SU1694262A1 - Rolling mill for manufacture of low-grade and medium-grade steel - Google Patents

Abstract

The invention relates to the arrangement of equipment for high-performance rolling mills for the production of small and medium steel. 11el of the invention - increasing productivity and expanding technological capabilities, the mill contains furnaces 1 and 2, a rough group of 3 stands and two parallel finishing lines: small section 5 and medium section 6. Line 5 is connected not only with coilers 9 to the refrigerator 7, which It has an output and a line 6. In addition, annealing furnaces 11 are provided, connected on the input side with line 6 and on the side exits with winders 9. Such a mill scheme allows to increase the mill load and its productivity, to vary the rolling technology more flexibly. 1 il.

Description

The invention relates to the location of equipment of high-performance rolling mills for the production of low-grade and medium-grade steel

The purpose of the invention is to increase productivity and expand technological capabilities.

The drawing shows a diagram of a rolling mill.

After two furnaces 1 and 2, draft group 3 follows with horizontal and vertical stands. After that, the process stream is divided into a small-grade rolling line 5 - with a continuous furnace 4 in front of it - and a medium-grade rolling line 6. After the small-grade line 5, on the one hand there is a refrigerator 7 and a cleaning section 8, and on the other hand, a winder 9, a transmission device 10 and annealing furnaces 11. The transmission device 10 is connected to the annealing furnaces 12 by a roller conveyor 11. Communication via a roller conveyor 12 is also provided. and a transmission device '10 with a hook conveyor 13 and a discharge station 1'4. After the mid-grade line 6, scissors 16 follow, after which in turn follows on the one hand the refrigerator 7 with the cleaning section 8, and on the other hand the brake roller table 17 with the subsequent transmission device 18. Transmission; The device 18 is connected through the roller conveyor 12 to the annealing furnaces 11. The annealing furnaces 11 through the roller conveyor 12 are connected to the harvesting station 15. The starting material heated in furnaces 1 and 2, for example, a workpiece of 170 mm, is rolled in draft group 3. In the case of of the production of a small grade, the metal passes through a continuous furnace 4 and is rolled in a small-grade line 5 with feeding sizes 0 12 to 32 mm and other profiles onto a refrigerator 7 with a subsequent cleaning section 8, and size £ ^; 12 to 40 and other profiles in the installation of coilers 9. and thus with the supply of choice or through a transfer device 10, a roller conveyor 12 and annealing furnace 11, or directly to the hook conveyor 13 and the unloading station 14. In the case of the release of medium grade in size ^ 33 to 75 mm and other profiles does the metal go through a mid-grade line 6 or with feeding after cutting with scissors 16 to lengths · corresponding to the length of the refrigerator, to the refrigerator? and the subsequent cleaning section 8, or with feeding after cutting with scissors to the finished lengths on the brake roller table and through the transfer device 18 to the roller conveyor 12, in the annealing furnace 11 and to the cleaning section 15.

Rolled sgan makes it possible, regardless of the cross section of the finished rolled products and regardless of the used rolling line, to work continuously with the maximum productivity of the furnaces, to achieve, by rolling alternately, to minimize the transition time to another profile without compromising performance.

The prerequisites for this are created by the diverse interconnections of adapter units, which enable continuous rolling.

Further, cutting to finished lengths with scissors directly behind the mid-range rolling line is effective and subsequent loading of the rolled products with the rolling temperature in the annealing furnace with the associated savings in energy, materials, capital investment and labor. These benefits apply equally to the small variety in riots. These advantages are further enhanced by the combined use of only one annealing plant for rolling, obtained both on small-grade and medium-grade rolling lines.

Claims (1)

Claim Rolling mill for the production of small-grade and medium-grade steel, containing heating furnaces, a roughing group with alternating horizontal and vertical stands, small-grade and medium-grade finishing groups of stands located parallel to each other behind the roughing group, a refrigerator associated with a medium-sized group, coilers associated with small-sized group, scissors and cleaning products after the refrigerator and coilers, characterized in that, in order to increase productivity and expand technological capabilities d, the small-sized group of stands is additionally connected to the refrigerator, and the mill is equipped with a section of annealing furnaces, connected on the input side with a medium-sized group of stands, and on the output side with winders.