CN111515356A - 240 × 240mm2Cooling process of continuous casting square billet secondary cooling water system - Google Patents
240 × 240mm2Cooling process of continuous casting square billet secondary cooling water system Download PDFInfo
- Publication number
- CN111515356A CN111515356A CN202010157163.6A CN202010157163A CN111515356A CN 111515356 A CN111515356 A CN 111515356A CN 202010157163 A CN202010157163 A CN 202010157163A CN 111515356 A CN111515356 A CN 111515356A
- Authority
- CN
- China
- Prior art keywords
- water
- steel
- secondary cooling
- continuous casting
- percent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000498 cooling water Substances 0.000 title claims abstract description 24
- 238000009749 continuous casting Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 238000005266 casting Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 229910052799 carbon Inorganic materials 0.000 claims description 18
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 15
- 238000009826 distribution Methods 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a 240 × 240mm2The cooling process of the secondary cooling water system for the continuous casting billet is that the cooling process is carried out at the original 150 × 150mm2The continuous casting 240 × 240mm is obtained by modifying the square billet section and adjusting the secondary cooling water system and the type and the position of a nozzle2The technical scheme of the square billet secondary cooling water system can effectively eliminate the defects inside and outside the casting blank and improve the operation rate of the casting machine.
Description
Technical Field
The invention relates to the technical field of metallurgical continuous casting, in particular to a continuous casting mold with the thickness of 240 × 240mm2A cooling process of a continuous casting square billet secondary cooling water system.
Background
Secondary cooling water of a continuous casting machine is an essential key link for smooth continuous casting production, and directly influences the yield of the continuous casting machine and the quality of a casting blank. The research work of continuous casting secondary cooling water distribution is carried out for many years, a great deal of work is also carried out in the field, the development of the continuous casting technology is rapidly developed, and the construction of a casting machine and the production achievement work are effective. However, for various types of continuous casting machines with different cross sections, the design of a secondary cooling process is combined with the actual production, and a reasonable secondary cooling water distribution method, a nozzle position and a nozzle type are determined, so that the method has practical significance for improving the operation rate of the casting machine, improving the continuous casting ratio and enabling the casting machine to develop towards the aim of three-high.
Disclosure of Invention
The invention aims to solve the problem that the thickness of the product is 150 × 150mm2The improvement is carried out on the basis of the square billet section, the secondary cooling water system and the model and the position of a nozzle are adjusted, and 240 × 240mm of continuous casting is provided2The process of the square billet secondary cooling water system eliminates the defects inside and outside the casting billet and improves the operation rate of the casting machine.
In order to solve the technical problems, the invention adopts the following technical scheme:
240 × 240mm2The cooling process of the secondary cooling water system for the continuous casting square billets comprises the following steps:
according to the carbon content and the alloy content of different steel grades, the principle of determining the specific water amount of the secondary cooling zone is adopted, the steel grades are classified according to the different carbon contents and are divided into 4 types:
firstly, dividing the carbon steel into plain carbon steel with the carbon content less than or equal to 0.15 percent, and adopting strong cooling;
② 0.15 percent to less than 0.25 percent of C is divided into plain carbon steel and alloy steel, and intercooling is adopted;
③ 0.25 percent to less than or equal to 0.40 percent of C is divided into plain carbon steel and alloy steel, and intercooling is adopted;
fourthly, the C is divided into plain carbon steel and alloy steel with the proportion of more than or equal to 0.40 percent, and weak cooling is adopted.
240×240mm2The front end of the crystallizer is adopted for electromagnetic stirring on the cross section, the size of the crystallizer must meet the installation requirement of an electromagnetic stirring coil, and the overall size of the electromagnetic stirring coil is phi 590 × phi 1030 × 540 mm;
for 240 × 240mm2The nozzles of the cross section are arranged as follows:
the area 1 to the area 4 sequentially comprise a 12 multiplied by 2 layer full water conical nozzle, a 4 multiplied by 5 layer air water rectangular nozzle, a 4 multiplied by 6 air water conical nozzle and a 4 multiplied by 5 air water conical nozzle.
