite clinker, graphite, SiC and Si powder. Commonly used binding agents are: resin, tar, asphalt and the like. Different raw materials should be used for the production of aluminum carbon bricks based on applications.
The above is a brief introduction of aluminum carbon bricks. If you need to purchase aluminum carbon bricks, RS Refractory can supply you the best quality products with competitive price. We can also customize refractory products according to your requirements and provide you best refractory materials and engineering solutions.
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