A method for producing peritectic steel by a medium-thin slab continuous caster
A medium-thin slab continuous casting and production package technology, which is applied in the manufacture of converters, etc., can solve problems such as breakout, poor castability, and excessive fluctuation of mold liquid level, so as to reduce secondary oxidation and improve castability , the effect of changing the nature
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[0033] Example 1:
[0034] The 137t molten iron was sent to the 120t oxygen top-blown converter for blowing, and the feed was started at 1 / 3 of the converter tapping process after the converter was finished, and finished at 3 / 4. The order of addition was lime, fluorite, and silicon-manganese alloy. , aluminum alloy; lime 680kg, fluorite 170kg, adding a small amount of silicon-manganese alloy, aluminum alloy to reduce the oxidation of slag. When tapping, the double slag blocking process of slag blocking plug and slag blocking rod is adopted, and the thickness of the ladle slag layer is 30mm. After slag making and slag blocking, the final slag basicity is controlled at 3.0, and the endpoint components (weight percentage) are controlled at [C]: 0.08%, [S]: 0.020%, [P]: 0.01%, and the endpoint temperature is 1658°C.
[0035] Then, the molten steel enters the LF refining process. After the ladle arrives at the station, the bottom is blown, and the argon flow rate is guaranteed to ...
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[0040] Example 2:
[0041] The 132t molten iron was sent to the 120t oxygen top-blown converter for blowing, and the feed was started at 1 / 3 of the converter tapping process after the converter was finished, and finished at 3 / 4. The order of addition was lime, fluorite, and silicon-manganese alloy. , aluminum alloy; lime 650kg, fluorite 160kg, adding a small amount of silicon-manganese alloy, aluminum alloy to reduce the oxidation of slag. When tapping, the slag blocking plug and slag blocking rod double slag blocking process are adopted, and the thickness of the ladle slag layer is 25mm. After slag making and slag blocking, the final slag basicity is controlled at 2.9, and the final composition (weight percentage) is controlled at [C]: 0.085%, [S]: 0.020%, [P]: 0.01%, and the end temperature is 1665°C.
[0042] Then the molten steel enters the LF refining process, the ladle is blown at the bottom after arriving at the station, and the flow of argon gas is guaranteed to be ab...
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