CN204122708U - A kind of crystallizer cooling water control device - Google Patents
A kind of crystallizer cooling water control device Download PDFInfo
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- CN204122708U CN204122708U CN201420457681.XU CN201420457681U CN204122708U CN 204122708 U CN204122708 U CN 204122708U CN 201420457681 U CN201420457681 U CN 201420457681U CN 204122708 U CN204122708 U CN 204122708U
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- branch road
- backwater branch
- water
- backwater
- temperature
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Abstract
The utility model provides a kind of crystallizer cooling water control device, comprise continuous cast mold, the arrival end of this continuous cast mold is connected with into water main line, and the inner arc of continuous cast mold, outer arc, left side, right side connect inner arc backwater branch road, outer arc backwater branch road, left side backwater branch road, right side backwater branch road respectively; Water inlet main line is provided with the first temperature sensor for detecting inflow temperature; Inner arc backwater branch road, outer arc backwater branch road, left side backwater branch road, right side backwater branch road being respectively equipped with the second temperature sensor for detecting each branch road return water temperature, adding up the electromagnetic flowmeter of each branch road circling water flow rate, pneumatic diaphragm control valve; Calculate outer arc in crystallizer, left and right sides cooling water inflow according to factors such as steel grade, pulling rate, inflow temperature, water inlet and backwater temperature difference, molten steel overheat, casting blank cross-section sizes, the PID being realized the water yield by electromagnetic flowmeter and pneumatic control valve is regulated.During cast, improve the heat transfer of strand, reduce the incidence of blemish.
Description
Technical field
The utility model belongs to metallurgical technology field, particularly a kind of crystallizer cooling water control device.
Background technology
In casting process, molten steel enters crystallizer by tundish, is formed have certain thickness base shell by crystallizer wall cooling.Surface defect of bloom depends on the growth conditions of nascent solidified shell in crystallizer to a great extent, in crystallizer, the principal element of the nascent solidified shell growth of impact is the transmission of meniscus place hot-fluid, such as, if heat flow density is large, nascent solidified shell can be caused to grow uneven, easily produce the surface quality such as depression, longitudinal crack, transversal crack, star-like crack at casting billet surface; If heat flow density is too small, copper plate of crystallizer hot-face temperature can be caused too high, cause copper plate of crystallizer to reduce service life, and can cause the base shell of crystallizer end opening thin, easily cause the accidents such as bleed-out.Therefore, the heat transfer of the crystallization control device cooling water water yield and then control strand is the important measures reducing blemish.
For different steel grade, the strand of different section, in crystallizer, the size of heat flow density has an optimized scope, as long as ensure that the heat density of crystallizer is within the scope of this, the uniformity that initial solidification shell grows can be ensured, the thickness of crystallizer end opening base shell can be ensured out again.
At present, the crystallizer water yield mainly adjusts according to the difference of steel grade, do not consider the influence factors such as pulling rate, the degree of superheat, inflow temperature, cross dimensions, strand is made easily to produce blemish at crystallizer content, especially in the incipient stage of cast, blemish is particularly serious, adds the removing surface rate of strand.
Utility model content
For the problems referred to above, the utility model provides a kind of crystallizer cooling water control device, it is a kind of new crystallizer water rate control technology, this utility model is by the detection to water inlet branch road and backwater branch road water temperature, improving the heat transfer of strand in the water yield by controlling backwater branch road, reducing the incidence of blemish.
The utility model to achieve these goals, by the following technical solutions, a kind of crystallizer cooling water control device, comprise continuous cast mold, the arrival end of this continuous cast mold is connected with into water main line, and the inner arc of described continuous cast mold, outer arc, left side, right side connect inner arc backwater branch road, outer arc backwater branch road, left side backwater branch road, right side backwater branch road respectively;
Described water inlet main line is provided with the first temperature sensor for detecting inflow temperature;
Described inner arc backwater branch road, outer arc backwater branch road, left side backwater branch road, right side backwater branch road being respectively equipped with the second temperature sensor for detecting each branch road return water temperature, adding up the electromagnetic flowmeter of each branch road circling water flow rate, pneumatic diaphragm control valve.
Described water inlet main line is 4 water inlet branch roads, and respectively with the inner arc of continuous cast mold, outer arc, left side, right side connects, and each water inlet branch road is all provided with the first temperature sensor.
