Production and application of vermiculizer

Abstract

The invention relates to a vermicularizing treatment method for vermiculizer for producing vermicular graphite cast irons. The vermicularizing treatment method is characterized in that vermiculizer containing 15-50% of RE, the weight of which accounts for 15-40% of the total weight of various alloys, is filled in the internal middle of a square steel tube, and a molten iron finishing agent containing 12-16% of Mg, 54-65% of Si and 3% of Ca is filled in the two ends adjacent to the internal middle; the vermicularizing treatment method comprises the following steps of: firstly mechanically stirring and uniformly mixing powdery a molten iron treating agent material which is needed in the square steel tube and the weight of which accounts for 50% of the total weight of a molten iron treating agent alloy, pressing the powdery molten iron treating agent material to one end of the square steel tube by adopting a press machine, placing a vermiculizer massive block accounting for 15-40% of the total weight of the various alloys in the square steel tube on the powdery molten iron treating agent pressed by the press machine in the square steel tube, placing the rest of powdery molten iron treating agent with the weight accounting for 15-40% of the total weight in a square steel tube in a remained space of the upper end of the square steel tube, and pressing the powdery molten iron treating agent by using the press machine, thereby obtaining a whole body with the pressed iron treating agent containing no RE at the two ends and the vermiculizer in the middle part; and carrying out the vermicularizing treatment on the whole body in combination with a vermicularizing treatment device by adopting a pouring ladle method.

Description

technical field [0001] The invention relates to a production method and application of a vermicular agent. Specifically, there are magnesium-silicon spheroidizers at the openings of the two ends of the square steel pipe with openings at both ends, and an integral vermicularizing agent of low-magnesium rare earth ferrosilicon in the middle. Vermicularization treatment carried out in-house. Background technique [0002] The research and application of cast iron containing vermicular graphite as a formal engineering material began in my country at the same time as foreign countries, and its industrial application was earlier than that of foreign countries. The research, production and application of vermicular iron are at the international advanced level. Most factories use cupola smelting without pretreatment to produce vermicular iron parts. In order to ensure the creep rate of vermicular iron parts, the RE content in the vermicularizing agent is relatively high, and some ha...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of vermicular agent, cooperate with the vermicular treatment device to solve the problem of low absorption rate of effective elements such as RE in the process of vermicular treatment by flushing into the bag, reduce the amount of RE, and realize accurate control of vermicular reaction time , Stably improve product quality, reduce production costs, give full play to and utilize resources