Method for determining phosphorus content in steel

EP4112750B1Active Publication Date: 2024-12-25VOESTALPINE STAHL GMBH
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Patent Information

Application Number
EP2021182730
Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-06-30
Publication Date
2024-12-25
Estimated Expiration
2041-06-30

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Abstract

The invention relates to a method for determining the phosphorus content in a steel bath during the LD process, wherein the bath temperature and the phosphorus content are measured after and / or during the oxygen injection process, characterized in that the phosphorus concentration profile in the steel is determined by analyzing at least the CO and CO2 content in the exhaust gas and the exhaust gas flow rate, wherein the phosphorus content is determined from the smoothed carbon burn-off, the measured temperature of the melt, the amount of phosphorus in the converter from the raw materials used at the beginning of the blowing process, the amount of slag used, and the basicity of the slag, wherein the calculation is carried out according to the formula P=fdCdt,T,Psum,Sl,Bas,… where: [P] ... concentration of phosphorus in the steel, dCdt ... carbon burn-off, T ... temperature of the melt, Psum ... amount of phosphorus in the converter, Sl ... amount of slag, Bas ... basicity of the slag.
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Citation Information

Patent Citations

  • Process for determining the end of blowing during the refining of a steel melt in a converter

    AT406587B

  • A method for dynamically detecting the manganese, phosphorus, and sulfur content in slag during converter steelmaking.

    CN103160640B

  • Method and system for continuously predicting phosphorus content of converter bath

    CN110954670A

  • Method of dynamically detecting contents of manganese, phosphorus and sulphur of slag in converter steelmaking process

    CN103160640A

  • Method for performing online prediction and control on phosphorus content of low-carbon steel smelted by converter

    CN103361461A