Furthermore, the size of the copper pipe of the crystallizer is 900mm, and the drawing speed is 1.4 m/min; length of crystallizer: 900mm, water quantity of crystallizer 1000m3The temperature difference between the inlet water and the outlet water is 4-8 ℃. .
Furthermore, a water distribution monitoring picture of the continuous casting secondary cooling water system is connected with a field PLC through an industrial Ethernet, the PLC is connected with a vibration system and a control signal of a water distribution system through a network, and water distribution quantity and vibration parameters are controlled by adopting different methods according to different steel compositions, so that the quality of a casting blank is guaranteed.
Further, the full water cone nozzle is 3/8PZ3767QZ 5.
Further, the model of the air-water rectangular nozzle is PZWH38-90/45J 3.
Further, the models of the gas-water conical nozzles of the two zones are PZWH1.2-70Q2 and PZWH0.88-70Q2 respectively.
Compared with the prior art, the invention has the beneficial technical effects that:
the process can effectively eliminate the defects inside and outside the casting blank and improve the operation rate of the casting machine.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
240 × 240mm in FIG. 12The cooling nozzle position arrangement of the section is schematic.
Detailed Description
The amount of cooling water is generally dependent on the casting speed and can be determined by the following formula:
Q＝α(Av2+Bv+C)
in the formula: α — coefficient determined by experiment;
v, casting blank drawing speed;
A. b, C-a set of constants related to setting the steel grade, strand cross section and temperature of the molten steel;
obviously, the water amount is only related to the pulling speed.
According to the carbon content and the alloy content of different steel grades, the principle of determining the specific water amount of the secondary cooling zone is adopted, the steel grades are classified according to the different carbon contents and are divided into 4 types:
firstly, dividing the carbon steel into plain carbon steel with the carbon content less than or equal to 0.15 percent, and adopting strong cooling;
② 0.15 percent to less than 0.25 percent of C is divided into plain carbon steel and alloy steel, and intercooling is adopted;
③ 0.25 percent to less than or equal to 0.40 percent of C is divided into plain carbon steel and alloy steel, and intercooling is adopted;
fourthly, the C is divided into plain carbon steel and alloy steel with the proportion of more than or equal to 0.40 percent, and weak cooling is adopted.
240×240mm2The cross section adopts the head end of the crystallizer for electromagnetic stirring, the size of the crystallizer must meet the installation requirement of an electromagnetic stirring coil, the external dimension of the electromagnetic stirring coil is phi 590 × phi 1030 × 540mm, the size of a copper pipe of the crystallizer is 900mm, the pulling speed is 1.4m/min, the length of the crystallizer is 900mm, and the water quantity of the crystallizer is 1000m3The temperature difference between the inlet water and the outlet water is 4-8 ℃. The secondary cooling dynamic water distribution is the key for ensuring the stable quality of the casting blank and improving the pulling speed, ensures that the casting blank under the unsteady state condition obtains the uniform cooling condition, and reduces the temperature fluctuation of the casting blank. A water distribution monitoring picture of the continuous casting secondary cooling water system is connected with a field PLC through an industrial Ethernet, the PLC is connected with a vibration system and a control signal of a water distribution system through a network, and water distribution quantity and vibration parameters are controlled by adopting different methods according to different steel compositions, so that the quality of a casting blank is guaranteed.
For 240 × 240mm2The nozzle distance, the spray angle and the nozzle pattern of the cross section are designed, and the layout is shown in fig. 1 and table 1.
TABLE 1 nozzle types and nozzle flow requirements
The maximum flow of the gas-water conical nozzle means that when the gas pressure is 0.2-0.3 MPa, the water pressure at the maximum flow can be reduced on the premise of meeting the minimum flow of the nozzle; the minimum flow refers to that the water pressure at the minimum flow is increased to more than 0.1MPa as far as possible under the premise of meeting the maximum flow of the nozzle when the gas pressure is 0.2-0.3 MPa. The gas-water rectangular nozzle has the flow rate of 0.5MPa of maximum cooling water pressure and 0.2-0.3 MPa of air pressure.