The utility model adopts technique scheme, has the following advantages: adopt the collection to water inlet and return water temperature, simultaneously to the control of each branch road water yield of backwater, the PID being realized the water yield by electromagnetic flowmeter and pneumatic control valve is regulated.During cast, improve the heat transfer of strand, reduce the incidence of blemish.
Below with reference to accompanying drawing, the utility model is described in further details.
Accompanying drawing explanation
Fig. 1 is the utility model system diagram.
Fig. 2 is the cc billet surface quality figure of embodiment 2.
Fig. 3 is the cc billet surface quality figure of comparative example.
In figure, 1, water inlet main line; 2, the first temperature sensor; 3, inner arc backwater branch road; 4, outer arc backwater branch road; 5, left side backwater branch road; 6, right side backwater branch road; 7, the second temperature sensor; 8, electromagnetic flowmeter; 9, pneumatic diaphragm control valve; 10, continuous cast mold.
Detailed description of the invention
Further a kind of crystallizer cooling water control device is described in detail below in conjunction with drawings and Examples.
Embodiment 1
A kind of crystallizer cooling water control device as shown in Figure 1, a kind of crystallizer cooling water control device, comprise continuous cast mold 10, the arrival end of this continuous cast mold 10 is connected with into water main line 1, and the inner arc of described continuous cast mold 10, outer arc, left side, right side connect inner arc backwater branch road 3, outer arc backwater branch road 4, left side backwater branch road 5, right side backwater branch road 6 respectively;
Described water inlet main line 1 is provided with the first temperature sensor 2 for detecting inflow temperature;
Described inner arc backwater branch road 3, outer arc backwater branch road 4, left side backwater branch road 5, right side backwater branch road 6 being provided with respectively all successively the second temperature sensor 7 for detecting each branch road return water temperature, adding up the electromagnetic flowmeter 8 of each branch road circling water flow rate,
Pneumatic diaphragm control valve 9; First temperature sensor 2 detects the temperature of water inlet, and the second temperature sensor 7 detects the return water temperature after continuous cast mold 10, and monitored temperature value is contrasted, and draws degree of superheat △ T; Control to the water yield when pneumatic diaphragm control valve 9 controls to pour into a mould, whether electromagnetic flowmeter 8 is used for observing water consumption is the water yield needed.
In order to calculate degree of superheat △ T accurately, the main line 1 that therefore intakes is 4 water inlet branch roads, and respectively with the inner arc of continuous cast mold 10, outer arc, left side, right side connects, and each water inlet branch road is all provided with the first temperature sensor 2.
A kind of crystallizer cooling water control method, carry out according to following steps:
1), 4 water inlet branch roads on water inlet main line 1, be respectively the inner arc of continuous cast mold 10, outer arc, left side, supply water in right side, and the first temperature sensor 2 on Zhi Jinshui branch road carries out record to the water temperature on each water inlet branch road;
2), the second temperature sensor 7 detects after continuous cast mold 10, the temperature of inner arc backwater branch road 3, outer arc backwater branch road 4, left side backwater branch road 5, right side backwater branch road 6 branch road backwater;
3) temperature that the temperature, to the first temperature sensor 2 detected and the second temperature sensor 7 detect contrasts, and calculates return water temperature and the inflow temperature degree of superheat △ T of backwater branch road;
4) water yield of backwater branch road needs, is calculated according to following computing formula;
Q＝Q
min+f*ΔQ
Q
max≤Q≤Q
min
Q
max＝10*A
Q
min＝6*A
ΔQ＝Q
max-Q
min＝4*A
f＝f
1+f
2+f
3+f
4+f
5-f
6
In formula, Q is each backwater branch road water yield; Q
maxfor each backwater branch road maximum amount of water, Q
minfor each backwater branch road least quantity; A is crystallizer inner arc, outer arc, left side or right side copper coin water seam cross-sectional area; F is comprehensive correction factor; f
1for pulling rate correction factor; f
2for steel grade correction factor; f
3for strand flakiness ratio correction factor; f
4for inflow temperature correction factor; f
5for molten steel overheat correction factor; f
6for correction factor shaped by copper coin;
In formula,
0≤f≤1
For f
1, as pulling rate 0≤v≤2m/min, f
1=0.1*v;
As pulling rate v > 2m/min, f
1=0.2
Wherein v is pulling rate, and unit is m/min;
For f
2, value is 01 ~ 0.4:
Following table is the different f of different steel grade
2value
| Steel grade | Correction factor f 2 |
| Ultra-low-carbon steel | 0.4 |
| Mild steel | 0.3 |
| Peritectic steel, low-alloy steel | 0～0.15 |
| Medium carbon steel | 0.2～0.3 |
| High-carbon steel, steel alloy | 0.1～0.2 |
For f
3, work as strand
when calculating inner arc and the outer arc backwater branch road water yield, f
3=0.15, when calculating left side and the right side backwater branch road water yield, f
3=0.1; Work as strand
when calculating inner arc and the outer arc backwater branch road water yield, f
3=0.15, when calculating left side and the right side backwater branch road water yield, f
3=0.05;
For f
4, when inflow temperature is no more than 25 DEG C, f
4=0;
When inflow temperature is more than 25 DEG C, f
4=0.15
For f
5, when the degree of superheat 15 DEG C≤△ T≤25 DEG C, f
5=0;
When the degree of superheat 25 DEG C of < △ T≤30 DEG C, f
5=0.05;
As the degree of superheat 30 DEG C of > △ T, f
5=0.1;
For f
6,
Wherein D is copper plate thickness, 15mm≤D≤40mm.
