CN207577126U - A kind of ferrite rolling control system - Google Patents
A kind of ferrite rolling control system Download PDFInfo
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- CN207577126U CN207577126U CN201721755853.1U CN201721755853U CN207577126U CN 207577126 U CN207577126 U CN 207577126U CN 201721755853 U CN201721755853 U CN 201721755853U CN 207577126 U CN207577126 U CN 207577126U
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Abstract
The utility model is related to a kind of ferrite rolling control systems, belong to metallurgy industry hot-strip production equipment technology.Technical solution is：Include roughing mills（1）, tunnel heating（2）, finish rolling descaling mill（3）And mm finishing mill unit（4）, in roughing mills（1）And mm finishing mill unit（4）Between successively be equipped with tunnel heating（2）With finish rolling descaling mill（3）.Slab passes through roughing mills（1）Enter tunnel heating after roughing（2）；Pass through water cooling furnace roller（23）The upper heating Two-cuff Technique coal gas burner of top（24）With the lower heating Two-cuff Technique coal gas burner of lower section（25）Heating is carried out at the same time to the upper and lower surface of slab, heating temperature is 900 950 DEG C；Slab after heating passes through finish rolling descaling mill（3）Enter mm finishing mill unit after de-scaling（4）Carry out finish rolling.The beneficial effects of the utility model are：It is ferritic structure, and the ferrite grain size after phase transformation is uniform when can be ensured that and entering mm finishing mill unit.
Description
Technical field
The utility model is related to a kind of ferrite rolling control systems, belong to metallurgy industry hot-strip production equipment technology
Field.
Background technology
At present, in the production process of hot-strip, how using lower production cost, band of good performance is rolled out
Steel is the Main way that each production line technology promotes.Ferrite rolling has extraordinary cost advantage and market application foreground,
The production technology scheme that each strip production line all more optimizes in exploration.Currently the main technique scheme of ferrite rolling is：
（1）Then the heated stove heat of slab comes out of the stove to austenitic area and carries out roughing and finish rolling；
（2）Slab completes the operation of rolling of austenitic area in roughing mills；
（3）Intermediate base is cooled to ferrite and austenitic duplex area through cooling during rolling area；
（4）Intermediate base after cooling during rolling enters mm finishing mill unit rolling.
In said program, it is exactly cooling procedure of the intermediate base in cooling during rolling section to be most difficult to control.Since intermediate base has one
Fixed thickness during cooling water cooling is used, it is difficult to carry out the uniformity of core and surface temperature, and uses water cooling
Technical cooling speed, austenite cannot be completely converted into ferrite, so, the intermediate base after water cooling is in austenite and iron
The mixed crystal state of ferritic, and since cooldown rate is too fast, the ferrite grain size after phase transformation is not of uniform size.Containing mixed grain structure
For intermediate base after finishing mill rolling, also there is non-uniform phenomenon in final grain size, causes final performance uneven.
Utility model content
The utility model aim is to provide a kind of ferrite rolling control system, is set between roughing mills and mm finishing mill unit
Tunnel heating is put, slab both sides are carried out at the same time with heating, realizes slab austenite to ferritic transformation, it is ensured that enter essence
It is ferritic structure during milling train group, solves the problems, such as background technology.
The technical solution of the utility model is：
A kind of ferrite rolling control system includes roughing mills, tunnel heating, finish rolling descaling mill and finishing mill
Group is equipped with tunnel heating and finish rolling descaling mill successively between roughing mills and mm finishing mill unit.
The tunnel heating includes water cooling furnace roller, upper heating Two-cuff Technique coal gas burner, lower heating Two-cuff Technique coal gas and burns
Mouth and furnace body, furnace body is interior to be equipped with multiple horizontally disposed water cooling furnace rollers, and the top of water cooling furnace roller is equipped with upper heating Two-cuff Technique coal gas
Burner, the lower section of water cooling furnace roller are equipped with lower heating Two-cuff Technique coal gas burner.
The furnace body includes furnace roof, furnace wall and furnace bottom, and water cooling furnace roller is located at the middle part in furnace body, upper heating Two-cuff Technique coal gas
Burner and lower heating Two-cuff Technique coal gas burner are separately fixed on the furnace wall above water cooling furnace roller and below water cooling furnace roller.
The upper heating Two-cuff Technique coal gas burner and lower heating Two-cuff Technique coal gas burner are located at the furnace wall of furnace body both sides respectively
On.
