Method for obtaining clean metal cast ingot by removing impurities in cast ingot

Abstract

The invention discloses a method for obtaining a clean metal cast ingot by removing impurities in a cast ingot. A cast ingot with large tonnage is divided into two parts from top to bottom with a cutting method and particularly a flame cutting method, meanwhile, a V-shaped segregation object and impurity enriching region which is arranged at the middle-upper part, is not easy to treat and is hidden in the cast ingot is exposed, and the exposed V-shaped segregation object and impurity enriching region is very easy to treat with a flame blowing method or other methods, and furthermore, a clean metal resource is obtained. With the method, a casting mould is not needed to be changed too much, and electroslag remelting causing the waste of a large number of resources is also not needed, thereby the method is simple and feasible.

Description

technical field [0001] The invention belongs to the technical field of methods for obtaining clean metal ingots by metallurgical casting, and in particular relates to a method for removing impurities in ingots to obtain clean metal ingots. Background technique [0002] In the known technology, after the ordinary mold casting is completed, there is a "V"-shaped segregation and inclusion enrichment area in the center of the upper part of the generated ingot. The segregation and inclusions in this range are due to the The middle and upper part of the ingot is not easy to remove, which affects the quality of the metal produced. If the segregation and inclusions are removed, it will naturally affect the increase in metal yield. At present, most metal ingots in the world are still cast in this way, and the strength of the metal cannot be fully utilized, which brings a lot of waste of resources and energy. At present, the realization of clean metal often requires the secondary mel...

AI Technical Summary

Problems solved by technology

[0002] In the known technology, after the ordinary mold casting is completed, there is a "V"-shaped segregation and inclusion enrichment area in the center of the upper part of the generated ingot. The segregation and inclusions in this range are due to the presence of The middle and upper part of the ingot, so it is not easy to remove, which affects the quality of the formed metal. If the segregation and inclusions are removed, it will naturally affect the increase in the metal yield

At present, most metal ingots in the world are still cast in this way, and the strength of the metal cannot be fully utilized, which brings a lot of waste of resources and energy.

At present, the realization of clean metal often requires the secondary melting and refining process of electroslag remelting, which wastes a lot of energy and puts huge pressure on the environment, which does not meet the current development requirements of energy saving, emission reduction, and environmental protection; in addition, the efficiency is particularly low , especially the damage to the crystallizer caused by the electric arc is also very serious. A crystallizer mold can only smelt more than ten furnaces of steel by remelting in an electroslag furnace, and the production cost is quite high.

[0003] There is also a phenomenon that some steel mills use the cooling bottom formwork as a cooling source to implement directional solidification. In theory, it can be successful under the premise of a low liquid steel height. With the process of crystallization, the heat conduction through the bottom formwork is seriously poor, resulting in high restricted

Images