5), according to the water yield of the every bar backwater branch road calculated, by controlling pneumatic diaphragm control valve (9), realize the control to the water yield during cast, when controlling to water water injection rate, whether the data that the moment observes the display of electromagnetic flowmeter 8 are the data calculated, if not, adjust pneumatic diaphragm control valve 9 in time, make the water yield reach the value of calculating.
Embodiment 2
Based on said apparatus and method, concrete is described these apparatus and method:
1) cast casting blank section is selected to be 350mmX2100mm, steel grade Q460C, degree of superheat △ T is 30 DEG C, pulling rate is 0.6 ~ 0.8m/min, concrete value is 0.7m/min, is recorded that crystallizer inflow temperature is 35 DEG C, copper plate thickness is 40mm by the first temperature sensor 2.
2) during cast, according to step 4) in formulae discovery go out the water yield of each branch road, be specially:
Determine f
1, f
2, f
3, f
4, f
5, f
6value:
F
1for as pulling rate 0≤v≤2m/min, f
1=0.1*v=0.1*0.7=0.07;
Because the steel grade got is Q460C, therefore f
2=0.15
Strand
when therefore calculating inner arc and the outer arc backwater branch road water yield, f
3=0.15, when calculating left side and the right side backwater branch road water yield, f
3=0.1;
Recording crystallizer inflow temperature because of the first temperature sensor 2 is 35 DEG C, therefore f
4=0.15,
Degree of superheat △ T is 30 DEG C, f
5=0.05;
Determine f according to data above and according to backwater branch road maximum amount of water, backwater branch road least quantity, crystallizer inner arc, outer arc, left side or right side copper coin water seam cross-sectional area, draw the water yield of following each backwater branch road:
Inner arc backwater branch road 3 water yield is equal with outer arc backwater branch road 4 water yield, and adjustable range is: 4200l/min ~ 4650l/mim;
Left side backwater branch road 5 water yield is equal with right side backwater branch road 6 water yield, and adjustable range is: 600l/min ~ 680l/mim.
According to the water yield calculating each backwater branch road, regulating the water yield of each backwater branch road by controlling pneumatic diaphragm control valve 9, making it reach the water yield of calculating;
The water yield maybe will calculated, passes to PLC control system in real time, realizes the PID runoff investigation between electromagnetic flowmeter 8 and pneumatic diaphragm control valve 9 by PLC.
Comparative example
The cast of embodiment 2 is not adopted the real-time dynamic adjustments crystallizer water yield, is described below:
1) select cast casting blank section to be 350mmX2100mm, steel grade Q460C, the degree of superheat is 30 DEG C, pulling rate is 0.6 ~ 0.8m/min, recorded by temperature sensor 2 that crystallizer inflow temperature is 35 DEG C, copper plate thickness is 40mm.
2), during cast, two-level computer system sets a fixing water yield, is specially:
Inner arc backwater branch road 3 water yield is equal with outer arc backwater branch road 4 water yield, is set as: 4550l/min
Left side backwater branch road 5 water yield is equal with right side backwater branch road 6 water yield, is set as: 655l/min
By the water yield of setting, pass to PLC control system, realize the PID runoff investigation between electromagnetic flowmeter 8 and pneumatic diaphragm control valve 9 by PLC.
