Ramming Application

The spout of the furnace either is rammed with plastic mold refractories. For side wall lining a suitable cylindrical former is essential. The former can be made either removable or consumable type. In the case of a consumable former, the quality of the former should be compatible with the quality of the product (melt) to be produced. Generally, bottom ramming is done first followed by the side wall ramming. Ramming is generally done layer-wise with the help of pneumatic rammers to ensure compaction and packing density. At the same time to avoid lamination between the layers each layer is to be scratched before putting fresh material for further ramming.

The collar rim of the induction furnace crucible is made of the same refractory paste as used for constructing the crucible but with a greater addition of bonding materials & water. Then furnace heating schedule is to be followed carefully which will depend upon the furnace lining thickness, nature of ramming mass, etc