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A continuous casting slab sizing system and sizing method based on casting-rolling linkage

A continuous casting billet and fixed-length technology, which is applied in the field of metallurgical continuous steel casting, can solve the problems of reduced product yield, full size, and high investment, and achieve the effects of low scrap rate, high yield, and improved economic benefits.

Active Publication Date: 2020-05-15
YANGCHUN NEW STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that the first method can no longer meet the needs of the production of multi-standard products, especially resulting in a large number of short and full lengths of steel rolling, which reduces the yield of products
Even for the same specification, the weight of the billet will fluctuate due to the speed, temperature, cooling rate and crystallizer wear in the production process, which will affect the quality of the product
The second way, to a certain extent, solves the problem of the pass rate, but the online weighing system is prone to fluctuations, resulting in unstable production; on the other hand, the investment is high and the amount of daily maintenance is large.
Therefore, the problem of sizing and weighting of continuous casting slabs has become a bottleneck in the technological development of continuous casting slab cutting, which restricts the yield of steel rolling in downstream processes.

Method used

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  • A continuous casting slab sizing system and sizing method based on casting-rolling linkage
  • A continuous casting slab sizing system and sizing method based on casting-rolling linkage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] In this embodiment, a casting-rolling linkage-based continuous casting slab sizing system or method is provided, including:

[0060] (1) Determine the cross-sectional size of the continuous casting slab; (2) Determine the steel type to be produced; (3) Inquire about the density of the steel type; (4) Determine the meter weight of the billet; (5) Set the rolling specification; (6) Initially set up the continuous casting billet length; (7) query batch rolling scrap rate; (8) correct continuous casting billet length; the correction formula is:

[0061] Lx=L0+sgn(a1-a0)*(a0-a1)*(L0-L1) b

[0062] In the formula: Lx is the length of the continuous casting slab after correction in this batch; sgn() is a symbolic function; L0 is the length of the current batch of continuous casting slab; L1 is the length of the last batch of continuous casting slab; a1 is the scrap rate of the previous batch; a0 is the reject rate of the current batch; b is the length factor.

[0063] (9) I...

Embodiment 2

[0068] Based on the sizing system described in the description of the present invention and the specific method shown in Embodiment 1, this embodiment provides a specific method for sizing the continuous casting slab, the section of the continuous casting slab produced is 155mm × 155mm continuous casting slab, rolling The specification is φ32mm, as follows:

[0069] Control the fixed weight of the continuous casting slab according to the following program flow method, and the casting and rolling linkage control steps are as follows.

[0070] 1. Determine the section size of the continuous casting slab: 155mm×155mm;

[0071] 2. Determine the production steel type: HRB400;

[0072] 3. Query steel density: 7.8233×10 3 kg / m 3 ;

[0073] 4. Determine billet meter weight: 187.95kg / m;

[0074] 5. Set the rolling specification: φ32mm;

[0075] 6. Initially set the length of the continuous casting slab: 11960mm;

[0076] 7. Query the scrap rate of the last two batches of steel r...

Embodiment 3

[0084] This embodiment provides a continuous casting slab quality management system, including:

[0085] (1) Establish a database of quality problems and obtain pictures of defects in the casting slab during the production process. Problems that arise (such as corner cracks, middle cracks, centerline cracks, etc.);

[0086] (2) Carefully classify the pictures of quality problems obtained above. If the pictures involving the bulge have no other quality problems such as rhomboids and cracks, ensure that each picture accurately reflects a specific quality problem of the slab; Crack pictures, the specific list on a single picture belongs to a specific problem type such as corner cracks and centerline cracks (only reflects a specific problem);

[0087] (3) mark the picture obtained in the step (2), the content of the mark processing includes the type of problem, the cause of the problem and the specific process link where the problem occurs and the control measures to overcome the...

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Abstract

The invention discloses a continuous casting blank sizing system based on cast rolling linkage. The continuous casting blank sizing system based on cast rolling linkage comprises the following steps that the section size of a continuous casting blank is determined; the production steel type is determined; the steel type density is inquired; the steel billet meter weight is determined; the rollingspecification is set; the length of the continuous casting blank is initially set; the rejection rate of the batch steel rolling is inquired; and cutting is performed after the length of the continuous casting blank is corrected. According to the continuous casting blank sizing system, the sizing length of the continuous casting blank is dynamically adjusted, and the steel rolling non-sizing ratecaused by steel billet sizing is greatly reduced; the steel waste and steel rolling shorting are reduced, and the rejection rate is reduced; furthermore, the invention further comprises a continuous casting blank quality management system, a continuous casting blank data set is established and continuously optimized and trained, the continuous casting blank quality management system and the sizingsystem are jointly used for producing continuous casting blanks, so that the yield is further improved, and the whole casting rolling production efficiency is further improved on the basis of improving the continuous casting blank sizing quality.

Description

technical field [0001] The invention belongs to the field of metallurgical continuous steel casting, and in particular relates to an intelligent cutting-to-length system based on casting-rolling linkage. Background technique [0002] The continuous casting process is a process in which the molten steel releases heat and gradually solidifies into a certain shape of billet under the condition of continuous production. The upstream processing completes the molten steel, transports it to the turntable in a drum, divides it into several strands through the molten steel distributor, and injects it into the mold. inside, cooling and solidifying into shape, and then the billet is drawn into the arc-shaped sprue, continues to solidify after secondary cooling until it is completely solidified, and then cut after straightening. When the billet head reaches the cutting point, cut the billet head, but cut according to the requirements Cast slabs, such as square blooms, slabs. [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/126B22D11/16
CPCB22D11/126B22D11/163
Inventor 左都伟张立强傅余东郝飞翔聂志斌刘富贵刘学佳周坚孙坤夏一涵
Owner YANGCHUN NEW STEEL CO LTD