Fluidization blast cap used for preventing slag leakage

The invention discloses a fluidization blast cap used for preventing slag leakage, which comprises a cap head, and an air inlet pipe arranged in a penetrating mode and fixed in the cap head, wherein an opening and closing component is fixedly connected in the air inlet pipe to be used for opening and closing the air inlet pipe. When air flows enter the cap head from the air inlet pipe, the starting and closing component is propped to be opened; and when the air flows enter the air inlet pipe from the head cap, the starting and closing component is compacted and blocked by the air flows. According to the fluidization blast cap used for slag leakage, an opening component is arranged in the air inlet pipe, and when a returned air flow is generated, the opening component can be used for automatically cutting off the returned air flow. The fluidization blast cap disclosed by the invention can effectively prevent slag leakage of the fluidization blast cap.