Production method of high-quality nodulizer

Abstract

The invention discloses a production method of a high-quality overall rare-earth magnesium-silicon-iron spheroidizing agent. The production method is characterized in that a first part is a rare-earth magnesium-silicon-iron spheroidizing agent of which the content of Mg is controlled to be not higher than 10%, the content of Si is controlled to be not lower than 65% and the content of RE (Rear Earth) is not higher than 2%, and the rare-earth magnesium-silicon-iron spheroidizing agent containing the ingredient realizes a magnesium light-free status during both melting and pouring, thus generation of magnesium oxide is greatly reduced; a second part is a combined type melting tank for pouring alloy liquid of the ingredient rare-earth magnesium-silicon-iron spheroidizing agent. A new process overcomes the problems of ingredient segregation and high magnesium oxide content of a conventional rare-earth magnesium-silicon-iron spheroidizing agent; the magnesium oxide content of the high-quality overall rare-earth magnesium-silicon-iron spheroidizing agent is smaller than 0.3%; the melting loss of spheroidizing agent alloy is small; the finished product rate of the high-quality overall rare-earth magnesium-silicon-iron spheroidizing agent with required weight and shape is high.

Description

technical field [0001] The present invention relates to the production method of the nodulizer used in the production of nodular cast iron, more specifically to the production method of the nodulizer with less segregation of chemical components and low oxidation and melting loss of the nodulizer during the production process. Background technique [0002] Rare earth magnesium ferrosilicon alloys are widely used as nodularizers in enterprises producing ductile iron castings. Rare earth magnesium ferrosilicon alloy nodulizer is currently the largest nodulizer at home and abroad, but in its traditional production process, it consumes a lot of energy, has large melting loss, and causes serious environmental pollution. Due to the low absorption rate of magnesium, the traditional nodulizer The amount added is larger. For a long time, technical personnel at home and abroad have made unremitting efforts to study the spheroidization treatment technology of the in-package method and ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of severe reaction, low effective element absorption rate and high magnesium oxide content in the melting process of rare earth magnesium ferrosilicon alloy, and reduce production cost and achieve energy efficiency under the premise of stabilizing and improving product quality. Recycle, reduce environmental pollution

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