wanhaorefractory

  (1) The tundish dry material composition and distribution operation have an impact on the density and uniformity of the working layer of the tundish; the standard distribution operation can reduce the looseness and segregation of the dry material in the tundish . (2) Optimize the process, reduce the vibration time of the tundish from 15 minutes to 8 minutes, and extend the baking time from the original 2 hours to 3.5 hours, which improves the strength of the magnesium dry material during use. (3) Through the design of the special nozzle foam plug for repairing the tundish, the use effect of the upper nozzle of the tundish is guaranteed, and the problems such as steel slag blocking the eye caused by the irregular shape of the nozzle are solved. Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, blast furnace, AOD furnace, IF furnace, etc. Article Source: Summary of

  1. The situation before switching Due to the history and production status and other reasons, the tundish working layer used in the production of Tanggang No. 2 Steel mill is mostly silicon plate, only one continuous casting machine uses part of magnesium coating, the average life of the tundish is only 6 ~ 7h, the operation rate of the continuous casting machine is only about 70%. Because the life of tundish is too low, and the amount of head and tail billet and tundish is too large, the consumption of steel material is too high, the average consumption of steel material is about 12kg. Moreover, due to the poor sintering effect and sintering strength of the silicon plate, the pollution of the silicon plate to the molten steel is too large, which can not meet the requirements of casting purity. 2. Use specific measures and effects (1) Improve and optimize the materials of the intermediate working layer Tundish working layer is the key point of tundish. When molten s

  1. Loose Wall The looseness of the tundish wall is mainly reflected in the contact position between the tundish wall and the bottom of the tundish. The looseness of the wall is manifested in two forms: one is that it extends longitudinally from the position of the wall to form an irregular surface; The other is that the elongated powder falls down to form a "slit shape". There are two reasons for the looseness: one is that the binder volatilizes, resulting in a decrease in the overall bonding strength, especially the outermost one; the other is that the fine powder containing resin does not wrap the particles, which eventually causes slag to fall off easily. The low-temperature baking strength and medium-temperature strength of the dry-type material can be better improved by mixing boron glass powder and phenolic resin in the magnesium dry-type material . Based on the site conditions, it was found that the reasons for the low quality of the tundish repair wer