Ramming masses are monolithic refractory materials designed to be installed by manual or mechanical ramming. These dry or semi-wet mixes form dense, joint-free linings that offer excellent resistance to heat, abrasion, and chemical attack in high-temperature industrial equipment.

What Are Ramming Masses?

Ramming masses are granular refractory mixtures composed of high-purity aggregates (such as silica, alumina, magnesia, or chromite) and suitable binders. They are compacted by ramming into place without the need for formwork. After drying and firing, they develop high mechanical strength and thermal shock resistance.

Key Advantages:

• Jointless monolithic lining — reduces weak points and increases service life;
• Excellent thermal resistance — suitable for temperatures up to 1800°C;
• High mechanical strength — resists erosion, slag, and spalling;
• Simple installation — no forms or bricks required;
• Custom formulations — available for acidic, basic, or neutral conditions.

Applications:

• Induction furnace linings (coreless and channel furnaces);
• Electric arc furnace bottoms;
• Tundish working linings;
• Ladle back-up linings;
• Foundry runners and troughs;
• Rotary kilns and repair zones.

Types of Ramming Masses:

• Silica ramming mass — for induction furnaces melting mild and low-carbon steel;
• Magnesia ramming mass — ideal for basic slag environments;
• Alumina ramming mass — general-purpose, high-alumina use;
• Chromite and magnesia-chrome ramming — excellent slag resistance;
• Insulating ramming mass — for backup linings and energy efficiency.