Device for insulating side wall of directional solidified steel ingot

Abstract

The invention discloses a device for insulating a side wall of a directional solidified steel ingot. The device is characterized by comprising a water cooling base plate, an insulating material layer, a high-strength heat-resisting material layer, a heat-insulation air layer, a fire-resistant plate and a high-thermal-insulation heat-resisting material layer, wherein the water cooling base plate is arranged at the bottom of the device, the insulating material layer is covered on the surface of molten steel, the high-strength heat-resisting material layer is contacted with the molten steel and is positioned inside the device, the heat-insulation air layer is arranged in the middle of the device, the fire-resistant plate is inserted into the heat-insulation air layer, the high-thermal-insulation heat-resisting material layer is arranged at the outer side and upper surface of the device, and the whole side wall insulating device is sealed. The outer surface of the high-strength heat-resisting material layer and the inner surface of the high-thermal-insulation heat-resisting material layer are inlaid or coated with a low-blackness substance, and the surface of the fire-resistant plate is also inlaid or coated with the low blackness substance. By adopting the device disclosed by the invention, the heat transfer on the side wall can be obviously reduced, the side wall of a casting ingot is maintained to be in an adiabatic state, the formation rate of columnar crystals is improved, and the quality of a cast ingot is improved.

Description

technical field [0001] The invention relates to an ingot casting device in the steelmaking production process, in particular to a thermal insulation device for the side wall of a directionally solidified steel ingot. Background technique [0002] Nuclear power plant equipment, pressure vessels, super large ships, etc. require large steel plates to be manufactured. These steel plates not only tend to be heavy and super thick, but also have extremely strict requirements on porosity, segregation, and non-metallic inclusions, and also require good forging performance and welding performance. Ordinary steel ingots have defects such as negative segregation, ∨ segregation, ∧ segregation, porosity, and deposition cones, and the heavier the steel ingot, the more serious these segregations are, and the more difficult it is to control, so it is difficult to meet the above-mentioned stringent requirements for large steel plates. In order to improve the quality of large steel ingots pro...

AI Technical Summary

Problems solved by technology

However, high thermal insulation materials are not resistant to high temperatures and have a short service life; the heating time of heating materials is short and pollutes molten steel, adding graphite electrodes or resistance heating elements is inconvenient for practical application, and the production cost is high

Affect the application of the above method in the directional solidification ingot production process

[0005] The applicant of the present invention once filed a patent application for "directionally solidified steel ingot side wall double-layer hollow heat insulation device".

Images