In order to improve the anti-oxidation performance of the castable in the tapping ditch, on the one hand, the density of the castable can be improved, on the other hand, the anti oxidant can be added. Ultra fine metal silicon powder reacts with carbon at high temperature to form silicon carbide, which is oxidized prior to carbon to form a protective film to slow down the oxidation of castable.
In the iron ditch material, two effects can be produced by adding an appropriate amount of ultra-fine metal silicon powder. One is that the oxidation resistance will improve with the increase of the amount of ultra-fine metal silicon powder, and its slag resistance will also improve; The other is that with the increase of the amount of ultra-fine metal silicon powder, the content of aluminum oxide will decrease and the slag resistance will also decrease relatively. When the content of ultra-fine metal silicon powder is 1% and 2%, the slag resistance is improved; When the addition amount is 2% and 3%, the slag resistance is basically the same; When the addition amount is 3%, 4% and 5%, the slag resistance decreases.
