Non-oxidation steelmaking process of intermediate frequency furnace
Acidic furnace lining is mostly used, and the composition of the charge is close to the end composition. Because the acidic lining limits the alkalinity of the slag, the general acidic slag cannot complete the task of desulfurization and dephosphorization, and its ability to transfer oxygen is low, which is not conducive to the progress of diffusion deoxidation. Therefore, the non-oxidation steelmaking process of the acid lining is only a remelting process, a process that completely relies on the pre-melting ingredients to achieve the final composition, and the process quality is not high, but the process is simple, and the obvious weakness is that the smelting process does not oxidize Without a boiling process, it cannot effectively remove all kinds of inclusions in the steel, leaving them in the molten steel, deteriorating the performance of the material; secondly, the thermodynamic conditions of the entire system do not support the oxidation of silicon, and the carbon in the molten steel is released. The aluminum added in the steel will partially reduce the silicon in the slag and the furnace lining under certain conditions. In addition, some blind processes use silicon to deoxidize, which will accumulate for a long time and the silicon content of the finished steel. It is usually hovering at a high position or even out of grid, which is not conducive to improving the mechanical properties of steel.
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