RU2008135453A

RU2008135453A - METHOD AND CASTING PLANT FOR THE PRODUCTION OF A HOT-ROLLED STRIP, IN PARTICULAR OF A STEEL STRIP, WITH A HIGH SURFACE QUALITY

Info

Publication number: RU2008135453A
Application number: RU2008135453/02A
Authority: RU
Inventors: Кристиан БИЛЬГЕН (DE); Кристиан БИЛЬГЕН; Тильманн БЕХЕР (DE); Тильманн БЕХЕР; Вольфганг ХЕННИНГ (DE); Вольфганг ХЕННИНГ; Юрген ГЕЙДУЛ (SE); Юрген ГЕЙДУЛ
Original assignee: Смс Демаг Аг (De); Смс Демаг Аг; Херматик Хидраулик Аб (Se); Херматик Хидраулик Аб
Priority date: 2006-02-02
Filing date: 2006-12-22
Publication date: 2010-03-10
Also published as: CN101410198B; BRPI0621300A2; UA95100C2; CA2640751A1; RU2414978C2; TWI381894B; AU2006337463A1; US20120048501A1; CN101410198A; EP1981660B1; ES2389860T3; EP1981660A1; CA2640751C; JP2009525182A; AR059290A1; KR20080106891A; EG25282A; TW200732060A; ZA200805313B; MX2008009949A

Abstract

1. Способ изготовления горячекатаной металлической полосы, в частности стальной полосы (7), с высоким качеством поверхности из непрерывных слябов или плоских тонких заготовок (2, 2а), отливаемых непрерывной разливкой с использованием кристаллизатора (9) с гидравлическим приводом возвратно-поступательного движения, в котором предусмотрена очистка поверхности (2 с) от окалины, нагрев до температуры прокатки, чистовая прокатка в многоклетьевом стане (6) горячей прокатки полосы до небольших толщин полос, причем отливаемую заготовку (2а) после выхода из направляющей (3) заготовки, перед подачей в печь (4) для выравнивания температуры и/или после выхода из печи (4) для выравнивания температуры и подачи в стан (6) горячей прокатки полосы на одной или на обеих поверхностях (2 с) подвергают гидросбиву окалины посредством нескольких вращающихся сопел (15), из которых рабочая жидкость (19) под большим давлением периодически подается на соответствующее место поверхности, причем осуществляется очистка от окалины и/или литейного порошка и тщательная очистка от отпечатков возвратно-поступательного движения, отличающийся тем, что кристаллизатор (9), совершающий возвратно-поступательное движение с помощью гидравлического привода, выполнен с возможностью перемещения по нескольким различным траекториям (16, 17, 18) возвратно-поступательного движения, причем траектории (16, 17, 18) возвратно-поступательного движения образуются за счет различных амплитуд возвратно-поступательного движения кристаллизатора (9), различных скоростей литья, различных опережающих скоростей возвратно-поступательного движения кристаллизатора (9) во время его обратно1. A method of manufacturing a hot-rolled metal strip, in particular a steel strip (7), with a high surface quality from continuous slabs or flat thin billets (2, 2a), cast by continuous casting using a mold (9) with a hydraulic reciprocating motion, which provides for cleaning the surface (2 s) from scale, heating to the rolling temperature, finishing rolling in a multi-stand mill (6) hot strip rolling to small strip thicknesses, and the cast billet (2a) after leaving the billet guide (3), before feeding into the furnace (4) to equalize the temperature and / or after leaving the furnace (4) to equalize the temperature and feed the strip to the hot rolling mill (6) on one or both surfaces (2 s), descaling is subjected to water descaling by means of several rotating nozzles (15 ), from which the working fluid (19) under high pressure is periodically supplied to the corresponding place on the surface, and cleaning is carried out weaving from scale and / or casting powder and thorough cleaning from imprints of reciprocating motion, characterized in that the mold (9), which reciprocates with the help of a hydraulic drive, is configured to move along several different trajectories (16, 17, 18) reciprocating motion, and the trajectories (16, 17, 18) of the reciprocating motion are formed due to different amplitudes of the reciprocating movement of the mold (9), different casting speeds, different advancing speeds of the reciprocating movement of the mold (9) in time it back

Claims

1. A method of manufacturing a hot-rolled metal strip, in particular a steel strip (7), with a high surface quality from continuous slabs or flat thin billets (2, 2a) cast by continuous casting using a mold (9) with a hydraulic reciprocating drive, which provides for cleaning the surface (2 s) of scale, heating to rolling temperature, finishing rolling in a multi-stand mill (6) for hot rolling of the strip to small strip thicknesses, and the cast billet (2a) after yes, from the workpiece guide (3), before feeding into the furnace (4) to equalize the temperature and / or after leaving the furnace (4) to equalize the temperature and supply to the mill (6) hot strip rolling on one or both surfaces (2 s ) hydroscale the scale by means of several rotating nozzles (15), of which the working fluid (19) is periodically supplied under high pressure to the appropriate surface location, moreover, scale and / or casting powder is cleaned and the reciprocating fingerprints are thoroughly cleaned movement, characterized in that the mold (9), reciprocating with a hydraulic actuator, is configured to move along several different paths (16, 17, 18) of the reciprocating movement, and the trajectory (16, 17, 18) reciprocating motion are formed due to different amplitudes of the reciprocating motion of the mold (9), different casting speeds, different leading speeds of the reciprocating motion of the mold (9) during its back the course and various forms of the trajectories of movement, while deep cleaning of the prints of the reciprocating movement is achieved by setting for each cast billet a certain form of the trajectory (16a, 17a, 18a) of the reciprocating movement.

2. The method according to claim 1, characterized in that the supply of the rotating nozzles (15) with a working fluid (19) is carried out at a significantly lower amount of the working medium than was previously used in traditional devices for descaling with the same process parameters of continuous casting or rolling .

3. The method according to any one of claims 1 or 2, characterized in that by supplying the rotating nozzles (15) with a working medium (19), regulated depending on the temperature of the billet (2b) of continuous casting or rolling, the heat loss of the billet (2b) kept low.

4. Casting and rolling plant (1), in particular a compact unit (CSP), consisting of a device (2) for continuous casting of liquid metals, in particular liquid steel, with a mold (9), which is connected to a hydraulic drive (9a) reciprocating movement, while the mold in the direction (11) of drawing the workpiece is followed by at least a guide (3) of the workpiece, a furnace (4) for equalizing the temperature, if necessary, a carriage (5) of the furnace, and a multi-stand finishing mill (6) hot rolling strip, as well as coiler (8), from characterized in that between the workpiece guide (3) and the furnace (4) for temperature equalization or between the pulling device (12) and scissors (13), and / or between the temperature equalization furnace (4) and the multi-strand finishing mill (6 ) for hot rolling of the strip before the first rolling, a device (14) is installed with rotating nozzles (15), of which the working medium (19) is periodically supplied under high pressure to the corresponding surface location.

5. Installation according to claim 4, characterized in that several nozzles (15) for a working medium (19) are installed on one rotor (20).

6. Installation according to any one of claims 4 or 5, characterized in that several rotors (20) with nozzles (15) for the working medium (19) located around the circumference (20a) of the rotors are installed in one row (21) across the direction the movement of the workpiece (2b) continuous casting or rolling.

7. Installation according to any one of paragraphs.4 or 5, characterized in that on the finishing mill (6) hot rolling strip with seven or more stands (6A) before applying to the first finishing stand (6A) provides for the use of rotary descaling.