本发明涉及一种环缝式底吹供气砖，属于冶金技术领域，解决了现有技术中底吹流量过大容易侵蚀耐火材料或管路压力损失过大容易堵塞的问题。环缝式底吹供气砖，包括主体和气体通道，气体通道包括环缝式出气管、气体分配室和进气管，环缝式出气管包括中心管、外层套管和环缝。外层套管的数量为多个，多个外层套管之间或外层套管与中心管之间形成环缝。本发明实现了底吹气体大范围内调节，在提高底吹供气气量的同时实现底吹气体流股分散，并最终实现底吹高效长寿命。

The invention relates to an annular bottom blowing gas supply brick, which belongs to the field of metallurgical technology, and solves the problem that excessive bottom blowing flow is easy to erode refractory materials or pipeline pressure loss is too large and easy to block in the existing technology. The annular bottom blowing air supply brick includes the main body and gas channel. The gas channel includes annular outlet pipe, gas distribution chamber and inlet pipe. The annular outlet pipe includes central pipe, outer casing and annular gap. The number of outer casings is multiple, and ring joints are formed between multiple outer casings or between outer casing and central tube. The invention realizes the wide-range adjustment of bottom blowing gas, realizes the dispersion of bottom blowing gas flow strands while improving the bottom blowing gas supply volume, and finally realizes the efficient and long life of bottom blowing.