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公开(公告)号：EP3730632A1
公开(公告)日：2020-10-28
申请号：EP18893243.8
申请日：2018-11-08
发明人： ODA Nobuhiko , OKUYAMA Goro , AMANO Shota , NAKASE Kenji , TAKAHASHI Yukio , HINO Yuta , KIKUCHI Naoki , MIKI Yuji
摘要： In a method for oxygen-blowing refining of molten iron, an oxygen-containing gas as a main supply gas is supplied from an inlet side of a blowing nozzle for the oxygen-containing gas passing through an outer shell of the top-blowing lance and blown from the blowing nozzle while a control gas is jetted toward inside of the blowing nozzle for at least part of a period of the oxygen-blowing refining from a spout arranged in a side face of the nozzle at a site where the cross-sectional area of the nozzle minimum takes the minimum in the axial direction of the nozzle or a neighborhood thereof so that at least part of the spout exists in each space formed by dividing into two portions by an arbitrary plane passing through a central axis of the nozzle.
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公开(公告)号：EP3620542A1
公开(公告)日：2020-03-11
申请号：EP18823747.3
申请日：2018-06-26
发明人： TAKAHASHI Yukio , AMANO Shota , HAYASHI Ryoya , KIKUCHI Naoki , YOKOMORI Rei , KODAMA Toshifumi , KATO Kohei
摘要： In a converter in which hot metal in the converter is subjected to oxidation refining by blowing an oxidizing gas on the hot metal from a top blowing lance, a state in the converter is accurately grasped in real time to the productivity and the iron yield.
A method for monitoring the operation of the converter according to the present invention is a method for monitoring the operation of a converter 2 in which hot metal 5 is subjected to refining by blowing an oxidizing gas from a top blowing lance 3, the method including measuring the emission spectrum of a throat combustion flame 12 of the converter or the emission spectrum of a tap hole combustion flame observed through the tap hole of the converter with a spectroscopic camera 6, calculating a temporal change in emission intensity in a wavelength range of 580 to 620 nm of the emission spectrum measured, and presuming a change of a state in the converter in accordance with the calculated temporal change in emission intensity.-
公开(公告)号：EP3929312A1
公开(公告)日：2021-12-29
申请号：EP20784186.7
申请日：2020-03-24
发明人： AMANO Shota , TAKAHASHI Yukio , KASE Hiroto , KIKUCHI Naoki
摘要： The present invention is to, during decarburization refining of molten pig iron in a converter, predict the occurrence of slopping without needing a sensor to detect the slopping to be mounted inside the converter or at a position very close to the inside of the converter, and without generating a time delay.
The present invention resides in a method for predicting the slopping in the converter, the method predicting the slopping occurred during the decarburization refining in the converter in which molten steel is produced from the molten pig iron by blowing oxidizing gas to the molten pig iron in the converter from a top blowing lance, or additionally blowing oxidizing gas or inert gas from a bottom blowing tuyere to perform the decarburization refining of the molten pig iron, the method including measuring an emission spectrum of a throat combustion flame blowing out from a throat of the converter, calculating emission intensity of the measured emission spectrum at a wavelength in a range of 580 to 620 nm, and predicting the occurrence of the slopping based on a time-series change of the calculated emission intensity.
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