Method and device for improving magnesium absorption rate in nodular cast iron spheroidizing process

Abstract

The invention provides a method and device for improving the magnesium absorption rate in a nodular cast iron spheroidizing process, and belongs to the technical field of nodular cast iron spheroidizing processes. The method includes the following steps that a, the temperature of molten iron is controlled; b, the molten iron is injected into a spheroidizing ladle; c, a spray gun is inserted into the spheroidizing ladle, and the insertion depth of the spray gun is adjusted; d, a ladle barrel and a ladle cover of the spheroidizing ladle are locked; and e, a spheroidizing agent is sprayed into the molten iron, and the spray pressure and the spray speed of the spray gun are adjusted. By means of the method for improving the magnesium absorption rate in the nodular cast iron spheroidizing process, in the spheroidizing reacting process, escape of magnesium bubbles in the molten iron is reduced, the magnesium absorption rate is increased, the magnesium waste is reduced, and the production cost is saved. The invention also provides a device for improving the magnesium absorption rate in the nodular cast iron spheroidizing process.

Description

technical field [0001] The invention belongs to the technical field of nodular cast iron spheroidization process, more specifically, relates to a method and a device for improving the magnesium absorption rate in a nodular cast iron spheroidization process. Background technique [0002] At present, in the production process of ductile iron pipes, the molten iron needs to be spheroidized before casting, so as to realize the transformation of crystal phase and structure in the centrifugal casting process. In the nodular cast iron spheroidizing process, due to the influence of temperature, pressure and other factors, when magnesium powder is poured into the molten iron, the magnesium powder escapes more from the molten iron after gasification, resulting in a lower absorption rate of magnesium, resulting in the loss of magnesium. waste and increase production costs. Contents of the invention [0003] The object of the present invention is to provide a kind of method that impr...

AI Technical Summary

Problems solved by technology

In the nodular cast iron spheroidizing process, due to the influence of temperature, pressure and other factors, when magnesium powder is poured into the molten iron, the magnesium powder escapes more from the molten iron after gasification, resulting in a lower absorption rate of magnesium, resulting in the loss of magnesium. waste, increase production cost

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