本发明公开了一种转炉底吹粉剂的旋转接头，属于冶金技术领域，解决了现有技术中石灰的利用率不高、转炉底吹输送喷吹粉剂效果不佳以及输粉管路易发生扭曲的问题。旋转接头包括转炉接头、输粉通路、输粉管接头、芯轴和托圈耳轴，输粉通路包括第一输粉管和第二输粉管；芯轴的一端与输粉管接头转动连接，芯轴的另一端与托圈耳轴的一端固定连接，托圈耳轴的另一端与转炉接头固定连接；第一输粉管穿过转炉接头、托圈耳轴和芯轴与第二输粉管密封转动连接，输粉管接头套设于第二输粉管的外侧。上述旋转接头可用于转炉底吹粉剂。

The invention publics a rotary joint for blowing agent at the bottom of converters which belongs to the field of metallurgical technology, and solves the problems of low utilization rate of lime, low effect of conveying and spraying powder blowing agent at the bottom of converters, and easy distortion of pipe for conveying powder in the prior art. The rotary joint comprises a converter joint, a powder conveying line, a powder conveying pipe joint, a mandrel and a ring trunnion, the powder conveying line comprises a first powder conveying pipe and a second powder conveying pipe; One end of the mandrel is rotary connected with the powder conveying pipe joint, the other end of the mandrel is fixed connected with one end of the ring trunnion, and the other end of the ring trunnion is fixedly connected with the converter joint; The first powder conveying pipe is sealed and rotary connected with the second powder conveying pipe through the converter joint, ring trunnion and mandrel, and the powder conveying pipe joint is arranged on the outside of the second powder conveying pipe. The rotary joint can be used for blowing agent at the bottom of converters.