The water cooling furnace roller is rotatablely connected with transmission mechanism.
The top of the furnace body longitudinal section is rectangle structure, and lower part is inverted trapezoidal structure.
The bottom of the furnace body is exported equipped with iron scale.
Using the utility model, during rolling, following processing step is included：
1. slab is by entering tunnel heating after roughing mills roughing；
2. pass through upper heating Two-cuff Technique coal gas burner and the lower heating Two-cuff Technique coal gas burner of lower section above water cooling furnace roller
Heating is carried out at the same time to the upper and lower surface of slab, heating temperature is 900-950 DEG C；
3. the slab after heating enters mm finishing mill unit after finish rolling descaling mill de-scaling carries out finish rolling.
Above-mentioned ferrite rolling control technique, the temperature that slab goes out tunnel heating are 850-900 DEG C.
Slab utilizes upper heating Two-cuff Technique coal gas burner and lower heating Two-cuff Technique coal gas burner pair in tunnel heating
The upper and lower surface of slab is carried out at the same time heating, and heating temperature is maintained in the range of 950-900 DEG C, in such a temperature environment
It is interior, it can mutually become ferrite completely, and fire box temperature is uniform by the austenite structure of roughing mills heavy reduction rolling,
Slab time enough can be given to carry out samming, reduce the section temperature difference.In addition, slab can keep one in tunnel heating
The fixed time provides time enough to phase transformation, ensures that austenite structure mutually becomes ferrite completely, in this way, slab is come out of the stove
After enter back into mm finishing mill unit and be achieved that ferrite rolling.
The beneficial effects of the utility model are：Tunnel heating is set between roughing mills and mm finishing mill unit, to plate
Base both sides are carried out at the same time heating, realize slab austenite to ferritic transformation, it is ensured that into being ferrite group during mm finishing mill unit
It knits, and the ferrite grain size after phase transformation is uniform.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the utility model tunnel heating longitudinal sectional view；
Fig. 3 is the utility model tunnel heating transverse sectional view；
In figure：Roughing mills 1, tunnel heating 2, finish rolling descaling mill 3, mm finishing mill unit 4, furnace roof 21, furnace wall 22, water cooling
Furnace roller 23, upper heating Two-cuff Technique coal gas burner 24, lower heating Two-cuff Technique coal gas burner 25, converter body support steelframe 26, furnace bottom 27, stove
Body 28.
Specific embodiment
Below in conjunction with attached drawing, by example, the utility model is described in further detail.
With reference to attached drawing 1, a kind of ferrite rolling control system includes roughing mills 1, tunnel heating 2, finish rolling de-scaling
Machine 3 and mm finishing mill unit 4 are equipped with tunnel heating 2 and finish rolling descaling mill 3 successively between roughing mills 1 and mm finishing mill unit 4.
In the present embodiment, with reference to attached drawing 2,3, the tunnel heating 2 includes water cooling furnace roller 23, upper heating Two-cuff Technique
Coal gas burner 24, lower heating Two-cuff Technique coal gas burner 25 and furnace body 28, furnace body 28 include furnace roof 21, furnace wall 22 and furnace bottom 27, stove
The top of 28 longitudinal section of body is rectangle structure, and lower part is inverted trapezoidal structure, and the bottom of furnace body 28 is exported equipped with iron scale, stove
Middle part in body 28 is equipped with multiple horizontally disposed water cooling furnace rollers 23, and the top of water cooling furnace roller 23 is equipped with upper heating Two-cuff Technique coal gas
Burner 24, the lower section of water cooling furnace roller 23 are equipped with lower heating Two-cuff Technique coal gas burner 25, and water cooling furnace roller 23 connects with transmission mechanism rotation
It connects, upper heating Two-cuff Technique coal gas burner 24 and lower heating Two-cuff Technique coal gas burner 25 are respectively provided at 23 top of water cooling furnace roller and water cooling
23 lower section of furnace roller, lower heating Two-cuff Technique coal gas burner 25 are fixed on the furnace wall of 23 transmission side of water cooling furnace roller, upper heating Two-cuff Technique
Coal gas burner 24 is fixed on the furnace wall of fore side.
Upper heating Two-cuff Technique coal gas burner 24 and lower heating Two-cuff Technique coal gas burner 25 use coal gas, air Two-cuff Technique side
Formula improves the thermal efficiency.
