Jet continuous spheroidizing process

Abstract

The invention relates to a jet continuous spheroidizing process which comprises the following steps of: forming a mixed jet source of spheroidizing agent powder and reducing or inert gas by using a jet device, and flushing with flowing liquid iron to ensure that magnesium in the spheroidizing agent is rapidly dissolved in the liquid iron and no enrichment area or depletion area can be formed; meanwhile, forming a protective film on the surface of the spheroidizing agent by using the inert gas to prevent magnesium in the spheroidizing agent from combusting and floating on the liquid iron so as to realize the continuous spheroidizing and the fully spheroidizing of the liquid iron. The spheroidizing process for realizing the continuous spheroidizing of the liquid iron not only can realize a continuous reaction between magnesium in the spheroidizing agent and the liquid iron when spheroidal cast iron is produced, but also can prevent magnesium in the spheroidizing agent from combusting and prevent magnesium from floating on the liquid iron; and magnesium can be rapidly dissolved in the liquid iron so that no enrichment area or depletion area can be formed. The spheroidizing process has the advantages of convenient operation and reliable performance, and the prepared spheroidal cast iron has good quality, high spheroidizing grade and no decaying of spheroidization.

Description

technical field [0001] The invention relates to a production process of nodular cast iron, in particular to a spheroidization process for realizing continuous spheroidization of molten iron during the production process of nodular cast iron. Background technique [0002] Ductile cast iron is a cast iron material with excellent mechanical properties, but in order to obtain ductile cast iron in the molten iron smelting process, a nodularizing agent must be added to the molten iron to spheroidize the graphite in the molten iron. The higher the level of spheroidization, that is, the more the number of spheroidal graphite, the more uniform the size and shape, the better the performance of the nodular cast iron. In production, due to the influence of various factors, there are phenomena such as low spheroidization level of nodular cast iron, uneven spheroidization, instability, and spheroidization decline. The main factors hindering the spheroidization of graphite in molten iron ...

AI Technical Summary

Problems solved by technology

In production, due to the influence of various factors, there are phenomena such as low nodularization level of nodular cast iron, uneven nodularization, instability, nodularization decline, etc.

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