CN103451408B - A kind of method of fast quick change hydrogen after bell furnace urgency blowing - Google Patents
A kind of method of fast quick change hydrogen after bell furnace urgency blowing Download PDFInfo
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- CN103451408B CN103451408B CN201310402722.5A CN201310402722A CN103451408B CN 103451408 B CN103451408 B CN 103451408B CN 201310402722 A CN201310402722 A CN 201310402722A CN 103451408 B CN103451408 B CN 103451408B
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Abstract
A kind of method of fast quick change hydrogen after the invention provides bell furnace urgency blowing, make simulation heating cover Signal plug, establishment annealing regulation computer fast quick change hydrogen program, nitrogen purging and heating mantles are set as 0 ignition time, changing the hydrogen time is set as 12min, Atmosphere Control O
2< 1%.During fast quick change hydrogen, first unload cooling cowl Signal plug, connect simulation heating cover Signal plug; Then start heating schedule, automatically carry out changing hydrogen by setting-up time, change after hydrogen terminates and unload simulation heating cover Signal plug, and connect cooling cowl Signal plug continuation cooling.The whole hydrogen process of changing of the present invention only needs 30min, effectively can reduce surface of steel plate oxidation, improve plate surface quality, avoids the second annealing being oxidized steel plate to reprocess, greatly saves the energy, reduce production cost.
Description
Technical field
The invention belongs to cold rolled annealed technology field, particularly relate to a kind of method for quick change hydrogen fast after cold rolling hood type stove cooling stages urgency blowing.
Background technology
Full Hydrogen Bell Type Annealing Furnace annealing be using hydrogen as reducing gas at high temperature by iron oxide reduction for pure iron, simultaneously volatile emission rolls the ROLLING OIL of rear surface of steel plate, realizes the clean annealing of high-quality surface.Certain cold rolling mill bell furnace has run 23 years, equipment serious aging, therefore faults frequent, monthly because inner cover, motor leak, the urgency blowing that the fault such as oil, communicating interrupt of altering compactor causes reaches 285 times more than, wherein 236 urgency blowing stages for beginning to cool down after hanging away heating mantles.Because furnace gas after urgency blowing is nitrogen, without reductibility, and oxygen level and dew point are all higher than hydrogen, cause Oxidation of steel coil in stove.
For solving Oxidation of steel coil problem in stove, when being the urgency blowing of the cooling stages generation after hanging away heating mantles always, need again to buckle heating mantles to carry out again changing hydrogen operation, if but now do not have to heat the table terminated, do not have heating mantles to use, therefore can only wait for that the heating of other tables terminates.Through statistics, wait for that mean time of heating mantles is 1.8 hours, be equivalent to coil of strip time inside furnace and extend 1.8 hours, thus coil of strip surface in stove is caused have a strong impact on.
Through practical observation, if rapidly nitrogen replacement in stove was become hydrogen after urgency blowing within 30 minutes, after coming out of the stove, coil of strip surface is without obvious oxidation tint; If nitrogen atmosphere continues more than 50 minutes, then coil of strip will produce light blue oxidation; If nitrogen atmosphere continues more than 80 minutes, more serious mazarine oxidation will be produced.Not only directly affect the surface quality qualification rate of steel plate, and have to re-start second annealing process time serious, to eliminate the surface oxidation marking, both reduced the productive efficiency of bell furnace, be multiplied again energy consumption simultaneously.
Summary of the invention
The present invention aims to provide one can shorten coil of strip time inside furnace, reduces surface of steel plate oxidation, improves plate surface quality, avoid second annealing, the method for fast quick change hydrogen after reducing the bell furnace cooling stages urgency blowing of energy consumption.
For this reason, the solution that the present invention takes is:
After bell furnace urgency blowing, a method for fast quick change hydrogen, utilizes cover annealing computer for controlling, and its concrete grammar and step are:
1, simulation heating cover Signal plug is made;
2, work out cover annealing computer for controlling fast quick change hydrogen sequence of control, comprising:
Return 0 section, parameters; Unlock; Start nitrogen purging; The nitrogen purging time is set as 0; The accumulation nitrogen maximum purged is set as 999m
3; Changing the hydrogen time is set as 12min; Atmosphere Control O
2< 1%; Heating mantles is set as 0 ignition time;
3, fast quick change hydrogen operation after urgency blowing:
A, unload cooling cowl Signal plug;
B, connect simulation heating cover Signal plug;
C, startup heating schedule, automatically carry out changing hydrogen by setting-up time and parameter, change after hydrogen terminates and unload simulation heating cover Signal plug, and connect cooling cowl Signal plug continuation cooling.
