Hot ladle spheroidizing process

Abstract

The invention discloses a hot ladle spheroidizing process. A ladle is scalded once by base iron before tapping to be in a hot state before being buried; in ladle burning, an operator pours components including a spheroidizing agent, ferrosilicon granules and scrap iron to a dyke in the ladle in sequence outside the ladle, and shakes out and tamps the components layer by layer; a prefabricated base iron casting iron cover plate is placed on a tamping layer by using lifting equipment; and finally, molten iron is filled into the ladle to finish the spheroidizing. The spheroidizing process can reduce the temperature difference between molten iron and the ladle in spheroidizing, and avoids the too high loss of the temperature of the molten iron; the temperature of the molten iron after being spheroidized can reach 1,400 to 1,480 DEG C; the operator is not required to enter into the ladle, the cover pressing operation is finished by the lifting equipment outside the ladle, so that the risk of the high temperature operation can be reduced; the base iron casting iron cover plate replaces a perlite layer, so that the slag formation problem, caused by the use of the perlite layer, is avoided; and as the spheroidizing detonation time can be delayed through adjusting the thickness of the cover plate, the spheroidizing reaction is guaranteed to be stable.

Description

technical field [0001] The invention relates to a molten iron spheroidizing process, in particular to a spheroidizing process of preheating a ladle by using the original molten iron and then embedding it outside the ladle. Background technique [0002] At present, most enterprises producing ductile iron castings adopt the nodularization process of building dams in ladles, covering nodulizers with ferrosilicon particles and perlite and other auxiliary materials, and rushing into them. During the spheroidization process, due to the continuous rotation of the furnace body and the constant change of the drop point of the molten iron, the covered ferrosilicon particles, steel shavings and perlite have a low density, which is easy to float and melt too quickly, resulting in premature spheroidization reaction. Poor spheroidization and other situations occur. In addition, when performing spheroidizing treatment on smaller castings, due to the small molten iron ladle and the small a...

AI Technical Summary

Problems solved by technology

During the spheroidization process, due to the continuous rotation of the furnace body and the constant change of the drop point of the molten iron, the covered ferrosilicon particles, steel shavings and perlite have a low density, which is easy to float and melt too quickly, resulting in premature spheroidization reaction. Poor spheroidization, etc.

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