SU1504256A1 - Method of primary heating of blast-furnace air-heater lined with silica brick in high-temperature zone - Google Patents
Method of primary heating of blast-furnace air-heater lined with silica brick in high-temperature zone Download PDFInfo
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- SU1504256A1 SU1504256A1 SU874311752A SU4311752A SU1504256A1 SU 1504256 A1 SU1504256 A1 SU 1504256A1 SU 874311752 A SU874311752 A SU 874311752A SU 4311752 A SU4311752 A SU 4311752A SU 1504256 A1 SU1504256 A1 SU 1504256A1
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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 первый разогрев воздухонагревател , футерованного в высокотемпературной зоне муллитокорундовым огнеупором, вести по графику, предусматривающему подъем температуры внутренней поверхности футеровки купола от 200 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°С до заданной температуры со скоростью 3,8-4,2°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 first heating of the air heater lined in the high-temperature zone with mullite-corundum refractory should be carried out according to a schedule providing for the temperature rise of the inner surface of the dome lining from 200 to 300 ° C at a speed of 1.8-2.2 ° C / h, from 300 up to 500 ° С at a rate of 2.8-3.2 ° С / h, from 500 ° С to a given temperature at a rate of 3.8-4.2 ° С / 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 - повышение стойкости футеровки.The purpose of the invention is to increase the resistance of the lining.
На фиг. 1 представлен график первого разогрева воздухонагревател -, на фиг. 2 - зависимость напр жений, возникающих в футеровке в процессе разогрева.FIG. 1 is a graph of the first heating of the air heater; FIG. 2 - dependence of stresses arising in the lining in the process of heating.
Способ осуществл етс следующим образом.The method is carried out as follows.
Дл исключени преждевременного paзpyшe rи футеровки следует первый разогрев воздухонагревател , футерованного в высокотемпературной зоне муллитокорундовым огнеупором, вести по графику, предусматривающему подъемTo eliminate premature decomposition of the lining, the first heating of the air heater, lined in the high-temperature zone with mullite-corundum refractory material, should be carried out according to the schedule that provides for lifting
температуры внутренней поверхности футеровки купола от 200 до 300°С со скоростью 1,8-2,2 С/ч, от 300 йо со скоростью 2,8-3,, от 500 до заданной температуры со ско- Фостью 3,8-4,.temperatures of the inner surface of the dome lining from 200 to 300 ° C at a speed of 1.8-2.2 C / h, from 300 yo at a speed of 2.8-3 ,, from 500 to a given temperature with a speed of 3.8-4 ,
Разогрев до осуществл ют по известному способу, а именно подъем температуры от 20 до со скоростью 1,8-2,2 С/ч, вьщержка при 100°С в течение 3-3,5 сут, подъем от 100 до со скоростью 1, 3-1, 7°С/ч.Warming up is carried out by a known method, namely raising the temperature from 20 to at a speed of 1.8-2.2 S / h, holding at 100 ° C for 3-3.5 days, rising from 100 to at a speed of 1, 3-1, 7 ° 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 допустисдWarming up at speeds below the lower limits of recommended tolerances
оabout
4iib N9 СП4iib N9 SP
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мых скоростей нецелесообразен с точки зрени увеличени длительности процесса.These speeds are impractical from the point of view of increasing the duration of the process.
Способ.учитывает термические напр жени , возникающие в отдельном кирпиче вследствие неравномерного его прогрева по длине и кирпиче как конструктивном элементе футеровки.The method takes into account 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. Первый разогрев воздухонагревател , футерованного в высокотемпературной зоне муллитокорун- довым огнеупором, ведут по темпера- туре внутренней поверхности футеровки купола по графику, предусматривающему подъем температуры от 200 до со скоростью , от 300 до со скоростью , от Example. The first heating of the air heater, lined in the high-temperature zone with mullite-corundum refractory, is carried out according to the schedule of the temperature of the inner surface of the lining of the dome from 200 to at a speed from 300 to at a speed from
до заданной температуры со скоростью 4 С/ч.to the set temperature with a speed of 4 C / h.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874311752A SU1504256A1 (en) | 1987-07-21 | 1987-07-21 | Method of primary heating of blast-furnace air-heater lined with silica brick in high-temperature zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU874311752A SU1504256A1 (en) | 1987-07-21 | 1987-07-21 | Method of primary heating of blast-furnace air-heater lined with silica brick in high-temperature zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1504256A1 true SU1504256A1 (en) | 1989-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU874311752A SU1504256A1 (en) | 1987-07-21 | 1987-07-21 | Method of primary heating of blast-furnace air-heater lined with silica brick in high-temperature zone |
Country Status (1)
| Country | Link |
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| SU (1) | SU1504256A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100526778C (en) * | 2004-10-21 | 2009-08-12 | 宜兴市炉顶密封工程公司耐火保温厂 | Push plate of nitrogen kiln for sintering soft magnetic ferrite |
-
1987
- 1987-07-21 SU SU874311752A patent/SU1504256A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Типова инструкци по сушке, разогреву и эксплуатации воздухонагревателей. М.: 1982, с. 13. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100526778C (en) * | 2004-10-21 | 2009-08-12 | 宜兴市炉顶密封工程公司耐火保温厂 | Push plate of nitrogen kiln for sintering soft magnetic ferrite |
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