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Cast iron spheroidizing treatment system

A processing system and nodularizing bag technology, applied in the field of cast iron nodularizing treatment system, can solve the problems of poor coverage, nodularizing agent melting and floating, low absorption rate, etc., to reduce labor intensity, save production cost, The effect of improving the service life

Active Publication Date: 2020-06-19
HEBEI YICHEN INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Cast iron spheroidizing treatment system
  • Cast iron spheroidizing treatment system
  • Cast iron spheroidizing treatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The accommodating part is a syringe made of refractory material. Since the syringe will enter the molten iron, the melting point of the syringe material is higher than the temperature of the molten iron. Graphite or refractory brick materials can be used. The ignition point of graphite under anaerobic conditions is at least Above 3000 degrees, when the temperature rises, graphite not only does not soften but strengthens. The syringe includes an injection barrel 101 for containing the nodulizing agent and a push rod 102 capable of moving up and down in the injection barrel 101; an injection hole is opened at the bottom of the injection barrel 101, and the release valve plate is arranged on the injection barrel 101. At the bottom of the hole, there is a sealing plate 103 that is limited in the height direction, and the sealing plate 103 can be rotated by the rotating mechanism to open the injection hole; the bottom of the push rod 102 has a pushing plate that matches the i...

Embodiment 2

[0074] housing, such as Figure 9As shown, it is a shell 501 with an open bottom made of refractory material, a connecting rod 502 made of refractory material is fixed on the top of the shell 501, and the release valve plate is detachably installed on the shell 501 The fusible plate 503 at the bottom, the release valve plate is an iron plate. The driving part is fixed to the connecting rod 502 at its lifting end. Such as Figure 7 and 8 As shown, the driving part can adopt the same form as that in the first embodiment, and use a screw rod and a nut to cooperate and drive to realize the lifting of the accommodating part. The driving part can also be driven in the form of hoisting, and the hoisting is fixed on the hoisting frame.

[0075] When the spheroidizing ladle 401 is filled with molten iron, the drive unit drives the housing 501 down into the bottom of the spheroidizing ladle 401. After a short time, the iron plate is melted by the molten iron, and the bottom of the s...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/10C22C33/08B22D1/00
CPCB22D1/00C21C1/105C22C33/08
Inventor 张立刚张力峰王晓谦刘建宾张磊倪腾龙崔亚克张洋王慧晓
Owner HEBEI YICHEN INDAL GROUP
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