During rolling, following processing step is included：
1. slab is by entering tunnel heating 2 after 1 roughing of roughing mills；
2. pass through the upper heating Two-cuff Technique coal gas burner 24 of 23 top of water cooling furnace roller and the lower heating Two-cuff Technique coal gas of lower section
Burner 25 is carried out at the same time the upper and lower surface of slab heating, and heating temperature is 900-950 DEG C；
3. the slab after heating enters mm finishing mill unit 4 after 3 de-scaling of finish rolling descaling mill carries out finish rolling.
Using tunnel heating 2 by carrying out concurrent heating to slab upper and lower surface, upper heating Two-cuff Technique coal gas burner is utilized
24 and lower heating Two-cuff Technique coal gas burner 25 pulse combustion technology discontinuity unlatching burning and heat accumulation function, pulse-combustion
Sequence is ranked up using automatic control system according to certain rule, and the temperature in furnace body is made to be maintained in the range of 900-950 DEG C,
And ensure the tapping temperature of slab at 850-900 DEG C.It, can be with by the pulse-combustion temperature control technique of centre tunnel formula heating furnace 2
Ensure slab core and the temperature uniformity on surface, and in such a temperature environment, by roughing mills heavy reduction
The austenite structure of rolling can mutually become ferrite completely, and fire box temperature is uniform, can give slab time enough into
Row samming reduces the section temperature difference.In addition, slab can be kept for the regular hour in tunnel heating, provided to phase transformation
Time enough ensures that phase transformation is completed.
Claims (7)
1. a kind of ferrite rolling control system, it is characterised in that include roughing mills（1）, tunnel heating（2）, finish rolling removes
Squama machine（3）And mm finishing mill unit（4）, in roughing mills（1）And mm finishing mill unit（4）Between successively be equipped with tunnel heating（2）With
Finish rolling descaling mill（3）.
2. a kind of ferrite rolling control system according to claim 1 is put, it is characterised in that the tunnel heating
（2）Include water cooling furnace roller（23）, it is upper heating Two-cuff Technique coal gas burner（24）, it is lower heating Two-cuff Technique coal gas burner（25）And furnace body
（28）, furnace body（28）It is interior to be equipped with multiple horizontally disposed water cooling furnace rollers（23）, water cooling furnace roller（23）To be equipped with upper heating double for top
Heat-storing coal-gas burner（24）, water cooling furnace roller（23）Lower section be equipped with it is lower heating Two-cuff Technique coal gas burner（25）.
A kind of 3. ferrite rolling control system according to claim 2, it is characterised in that the furnace body（28）Include stove
Top（21）, furnace wall（22）And furnace bottom（27）, water cooling furnace roller（23）It is located at furnace body（28）Interior middle part, upper heating Two-cuff Technique coal gas are burnt
Mouth（24）With lower heating Two-cuff Technique coal gas burner（25）It is separately fixed at water cooling furnace roller（23）Top and water cooling furnace roller（23）Lower section
Furnace wall（22）On.
A kind of 4. ferrite rolling control system according to claim 3, it is characterised in that the upper heating Two-cuff Technique coal
Gas burner（24）With lower heating Two-cuff Technique coal gas burner（25）It is located at furnace body respectively（28）The furnace wall of both sides（22）On.
A kind of 5. ferrite rolling control system according to Claims 2 or 3, it is characterised in that the water cooling furnace roller（23）
It is rotatablely connected with transmission mechanism.
A kind of 6. ferrite rolling control system according to claim 2, it is characterised in that the furnace body（28）Longitudinal section
Top for rectangle structure, lower part is inverted trapezoidal structure.
A kind of 7. ferrite rolling control system according to claim 6, it is characterised in that the furnace body（28）Bottom
It is exported equipped with iron scale.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721755853.1U CN207577126U (en) | 2017-12-15 | 2017-12-15 | A kind of ferrite rolling control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721755853.1U CN207577126U (en) | 2017-12-15 | 2017-12-15 | A kind of ferrite rolling control system |
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| CN207577126U true CN207577126U (en) | 2018-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107876564A (en) * | 2017-12-15 | 2018-04-06 | 唐山全丰薄板有限公司 | A kind of ferrite rolling control device and its control technique |
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2017
- 2017-12-15 CN CN201721755853.1U patent/CN207577126U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107876564A (en) * | 2017-12-15 | 2018-04-06 | 唐山全丰薄板有限公司 | A kind of ferrite rolling control device and its control technique |
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