Beneficial effect of the present invention is:
The whole hydrogen process of changing of the present invention only needs 30min, can effectively shorten coil of strip time inside furnace, reduce surface of steel plate oxidation, improve plate surface quality, the steel plate oxidation waste product caused because of cooling stages urgency blowing is reduced to 0 ton by original annual 218 tons, and stock amount is reduced to 16 tons by annual 465 tons.Meanwhile, the second annealing avoiding oxidation steel plate is reprocessed, and the annealing amount of reprocessing is reduced to 0 by 189 annual stoves, greatly saves the energy, reduces production cost.
Embodiment
After bell furnace cooling stages urgency blowing of the present invention, the method for fast quick change hydrogen mainly utilizes original cover annealing computer for controlling, and increase corresponding program realize.Its concrete grammar and step are:
1, simulation heating cover Signal plug is made.
Changing hydrogen is beginning step in cover annealing heating schedule, therefore originally also again must buckle heating mantles when cooling stages carries out changing hydrogen even without heating mantles, can restart heating schedule.Therefore, this invention takes the mode of simulation heating cover signal, the Signal plug be about on the heating mantles scrapped is unloaded down, as simulation heating cover Signal plug, to realize the startup of heating schedule.
2, work out cover annealing computer for controlling fast quick change hydrogen sequence of control, content comprises:
Return 0 section, optimum configurations;
Unlock;
Start nitrogen purging;
The nitrogen purging time is set as 0;
The accumulation nitrogen maximum purged is set as 999m
3;
Changing the hydrogen time is set as 12min;
Atmosphere Control O
2< 1%;
Heating mantles is set as 0 ignition time.
3, carry out the fast quick change hydrogen operation after urgency blowing, the steps include:
A, unload cooling cowl Signal plug.Because the furnace atmosphere after urgency blowing has been nitrogen, therefore in fast quick change hydrogen sequence of control, the nitrogen purging time is set as 0, thus the original normal nitrogen air-blowing flyback time needing 30 minutes can be eliminated.
B, connect simulation heating cover Signal plug, to enable system start and to enter heat-processed.Because heating mantles burner blower purge time is set as 0, thus the original normal burner blower purge time needing 10 minutes can be eliminated.
C, startup cover annealing computer for controlling heating schedule, carry out changing hydrogen by setting-up time 12min automatically.And namely unload simulation heating cover Signal plug changing after hydrogen terminates, and connect cooling cowl Signal plug and continue cooling.
More than change hydrogen process control within 30min, thus effectively prevent Oxidation of steel coil.
Claims (1)
1. the method for fast quick change hydrogen after bell furnace urgency blowing, utilize cover annealing computer for controlling, it is characterized in that, concrete grammar and step are:
(1) simulation heating cover Signal plug, is made;
(2), work out cover annealing computer for controlling fast quick change hydrogen sequence of control, comprising:
Return 0 section; Unlock; Start nitrogen purging; The nitrogen purging time is set as 0; The accumulation nitrogen maximum purged is set as 999m
3; Changing the hydrogen time is set as 12min; Atmosphere Control O
2< 1%; Heating mantles is set as 0 ignition time;
(3), fast quick change hydrogen operation after urgency blowing:
A, unload cooling cowl Signal plug;
B, connect simulation heating cover Signal plug;
C, startup heating schedule, automatically carry out changing hydrogen by setting-up time and parameter, change after hydrogen terminates and unload simulation heating cover Signal plug, and connect cooling cowl Signal plug continuation cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310402722.5A CN103451408B (en) | 2013-09-07 | 2013-09-07 | A kind of method of fast quick change hydrogen after bell furnace urgency blowing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310402722.5A CN103451408B (en) | 2013-09-07 | 2013-09-07 | A kind of method of fast quick change hydrogen after bell furnace urgency blowing |
Publications (2)
| Publication Number | Publication Date |
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| CN103451408A CN103451408A (en) | 2013-12-18 |
| CN103451408B true CN103451408B (en) | 2015-08-05 |
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| CN201310402722.5A Active CN103451408B (en) | 2013-09-07 | 2013-09-07 | A kind of method of fast quick change hydrogen after bell furnace urgency blowing |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105624391A (en) * | 2014-12-01 | 2016-06-01 | 鞍钢股份有限公司 | Water spraying cooling control method for bell type furnace |
| CN114921621B (en) * | 2022-06-14 | 2023-09-05 | 山西太钢不锈钢股份有限公司 | Setting method of all-hydrogen bell-type furnace hearth motor |
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2013
- 2013-09-07 CN CN201310402722.5A patent/CN103451408B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| "优化冷轧带钢退火工艺";杨学高等;《金属热处理》;19991231(第4期);第34-37页 * |
| "全氢罩式炉产生紧急吹扫的原因及预防措施";汪月松;《金属热处理》;20100331;第35卷(第3期);第98-100页 * |
| "冷轧带钢全氢罩式炉自动控制系统";梁楚荣;《装备制造技术》;20081231(第7期);第83-85、90页 * |
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| CN103451408A (en) | 2013-12-18 |
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