Method for producing nodulizing agent

Abstract

A manufacturing method of nodulizers with small chemical composition segregation and low oxidation loss is characterized in that the first part is an extruded magnesium treatment device which reacts under the condition of being filled with inert gases or carbon dioxide, thus effectively controlling the reaction time of the magnesium metal and superalloy liquid and conducing to the magnesium metal to form Mg2Si; the second part is a combined molten pool for pouring nodulizer alloy liquid; the combined molten pool and the pouring basin can ensure that the nodulizer alloy liquid rapidly fills the die cavity of the molten pool in a possibly short time and that the nodulizer alloy liquid of the pouring type die cavity can congeal at the same time. The alloy liquid is evenly cooled in a closed die cavity, thereby overcoming the oxidation and segregation of the upper surface of the nodulizer alloy liquid. The product quality is stable and the manufacturing cost is obviously lower than that of the nodulizer produced by the secondary smelting and remelting method. The method cancels the secondary smelting process of the nodulizers of rare earth-Mg-Si-Fe, achieves the purpose of energy-saving and environment protection and eliminates environmental pollution.

Description

technical field [0001] The invention relates to a production method of a nodulizer with less segregation of chemical components and low oxidation loss. Background technique [0002] At present, the methods of producing rare earth magnesium ferrosilicon nodulizers are mainly the secondary smelting remelting method and the alloy hydraulic pressure adding magnesium method. The production of nodulizer by traditional secondary smelting and remelting method not only has high cost, but also has more magnesium burning loss and high magnesium oxide content in the nodulizer. In the process of the disclosed alloy hydraulic pressure adding magnesium method, except for the top surface, other parts of the pressed magnesium ingot are completely exposed and can directly contact with the alloy liquid. In addition, the distance between the exposed magnesium ingot and the alloy liquid surface The distance is short, which is not conducive to being absorbed by the alloy liquid; adding magnesium...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of severe reaction and low absorption rate of effective elements in the melting process of rare earth magnesium silicon ferrosilicon nodulizer, stabilize and improve product quality, reduce production cost and achieve energy recycling, reduce environmental pollution

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