SU1504254A1 - Method of reheating blast-furonace air-heater lined with silica brick refractory in high-temperature zone - Google Patents
Method of reheating blast-furonace air-heater lined with silica brick refractory in high-temperature zone Download PDFInfo
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- SU1504254A1 SU1504254A1 SU874308885A SU4308885A SU1504254A1 SU 1504254 A1 SU1504254 A1 SU 1504254A1 SU 874308885 A SU874308885 A SU 874308885A SU 4308885 A SU4308885 A SU 4308885A SU 1504254 A1 SU1504254 A1 SU 1504254A1
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- USSR - Soviet Union
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- lining
- reheating
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- temperature zone
- heater
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Abstract
Изобретение относитс к области нагрева дуть в доменную печь в черной металлургии, а именно к процессу разогрева доменных воздухонагревателей. Цель изобретени - повышение стойкости футеровки. Дл исключени преждевременного разрушени футеровки следует повторный разогрев воздухонагревател , футерованного в высокотемпературной зоне динасовым огнеупором, вести по графику, предусматривающему подъем температуры внутренней поверхности футеровки купола до 300°С со скоростью 1,8-2,2°С/ч, от 300 до 500°С со скоростью 2,8-3,2°С/ч, от 500 до 1000°С со скоростью 6,8-7,2°С/ч. Применение изобретени повышает срок службы футеровки в 1,5-2 раза. 2 ил.The invention relates to the field of heating to blow into a blast furnace in the ferrous metallurgy, in particular to the process of heating a blast furnace. The purpose of the invention is to increase the durability of the lining. To avoid premature destruction of the lining, the reheating of the air heater lined in the high-temperature zone with a refractory refractory should be maintained according to a schedule that raises the temperature of the inner surface of the dome lining to 300 ° C at a speed of 1.8-2.2 ° C / h from 300 to 500 ° C at a rate of 2.8-3.2 ° C / h, from 500 to 1000 ° C at a rate of 6.8-7.2 ° C / h. The application of the invention increases the service life of the lining by 1.5-2 times. 2 Il.
Description
Изобретение относитс к нагреву дуть в доменную печь в черной металлургии , а именно к процессу разогрева доменных воздухонагревателей.The invention relates to heating blowing into a blast furnace in the ferrous metallurgy, in particular to the process of heating a blast furnace heater.
Цель изобретени - повьшение стойкости футеровки.The purpose of the invention is to increase the durability of the lining.
На фиг. 1 представлен график повторного разогрева воздухонагревател ; , на фиг. 2 - зависимость напр жений , возникающих в футеровке в период повторного разогрева.FIG. 1 is a graph showing the reheating of the air heater; in FIG. 2 - dependence of stresses arising in the lining during reheating.
Способ осуществл етс следующим образом.The method is carried out as follows.
Дл исключени преждевременного разрушени футеровки следует повторный разогрев воздухонагревател , футерованного в высокотемпературной зоне динасовым огнеупором, вести поTo eliminate the premature destruction of the lining, it is necessary to reheat the heater, lined in the high-temperature zone with a silica refractory, to lead
графику, предусматривающему подъем температуры внутренней поверхности футеровки купола до 300°С со скоростью 1,8-2,2°С/ч, от 300 до 500°С со скоростью 2,8-3,, от 500 до со скоростью 6,8-7,2°С/ч.graphics that provide for raising the temperature of the inner surface of the dome lining to 300 ° C at a speed of 1.8-2.2 ° C / h, from 300 to 500 ° C at a speed of 2.8-3 ,, from 500 to at a speed of 6.8 -7.2 ° C / h.
Дальнейший разогрев от до заданной температуры ведут по известному способу, предусматривающему скорость- в этом интервале 9,8- 10, 2 С/ч.Further heating from to a predetermined temperature is carried out according to a known method, providing for a speed in the range of 9.8-10, 2 C / h.
Разогрев со скорост ми выше верхних Пределов рекомендуемых допустимых скоростей не допустим, так как приводит к термическому разрушению футеровки аппарата.Heating at speeds above the upper limits of the recommended allowable speeds is not permissible, since it leads to thermal destruction of the lining of the apparatus.
Разогрев со скорост ми ниже нижних пределов рекомендуемых допустимыхWarming up at speeds below the lower limits of the recommended allowable
слcl
оabout
4 Ю4 S
слcl
скоростей нецелесообразен с точки зрени увеличени длительности процесса .speeds is impractical from the point of view of increasing the duration of the process.
Способ .учитьшает модификационные превращени , проход щие в динасе, а также термические напр жени , возникающие в отдельном кирпиче вследствие неравномерного его прогрева по длине и кирпиче как конструктивном элементе футеровки.The method studies modifying transformations occurring in the dinas, as well as thermal stresses arising in a separate brick due to its uneven heating in length and brick as a structural element of the lining.
Способ иллюстрируетс следующим примером.The method is illustrated by the following example.
Пример. Повторный разогрев воздухонагревател , футерованного в высокотемпературной зоне динасо- вым огнеупором, ведут по температуре внутренней поверхности футеровки купола по графику, предусматривающе300 С соExample. Reheating of the air heater, lined in the high-temperature zone with a dinas refractory, is conducted according to the temperature of the inner surface of the lining of the dome according to the schedule, providing for 300 S with
OfOf
му подъем температуры до скоростью , от 300 до 500°СMu rise in temperature to a speed of 300 to 500 ° C
т:сt: s
соwith
fm twofm two
10001000
т воо тt voot t
600- 500 400 300600- 500 400 300
гоо шhoo sh
скоростью 3 с/ч.speed of 3 s / h.
от 500 до from 500 to
со скоростью 7 С/ч.at a speed of 7 S / h.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874308885A SU1504254A1 (en) | 1987-07-21 | 1987-07-21 | Method of reheating blast-furonace air-heater lined with silica brick refractory in high-temperature zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874308885A SU1504254A1 (en) | 1987-07-21 | 1987-07-21 | Method of reheating blast-furonace air-heater lined with silica brick refractory in high-temperature zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1504254A1 true SU1504254A1 (en) | 1989-08-30 |
Family
ID=21328808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU874308885A SU1504254A1 (en) | 1987-07-21 | 1987-07-21 | Method of reheating blast-furonace air-heater lined with silica brick refractory in high-temperature zone |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1504254A1 (en) |
-
1987
- 1987-07-21 SU SU874308885A patent/SU1504254A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Типова инструкци по сушке, разогреву и эксплуатации воздухонагревателей, М. : 1982, с. 18. * |
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