A Method and System for Predicting Composition Changes of Mixed Casting Slabs of Different Steel Types
A prediction method and mixed-casting billet technology, applied in the field of steel manufacturing, can solve the problem that the prediction model depends on laboratory numerical and analog calculations or water model experiments.
Active Publication Date: 2021-11-02
LIANYUAN IRON & STEEL GROUP CO LTD +1
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[0004] In view of this, the embodiment of the present invention provides a method and system for predicting the composition change of mixed casting billets of different steel types, which can solve the problem that the current prediction model needs to rely on laboratory digital model calculation or water model experiment
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[0093] S201, mixed pouring of SAPH370 and SAPH440, SAPH370 is the molten steel from the furnace before the mixing, and SAPH440 is the molten steel from the furnace after the mixing; among them, when the molten steel ladle of SAPH440 is opened, the remaining steel in the tundish is 55.20t , the main process parameters and predicted values of the mixed casting model are shown in Table 3;
[0094] Table 3 Mixed pouring process parameter list
[0095]
[0096] S202, performing corner samples and cross-section samples on the mixed cast billet respectively;
[0097] Collect the last sample of the mixed billet from the heat before the pouring and the first sample of the billet from the heat after the pouring;
[0098] The corner samples were sampled every 1m, and the components at different sampling positions were detected by a spark direct reading spectrometer from the last sample and the first sample.
[0099] Intercept the cross-section of the head of the first mixed cast s...
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The present invention belongs to the technical field of iron and steel manufacturing, and in particular relates to a composition change prediction method and system for mixed cast billets of different steel types, in particular to a composition change prediction method for mixed cast billets of different steel types, including the following Steps: collect the mixed cast slab sample, analyze the composition change of the mixed cast slab sample; obtain the remaining steel amount of the tundish and the excess steel amount of the tundish, according to the composition change, the remaining steel amount of the tundish and the The amount of steel passed through the tundish is fitted to the mixing degree function model; the continuous casting speed and the width of the mixed billet sample are obtained, and the liquid core is fitted according to the composition change, the continuous casting speed and the width The impact depth function model; according to the mixing degree function model and the liquid core impact depth function model, the starting position and the end position of the mixed cast slab are predicted, and the established said The mixing degree function model and the liquid core impact depth function model have high prediction accuracy.
Description
technical field [0001] The invention belongs to the technical field of iron and steel manufacturing, and in particular relates to a method and system for predicting composition changes of mixed cast billets of different steel types. Background technique [0002] In the continuous casting process of different steel grades, due to the large difference in composition between the two steel grades, the mixed billets produced often do not meet the composition requirements of the former steel grade, nor do they meet the composition requirements of the latter steel grade. Under normal circumstances, mixed cast slabs need to be downgraded and re-judged, and sometimes they can only be treated as scrap steel, which reduces the metal yield. [0003] In order to judge the mixed billet and the normal billet, the data model is usually established based on the numerical model calculation or the water model experiment in the laboratory, but the establishment process of the above data model i...
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IPC IPC(8): G01N33/202G01N21/72G06F17/10
CPCG01N21/72G01N33/20G06F17/10G01N33/202
Inventor 隋亚飞徐刚军周军军刘彭谢世正刘文华赵如向利华颜海波
Owner LIANYUAN IRON & STEEL GROUP CO LTD