Method for controlling steel feeding temperature of band steel of hot strip mill
A technology of hot continuous rolling mill and control method, applied in the field of metallurgical hot rolling
Active Publication Date: 2013-06-19
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
None of them involve how to control the adjustment of the running time of the strip in the intermediate roller table by controlling the temperature of the steel entering the hot continuous rolling mill
Method used
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Embodiment
[0157] 1. The concrete strip steel kind and specification thereof that embodiment uses
[0158] Strip type
[0159] 2. Determine the length from the exit of rough rolling to the entrance of finish rolling to be 120-140m.
[0160] 3. Determine the switching point. The switching point is selected at 50m plus 10m of the maximum length of the rough rolling of the strip.
[0161] see figure 1 In 7, the speed is switched at this switching point; the length of this section is generally determined according to the longest and thinnest intermediate slab rolled by the production line plus a margin of 50-60 meters, and the general length is 120-140 meters Left and right; since the position of the switching point must be after the strip runs to the highest speed, it must be determined according to the length of the longest and thinnest intermediate slab rolled by the production line and the length of the intermediate roller table.
[0162] The switching point is generally de...
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Abstract
A method for controlling steel feeding temperature of band steel of a hot strip mill comprises the working procedures of confirming the speed switching point of the middle roller way; measuring the actual temperature of the intermediate billet of the band steel; and measuring the actual feeding steel temperature of the band steel through the rough rolling mill outlet. The method in the invention is characterized by confirming the speed switching point of the roller way according to the length from the rough rolling outlet to the finish rolling inlet; selecting different running speeds of the middle roller way according to different device commissioning solutions; confirming the steel feeding target temperature (experience data) required by different steel types; calculating and comparing the actual steel feeding temperature; obtaining the operation time of the band steel in normal condition by pre-calculating the temperature in the operation process of the band steel; confirming the operation speed of the band steel in the middle roller way, and switching the speed; controlling the finish rolling inlet temperature of the band steel by controlling and regulating the operation time so that the actual steel feeding temperature meets the steel feeding target temperature requirement, so as to control the steel feeding temperature of the hot strip mill.
Description
technical field [0001] The present invention relates to the field of metallurgical hot rolling. Specifically, the present invention relates to a method for controlling the temperature of strip steel in a hot tandem rolling mill. control method. Background technique [0002] In the metallurgical industry, the production of thin slab continuous casting and rolling coils includes the following process steps: [0003] Continuous casting slab - casting slab heating - billet descaling - rough rolling process - finishing rolling process - strip laminar cooling process - coiling. [0004] The strip rolled out of the finishing mill is cooled by the strip laminar flow cooling system on the output roller table to cool the hot-rolled strip from the final rolling temperature to the specified coiling temperature. The cooling method of strip steel and the amount of cooling water are calculated, set and controlled by computer according to different steel types, specifications, final rolli...
Claims
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IPC IPC(8): B21B37/74
Inventor 徐欣磊荣鸿伟高志玲王军
Owner BAOSHAN IRON & STEEL CO LTD