CN102127632A - Heating process of CSP (Compact Strip Production) roller-hearth soaking furnace - Google Patents
Heating process of CSP (Compact Strip Production) roller-hearth soaking furnace Download PDFInfo
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- CN102127632A CN102127632A CN 201110073536 CN201110073536A CN102127632A CN 102127632 A CN102127632 A CN 102127632A CN 201110073536 CN201110073536 CN 201110073536 CN 201110073536 A CN201110073536 A CN 201110073536A CN 102127632 A CN102127632 A CN 102127632A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 62
- 238000002791 soaking Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000010079 rubber tapping Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052742 iron Inorganic materials 0.000 abstract description 6
- 230000003139 buffering effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000005097 cold rolling Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention relates to a heating process of a CSP (Compact Strip Production) roller-hearth soaking furnace. The heating process comprises the steps of adjusting a furnace inside air coefficient, setting a furnace inside temperature, controlling a furnace inside pressure, controlling furnace retaining time and setting a heat preserving and cooling rule for rolling, and is characterized in that: during adjustment of the furnace inside air coefficient, the air coefficient of the heating section is 1.0-1.1, the air coefficient of the buffering section is 1.0-1.1, the air coefficient of the oscillating section is 1.0-1.05 and the air coefficient of the public section is 1.05-1.2; the furnace inside pressure is set according to the discharging temperature of a plate blank; the furnace inside pressure is controlled at a slight positive pressure; the furnace retaining time is between 20 minutes and 30 minutes; and the heat preserving and cooling rule for rolling is set according to rolling stop time. In the heating process, the air coefficient, inside temperature, furnace retaining time, inside pressure, heat preserving and cooling and the like of the CSP soaking furnace are defined according to the heating characteristics of the CSP roller-hearth soaking furnace, so that the generation of iron scale in the furnace is effectively suppressed, the product quality is ensured and the plate yield is increased.
Description
Technical field
The present invention relates to heating process, particularly is a kind of CSP roller bottom type soaking pit heating process.
Background technology
CSP roller bottom type soaking pit directly receives the slab from continuous caster, and slab is carried out suitable benefit temperature, soaking, is sent to milling train then and is rolled.Because slab temperature during whole soaking pit is easy to cause that all than higher oxidization burning loss is too high, often cause in the stove slab lower surface to scratch that iron scale is pressed into defective in the defective and the operation of rolling.
A kind of method of the CSP of minimizing cold-rolling galvanization plate surface imperfection is disclosed among the ZL200710134109.4.This method mainly is that the iron scale that forms after the slab oxidation is removed, and does not fundamentally reduce the oxidation growing amount of slab.
The short flow process heating process of a kind of continuously cast bloom is disclosed among the ZL96119469.3.This method is primarily aimed at the die casting of traditional heating stove, the heating process when continuously cast bloom loads in mixture heating, and is moulded into domestic substantially superseded at present.
A kind of processing method of CSP thin slab cold rolling feeding is disclosed among the ZL200610048369.5.This method waits and reaches the purpose that improves cold rolling material mechanical property by regulation tapping temperature, finishing temperature, the temperature of curling, milling train draft, and this method does not relate to stove internal heating technology, does not more reduce the oxidization burning loss of slab.
The heating process that reduces oxidization burning loss in the bar plate heating stove mentioned in " process furnace oxidization burning loss reason and Analysis of Countermeasure " literary composition in " the metallurgical energy " second phase in 2004, but its at be traditional heater for rolling steel, and inapplicable CSP roller bottom type soaking pit.
In sum, at present still therefore needleless, designs that a kind of effectively to suppress the CSP roller bottom type soaking pit heating process that iron scale generates in the stove very necessary to the ripe heating process of CSP roller hearth type heating furnace.
Summary of the invention
The purpose of this invention is to provide a kind of CSP roller bottom type soaking pit heating process that can effectively suppress iron scale generation in the stove.
