Converter operation monitoring method and converter operating method

Abstract

In the decarburization refining of molten pig iron by top-blowing an oxidizing gas through a top blowing lance, the fluctuation of molten metal is suppressed to prevent the occurrence of flying / scattering of the molten metal and the reduction in iron yield caused by the flying / scattering of the molten metal. A converter operation monitoring method according to the present invention comprises, in the decarburization refining of molten pig iron (5) in a converter (2) by blowing an oxidizing gas onto the molten pig iron through a top blowing lance (3) or blowing the oxidizing gas onto the molten pig iron through the top blowing lance while blowing the oxidizing gas or an inert gas into the molten pig iron through a bottom blowing tuyere (4), measuring the vibration of the converter and monitoring the frequency of the vibration of the converter, which can be determined by subjecting the measurement value to a frequency analysis, during the decarburization refining.

Description

technical field [0001] The present invention relates to the process of blowing oxidizing gas from a top blowing lance to molten iron (molten pig iron) in a converter and producing molten steel (molten steel) from the molten iron The operation monitoring method and operation method, in detail, relate to a converter operation monitoring method and a converter operation method capable of reducing iron content by ejecting iron content and dust adhering to a furnace mouth or a furnace wall to the outside of the furnace. Background technique [0002] In the decarburization refining (decarburization refining) of the molten iron in the converter, from the viewpoint of improving the productivity of the converter, the operation of increasing the oxygen supply rate per unit time is adopted, and as a result, it is scattered outside the furnace as dust and the like. Increase in iron content, and iron content attached and / or accumulated near the furnace mouth or on the furnace wall. Thes...

AI Technical Summary

Problems solved by technology

However, with the swinging of molten iron or molten steel produced from the molten iron, the scattering of molten iron (molten metal) increases, and there is an increase in the origin of generation of dust due to the above-mentioned foam collapse, and the vicinity of the furnace mouth or the furnace wall. The possibility of increased adhesion and / or accumulation of iron on the

It should be noted that in the decarburization refining of molten iron, the molten iron is decarburized and refined to change to molten steel, but in the middle of decarburization refining, not only the molten iron and the molten steel are displayed indistinguishably, but also complicated.

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