| 摘要 |
PURPOSE:To execute the de-phosphorization in molten steel at high accuracy by continuously measuring composition of converter exhaust gas at the time of refining steed in the converter, converting changing with passing of time to time series changing of parameter by the ARMA system and controlling the converter operational condition by comparing this with the standard pattern. CONSTITUTION:At the time of refining molten iron to steel having the aimed quality by executing de-siliconization, de-manganization, de-sulfurization, de- phosphorization and de-carburization through oxygen blowing, the contents of CO, CO2, H2, O2 in the exhaust gas and flow rate of the exhaust gas from the converter during refining operation are continuously measured. The changes with passing time of the measured values is converted to the time series changing of parameter by ARMA system and this is compared with the standard pattern to quickly and quantitatively represent the difference of the operational condition, and by controlling oxygen lance height and oxygen injecting velocity from the lance, the P content in the molten steel produced is refined as de-phosphorizing to the aimed value with high accuracy.
|
