Furnace lin knotting method for medium frequency furnace
There are two knotting methods for crucible induction furnace lining: wet knotting and dry knotting. Both methods can be used for knotting acidic lining, neutral lining, and alkaline lining.
Wet knotting refers to knotting by adding water, sodium silicate, brine, and other adhesives to the lining knotting material. Because the knotting material contains certain moisture, the dust is less and the formability is good during construction. However, wet knotting also has a series of shortcomings: the knotted lining material is not compact enough, and the refractory of the lining decreases; Lining drying takes a long time. When the moisture in the lining vaporizes, the insulation performance of the inductor decreases. Poor handling often leads to the breakdown of inter-turn fire and may also cause a short circuit to the ground. Therefore, wet tying lining should be avoided as much as possible for larger smelting furnaces.
At present, the dry furnace building method is widely used in the furnace building of crucible induction furnaces. The dry furnace building method without cementing agent can give full play to the refractory performance of the lining material, make the sintering layer of the lining thinner, the powdery layer thicker, reduce the heat dissipation loss of the lining, reduce the tendency of lining cracks, and improve the safety and reliability of the lining.