Titanium calcium aluminate castable for ladle or foundry ladle and preparation method thereof

Abstract

The invention discloses a titanium calcium aluminate castable for ladle or foundry ladle. The titanium calcium aluminate castable for ladle or foundry ladle comprises (by weight): 60-80% of titanium calcium aluminate, 10-25% of high alumina bauxite clinker, 2-6% of calcium aluminate cement, 2-8% of alumina micro-powder and 3-6% of silica micropowder. In the preparation, polypropylene fiber and a water reducer are added, wherein the polypropylene fiber accounts for 0.01-0.04% of total weight of the raw materials; and the water reducer accounts for 0.1-0.5% of weight of the raw materials. by adding the alumina micro-powder and silica micropowder, volume stability of the ladle or foundry ladle can be maintained at the use temperature, and damage degree and potential safety hazard of the product are effectively reduced. By using calcium aluminate cement and silica micropowder as a compound binder, the product has good workability and medium and high temperature strength, service life is long, repair frequency is reduced, and smooth production of ladle is guaranteed. By using titanium calcium aluminate in quantity, volume stability of the titanium calcium aluminate castable at medium and high temperature is good, and the strength is high.

Description

technical field [0001] The invention relates to a calcium aluminate titanate castable for ladles or iron ladles and a preparation method thereof. Background technique [0002] In recent years, with the development of out-of-furnace refining and continuous casting technology, the ladle is not only a container for molten steel, but has become a molten steel refining equipment. As the temperature of steel increases, the use environment of refractory materials for ladles is becoming more and more harsh and the requirements are getting higher and higher. [0003] At present, domestic steel (iron) bales are generally formed by pouring the slab castable as a whole, or adopt the mode of slab brick masonry and back seam filling with slat castables. The castables along the package are generally aluminum-magnesium castables or high-alumina castables. When aluminum-magnesium castables are used, volume expansion will occur due to the formation of a certain amount of aluminum-magnesium ...

AI Technical Summary

Problems solved by technology

When aluminum-magnesium castables are used, volume expansion will occur due to the formation of a certain amount of aluminum-magnesium spinel at the service temperature, and the strength will decrease, which will cause damage to the castable during slag removal / slagging; in addition, in During construction in summer, aluminum-magnesium castables will solidify quickly and greatly shorten the construction time. In order to ensure the construction time, workers will increase the amount of water added, which will lead to lower strength of castables in the later stage

When high-alumina castables are used, the impurities contained in the high-alumina bauxite clinker, the main raw material, will produce liquid phases at high temperatures and cause shrinkage, and cracks will occur during the repeated cold and heat changes along the package, and the overall strength will decrease, resulting in faster damage

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