Plate-belt temperature monitoring method during hot-rolled strip steel stream cooling process

A laminar flow cooling and hot-rolled strip technology, applied in the direction of temperature control, etc., can solve the problems that the transient temperature of the strip cannot be predicted, the model does not reflect the relationship between the strip points, and the model accuracy requirements are strict, etc., to achieve a wide range of steel types, The effect of improving monitoring accuracy and good convergence

Inactive Publication Date: 2009-06-17
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, this method is a forward estimation method, the model does not reflect the relationship between the points, and there is no feedback correction, the model accuracy is strictly required
Xie H.B etc. published "Prediction of coiling temperature on run-out table of

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  • Plate-belt temperature monitoring method during hot-rolled strip steel stream cooling process
  • Plate-belt temperature monitoring method during hot-rolled strip steel stream cooling process
  • Plate-belt temperature monitoring method during hot-rolled strip steel stream cooling process

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Embodiment Construction

[0022] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0023] This embodiment is applied to the laminar flow cooling process of hot-rolled steel strip. Such as figure 1 As shown, the laminar flow cooling equipment is divided into the main cooling area (46.8m) and the fine cooling area (15.6m). It consists of 12 groups of nozzles, and the distance between each group of nozzles is 5.2m. The temperature of strip steel after finishing rolling is about 800-920℃, cooled to 510-680℃ by cold flow cooling equipment, and finally coiled into coils by coiler. Strip parameters are as follows:

[0024] The thermal conductivity coef...

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Abstract

The invention relates to a method for monitoring the temperature of a hot rolled ribbed steel layer flow cooling process slab band in the field of metallurgical industry. The invention monitors the slab band temperature distribution at each position between an outlet of a finishing mill and a curling temperature measuring point aiming to the hot rolled ribbed steel layer flow cooling process. The invention adopts the slab band physical property parameter and the parameter of a cooling device to directly write initial predicted slab band temperature distribution of a slab band temperature model in the form of state space. According to the curling temperature of the upper surface and the lower surface of the slab band, the initial predicted value is corrected by adopting the method for expanding Kallman filtering so as to obtain the slab band temperature monitoring value. The method has convenient application, is suitable for various steel grades, improves the monitoring accuracy of the slab band temperature distribution and reduces the requirement on the model accuracy.

Description

technical field [0001] The invention relates to a temperature monitoring method in the technical field of metallurgical industry, in particular to a strip temperature monitoring method in the laminar flow cooling process of hot-rolled strip steel. Background technique [0002] With the continuous emergence of new materials, the automotive industry needs lighter steel plates that can maintain a certain level of strength and toughness. In order to improve the performance of steel, in addition to adding alloys, the controlled cooling technology after rolling plays a vital role in the performance of steel. Therefore, a highly flexible and high-precision control method is urgently needed in the laminar cooling process of hot rolling. In order to obtain higher control accuracy and overcome the disturbance of the cooling process, it is first necessary to know the strip temperature in the cooling zone. However, in the laminar cooling process of hot-rolled strip, due to the existen...

Claims

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Application Information

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IPC IPC(8): B21B37/74
Inventor 李少远郑毅李柠席裕庚
Owner SHANGHAI JIAO TONG UNIV
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