CN219724091U - Novel semi-continuous rolling production system - Google Patents

Abstract

The utility model discloses a novel semi-tandem rolling production system, which comprises: the cogging mill group, the rough mill group and the finishing mill group are three groups of rolling mills; wherein, the cogging mill set is provided with 1 cogging machine which is arranged independently; the roughing mill set is provided with 1 universal/two-roll interchangeable rolling mill and 1 two-roll edging mill, which are arranged continuously; the finishing mill group is provided with 7 universal/two-roll interchangeable rolling mills and is arranged continuously. By adopting the utility model, a roughing mill set is newly added, the production mode is more flexible, the total number of rolling mills is less, and firstly, the equipment investment of a production line is reduced; the rough rolling also adopts reciprocating rolling, and the rolling can be selected to be participated or not according to the product forming requirement, so that the production organization mode is more flexible; and thirdly, the finish rolling is arranged continuously, so that the production capacity of the rolling mill can be fully exerted, the production cost is effectively reduced, and the market competitiveness of enterprises is enhanced.

Description

Novel semi-continuous rolling production system

Technical Field

The utility model relates to a novel semi-tandem rolling production system for producing medium and large-sized section steel, in particular to a flexible and efficient novel semi-tandem rolling production process for medium and large-sized H-shaped steel, I-shaped steel, angle steel, channel steel and sheet piles.

Background

The traditional production mode of H-shaped steel has three main technological arrangements according to the specification and the size:

the first is tandem arrangement, mainly arranged as follows: 1 or 2 blooming mills, which are independently arranged and roll reciprocally; the universal roughing mill set is arranged in a 3-frame mode, the rolling mill is arranged in a universal mode, a edging mode and a universal mode, the rolling mill is arranged continuously, and the rolling mill is rolled in a reciprocating mode; the universal finishing mill is 1 or 2 frames, and the arrangement is usually edging + universal, and rolling is carried out for 1 time. The tandem process arrangement is mostly used for H600X300 and above large H-shaped steel products such as I-shaped steel, channel steel, angle steel, 500-750 series steel sheet piles and the like with equivalent section size. At present, a domestic more popular mode is to adopt an X-H rolling process in a universal roughing mill group, so that the universal finishing mill group is canceled. The main advantage of the tandem arrangement is that with a minimum of universal rolling mills, fully usable universal passes are provided to reduce the number of universal rolling mills and production line investment. The defect is that when the rolling mill is used for small and medium H-shaped steel, the productivity of the production line is drastically reduced due to low reciprocating rolling efficiency.

And secondly, semi-continuous arrangement is mainly arranged as follows: 1 or 2 blooming mills, which are independently arranged and roll reciprocally; the finishing mill group is arranged in 10-11 frames of rolling mills and is arranged continuously. Semi-continuous arrangements are commonly used in the production of H500X200 and below medium H-section steels and section steel products of comparable cross-sectional dimensions, I-section steels, channel steels, angle steels, and 400-500 series steel sheet piles. The domestic finishing mill groups are mainly 11 frames so as to reduce the number of cogging mill passes and improve the productivity of the production line. The most important advantage of semi-continuous arrangement is the high throughput of the mill, especially for medium-sized smaller gauges; the disadvantage is that the number of the universal passes is small for the specification of H600X300 or more, for example, the continuous rolling mill is added, the investment of production line equipment and plants is increased, and the economical efficiency is poor.

Thirdly, the full continuous arrangement is mainly arranged as follows: 14-16 frames are arranged in succession. The method is mainly used for producing H-shaped steel with the specification of below H250X125, I-shaped steel with the equivalent section size, channel steel, angle steel and other steel products. The main advantage of the fully continuous arrangement is high productivity of the rolling mill, and the disadvantage is poor flexibility of the production line and low utilization rate of partial rolling mill.

Disclosure of Invention

In order to overcome the defects, the utility model aims to provide a novel semi-tandem rolling production system for producing medium-large-specification section steel.