With reference to Fig. 2, Fig. 3, as can be seen from Figure 2, after implementing crystallizer water yield dynamic adjustments, strand avoids the generation of crackle, as can be seen from Figure 3, after not implementing crystallizer water yield dynamic adjustments, strand there occurs crackle, drawn by contrast, the utility model avoids or decreases the generation of slab surface crack, improves cc billet surface quality.
More than exemplifying is only illustrate of the present utility model, does not form the restriction to protection domain of the present utility model, everyly all belongs within protection domain of the present utility model with the same or analogous design of the utility model.
Claims (2)
1. a crystallizer cooling water control device, comprise continuous cast mold (10), the arrival end of this continuous cast mold (10) is connected with into water main line (1), it is characterized in that, the inner arc of described continuous cast mold (10), outer arc, left side, right side connect inner arc backwater branch road (3), outer arc backwater branch road (4), left side backwater branch road (5), right side backwater branch road (6) respectively;
Described water inlet main line (1) is provided with the first temperature sensor (2) for detecting inflow temperature;
Described inner arc backwater branch road (3), outer arc backwater branch road (4), left side backwater branch road (5), right side backwater branch road (6) are respectively equipped with the second temperature sensor (7) for detecting each branch road return water temperature, add up the electromagnetic flowmeter (8) of each branch road circling water flow rate, pneumatic diaphragm control valve (9).
2. a kind of crystallizer cooling water control device according to claim 1, it is characterized in that, described water inlet main line (1) is 4 water inlet branch roads, respectively with the inner arc of continuous cast mold (10), outer arc, left side, right side connects, and each water inlet branch road is all provided with the first temperature sensor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420457681.XU CN204122708U (en) | 2014-08-14 | 2014-08-14 | A kind of crystallizer cooling water control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420457681.XU CN204122708U (en) | 2014-08-14 | 2014-08-14 | A kind of crystallizer cooling water control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204122708U true CN204122708U (en) | 2015-01-28 |
Family
ID=52379099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420457681.XU Expired - Fee Related CN204122708U (en) | 2014-08-14 | 2014-08-14 | A kind of crystallizer cooling water control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204122708U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162638A (en) * | 2014-08-14 | 2014-11-26 | 中国重型机械研究院股份公司 | Crystallizer cooling water control device and method |
| CN106180603A (en) * | 2016-08-30 | 2016-12-07 | 中国重型机械研究院股份公司 | Magnesium alloy slab casting crystallizer |
| CN110315049A (en) * | 2019-07-25 | 2019-10-11 | 中冶赛迪工程技术股份有限公司 | A kind of continuous casting secondary cooling water control device and method |
| CN110369687A (en) * | 2019-08-02 | 2019-10-25 | 中国重型机械研究院股份公司 | A kind of intelligent apparatus and method of the online trapezoidal defect of slab section of amendment in real time |
| CN112108622A (en) * | 2018-07-11 | 2020-12-22 | 亳州易泽信息科技有限公司 | Control method of automatic control device for cold water pressure in copper processing |
-
2014
- 2014-08-14 CN CN201420457681.XU patent/CN204122708U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162638A (en) * | 2014-08-14 | 2014-11-26 | 中国重型机械研究院股份公司 | Crystallizer cooling water control device and method |
| CN106180603A (en) * | 2016-08-30 | 2016-12-07 | 中国重型机械研究院股份公司 | Magnesium alloy slab casting crystallizer |
| CN112108622A (en) * | 2018-07-11 | 2020-12-22 | 亳州易泽信息科技有限公司 | Control method of automatic control device for cold water pressure in copper processing |
| CN110315049A (en) * | 2019-07-25 | 2019-10-11 | 中冶赛迪工程技术股份有限公司 | A kind of continuous casting secondary cooling water control device and method |
| CN110315049B (en) * | 2019-07-25 | 2021-02-02 | 中冶赛迪工程技术股份有限公司 | Continuous casting secondary cooling water control device and method |
| CN110369687A (en) * | 2019-08-02 | 2019-10-25 | 中国重型机械研究院股份公司 | A kind of intelligent apparatus and method of the online trapezoidal defect of slab section of amendment in real time |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20170814 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |