Slag nonpollution deoxygenation method capable of regulating anode oxygen partial pressure and device thereof

Abstract

The invention relates to a pollution-free molten slag deoxidization method capable of adjusting anode oxygen partial pressure and a device thereof, and belongs to the technical field of metallurgical refining process. In the method, molten steel or molten metal is deoxidized and purified by the special device. In the method, the molten slag is taken as electrolyte, a deaeration cavity electrode inserted into the molten slag is taken as an anode, and the molten steel or the molten metal is taken as a cathode; the deaeration electrode is provided with an electrode cavity and is communicated with a vacuum chamber by a conduit; an applied DC power supply exerts direct current impulse voltage so that an electric field is formed between the molten steel or the molten metal and an oxygen electrode of the molten slag, and the conduction of oxygen ions in a molten slag system and mass transfer of dissolved oxygen in the molten steel are controlled by controlling a current value and a voltage value of the DC power supply as well as components of the molten slag. The oxygen is diffused from the molten slag to the electrode cavity and discharged by an air exhaust system by controlling the oxygen partial pressure of the electrode cavity.

Description

technical field [0001] The invention relates to a pollution-free deoxidation method and device for molten slag with adjustable anode oxygen partial pressure, and belongs to the technical field of metallurgical refining technology. Background technique [0002] With the development of modern science and technology, the requirements for the quality of various metals and steels are getting higher and higher. Oxygen in steel is a harmful element, which will adversely affect the quality of steel. In order to remove the oxygen in the steel, the traditional deoxidation method is mainly based on the direct deoxidation of the deoxidizer. create pollution. As people's requirements for the cleanliness of steel are getting higher and higher, the traditional deoxidation method can no longer meet people's requirements. Reducing or even avoiding the pollution of deoxidation products to molten steel is an important way to reduce the total oxygen content in steel and improve the surface a...

AI Technical Summary

Problems solved by technology

Metal materials are easily corroded by slag, and high-temperature-resistant metals are expensive

Carbon anode itself has inherent disadvantages: constant consumption, frequent replacement, polluting the environment, etc.

Only inert anodes can be used, and oxygen is precipitated at the inert anode, and the surface of the electrode is covered by a large amount of anode gas, and a layer of gas mesh is accumulated between the anode and the slag, which hinders the wetting of the slag to the electrode and blocks the current channel. The formation of anode effect restricts the further improvement of deoxidation efficiency

Images