Experimental study on different refining processesof low carbon aluminum killed steel
In this paper, two types refining processes of LF+calcium treatment and RH light treatment of low carbon aluminum killed steel were studied in all aspects, the control stability of key elements, the cleanliness of molten steel, the castability of molten steel, and production processes cost of the two pro⁃cesses were systematically compared. The results show: RH light treatment process is more suitable for smelting low carbon aluminum killed steel with carbon content narrow component control;the average ni⁃trogen content of continuous casting tundish in RH light treatment process is 28.2ppm, the average total oxygen content is 28 ppm; the average nitrogen content of continuous casting tundish in LF + calcium treatment process is 34.2ppm, the average total oxygen content is 36ppm, and the content control is unsta⁃ble;the castability of molten steel of LF+calcium treatment process is better than that of RH light treat⁃ment process;the control level of inclusions in RH light treatment process is better than that in LF+cal⁃cium treatment process;the production processes cost of RH light treatment process is lower than that of LF+calcium treatment process. Therefore for smelting low carbon aluminum killed steel, RH light treat⁃ment process should be preferred.
low carbon aluminum killed steelrefiningcalcium treatmentlight treatmentcleanliness of molten steelcastability of molten steel
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