hige pure graphite block
The hige pure graphite block is mainly used as a sliding nozzle slide, a continuous casting tundish integral stopper, etc., and can also be used as a lining for molten iron pretreatment and a ladle lining.
This series of products-bauxite clinker, corundum and graphite as the main materials, incorporates a variety of differential additives, has the advantages of good microporous index, excellent alkali resistance, and high thermal conductivity. Suitable for parts of furnace waist, furnace belly, cooling stave aluminum bricks and other parts with different furnace capacities and high aluminum
Carbon-containing refractory products made of corundum (or high alumina bauxite, mullite) and graphite as the main raw materials. According to the different manufacturing processes, hige pure graphite block can be divided into fired hige pure graphite block and non-fired hige pure graphite block.
The key points of the process of making hige pure graphite block: the main raw material of alumina is mixed with carbon raw material, and a small amount of other raw materials such as silicon powder, SiC powder and aluminum powder are added. Mixing, isostatic pressing (or machine pressing), and firing in a reducing atmosphere.
The key points of the craftsmanship of making unburnt hige pure graphite block are the same as unburnt bricks.
The physical and chemical properties of firing hige pure graphite block and non-fired hige pure graphite block are shown in the table.
The fired hige pure graphite block belongs to ceramic bonding or ceramic-carbon composite bonding material. It is widely used as sliding nozzle slide plate, shroud nozzle, immersion nozzle upper and lower nozzle brick and integral stopper rod for continuous casting. The unburned hige pure graphite block is a carbon-bonded material. Because the oxidation resistance is significantly better than that of magnesia-carbon bricks, and the corrosion resistance of Na2O series slag is excellent, it has been widely used in hot metal pretreatment equipment.