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Large section steel rolling production system and method

A production method and production system technology, applied in the direction of metal rolling, etc., can solve the problems of increasing oxidation and burning loss of continuous casting slabs, large temperature drop of rolled pieces, and high production costs

Active Publication Date: 2017-09-26
HUATIAN ENG & TECH CORP MCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Rolling from rectangular or special-shaped cross-section continuous casting slabs to large-scale steel products has a long rolling cycle and a large temperature drop. Rectangular or special-shaped cross-section continuous casting slabs are required to be heated at a high temperature in the heating furnace, which increases the energy of the heating furnace Consumption, increasing the oxidation and burning loss of the continuous casting billet, and also increasing the carbon dioxide emission of the heating furnace;
[0007] (2) During the reciprocating and reversing continuous rolling process of the 3-stand reversible continuous rolling unit (1U / HR+1E+1U / HF), it is necessary to continuously adjust the roll gap of each rolling mill, so the manufacturing accuracy of the rolling mill body and the corresponding matching Hydraulic facilities, electrical control systems, production operations and maintenance are extremely demanding. If operation adjustments or system maintenance are improper, it will be difficult to guarantee the production quality of large-scale steel products;
[0008] (3) The special X—H pass system adopted by the 3-stand reversing tandem rolling unit (1U / HR+1E+1U / HF) leads to large consumption of rolls and high production costs

Method used

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  • Large section steel rolling production system and method

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Experimental program
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Effect test

Embodiment 1

[0036] like figure 2As shown, this implementation of a large-scale section steel rolling production system includes a first horizontal two-roll reversible billeting mill system and a second horizontal two-roller reversible billeting mill system arranged continuously, the first horizontal two-roller reversible billeting mill system The billet rolling mill system is connected to the second horizontal two-roll reversible billet splitting mill system to form a continuous rolling relationship. After the second horizontal two-roller reversible billet splitting mill system, 8-11 continuous rolling mill units 212 are arranged continuously.

[0037] like image 3 As shown, the first horizontal two-roll reversible billeting mill system includes a first horizontal two-roller reversible billeting mill 204 and the first horizontal two-roller reversible billeting mill 204 sequentially arranged before the first billeting mill The front working roller table 202 and the front extension rolle...

Embodiment 2

[0043] Present embodiment a kind of large section steel rolling production method, described method comprises the following steps:

[0044] 1) The continuous casting slab with rectangular or special-shaped cross-section is transported to the working roller table 202 in front of the first billet rolling mill and guided by the pusher 203 in front of the first billet rolling mill to correctly center the pass;

[0045] 2) The working roller table 202 in front of the first blanking mill, the first horizontal two-roll reversible blanking mill 204 and the second horizontal two-roll reversible blanking mill 205 are running in the forward direction, and the continuous casting blanks with rectangular or special-shaped sections are sequentially sent to the second 1. The second horizontal two-high reversible billet mill is used for the first pass of double-stand continuous rolling;

[0046] 3) Stop the rolled piece in step 2) on the working roller table 206 after the second blanking mill ...

Embodiment 3

[0052] Based on the above-mentioned embodiment 2, step 1) and step 3) in this embodiment also include turning over the continuous casting slab or rolled piece.

[0053] The step 1) also includes heating the continuous casting slab with rectangular or special-shaped cross-section and removing the primary iron scale through a high-pressure water descaling device.

[0054] Before the step 2) and the step 4), there is a step of adjusting the roll gap of the first horizontal two-roll reversible billeting mill 204 and the second horizontal two-roller reversible billeting mill 205 according to a predetermined reduction.

[0055] The step 7) also includes the step of: cutting off the irregular head of the intermediate blank in the step 6).

[0056] The step 7) specific steps include:

[0057] After transporting, lifting and centering, the intermediate billet is sent to 3 to 6 universal / horizontal two-roll interchange mills, 1 edge rolling / horizontal two-roll interchange mill, 2 unive...

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Abstract

The invention discloses a large section steel rolling production system. The large section steel rolling production system comprises a first horizontal two-roller reversible primary mill system and a second horizontal two-roller reversible primary mill system which are continuously arranged and connected to form a continuous rolling relation. 8-11 continuous rolling units are continuously arranged behind the second horizontal two-roller reversible primary mill system. The defects in the large section steel rolling production technology in the prior art are overcome, the technological layout is reasonable, energy consumption is reduced, environmental protection is achieved, production operation and maintenance are easy, the production cost is reduced, and the product quality is easy to control.

Description

technical field [0001] The invention relates to a large section steel rolling production system and method. Background technique [0002] For the production of H-beams with a web height of 500mm-1000mm or large-scale steel products of equivalent specifications, the steel rolling production line is generally equipped with 1 to 2 horizontal two-roll reversible blanking mills (1BD / 1BD+1BD) according to the production scale and product cross-section complexity. Rectangular or special-shaped cross-section continuous casting slabs are first reciprocated and reversible multi-pass single-machine rolling, and rolled into intermediate billets with suitable cross-sections, and then sent to the downstream 3-stand reversible continuous rolling unit (1 universal / horizontal two-roll interchangeable roughing mill U / HR+1 horizontal two-roll edge mill E+1 universal / horizontal two-roll interchangeable finishing mill U / HF), through reciprocating and reversible multi-pass three-stand continuous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/08
CPCB21B1/08B21B1/0805Y02P70/10
Inventor 孙建国方实年蒲春雷
Owner HUATIAN ENG & TECH CORP MCC
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