For achieving the above object, the present invention adopts following technical scheme: a kind of CSP roller bottom type soaking pit heating process comprises temperature setting in furnace air coefficient adjustment, the stove, furnace pressure control, time inside furnace and preserving temperature and reducing temperature system to be rolled:
Described furnace air coefficient adjustment, heating zone are 1.0～1.1, and breeze way is 1.0～1.1, and wobble segment is 1.0～1.05, and common segment is 1.05～1.2;
Temperature is set according to the slab tapping temperature in the described stove, and wherein common segment, wobble segment temperature are higher 20～40 ℃ than slab tapping temperature, and the breeze way temperature is higher 20～40 ℃ than wobble segment temperature, and the heating zone temperature is higher 20～40 ℃ than breeze way temperature;
Described furnace pressure is controlled at pressure-fired, is 5～10Pa during ordinary production wherein; When stopping rolling cooling is 10～15Pa;
Described time inside furnace is 20～30min;
Described preserving temperature and reducing temperature system to be rolled is as follows:
When stopping the time of rolling when being 10～30min, tapping back 10min begins to heat up, and the temperature of heating zone, breeze way, wobble segment, common segment is controlled at respectively than low 10～20 ℃, 10～20 ℃, 10 ℃, 10 ℃ of desired temperature in the stove;
When stopping the time of rolling when being 0.5～1h, 10min begins to heat up before the open rolling, and the temperature of heating zone, breeze way, wobble segment, common segment is controlled at respectively than low 40～50 ℃, 40 ℃, 30 ℃, 20 ℃ of desired temperature in the stove;
When stopping the time of rolling when being 1～2h, 20min begins to heat up before the open rolling, and heating zone is controlled at minimum flow rate, and the temperature of breeze way, wobble segment, common segment is controlled at 1050 ℃, 1000 ℃, 1000 ℃ respectively;
When stopping the time of rolling when being 2～5h, 2h begins to heat up before the open rolling, and heating zone is flame-out, and the temperature of breeze way, wobble segment, common segment is controlled at 850～1000 ℃, 800～1000 ℃, 800～1000 ℃ respectively;
When stopping the time of rolling is 5h when above, and 5h begins to heat up before the open rolling, and heating zone is flame-out, and the temperature of breeze way, wobble segment, common segment all is controlled at 600～800 ℃.
Further, described furnace air coefficient adjustment, heating zone are 1.02～1.1, and breeze way is 1.02～1.1, and wobble segment is 1.02～1.05, and common segment is 1.1～1.2.
Further, described common segment, wobble segment temperature are higher 20～30 ℃ than slab tapping temperature, and the breeze way temperature is higher 20～30 ℃ than wobble segment temperature, and the heating zone temperature is higher 20～30 ℃ than breeze way temperature.
Further, described furnace air coefficient adjustment, heating zone is 1.1, breeze way is 1.1, wobble segment is 1.05, and common segment is 1.15, and described common segment, wobble segment temperature are higher 20 ℃ than slab tapping temperature, the breeze way temperature is higher 20 ℃ than wobble segment temperature, and the heating zone temperature is higher 20 ℃ than breeze way temperature.
Further, be 9Pa during described furnace pressure ordinary production.
Further, described time inside furnace is 28min.
The present invention is directed to CSP roller bottom type soaking pit heating characteristics, by temperature, time inside furnace, furnace pressure and preserving temperature and reducing temperature to be rolled etc. in the air coefficient of CSP soaking pit, the stove are defined, effectively suppress the generation of iron scale in the stove, guaranteed quality product, improved lumber recovery.
Embodiment
The present invention is described in further detail below in conjunction with specific embodiment, but this embodiment should not be construed as limitation of the present invention.
