Manufacture of very-low carbon steel
专利汇可以提供Manufacture of very-low carbon steel专利检索，专利查询，专利分析的服务。并且PURPOSE:To manufacture very-low carbon steel by the use of a small amount of an inert gas by a procedure in which a steel is decarburized and refined in an oxygen top-blown rotary converter and then after sotpping the oxygen-refining, an oxidative gas and an inert gas are blown into the molten steel from the bottom with a specific carbon content as a boundary. CONSTITUTION:Steel is decarburized and refined to C 0.06% by means of oxygen- blowing in an oxygen top-blown rotary converter provided with a bottom blowing nozzle. Then, after stopping the oxygen-refining, an oxidative gas composed primarily of CO2 is blown into the molten steel at a blowing rate meeting the formula Qo(Nm /min/ton of steel)=-0.55log[C]-0.550o [where [C] is % of carbon present in steel ] from the lance at the bottom of the converter for decarburization to attain C 0.025%. Then, the oxidative gas from the bottom lance is switched to an inert gas, e.g., Ar, and blown into the molten steel at a blowing rate meeting the formula Qi (Nm /min/ton/ of steel)=0.0175ti-0.631o (ti is the time of blowing in min) for decarburization to attain C，下面是Manufacture of very-low carbon steel专利的具体信息内容。
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