本发明是一种超低碳钢快速脱硫的冶炼方法，采用铁水倒罐→铁水预处理→转炉留氧操作→转炉炉后CAS位炉渣钙处理→RH炉真空脱碳→RH炉合金化及真空脱气→RH工序采用铝丝预脱氧→LF精炼炉铝丝、铝线脱氧、石灰造渣→CCM的工艺流程，通过铁水脱硫扒渣，转炉出钢留氧制度和造渣制度，转炉炉后CAS位对炉渣进行钙处理，RH炉真空脱碳、合金化、脱气控制，RH出钢前向渣面加30～50Kg铝丝进行预脱氧，LF炉铝丝扩散脱氧造渣和喂铝线沉淀脱氧相结合进行深脱硫，冶炼过程全程合理的钢包氩气底吹控制，充分发挥冶金热力学和动力学条件，使LF炉在30分钟内将钢水中的硫含脱至0 .0010%以内，钢水硫含量控制稳定，铸坯质量良好。

The invention is a smelting method for fast desulphurization of ultra-low carbon steel. It adopts the technological process of molten iron pouring tank, molten iron pretreatment, bof oxygen retention operation, CAS slag treatment after BOF furnace, RH furnace vacuum decarburization, RH furnace alloying and vacuum degasser, RH process using aluminum wire pre-deoxidation, LF refining furnace aluminum wire and aluminum wire deoxidation, lime slagging, AND CCM. Through hot metal desulfurization and slag raking, converter steel leaving oxygen system and slag making system, CAS position after converter slag for calcium treatment, RH furnace vacuum decarburization, alloying, degassing control, RH steel forward slag surface with 30 ~ 50Kg aluminum wire for pre-deoxidization, LF furnace aluminum wire diffusion deoxidization slag-making and feeding aluminum wire precipitation deoxidization combined for deep desulfurization, Reasonable argon bottom blowing control in ladle throughout the smelting process, giving full play to metallurgical thermodynamics and dynamics conditions, so that the sulfur content in molten steel can be removed to less than 0.0010% in 30 minutes in LF furnace, the sulfur content in molten steel is controlled stably, and the casting billet quality is good.