Long-service-life tundish lower nozzle excellent in abrasion resistance and flushing resistance

The invention discloses a long-service-life tundish lower nozzle excellent in abrasion resistance and flushing resistance. The long-service-life tundish lower nozzle comprises a sliding plate face body, a sliding plate face zirconium oxide core, a brick cup, a lower body, a lower body zirconium oxide core, a lower body bowl opening and a lower body molten steel channel. The sliding plate face zirconium oxide core comprises a bowl opening, a lower body zirconium oxide core clamping groove and a molten steel channel, and the sliding plate face zirconium oxide core is connected with the lower body through the lower body zirconium oxide core clamping groove. According to the long-service-life tundish lower nozzle, the sliding plate face zirconium oxide core in contact with an upper nozzle is made of a high-purity zirconium oxide material, and the sliding plate face zirconium oxide core and the lower body zirconium oxide core are connected together to form a T-shaped structure, so that theabrasion resistance and m