Selection of Inner Liner for Medium Frequency Induction Furnace

Posted by adela li on February 14th, 2017

Selection of medium-frequency induction furnace refractory lining material should meet the following requirements:

1, lining materials must have high refractoriness: molten steel when the high temperature up to 1700 ℃, the high temperature of molten iron up to 1500 ℃ or more. Therefore, according to the smelting of the material to choose to meet the refractory raw material melting temperature of the lining material.
2, the lining material should have good chemical stability: high temperature molten steel, high vacuum, high alkaline residue contact, should not participate in chemical reactions, good chemical stability.
3, the lining material of good thermal shock continuous casting dry vibration mix resistance: should have good resistance to abrupt heat, to adapt to high temperature melting to the furnace after the temperature and pressure due to rapid changes in the furnace lining wall stress generated without cracking, thermal shock mullite brick resistance Well, the higher the service life of the lining.
4, the lining material should have a certain high temperature strength: melting process, the furnace wall to withstand the tundish lining impact of metal charge, the liquid metal static pressure, electromagnetic stirring metal liquid movement force, temperature stress and other effects, the lining material should have A certain high temperature strength, in a variety of forces under the action of cracking, erosion resistance.
5, the lining material thermal conductivity is small: melting process, the furnace wall temperature difference is very large, about 10-15% of the heat dissipated through the furnace wall to reduce heat loss to improve thermal efficiency, lining materials have low Thermal conductivity.