Refined slag control method
A technology for refining slag and a control method, which is applied in the field of iron and steel smelting, can solve problems such as poor castability, and achieve the effect of improving castability and improving the interface reaction ability of steel slag
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Embodiment 1
[0016] Embodiment 1: Control method of refining slag. The process steps are as follows:
[0017] The molten iron is pretreated before entering the furnace. After the treatment, the sulfur content of the molten iron is S: 0.011%, and the temperature is 1296°C. The slag must be cleaned before the molten iron enters the converter. Converter smelting adds molten iron and scrap steel, 86 tons of molten iron and 12 tons of scrap steel. Converter end point control C=0.050%, P=0.015%, temperature 1635°C; strict slag blocking, slag thickness ≤ 50mm, tapping time 5min, 1 / 5 of the tapping Add aluminum deoxidizer to the ladle for deoxidation, and at the same time 550kg of synthetic slag was added to the ladle, the alloy and slag were added to 2 / 5 of the steel, and other alloys were added according to normal requirements; the CAS station carried out strong argon blowing and stirring on the molten steel, the content of acid-soluble aluminum in the steel was 0.081%, and the temperature was ...
Embodiment 2
[0020] Embodiment 2: Control method of refining slag. The process steps are as follows:
[0021] The molten iron is pretreated before entering the furnace. After the treatment, the sulfur content of the molten iron is S: 0.015%, and the temperature is 1289°C. The slag must be cleaned before the molten iron enters the converter. Converter smelting adds molten iron and scrap steel, 89 tons of molten iron and 10 tons of scrap steel. Converter end point control C=0.060%, P=0.015%, temperature 1630°C; strict slag blocking, slag thickness ≤ 50mm, tapping time 5min, tapping 1 / 5 Add aluminum deoxidizer to the ladle for deoxidation, and at the same time 550kg of synthetic slag was added to the ladle, alloy and slag were added to 2 / 5 of the steel, and other alloys were added according to normal requirements; the CAS station carried out strong argon blowing and stirring on the molten steel, the content of acid-soluble aluminum in the steel was 0.076%, and the temperature was 1558 ℃, fe...
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