Embodiment 1
A kind of CSP roller bottom type soaking pit heating process comprises temperature setting in furnace air coefficient adjustment, the stove, furnace pressure control, time inside furnace and preserving temperature and reducing temperature system to be rolled:
Described furnace air coefficient adjustment, heating zone are 1.0～1.1, and breeze way is 1.0～1.1, and wobble segment is 1.0～1.05, and common segment is 1.05～1.2;
Temperature is set according to the slab tapping temperature in the described stove, and wherein common segment, wobble segment temperature are higher 20～40 ℃ than slab tapping temperature, and the breeze way temperature is higher 20～40 ℃ than wobble segment temperature, and the heating zone temperature is higher 20～40 ℃ than breeze way temperature;
Described furnace pressure is controlled at pressure-fired, is 5～10Pa during ordinary production wherein; When stopping rolling cooling is 10～15Pa;
Described time inside furnace is 20～30min;
Described preserving temperature and reducing temperature system to be rolled is as follows:
When stopping the time of rolling when being 10～30min, tapping back 10min begins to heat up, and the temperature of heating zone, breeze way, wobble segment, common segment is controlled at respectively than low 10～20 ℃, 10～20 ℃, 10 ℃, 10 ℃ of desired temperature in the stove;
When stopping the time of rolling when being 0.5～1h, 10min begins to heat up before the open rolling, and the temperature of heating zone, breeze way, wobble segment, common segment is controlled at respectively than low 40～50 ℃, 40 ℃, 30 ℃, 20 ℃ of desired temperature in the stove;
When stopping the time of rolling when being 1～2h, 20min begins to heat up before the open rolling, and heating zone is controlled at minimum flow rate, and the temperature of breeze way, wobble segment, common segment is controlled at 1050 ℃, 1000 ℃, 1000 ℃ respectively;
When stopping the time of rolling when being 2～5h, 2h begins to heat up before the open rolling, and heating zone is flame-out, and the temperature of breeze way, wobble segment, common segment is controlled at 850～1000 ℃, 800～1000 ℃, 800～1000 ℃ respectively;
When stopping the time of rolling is 5h when above, and 5h begins to heat up before the open rolling, and heating zone is flame-out, and the temperature of breeze way, wobble segment, common segment all is controlled at 600～800 ℃.
Embodiment 2
In the scheme of embodiment 1 record, described furnace air coefficient adjustment, heating zone are 1.02～1.1, and breeze way is 1.02～1.1, and wobble segment is 1.02～1.05, and common segment is 1.1～1.2.
Embodiment 3
In the scheme of embodiment 2 record, described common segment, wobble segment temperature are higher 20～30 ℃ than slab tapping temperature, and the breeze way temperature is higher 20～30 ℃ than wobble segment temperature, and the heating zone temperature is higher 20～30 ℃ than breeze way temperature.
Embodiment 4
In the scheme of embodiment 3 records, described furnace air coefficient adjustment, heating zone is 1.1, breeze way is 1.1, wobble segment is 1.05, and common segment is 1.15, and described common segment, wobble segment temperature are higher 20 ℃ than slab tapping temperature, the breeze way temperature is higher 20 ℃ than wobble segment temperature, and the heating zone temperature is higher 20 ℃ than breeze way temperature.
Embodiment 5
In the scheme of embodiment 4 record, be 9Pa during described furnace pressure ordinary production.
Embodiment 6
In the scheme of embodiment 5 records, described time inside furnace is 28min.
The content that is not described in detail in this specification sheets belongs to the those skilled in the art known prior art.
