wanhaorefractory

  Sometimes when the drain is in use, a gap is formed between the lower slide plate and the molten steel penetrates into the gap to form a clamping steel. In severe cases, it will pass through here, causing a safety accident. There may be the following reasons for ladle nozzle clamp steel: (1) During hot repair, if the spout screw sleeve is not tightened in place or expands under high temperature, there will be a gap between the spout and the spout, causing the spout to loosen. Deformation of the spigot, or poor contact between the spout and spigot, and the spigot does not provide a good fixation effect, which may also cause the spout to clamp steel or even leak. (2) It may be that the fire mud of the joint between the drain and the lower sliding plate is too thick, the bonding strength is poor, and the shrinkage during sintering is large, which causes the refractory material of the drain to move down, produce looseness, and easily cause steel clamping, or even It'...

  Ladle Nozzle Introduction: Ladle upper/lower nozzle series are developed with the newest matrix optimization technology and the theory of the most compact. They are characterized by good thermal shock resistance, strong washout resistance, steady quality and long life. One set nozzle include ladle nozzle and collector nozzle, and ladle nozzle service life can be make sure more than 8 heats. Ladle nozzle is composed of upper and lower sliding plates and 4 refractory bricks for the upper and lower nozzles. The pouring of each ladle of molten steel must pass through the upper and lower sliding plates and the upper and lower nozzles, so they are very strict. Firstly, they must have sufficient strength at high temperatures to withstand the static pressure of molten steel. Secondly, the upper and lower sliding plates are required. The sliding surface should be very smooth, flatness should be high, to ensure tight contact, to ensure that no molten steel leak...

1.Improve molten steel yield. By using tundish exchangeable nozzle, continuous casting heat number per tundish life is increased, upper nozzle open time is decreased, accordingly, remaining molten steel, wasted billet ends are decreased, thus the yield of molten steel is improved. 2.Improve billet quality. The first and last heat of one tundish life have great impact on billet quality, with the increase of continuous casting heat number, the number of fist and last heats are decreased, therefore the quality of billet is improved; 3.Stablize production schedule. Before using tundish exchangeable nozzle, the casting speed could be unstable and unpredictable because of the expand of nozzle diameter, which could lead to accident or shutdown, brings trouble to production. By using tundish exchangeable nozzle , not only such kind of trouble can be avoided, molten steel can be saved. 4.Lower labour intensity. The increase of continuous casting heat number decre...