Cast iron spheroidizing treatment system

Abstract

The invention discloses a cast iron spheroidizing treatment system which comprises a spheroidizing ladle and a feeding mechanism for feeding a spheroidizing agent to the bottom of an inner cavity of the spheroidizing ladle. A lining of the spheroidizing ladle comprises a reinforcing part formed by mechanical pressing, the reinforcing part is at least arranged at the bottom of the inner cavity of aspheroidizing bag body, and a viscous filling layer is arranged between the reinforcing part and the side wall of the spheroidizing ladle body. The feeding mechanism comprises a containing part for containing the spheroidizing agent, a hoisting part for vertically hoisting the containing part and a driving part for driving the containing part to enter the bottom of the spheroidizing ladle downwards and leave the spheroidizing ladle upwards; and the containing part is provided with a release valve plate capable of being opened to release the spheroidizing agent after entering the bottom of thespheroidizing ladle. The lining of the spheroidizing ladle is prefabricated, so that the bottom of the ladle lining is more compact, the strength of the bottom of the ladle lining is greatly improved, and the time spent by replacing a new ladle lining is saved. Through the arrangement of the feeding mechanism, the spheroidizing agent makes sufficient contact with molten iron for reaction, the absorption rate of the spheroidizing agent is improved, the spheroidizing effect is stable, and the spheroidizing quality is high.

Description

technical field [0001] The invention relates to the technical field of metal casting, in particular to a cast iron spheroidizing treatment system. Background technique [0002] Spheroidizing treatment is a process of treating alloy liquid during casting of cast iron to obtain spherical graphite, thereby improving the mechanical properties of cast iron. This cast iron is called nodular cast iron. In the foundry production process, the molten iron is usually spheroidized by a spheroidizing ladle, that is, a nodulizing agent is placed at the bottom of the nodulizing ladle, and the nodulizing agent is covered, and then poured into the molten iron to obtain fine and evenly distributed spheroids. cast iron. [0003] The inner wall of the spheroidized inclusion structure is provided with a layer of lining as a refractory layer to isolate the high-temperature molten iron from direct contact with the spheroidized inclusion and improve the high temperature resistance of the spheroidi...

AI Technical Summary

Problems solved by technology

After the molten iron is poured, the molten iron and a large amount of nodularizing agent first react violently at the bottom of the cladding substrate, which may easily cause the refractory layer at the bottom to crack or fall off

Moreover, the oxide slag produced during the spheroidization reaction will adhere to the spheroidization chamber, making the volume of the spheroidization chamber smaller and smaller, especially at the bottom of the spheroidization chamber. It must be cleaned after continuous production of more than ten furnaces. , in the cleaning process, due to the intervention of external force, it will cause damage to the lining

Therefore, due to the cracking or falling off of the bottom of the bag, the service life of the existing spheroidizing bag is relatively short, and it is generally necessary to replace the new bag lining in about three days, delaying production

[0004] In addition, in the casting production process, there are many forms of covering the nodulizer in the pouring method nodularizing bag, some are covered with straw ash, some are covered with straw ash, some are covered with iron filings, and some are covered with ash. Covering with iron plate, because of the poor covering effect of the above methods, when the molten iron enters the spheroidizing ladle, it is easy to make the spheroidizing agent melt and float earlier, resulting in that the spheroidizing agent cannot be fully absorbed, the absorption rate is low, and the spheroidizing effect is not good. Stable, affecting the quality of spheroidization and production and processing efficiency

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