How to extend the life of magnesia carbon brick for slag line

The wetting Angle of the two kinds of LF furnace slag to MG-carbon brick is less than 90°, which is easy to wet the surface of MG-carbon brick, and the damage rate of MG-carbon brick will be accelerated when it is in contact with MG-carbon brick, and the wetting phenomenon of low iron LF slag is more obvious. In the erosion experiment, this phenomenon reduces the corrosion resistance of magnesia-carbon bricks in contact with low-iron slag.

In order to prolong the slag erosion resistance life of magnesia carbon brick of LF furnace, a stable slag hanging layer can be formed on the surface of magnesia carbon brick by adjusting the composition of molten slag, increasing the wetting Angle of molten slag on magnesia carbon brick, preventing the oxidation of surface graphite and inhibiting the wetting of molten slag on the surface of magnesia carbon brick, or by optimizing the matrix structure of magnesia carbon brick, improving the introduction form and addition amount of graphite in magnesia carbon brick. Adjust the composition of the substrate, so as to affect the number, size, shape and distribution of pores formed by carbon oxidation during the use of magnesia carbon brick, and then extend the service life of LF slag line magnesia carbon brick.