Steel ingot feeder head induction heating and electromagnetic stirring device

Abstract

Disclosed is an induction heating and electromagnetic stirring device for a riser head of a steel ingot, which can be used for the heating, heat insulation and electromagnetic stirring of a riser head part of a ingot made of ferrous and nonferrous metal material. In the device, induction coils (5a, 5b, 5c) are vertically placed outside a riser head insulating sleeve (2) of a steel ingot, and are connected to a power cabinet (7) via water cooling cables, and magnetic yokes (10) are uniformly distributed outside the induction coils (5a, 5b, 5c) in a circumferential direction. After power on, a magnetic field is formed around the riser head of the steel ingot, and induction heating is conducted on a molten steel at the riser head, so as to compensate for the heat loss of the riser head in a steel ingot freezing process; and at the same time, a metal melt generates the effect of electromagnetic stirring under the action of the magnetic field, so as to form the circulation in which the molten metal at the central part of the riser head of the steel ingot moves upwards, and the molten metal at the side part of the riser head of the steel ingot moves downwards, thereby being beneficial in eliminating gas and impurities in the melt.

Description

technical field [0001] The invention relates to metallurgy and machinery manufacturing, specifically a device suitable for induction heating and electromagnetic stirring of steel ingot risers in the production of large steel ingots. By adjusting the electric power input to the electromagnetic induction coil, the riser of steel ingots of different sizes Induction heating and electromagnetic stirring are carried out on the molten metal at the mouth to reduce the size of the riser and improve the purity of the ingot body. Background technique [0002] With the development of my country's heavy equipment, metallurgy, thermal power, and nuclear power, the quality requirements for large forgings are becoming more and more stringent. Large steel ingots are used as raw materials for forgings, and their quality directly affects and determines the quality of forgings. High-quality development, in order to produce high-quality large steel ingots, we must first solve casting defects such...

AI Technical Summary

Problems solved by technology

The scope of application of this patent is not for the production process of steel ingots, and it is not suitable for ingot casting occasions. This patent uses a single-phase winding coil to inductively heat the billet riser. During the induction heating process, a magnetic field will be generated around the coil. Under the action of the magnetic field, the center The molten metal in the part is squeezed and flows upwards and downwards, forming a segmented circulation. The downward liquid flow will not only hinder the floating of inclusions, but also easily reintroduce the floating inclusions into the ingot body, reducing the steel ingot. the purity of

At the same time, it should also be noted that the intermediate frequency electric heating device used in this patent is set outside the riser, and there is a phenomenon of magnetic flux leakage, which reduces the efficiency of induction heating, and when the divergent magnetic force lines pass through the iron mold, it will inductively heat the iron mold, reducing the cooling of the iron mold. ability

Images