Spheroidizing treatment technology by rush-in method

A treatment process and spheroidizing agent technology, which is applied in the field of spheroidizing treatment process by rushing method, can solve the problems of intensified burning of the spheroidizing agent, unsatisfactory effect, and increased labor intensity, so as to increase safety and reduce spheroidization. The effect of long time and improved working conditions

Inactive Publication Date: 2011-10-19
JIANGLING MOTORS
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  • Abstract
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Problems solved by technology

Usually there is such a problem: because the molten iron is directly washed down, the instantaneous temperature in contact with the surface of the spheroidizer is too high, which intensifies the burning loss of the spheroidizer, and easily causes spheroidization recession, resulting in the scrapping of castings
[0004] However, the perlite covering agent covering method of the traditional technology directly covers or adds covering nodulizers and inoculants such as nodular iron filings and silicon steel sheets. On the one hand, manually poking the bagging pit increases the labor intensity; on the other hand, the reaction lags behind, and the poking process may explode violently, aggravating the burning loss of the nodulizer and the splashing of molten iron, and it is dangerous to a certain extent, and the effect is not very good. ideal

Method used

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  • Spheroidizing treatment technology by rush-in method
  • Spheroidizing treatment technology by rush-in method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment one: see figure 1 .

[0027] A kind of spheroidization process of flushing, comprising the following steps,

[0028] (1) Sequentially add nodulizer 2 and inoculant 3 into ladle pit 1 or dam;

[0029] (2) Cover nodulizer 2 and inoculant 3 with nodular iron plate 4;

[0030] (3) Sprinkle covering agent 5 on ball iron plate 4;

[0031] (4) Pour the molten iron into the ladle;

[0032] (5) After the spheroidization reaction is sufficient, sprinkle a layer of slag collecting agent and remove slag.

[0033] The covering agent 5 is perlite, and can also be other perlite-based covering agents.

[0034] The covering thickness of the covering agent 5 on the nodular iron plate 4 is 2 mm.

[0035] The ductile iron plate 4 is cast from remaining nodular iron molten iron, and its thickness is 8 mm. Using the remaining ductile iron to cast ductile iron plates will not introduce new impurities into the ductile iron.

[0036] In this example, the spheroidization react...

Embodiment 2

[0037] Embodiment two: the diagram is omitted. It is basically the same as the first embodiment, and the similarities will not be repeated. The only difference is that the coating thickness of the covering agent 5 on the ductile iron plate 4 is 4 mm.

[0038] The ball iron plate 4 thickness is 10mm.

[0039] In this example, the spheroidization reaction time was extended by 70%.

Embodiment 3

[0040] Embodiment three: the figure is sketched. It is basically the same as the first embodiment, and the similarities will not be repeated. The only difference is that the coating thickness of the covering agent 5 on the ductile iron plate 4 is 5 mm.

[0041] Iron plate 4 thickness is 15mm.

[0042] In this example, the spheroidization reaction time was extended by 100%.

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Abstract

The invention relates to a spheroidizing treatment technology by rush-in method, comprising the following steps: adding a nodulizer and an inoculant successively in a ladle pit or a dam; using a ductile iron plate to cover the nodulizer and the inoculant; scattering a covering agent on the ductile iron plate; dumping molten iron into the ladle; scattering a slag collecting agent after the spheroidizing reacts sufficiently, and removing the slag. By covering the nodulizer and the inoculant with the ductile iron plate and the covering agent successively, the covering agent containing perlite expands rapidly under the condition of instantaneous high-temperature to form a protective layer, so that the temperature of the spheroidizing reaction is reduced, the time of the spheroidizing reaction is prolonged and the spheroidization effect is improved.

Description

technical field [0001] The invention relates to the technical field of spheroidizing treatment of nodular cast iron, and in particular relates to a technique for spheroidizing treatment by punching method. Background technique [0002] Ductile iron has rapidly developed into a cast iron material that is second only to gray cast iron and is widely used. The spheroidizing process is one of the important steps in the production of nodular iron. Due to the different methods in the spheroidizing process, the absorption rate of the molten iron to the nodularizing agent is different, which directly affects the nodularizing effect and the quality of the nodular iron. The key to control the spheroidization reaction is the absorption rate of the spheroidizer, and one of the factors that has the greatest impact on the absorption rate is the spheroidization reaction time. The effect is poor; if the spheroidizing temperature is appropriate, the reaction is stable, the time is long, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/10
Inventor 徐万里熊萍万修根王瑞平刘贵生张强熊贵根谌军陈凯
Owner JIANGLING MOTORS
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