BLOWING CONTROL METHOD OF CONVERTER

摘要

PROBLEM TO BE SOLVED: To provide a converter blowing control method with high productivity, which estimates a spitting generation amount and controlling a lance height to suppress spitting generation in converter blowing operation.

SOLUTION: The blowing control method of a converter is characterized by including an imaging process for imaging spitting of higher than certain brightness out of spitting scattered and falling from a furnace port of the converter at an outside of the converter so as to satisfy the following expression; an analyzing process for analyzing an image of the imaged information; and a control process for controlling a lance position based on the image analysis information. 1/4*(Ls/Lt)*π/4*(d+σ)2≤X2≤(Ls/Lt)*π/4(d-σ)2: X is a length (mm) of a diameter equivalent to one pixel or one side of a square equivalent to one pixel in a visual field of a monitoring device; Ls is an average concentration of imaging of the spitting (molten iron particles); Lt is a concentration threshold of the imaging of the spitting (molten iron particles); d is an average value (mm) of a particle size of the spitting (molten iron particles); σ is a standard deviation (mm) of the particle size of the spitting (molten iron particles).

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