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Component change prediction method and system for special steel type mixed casting blank

A prediction method and mixed-casting billet technology, applied in the field of iron and steel manufacturing, can solve the problem that the prediction model relies on laboratory numerical simulation calculation or water model experiment, etc., and achieve the effect of accurate starting position and ending position and accurate judgment.

Active Publication Date: 2019-09-20
LIANYUAN IRON & STEEL GROUP CO LTD +1
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Problems solved by technology

[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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  • Component change prediction method and system for special steel type mixed casting blank
  • Component change prediction method and system for special steel type mixed casting blank
  • Component change prediction method and system for special steel type mixed casting blank

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specific Embodiment

[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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Abstract

The invention belongs to the technical field of steel manufacturing, and particularly relates to a component change prediction method and system for a special steel type mixed casting blank, and particularly relates to a component change prediction method for a special steel type mixed casting blank. The method comprises the following steps of: collecting a mixed casting blank sample, and analyzing the component change of the mixed casting blank sample; acquiring the tundish residual steel quantity and the tundish steel production capacity, and fitting a mixing degree function model according to the component change, the tundish residual steel quantity and the tundish steel production capacity; acquiring the continuous casting pulling speed and the width of the mixed casting blank sample, and fitting a liquid core impact depth function model according to the component change, the continuous casting pulling speed and the width; and according to the mixing degree function model and the liquid core impact depth function model, predicting the initial position and the final position of the mixed casting blank, wherein the mixing degree function model and the liquid core impact depth function model are established without depending on laboratory digital analog calculation or water model experiments, so that the prediction accuracy is high.

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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Application Information

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IPC IPC(8): G01N33/20G01N33/202G01N21/72G06F17/10
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
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