SU621416A1 - Method of removing scale from hot metal surface - Google Patents

Method of removing scale from hot metal surface

Info

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
Application number
SU772478833A
Other languages
Russian (ru)
Inventor
Виктор Васильевич Пилипенко
Иван Карпович Манько
Виталий Антонович Дрозд
Владимир Антонович Задонцев
Original Assignee
Pilipenko Viktor Vasilevich
Manko Ivan Karpovich
Drozd Vitalij Antonovich
Zadontsev Vladimir Antonovich
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pilipenko Viktor Vasilevich, Manko Ivan Karpovich, Drozd Vitalij Antonovich, Zadontsev Vladimir Antonovich filed Critical Pilipenko Viktor Vasilevich
Priority to SU772478833A priority Critical patent/SU621416A1/en
Application granted granted Critical
Publication of SU621416A1 publication Critical patent/SU621416A1/en

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)

Формула изобретени Invention Formula Способ удалени  окалнны с поверхности нагретого металла, включающий гидросбив окалины импульсной струей охладител , отличающийс  тем, что, с целью повышени  эффективности удалени  окалины и упрощени  конструкции примен емых при этом технических средств, на поверхность металла подают струю охладител  в режиме периодически срывной кавитации с частотой отрыва кавитационных каверн в диапазоне 300-2000 Гц, который создают в трубопроводе подвода охладител  к устройству дл  гидросбива окалины. Источники информации, прин тые во внимание при экспертизе 1. Авторское свидетельство СССР № 208651, кл. В 21В 45/08, 1962.A method of removing incandescents from the surface of a heated metal, including hydroscaling of oxides by a pulsed jet of a cooler, characterized in that, in order to increase the efficiency of descaling and simplify the design of the technical means used in this process, a jet of a cooler is fed to the metal surface in a periodically disruptive cavitation mode with a tear-off frequency cavitation cavities in the range of 300-2000 Hz, which is created in the pipeline supplying a coolant to the descaler. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 208651, cl. B 21B 45/08, 1962.
SU772478833A 1977-04-25 1977-04-25 Method of removing scale from hot metal surface SU621416A1 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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