Description
What are the types of furnace linings?
Carbon refractories for furnace lining are fired or graphitized refractory bricks or blocks. One is formed by coke and anthracite as the primary raw materials, roasted and processed, and the other is formed by forming, roasted, and graphitized by pitch coke and petroleum coke as the primary raw materials.
The properties of carbon bricks are fan-shaped, wedge-shaped, square, and so on. The shapes of graphite furnace linings are all customized.
Carbon blocks can be used as refractory materials for various furnaces; Graphite furnace lining is only used under special conditions such as ultra-high temperatures and pollution avoidance.
Quality characteristics of carbon block for blast furnace
Resistance to molten iron; alkali resistance; good mechanical properties; heat resistance; resistance to penetration by molten water.
Physical and chemical properties of graphite furnace lining
Graphite lining is generally used as a blast furnace bottom refractory material. Before graphitization treatment, manufacturers generally use coal tar pipitchesor impregnation treatment. This can not only increase the density of the product but also reduce the resistivity, thereby prolonging the service life.
ITME | Specific resistance
(μΩ·m)
|
Compressive strength
(ΜРa)
|
220mm*220mm | ≤12 | ≥20 |
400mm*400mm | ≤13 | ≥18 |