Deoxidant body

Abstract

The present invention relates to one kind of deoxidant body. The deoxidant body includes a casing with opening, an opening plug and stuffing inside the casing. The casing consists of mixed conductor of stable zirconia mixture 80-85 wt% and high temperature resisting metal 15-20 wt%, the said stable zirconia mixture consists of zirconia 92-98 wt% and magnesia and / or yttrium oxide 2-8 wt%; and the high temperature resisting metal is metal Mo or metal Ni. The casing of the deoxidant body has concurrent oxygen ion conduction and electronic conduction of the mixed conductor as well as excellent thermal vibration resisting performance without burst during deoxidation and pollution.

Description

technical field [0001] The invention relates to a deoxidizer used in a deoxidation method during steelmaking. Background technique [0002] Oxygen in steel is a harmful element, and it must be deoxidized in the later stage of steelmaking. Chinese Invention Patent Application Publication CN1187542A discloses a pollution-free deoxidizer, which is composed of a fixed electrolyte shell, a deoxidizer wrapped by it, and a high-temperature electronically conductive material that seals the charging opening on the solid electrolyte shell. When the positive and negative charges accumulated on the outer and inner surfaces of the solid electrolyte are continuously neutralized by the high-temperature electronically conductive material, the deoxidation process can continue until a thermodynamic equilibrium is reached. However, the above-mentioned invention uses stabilized zirconia as the material of the deoxidizer shell, and because the zirconia material with higher stability has a small...

AI Technical Summary

Problems solved by technology

However, the above-mentioned invention uses stabilized zirconia as the shell material of the deoxidizer. Due to the low thermal conductivity and large thermal expansion coefficient of the zirconia material with high stability, its thermal shock resistance is poor.

When zirconia is used as the shell of the deoxidizer, pollution-free deoxidation often fails due to the bursting of the shell of the deoxidizer during the deoxidation process