Refractory ramming mass features excellent integrity, scour resistance and erosion resistance. It is widely applied to the inner linings of electric furnaces, ladles and high-temperature kilns. The construction process directly determines the quality and service life of furnace linings.
I. Key Construction Points
1. Base Cleaning and Preprocessing：
Clean floating dust, residues, oil stains and loose lining materials on the furnace base surface. Ensure the base is dry and solid, and fix the formwork properly to prevent uneven thickness, delamination and cracking of the lining.
2. Batching and Mixing：
Strictly follow the proportioning standards, control water dosage accurately and mix evenly. Don’t use damp or deteriorated materials to guarantee the forming strength of the finished lining.
3. Layered Compacting：
Fill materials in layers and ram each layer densely. Scratch the surface of every compacted layer to enhance interlayer adhesion. Eliminate hollow and loose defects so as to ensure the overall compactness of the furnace lining.
4. Standardized Baking and Curing：
Rapid high-temperature heating is prohibited after forming. Gradually heat up and dehydrate the lining through stepwise baking to effectively avoid defects such as cracking and spalling.
II. Service Life and Daily Maintenance
Avoid the above adverse conditions during daily production. Clean residues timely after furnace shutdown, inspect the lining and repair damaged parts regularly to extend the service life of the refractory lining.
