Ingot mold dead head thermal insulation device

Abstract

The invention provides an ingot mold dead head thermal insulation device. The ingot mold dead head thermal insulation device aims to restrain heat transmission of the lateral wall of a dead head to reduce lateral heat dissipation of the ingot mold dead head, achieve sequential solidification and improve the steel ingot yield and the ingot casting quality. The thermal insulation device comprises a heavy thermal insulation material layer, hollow air chambers, partition plates, a light thermal insulation material layer and reinforcing ribs. The ingot mold dead head thermal insulation device can obviously reduce the capacity of heat transmission and obviously improve the thermal insulation performance of the thermal insulation dead head. Compared with solid thermal insulation materials, the ingot mold dead head thermal insulation device can reduce the capacity of heat transmission of the lateral wall by more than 50% and achieve the purposes of improving liquid supplement effect of the dead head, reducing the ratio of the volume of the dead head and the volume of the ingot mold and improving ingot mold casting quality.

Description

technical field [0001] The invention relates to a mold casting device in steelmaking production, in particular to a steel ingot mold riser heat preservation device. Background technique [0002] Steel ingots have defects such as shrinkage cavities and shrinkage porosity due to solidification and shrinkage. Usually, an insulation riser is installed on the upper part of the steel ingot, and the molten steel in the insulation riser feeds the steel ingot body to reduce the defects such as shrinkage porosity of the steel ingot body. However, the shrinkage cavity caused by the solidification and shrinkage of the steel ingot exists in the thermal insulation riser. At the same time, the inclusions floating up during the solidification process of the steel ingot also exist in the thermal insulation riser. Yield. How to reduce the volume of the insulation riser on the premise of ensuring the quality of the steel ingot body, that is, reduce the cutting rate of the steel ingot riser, a...

AI Technical Summary

Problems solved by technology

In this utility model patent, the heat transfer by air convection increases with the length of the air section, which limits the length of the air section and affects the heat preservation effect. Both theoretical calculation and experimental results show that the heat preservation effect increased by an air section is very limited; only Anti-corrosion and high-strength heavy insulation materials, while the insulation effect of heavy insulation materials is lower than that of light insulation materials, and the insulation effect is lower than that of composite material structures with heavy insulation materials on the inner wall and lightweight insulation materials on the outer wall; due to the low strength of the air section, Restricts the size of hollow riser sleeves and is therefore only suitable for small castings

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