Electromagnetic stirring water-cooled mold and method for pouring steel ingot

Abstract

The invention discloses an electromagnetic stirring water-cooled mold and a method for pouring a steel ingot, belonging to the field of steel and iron smelting. The electromagnetic stirring water-cooled mold consists of a base plate, an auxiliary plate, a mold body and a heat preservation cap, wherein the heat preservation cap is embedded and inserted into an upper port of the mold body; an annular gap of the upper port of the heat preservation cap is filled with filler sand; a heat insulating plate of the heat preservation cap is provided with a reinforcing hole; a cooling water jacket is arranged along the circumference of the mold body; the gap of the cavity of the jacket is increasingly expanded from bottom to top; and an electromagnetic stirrer is arranged along the circumference of the mold body. The method for pouring the steel ingot of the electromagnetic stirring water-cooled mold comprises the following steps of: filling casting powder at the bottom of the mold; opening a cooling water system; controlling pouring speed of molten steel of the ingot body to be (10-50) cm / min; when the liquid level rises to over 2 / 3 of the height, turning on the electromagnetic stirrer; and when the liquid level rises to the space above the reinforcing hole and below a hanger structure, stopping pouring. By using the device, the electromagnetic stirrer is turned on during pouring and crystallization of the molten steel, and the molten steel is dynamically crystallized into solid. Compared with the original technology, the equiaxed crystal ratio of the steel ingot is further improved, the stirring strength and the micro-adjustment stirring method are properly set according to different steel types, and an ideal equiaxed crystal ratio can be achieved; and a finished product of the steel ingot is uniform in composition and the grain is refined, so that the quality of the steel ingot is greatly improved.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, in particular to an electromagnetic stirring water-cooled mold and a method for pouring steel ingots. Background technique [0002] In the new steel ingot water-cooled pouring mold and method with the application number 201210180527.8, the molten steel "statically" crystallizes into a solid in the mold body (cooling in the mold body for 10-15 minutes and moving into a slow cooling hood to cool), the crystallization method of the steel ingot makes The equiaxed grain rate of the steel ingot is low, and the center looseness and deflection are unavoidable. The quality of this steel ingot cannot be compared with the electroslag remelted steel ingot. Contents of the invention [0003] In view of the above problems, the present invention provides a method for electromagnetically stirring water-cooled molds and pouring steel ingots, allowing the steel ingots to crystallize in a "moving" state, se...

AI Technical Summary

Problems solved by technology

[0002] In the new steel ingot water-cooled pouring mold and method with the application number 201210180527.8, the molten steel "statically" crystallizes into a solid in the mold body (cooling in the mold body for 10-15 minutes and moving into a slow cooling hood to cool), the crystallization method of the steel ingot makes The equiaxed grain rate of the steel ingot is low, and the center looseness and deflection are unavoidable. The quality of this steel ingot cannot be compared with the electroslag remelted steel ingot

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