SU621416A1 - Method of removing scale from hot metal surface - Google Patents
Method of removing scale from hot metal surfaceInfo
- Publication number
- SU621416A1 SU621416A1 SU772478833A SU2478833A SU621416A1 SU 621416 A1 SU621416 A1 SU 621416A1 SU 772478833 A SU772478833 A SU 772478833A SU 2478833 A SU2478833 A SU 2478833A SU 621416 A1 SU621416 A1 SU 621416A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- metal surface
- pressure
- hot metal
- cooler
- removing scale
- Prior art date
Links
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
рост следующей каверны и так далее. Процесс образовани , отрыва и захлопывани кавитационных каверн происходит автоматически . Давление в месте размещени сопл 2 в 1,5-2,5 раза выше по сравнению с давлением на входе в канал, при этом большим давлени м на входе соответствуют более мощные гидроударные повышени давлени . Так, при давлении на входе 200 атм перед соплами давление достигает пор дка 500 атм. Таким образом, периодический отрыв и захлопывание кавитационных каверн позвол ет получать пульсирующие струи жидкости. Заготовка, движуща с по рольгангу, попадает под пульсирующие струи жидкости, причем давление в струе жидкости переменно во времени и во врем повышени давлени в несколько раз превышает значени давлени , создаваемого насосом, на входе в систему гидросбива . Таким образом, струи жидкости, истекающие через сопла, долб т окалину на поверхности слитка, обеспечива ее эффективное удаление. При этом наибольший эффект очистки при наименьшем давлении на входе в напорный бак достигаетс при частоте пульсаций, равной или близкой к собственной частоте колебаний окалины, завис щей от химсостава окалины, ее температуры и т. д. Экспериментальна проверкаthe growth of the next cavern and so on. The process of formation, separation and slam of cavitation cavities occurs automatically. The pressure at the location of the nozzles 2 is 1.5-2.5 times higher than the pressure at the inlet to the channel, with more pressure at the inlet corresponding to more powerful hydrostatic pressure increases. Thus, at an inlet pressure of 200 atm, before the nozzles, the pressure reaches about 500 atm. Thus, the periodic separation and collapse of cavitation cavities allows to obtain pulsating jets of liquid. The billet moving along the roller table falls under pulsating jets of liquid, and the pressure in the liquid jet varies over time and during pressure build-up several times higher than the pressure generated by the pump at the inlet of the sludge. Thus, jets of fluid flowing through the nozzles, dolb t the scale on the surface of the ingot, ensuring its effective removal. At the same time, the greatest cleaning effect at the lowest pressure at the inlet to the pressure tank is achieved at a pulsation frequency equal to or close to the natural frequency of the oscillation of the scale, depending on the chemical composition of the scale, its temperature, etc. Experimental verification
способа показывает, что в зависимости от вида проката и окалины оптимальна частота импульсов находитс в диапазоне 300-2000 Гц.The method shows that, depending on the type of rolled stock and scale, the optimal pulse frequency is in the range of 300-2000 Hz.
Применение предлагаемого способа позвол ет повысить эффективность удалени окалины при относительно низких давлени х охладител , подаваемого в устройство дл гидросбива, и исключает необходимость применени специальных устройств, например импульсных водометов.The application of the proposed method makes it possible to increase the efficiency of descaling at relatively low pressures of the cooler supplied to the desiccator and eliminates the need to use special devices, such as pulsed water cannons.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772478833A SU621416A1 (en) | 1977-04-25 | 1977-04-25 | Method of removing scale from hot metal surface |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772478833A SU621416A1 (en) | 1977-04-25 | 1977-04-25 | Method of removing scale from hot metal surface |
Publications (1)
Publication Number | Publication Date |
---|---|
SU621416A1 true SU621416A1 (en) | 1978-08-30 |
Family
ID=20706078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772478833A SU621416A1 (en) | 1977-04-25 | 1977-04-25 | Method of removing scale from hot metal surface |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU621416A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2592338C2 (en) * | 2011-05-16 | 2016-07-20 | Ниппон Стил Энд Сумикин Инджиниринг Ко., Лтд. | Device for cleaning forming roll mill and method of cleaning |
RU2637192C1 (en) * | 2013-11-29 | 2017-11-30 | Смс Груп Гмбх | Method and device for removing ocaline from metallic surface and also installation for manufacture of metal semi-finished products |
-
1977
- 1977-04-25 SU SU772478833A patent/SU621416A1/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2592338C2 (en) * | 2011-05-16 | 2016-07-20 | Ниппон Стил Энд Сумикин Инджиниринг Ко., Лтд. | Device for cleaning forming roll mill and method of cleaning |
RU2637192C1 (en) * | 2013-11-29 | 2017-11-30 | Смс Груп Гмбх | Method and device for removing ocaline from metallic surface and also installation for manufacture of metal semi-finished products |
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