Method for reducing Al2O3 inclusion of low-carbon aluminum killed steel in RH single-connection process

The invention discloses a steelmaking method for reducing Al2O3 inclusion of low-carbon aluminum killed steel by adopting an RH single-connection process. The process route adopting the RH single-connection process comprises the following steps of KR molten iron pretreatment, converter treatment, RH treatment and continuous casting, so that an LE process is omitted; the process comprises the following steps of 1) optimizing a converter blowing process and a tapping process; 2) reducing the carbon and oxygen deposition and oxygen content of converter end point molten steel and the converter tapping slag amount; 3) optimizing a ladle top slag modification process; 4) optimizing the RH treatment process; and 5) optimizing continuous casting process. According to the method, the oxygen content in the steel slag is reduced, and the generation amount of Al2O3 inclusions is reduced; the generated Al2O3 is removed from the steel as much as possible; and molten steel with high inclusion content is prevented from formi