Claims (6)
1. a CSP roller bottom type soaking pit heating process comprises temperature setting in furnace air coefficient adjustment, the stove, furnace pressure control, time inside furnace and preserving temperature and reducing temperature system to be rolled, it is characterized in that:
Described furnace air coefficient adjustment, heating zone are 1.0～1.1, and breeze way is 1.0～1.1, and wobble segment is 1.0～1.05, and common segment is 1.05～1.2;
Temperature is set according to the slab tapping temperature in the described stove, and wherein common segment, wobble segment temperature are higher 20～40 ℃ than slab tapping temperature, and the breeze way temperature is higher 20～40 ℃ than wobble segment temperature, and the heating zone temperature is higher 20～40 ℃ than breeze way temperature;
Described furnace pressure is controlled at pressure-fired, is 5～10Pa during ordinary production wherein; When stopping rolling cooling is 10～15Pa;
Described time inside furnace is 20～30min;
Described preserving temperature and reducing temperature system to be rolled is as follows:
When stopping the time of rolling when being 10～30min, tapping back 10min begins to heat up, and the temperature of heating zone, breeze way, wobble segment, common segment is controlled at respectively than low 10～20 ℃, 10～20 ℃, 10 ℃, 10 ℃ of desired temperature in the stove;
When stopping the time of rolling when being 0.5～1h, 10min begins to heat up before the open rolling, and the temperature of heating zone, breeze way, wobble segment, common segment is controlled at respectively than low 40～50 ℃, 40 ℃, 30 ℃, 20 ℃ of desired temperature in the stove;
When stopping the time of rolling when being 1～2h, 20min begins to heat up before the open rolling, and heating zone is controlled at minimum flow rate, and the temperature of breeze way, wobble segment, common segment is controlled at 1050 ℃, 1000 ℃, 1000 ℃ respectively;
When stopping the time of rolling when being 2～5h, 2h begins to heat up before the open rolling, and heating zone is flame-out, and the temperature of breeze way, wobble segment, common segment is controlled at 850～1000 ℃, 800～1000 ℃, 800～1000 ℃ respectively;
When stopping the time of rolling is 5h when above, and 5h begins to heat up before the open rolling, and heating zone is flame-out, and the temperature of breeze way, wobble segment, common segment all is controlled at 600～800 ℃.
2. CSP roller bottom type soaking pit heating process according to claim 1, it is characterized in that: described furnace air coefficient adjustment, heating zone are 1.02～1.1, and breeze way is 1.02～1.1, and wobble segment is 1.02～1.05, and common segment is 1.1～1.2.
3. CSP roller bottom type soaking pit heating process according to claim 1 and 2, it is characterized in that: described common segment, wobble segment temperature are higher 20～30 ℃ than slab tapping temperature, the breeze way temperature is higher 20～30 ℃ than wobble segment temperature, and the heating zone temperature is higher 20～30 ℃ than breeze way temperature.
4. CSP roller bottom type soaking pit heating process according to claim 3, it is characterized in that: described furnace air coefficient adjustment, heating zone is 1.1, breeze way is 1.1, wobble segment is 1.05, and common segment is 1.15, and described common segment, wobble segment temperature are higher 20 ℃ than slab tapping temperature, the breeze way temperature is higher 20 ℃ than wobble segment temperature, and the heating zone temperature is higher 20 ℃ than breeze way temperature.
5. CSP roller bottom type soaking pit heating process according to claim 4 is characterized in that: during described furnace pressure ordinary production is 9Pa.
6. CSP roller bottom type soaking pit heating process according to claim 5, it is characterized in that: described time inside furnace is 28min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110073536 CN102127632A (en) | 2011-03-24 | 2011-03-24 | Heating process of CSP (Compact Strip Production) roller-hearth soaking furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110073536 CN102127632A (en) | 2011-03-24 | 2011-03-24 | Heating process of CSP (Compact Strip Production) roller-hearth soaking furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557554A (en) * | 2017-09-19 | 2018-01-09 | 南京钢铁股份有限公司 | A kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108394A (en) * | 2007-08-22 | 2008-01-23 | 马鞍山钢铁股份有限公司 | Method of sheet billet continuously casting and rolling to produce thin strip steel coil |
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2011
- 2011-03-24 CN CN 201110073536 patent/CN102127632A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108394A (en) * | 2007-08-22 | 2008-01-23 | 马鞍山钢铁股份有限公司 | Method of sheet billet continuously casting and rolling to produce thin strip steel coil |
Non-Patent Citations (1)
| Title |
|---|
| 《工业加热》 20101231 刘占增等 CSP板坯加热工艺的优化 第43-45页 1-6 第39卷, 第5期 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557554A (en) * | 2017-09-19 | 2018-01-09 | 南京钢铁股份有限公司 | A kind of normalizing process of automobile shafts class bar roller bottom type annealing furnace |
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Application publication date: 20110720 |