To achieve the above object, the present utility model provides a novel semi-tandem rolling production system, comprising:

the cogging mill group, the rough mill group and the finishing mill group are three groups of rolling mills;

wherein, the cogging mill set is provided with 1 cogging machine which is arranged independently;

the roughing mill set is provided with 1 universal/two-roll interchangeable rolling mill and 1 two-roll edging mill, which are arranged continuously;

the finishing mill group is provided with 7 universal/two-roll interchangeable rolling mills and is arranged continuously.

Further, the method for rolling H-shaped steel and I-shaped steel by the system comprises the following steps:

1 frame of bloom rolling mill is adopted, and a roughing mill set adopts 1 frame of universal roughing mill and 1 frame of edging mill; the finishing mill group adopts 5 universal rolling mills and 2 edging mills, and the finishing mill group is arranged as follows: universal + universal + edging + universal;

a single stand of a cogging mill is arranged for reciprocating rolling;

the roughing mill set is provided with 2 rolling mills which are arranged continuously and roll reciprocally;

and 7 rolling mills of the finishing mill group are arranged continuously, and the intermediate billet is rolled into H-shaped steel and I-shaped steel finished products at one time. Compared with the traditional semi-continuous production line, the upper limit of products is expanded, the productivity advantages of the semi-continuous rolling production line rolling mill are fully exerted, the production capacity of the production line is improved, and the production capacity of the production line is improved for large-specification H-shaped steel, I-shaped steel, channel steel, angle steel, steel sheet piles and the like; meanwhile, the reduction of the number of the rolling mills of the finishing mill group can save equipment investment and reduce production and operation costs.

Further, when rolling angle steel and channel steel, adopting a 1-frame blank-stripping rolling mill; the method comprises the steps of carrying out a first treatment on the surface of the The rough rolling machine set is not used; the finishing mill group adopts 7 two-roll mills; a single stand of a cogging mill is arranged for reciprocating rolling; and 7 rolling mills of the finishing mill group are arranged continuously, and the intermediate billet is rolled into angle steel and channel steel finished products at one time.

Further, when rolling the steel sheet pile, adopting 1 frame of bloom rolling mill, wherein the roughing mill set adopts only 1 frame of two-roller rolling mill, and the edging mill is not used; the finishing mill group adopts 7 two-roll mills;

a single stand of a cogging mill is arranged for reciprocating rolling; the rough rolling machine set uses 1 frame to roll reciprocally; and 7 rolling mills of the finishing mill group are arranged continuously, and the intermediate billet is rolled into a steel sheet pile finished product at one time.

The utility model provides a novel semi-tandem rolling production process for producing medium-large-specification section steel, which solves the problems of coexistence of multiple products such as H-shaped steel, sheet piles, angle steel and the like of the conventional medium-large-specification section steel production line, solves the problem of balanced production capacity of the conventional production line, and solves the problems of a large number of finishing mill groups and long preparation period of a replacement specification rolling mill of the conventional production line.

By adopting the utility model, a roughing mill set is newly added, the production mode is more flexible, the total number of rolling mills is less, and firstly, the equipment investment of a production line is reduced; the rough rolling also adopts reciprocating rolling, and the rolling can be selected to be participated or not according to the product forming requirement, so that the production organization mode is more flexible; and thirdly, the finish rolling is arranged continuously, so that the production capacity of the rolling mill can be fully exerted, the production cost is effectively reduced, and the market competitiveness of enterprises is enhanced.

Drawings

Fig. 1 is a rolling mill layout diagram of a novel semi-tandem rolling production process for producing medium-and large-sized section steel according to an embodiment of the present utility model:

FIG. 2 shows a roughing mill with 1 frame of universal roughing mill and 1 frame of edging mill for rolling H-section steel and I-section steel; the finishing mill group adopts 5 universal rolling mills and 2 edging mills, and the finishing mill group is arranged as follows: universal + universal + edging + universal.

FIG. 3 shows that when angle steel and channel steel are rolled, a 1-frame bloom rolling mill is adopted, and a roughing mill set is not used; the finishing mill group adopts 7 two-roll mill.

FIG. 4 shows a roughing mill set with 1 bloom mill and only 1 two-high mill, with the edging mill not used, when rolling sheet piles; the finishing mill group adopts 7 two-roll mill.

