- Time:Sep 14, 2023
Ramming mass, also known as refractory ramming mix or furnace lining material, is a refractory material used for lining the walls of induction furnaces, electric arc furnaces, and other high-temperature applications. The performance and characteristics of ramming mass include:
1. High temperature resistance: Ramming mass is designed to withstand extreme temperatures typically encountered in furnace linings, ranging from 1300°C (2372°F) up to 1800°C (3272°F) and higher. It maintains its structural integrity and exhibits minimal softening or deformation at these high temperatures.
2. Good thermal shock resistance: Ramming mass has excellent thermal shock resistance, allowing it to withstand rapid temperature changes without cracking or spalling. This property is crucial in applications where alternating heating and cooling cycles occur frequently.
3. Low porosity: Ramming mass is typically formulated with low porosity, which helps minimize heat transfer through the lining. This low porosity results in better insulation properties and improved energy efficiency by reducing heat loss.
4. Excellent erosion resistance: Ramming mass provides good resistance against erosion caused by molten metals, slag, and corrosive gases. It can withstand the chemical attack and mechanical forces exerted by these substances, thus extending the service life of the refractory lining.
5. Easy installation: Ramming mass is easy to install and shape according to the specific requirements of the furnace. It can be compacted and rammed into place using specialized tools, ensuring proper lining density and adherence to the furnace wall.
6. Customizable compositions: Ramming mass comes in different compositions to suit various applications. Common types include silica-based ramming mass, alumina-based ramming mass, magnesia-based ramming mass, and combinations thereof. Different compositions offer varying levels of temperature resistance, erosion resistance, and chemical compatibility.
7. Mechanical strength: Ramming mass possesses adequate mechanical strength to withstand the forces exerted by the weight of the material and any mechanical stresses encountered during operation. However, it is typically less strong compared to materials like bricks or castables.
8. Desirable flow characteristics: Ramming mass should have appropriate flow characteristics to ensure easy application and compaction. It should be able to maintain its shape after being rammed, providing a cohesive lining with good integrity.
It's important to note that the specific performance and characteristics of ramming mass can vary depending on its composition, grain size distribution, bonding agents, and other additives. Consulting with refractory experts or manufacturers is advisable to select the most suitable ramming mass formulation for a particular furnace or high-temperature application.
