Long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick

A powder-bottom-injecting converter comprising:

• a converter body;
• a detection system configured to detect an air flow and issue an erosion warning signal;
• and
• a plurality of independently removable converter bottoms, a first converter bottom of the plurality of the independently removable converter bottoms is assembled on the converter body, each of the plurality of the independently removable converter bottoms comprises:
• a first group of purging base bricks, wherein each of the purging base bricks in the first group comprises a through hole, and
• a plurality of bottom purging/powder injection bricks each installed in a corresponding through hole, wherein each of the bottom purging/powder injection bricks comprises:
• a powder transport pipe, configured for purging/powder injection when steelmaking;
• an annular gap pipe, configured for ventilating;
• and
• a plurality of capillary metal tubes buried inside each of the bottom purging/powder injection bricks, with respective upper ends of the capillary metal tubes buried at different height positions inside each of the bottom purging/powder injection bricks and blocked by each of the bottom purging/powder injection bricks, and respective lower ends of the capillary metal tubes connected to a gas source;
• and when each of the bottom purging/powder injection bricks is eroded to a height where the respective upper ends of the capillary metal tubes are located, the capillary metal tubes are exposed from a blocked state to an unblocked state, and an air flow inside the capillary metal tubes is detected by the detection system and an erosion warning signal is issued by the detection system in response to the detected air flow inside the capillary metal tubes.