Method for distributing and controlling tension leveler torque in bloom continuous casting dynamic soft reduction process

A control method and soft reduction technology, which is applied in the continuous casting process and the torque distribution control field of the drawing and straightening machine in the bloom continuous casting soft reduction process, which can solve the problems of uneven torque distribution equipment, large fluctuation range, and damage to the slab. and other issues, to achieve the effect of improving the maintenance cycle and service life, ensuring the implementation effect, and avoiding the bulging of the billet

Inactive Publication Date: 2011-08-24
XINGTAI IRON & STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The uneven torque distribution caused by the implementation of dynamic soft reduction not only easily causes damage to the equipment, but also causes the slab to bulge, which affects the effect of soft reduction, and even causes production accidents.
There have been literature reports on the load distribution control technology of the drawing speed of the bloom drawing and leveling machine, the purpose is to solve the above-mentioned problems, but the method adopted by this technology is the redistribution of the total load. Compared with the set pulling speed, the pulling speed is too large and the fluctuation range is large, so it is difficult to control

Method used

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  • Method for distributing and controlling tension leveler torque in bloom continuous casting dynamic soft reduction process
  • Method for distributing and controlling tension leveler torque in bloom continuous casting dynamic soft reduction process
  • Method for distributing and controlling tension leveler torque in bloom continuous casting dynamic soft reduction process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Casting machine equipment parameters: full arc bloom continuous casting machine, radius 12m, straightening section and horizontal section casting roller diameter of 450mm, casting machine metallurgical length 33.149m (liquid level to flame cutting machine origin) . The distribution of tension leveling rolls is shown in Table 1.

[0031] Table 1 The position of each roller of the tension leveling machine

[0032]

[0033] (2) The billet size is 280mm×325mm, the steel type is GCr15, and the total reduction is 10mm. The steel composition, casting temperature and casting speed are shown in Table 2.

[0034] Table 2 Steel composition, casting temperature and casting speed

[0035]

[0036] (3) When the pulling speed is 0.72m / min, the softly pressed rollers are 2#, 3#, 4#, 5#, and the torque distribution coefficient of each driving roller is shown in Table 3.

[0037] Table 3 Moment distribution coefficient

[0038]

[0039] (4) When casting bea...

Embodiment 2

[0041] (1) Each parameter of casting machine equipment is as embodiment 1

[0042] (2) The billet size is 280mm×325mm, the steel type is SWRH82B, the total reduction is 10.59mm, the roll numbers for light reduction are 2#, 3#, 4#, 5#, the composition of the steel type, and the casting temperature and pulling speed are shown in Table 4.

[0043] Table 4 steel composition, casting temperature and casting speed

[0044]

[0045] (3) When the pulling speed is 0.80m / min, the softly pressed rollers are 2#, 3#, 4#, 5#, and the torque distribution coefficient of each driving roller is shown in Table 5.

[0046] Table 5 Moment distribution coefficient

[0047] Straightening roller

[0048] (4) When casting SWRH82B, when the pulling speed is 0.80m / min, the torque quickly enters the dynamic distribution after the torque control is put into use, the torque of each driving roller is basically the same as the set torque, and the pulling speed of the detection roller is stable a...

Embodiment 3

[0050] (1) Each parameter of casting machine equipment is as embodiment 1

[0051] (2) The billet size is 280mm×325mm, the steel type is GCr15, and the total reduction is 8mm. The steel composition, casting temperature and casting speed are shown in Table 2.

[0052] Table 2 Steel composition, casting temperature and casting speed

[0053]

[0054] (3) When the pulling speed is 0.65m / min, the softly pressed rollers are 2#, 3#, 4#, and 5#, and the torque distribution coefficients of each driving roller are shown in Table 3.

[0055] Table 3 Moment distribution coefficient

[0056] Straightening roller

[0057] Pull speed adjustment

[0058] (4) When casting bearing steel, when the pulling speed is 0.65m / min, the torque quickly enters the dynamic distribution after the torque control is put into use, the torque of each driving roller is basically the same as the set torque, and the pulling speed of the detection roller is stable at 0.65 Within the range ...

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Abstract

The invention relates to a method for distributing and controlling tension leveler torque in a bloom continuous casting dynamic soft reduction process, belonging to the technical field of metallurgy continuous casting and used for solving the problem of uneven torque distribution of a tension leveler when the tension leveler implements dynamic soft reduction. The invention adopts the technical scheme of selecting measuring rollers; calculating a set value of torque of each drive roller; and comparing a set value with an actual measured value of the torque of each drive roller, and carrying out casting speed regulation. The three steps are continuously carried out in a circulating way to realize torque dynamic distribution. The method distributes the torque in the soft reduction process ofa continuous casting machine by dynamically regulating casting speed thereof according to the torque of each drive roller, thereby realizing tension operation of a casting billet in the tension leveler and reasonable distribution of the torque. By adopting the method, uniform torque distribution of the tension leveler in the soft reduction implementation process can be realized, generation of bulging of the casting billet is avoided, the implementation effect of soft reduction is ensured, and the maintenance period and the service life of equipment are prolonged.

Description

technical field [0001] The invention relates to a continuous casting process, in particular to a torque distribution control method of a tension leveler during the light reduction process of bloom continuous casting, and belongs to the technical field of metallurgical continuous casting. Background technique [0002] With the development of the steel industry, users have higher and higher requirements for the quality of steel products. The bloom continuous casting machine with a billet cross-sectional size greater than 220mm×220mm mainly casts high-quality steel and alloy steel for rolling high-strength section steel, wire rod, channel steel, angle steel, round steel and seamless steel pipe, etc. Steel grades that are more stringent than required. [0003] The tension leveler is an important core equipment among many equipments of the bloom continuous casting machine. Its main function is to pull the continuous casting slab out of the crystal vibrator, perform three-point s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/16
Inventor 祭程胡黎宁侯月华李亚科钟保军朱苗勇张治广刘敬军赵忠义赵贺朝王振山刘小三曹学欠曹磊
Owner XINGTAI IRON & STEEL
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