CN104673977A - Startup warming method of continuous annealing furnace containing non-oxidation section silicon steel - Google Patents
Startup warming method of continuous annealing furnace containing non-oxidation section silicon steel Download PDFInfo
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- CN104673977A CN104673977A CN201510068554.XA CN201510068554A CN104673977A CN 104673977 A CN104673977 A CN 104673977A CN 201510068554 A CN201510068554 A CN 201510068554A CN 104673977 A CN104673977 A CN 104673977A
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- Prior art keywords
- oxidation
- silicon steel
- annealing furnace
- continuous annealing
- oxidation section
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a startup warming method of a continuous annealing furnace containing non-oxidation section silicon steel and belongs to the field of silicon steel thermal treatment. The method is characterized in that the temperature of each heating area of the non-oxidation furnace is controlled to 950-1000 DEG C, the afterburning air flow is 1.1-1.4 times of the theoretical perfect combustion quantity demand, and the volume concentration of hydrogen in the annealing furnace protective gas is not less than 20%. The method is safe, rapid and effective to operate, and is suitable for the continuous annealing furnace production line containing the non-oxidation section silicon steel. The method has the advantages of reducing the startup preparation, reducing the consumption of the process preparation material and avoiding the generation of the non-oxidation watermark on the surface of the first roll strip steel and the oxidation stain on the surface of the strip steel produced by the continuous annealing furnace containing the non-oxidation section silicon steel.
Description
Technical field
The invention belongs to silicon steel Field of Heat-treatment, be specifically related to a kind of containing non-oxidation section silicon steel continuous annealing furnace cycling start temperature-rising method.
Background technology
Along with cold rolled silicon steel product production capacity surplus, the market requirement not only requires the excellence of silicon steel product magnetic property and stablizes, what more value is the over-all properties (comprising the aspects such as magnetic property, mechanical property, surface quality, thickness and precision) of product, and especially the requirement of Surface Quality is more and more strict.Coal gas direct combustion heating band steel due to what take containing self sign-oxidation-free annealer of non-oxidation silicon steel continuous annealing furnace, the overall atmosphere of non-oxidation furnace is weak oxide simultaneously, easily cause cycling start first roll silicon steel coil to produce non-oxidation watermark or surface oxidation table look, become a great problem produced containing non-oxidation silicon steel continuous annealing unit.
Shortcoming at home containing non-oxidation silicon steel continuous annealing unit conventional ramp produces working method is: 1. the Operational preparation time is long.2. the usage quantity of technological preparation adjustment material is wasted.3. the defect such as the watermark of first roll strip steel head non-oxidation or surface oxidation variable color.
Summary of the invention
The object of this working method is to provide and operates quick, safety, effectively heating mode, avoids cycling start intensification rear surface of silicon steel generation mass defect.
technical solution of the present invention:
A kind of containing non-oxidation silicon steel continuous annealing furnace temperature-rising method, it comprises oxidation-free annealer Heating temperature, energy medium flow control scope, it is characterized in that:
1. each Heating Zone Temperature of non-oxidation furnace controls at 950-1000 DEG C, and each heating zone coal gas, air flow quantity are stablized, and supplemental combustion air flow is 1.1-1.4 times of theoretically complete combustion demand;
2. in annealing furnace protective gas body, hydrogen volume concentration is not less than 20%.
Namely described energy medium is coal gas, air.
The present invention is applicable to containing non-oxidation silicon steel continuous annealing furnace production line.Its operational safety, quick, effectively, reduce simultaneously cycling start prepare, reduce technological preparation adjustment material consumption, can avoid producing non-oxidation watermark, belt steel surface oxidation stain at the first roll belt steel surface produced containing the cycling start of non-oxidation silicon steel continuous annealing furnace.
Embodiment
During the warming temperature of oxidation-free annealer heating zone, first open the primary air valve of each heating zone, under auto state, set 500-700m
3/ h, then every section of given minimum burning of gas flow, reach respective air after set(ting)value until gas flow and beat as tandem, then progressively increase each section of gas flow, makes each heating zone gas flow increase 50-100m than gas flow needed for normal process temperature
3/ h, supplemental combustion air is set as the 1.1-1.4 of theoretically complete combustion demand doubly;
Stove to be annealed each heating zone minimum temperature reaches 760 DEG C, starts to pass into hydrogen, and hydrogen intake is 1.2-1.5 times of normal process set amount.The each heating zone of non-oxidation furnace is warmed up to 950-1000 DEG C, and in annealing furnace protective gas body, hydrogen volume concentration is not less than 20%, and all the other each heating zones of annealing furnace reach corresponding trade mark normal process requirement temperature range simultaneously, normally can produce silicon steel.
Claims (1)
1. containing a non-oxidation silicon steel continuous annealing furnace temperature-rising method, it is characterized in that: each Heating Zone Temperature of non-oxidation furnace controls at 950-1000 DEG C, supplemental combustion air flow is 1.1-1.4 times of theoretically complete combustion demand; In annealing furnace protective gas body, hydrogen volume concentration is not less than 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510068554.XA CN104673977A (en) | 2015-02-10 | 2015-02-10 | Startup warming method of continuous annealing furnace containing non-oxidation section silicon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510068554.XA CN104673977A (en) | 2015-02-10 | 2015-02-10 | Startup warming method of continuous annealing furnace containing non-oxidation section silicon steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104673977A true CN104673977A (en) | 2015-06-03 |
Family
ID=53309559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510068554.XA Pending CN104673977A (en) | 2015-02-10 | 2015-02-10 | Startup warming method of continuous annealing furnace containing non-oxidation section silicon steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104673977A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5591943A (en) * | 1978-12-29 | 1980-07-11 | Nippon Steel Corp | Continuous annealing method for cold rolled steel strip |
| JPS5929651B2 (en) * | 1978-06-02 | 1984-07-21 | 新日本製鐵株式会社 | Heat treatment method for steel strip |
| JPH0121204B2 (en) * | 1985-07-18 | 1989-04-20 | Nippon Kokan Kk | |
| CN102268516A (en) * | 2010-06-07 | 2011-12-07 | 鞍钢股份有限公司 | Decarburization and annealing process of high-carbon middle-and-low-grade cold rolling orientation-free silicon steel |
| CN103103467A (en) * | 2013-01-25 | 2013-05-15 | 河北钢铁股份有限公司邯郸分公司 | Temperature control method of hot-rolled thick-specification galvanized plate heating furnace |
-
2015
- 2015-02-10 CN CN201510068554.XA patent/CN104673977A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5929651B2 (en) * | 1978-06-02 | 1984-07-21 | 新日本製鐵株式会社 | Heat treatment method for steel strip |
| JPS5591943A (en) * | 1978-12-29 | 1980-07-11 | Nippon Steel Corp | Continuous annealing method for cold rolled steel strip |
| JPH0121204B2 (en) * | 1985-07-18 | 1989-04-20 | Nippon Kokan Kk | |
| CN102268516A (en) * | 2010-06-07 | 2011-12-07 | 鞍钢股份有限公司 | Decarburization and annealing process of high-carbon middle-and-low-grade cold rolling orientation-free silicon steel |
| CN103103467A (en) * | 2013-01-25 | 2013-05-15 | 河北钢铁股份有限公司邯郸分公司 | Temperature control method of hot-rolled thick-specification galvanized plate heating furnace |
Non-Patent Citations (1)
| Title |
|---|
| 刘秀飞 等: "带钢连续热镀锌退火炉预热区及无氧化加热区的热诊断", 《轧钢》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150603 |
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| RJ01 | Rejection of invention patent application after publication |