The effect of iron on silicon bricks in coke ovens
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During the furnace heating process, a supervisor would often emphasize to new employees that they must never drop iron into the coke oven, as iron corrodes the silica bricks in the oven, causing serious damage to it. From a chemical perspective, how does iron corrode silica bricks? Chemical equation?
Iron can form low-melting eutectics with silica bricks, causing wear and damage to the refractory materials!
In the presence of iron, silicon dioxide in the silica brick reacts with carbon to produce carbon monoxide and silicon monoxide; this phenomenon is known as iron-corroded silica brick. It results in the formation of multiple fluid-like grooves on the surface of the silica brick, which thins the brick and increases its resistance