Reference numerals illustrate:

i-blooming mill section: 1-cogging mill; II-roughing section: 2-roughing mill I; 3-a second roughing mill; III-finishing section: 4-finishing mill I; 5-finishing mill II; 6-finishing mill III; 7-finishing mill IV; 8-finishing mill five; 9-finishing mill six; 10-finishing mill seven.

Detailed Description

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in FIG. 1, the novel semi-tandem rolling production system for producing medium-large-specification section steel comprises three groups of rolling mills, namely a cogging mill area, a roughing mill area and a finishing mill area. The cogging mill area is provided with 1 cogging mill which is arranged independently; the roughing mill is provided with 1 universal/two-roll interchangeable rolling mill and 1 two-roll edging mill, which are arranged continuously; the finishing mill group is provided with 7 universal/two-roll interchangeable rolling mills, which are arranged continuously.

As shown in fig. 2, the rolling method is a rolling method when rolling H-steel and i-steel. 1 frame of bloom rolling mill is adopted, and a roughing mill set adopts 1 frame of universal roughing mill and 1 frame of edging mill; the finishing mill group adopts 5 universal rolling mills and 2 edging mills. The rolled piece is rolled back and forth for 5 to 7 times by a cogging mill and is sent to a roughing mill set by a roller way, the roughing mill set is arranged continuously by adopting 1 universal mill and 1 edging mill, and the rolled piece is rolled back and forth for 3 to 5 times in the roughing mill set; and then the rolled piece is sent to a finishing mill group by a roller way. The finishing mill group is arranged continuously for 7 rolling mills, and specifically comprises: the intermediate blank is rolled into H-shaped steel and I-shaped steel finished products at one time. The universal rolling pass of the roughing mill set can be increased or reduced according to the forming requirement of the product, the production mode is more flexible, the H-shaped steel product with larger specification can be produced, the upper limit of the H-shaped steel product of the production line is expanded, the production cost is effectively reduced, and the market adaptability and the competitive power are enhanced.

As shown in fig. 3, in order to roll angle steel and channel steel, a 1-frame blooming mill is adopted, and a roughing mill set is not used; the finishing mill group adopts 7 two-roll mill. The rolled piece is rolled back and forth for 5 to 7 times by a cogging mill and is directly sent to a pre-finishing unit by a roller way. The finishing mill group is arranged continuously for 7 two-roll mills, and the intermediate billet is rolled into angle steel and channel steel finished products at one time. Products such as angle steel and channel steel can be manufactured without a roughing mill set, so that the process operation is simplified, the investment of process parts such as rollers, guide and guard of the roughing mill set is reduced, the efficient and low-energy-consumption production is realized, the production cost is reduced, and the market competitiveness of enterprises is improved.

As shown in fig. 4, the rolling method is a rolling method in rolling a steel sheet pile. The method is characterized in that 1 bloom mill is adopted, a roughing mill set only adopts 1 two-roll mill, and an edging mill is not used; the finishing mill group adopts 7 two-roll mill. The rolled piece is rolled back and forth for 5 to 7 times by a cogging mill, and is sent to a rough rolling unit by a roller way, and the rough rolling unit is rolled back and forth for 3 times by adopting 1 frame of two-roller mill; and then the rolled piece is sent to a finishing mill group by a roller way. The finishing mill group is arranged continuously for 7 two-roll mills, and the intermediate billet is rolled into a steel sheet pile finished product at one time. Compared with the traditional semi-continuous production line, the production organization is more flexible, steel sheet pile products with larger specifications can be produced, the variety and the specification of the production line are more complete, and the market change adaptability is enhanced.

The present utility model has been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model. Many other changes and modifications may be made without departing from the spirit and scope of the utility model and should be considered as within the scope of the utility model.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (1)

1. Novel semi-tandem rolling production system, characterized in that, the system includes:

the cogging mill group, the rough mill group and the finishing mill group are three groups of rolling mills;

wherein, the cogging mill set is provided with 1 cogging machine which is arranged independently;

the roughing mill set is provided with 1 universal/two-roll interchangeable rolling mill and 1 two-roll edging mill, which are arranged continuously;

the finishing mill group is provided with 7 universal/two-roll interchangeable rolling mills and is arranged continuously.