According to the principle that the heat released by the casting blank on the solidification length is in a descending trend, according to the cooling principle that the surface temperature of the casting blank is uniform and the temperature returns to be small, the three-area distribution ratio under different specific water amounts is determined by referring to the characteristic curve of a secondary cooling nozzle and the secondary cooling configuration of the existing casting machine, and for 240 × 240mm and 240mm2A casting blank with a cross section is formed,the water quantity and specific water quantity of the cooling water are set according to the casting steel type and the temperature of the molten steel, and the parameters of the cooling water meter are set as shown in tables 2 and 3.
TABLE 2 Cooling water meter parameter settings
TABLE 3 Cooling water gauge parameter settings (II)
Wherein: the spray water meters are classified into 2 types, strong cold water meters (medium and low carbon steel) and weak cold water meters (high carbon steel).
According to the invention, on the premise of guaranteeing automatic water distribution and vibration precision, the quality and yield of the casting blank are improved to the maximum, through actual statistics and verification, three different parameter curves and section setting specific water volumes are formulated by classifying steel types according to low carbon, medium carbon and high carbon, the surface and internal quality of the casting blank is good according to the weak cooling mode, the medium cooling mode and the strong cooling mode, and the newly increased yield value of more than 2000 ten thousand per year is realized.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (3)
1. 240 × 240mm2The cooling process of the continuous casting square billet secondary cooling water system is characterized by comprising the following steps:
according to the carbon content and the alloy content of different steel grades, the principle of determining the specific water amount of the secondary cooling zone is adopted, the steel grades are classified according to the different carbon contents and are divided into 4 types:
firstly, dividing the carbon steel into plain carbon steel with the carbon content less than or equal to 0.15 percent, and adopting strong cooling;
② 0.15 percent to less than 0.25 percent of C is divided into plain carbon steel and alloy steel, and intercooling is adopted;
③ 0.25 percent to less than or equal to 0.40 percent of C is divided into plain carbon steel and alloy steel, and intercooling is adopted;
fourthly, the C is divided into plain carbon steel and alloy steel with the proportion of more than or equal to 0.40 percent, and weak cooling is adopted.
240×240mm2The front end of the crystallizer is adopted for electromagnetic stirring on the cross section, the size of the crystallizer must meet the installation requirement of an electromagnetic stirring coil, and the overall size of the electromagnetic stirring coil is phi 590 × phi 1030 × 540 mm;
for 240 × 240mm2The nozzles of the cross section are arranged as follows:
the device comprises a 12X 2 layer full-water conical nozzle, a 4X 5 layer air-water rectangular nozzle, a 4X 6 layer air-water conical nozzle and a 4X 5 layer air-water conical nozzle from a zone 1 to a zone 4 in sequence; the model of the full-water conical nozzle is 3/8PZ3767QZ5, the model of the gas-water rectangular nozzle is PZWH38-90/45J3, and the models of the gas-water conical nozzles of the two areas are PZWH1.2-70Q2 and PZWH0.88-70Q2 respectively.
2. 240 × 240mm according to claim 12The cooling process of the secondary cooling water system for the continuous casting billet is characterized in that a parabolic crystallizer with a crystallizer copper pipe size of 900mm and a drawing speed of 1.4 m/min; length of crystallizer: 900mm, water quantity of crystallizer 1000m3The temperature difference between the inlet water and the outlet water is 4-8 ℃.
3. 240 × 240mm according to claim 12The cooling process of the continuous casting square billet secondary cooling water system is characterized in that a water distribution monitoring picture of the continuous casting secondary cooling water system is connected with a field PLC through an industrial Ethernet, the PLC is connected with a vibration system and a control signal of the water distribution system through a network, and the water distribution amount and the vibration parameters are controlled by adopting different methods according to different steel compositions, so that the quality of a casting blank is guaranteed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010157163.6A CN111515356A (en) | 2020-03-09 | 2020-03-09 | 240 × 240mm2Cooling process of continuous casting square billet secondary cooling water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010157163.6A CN111515356A (en) | 2020-03-09 | 2020-03-09 | 240 × 240mm2Cooling process of continuous casting square billet secondary cooling water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111515356A true CN111515356A (en) | 2020-08-11 |
Family
ID=71900469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010157163.6A Pending CN111515356A (en) | 2020-03-09 | 2020-03-09 | 240 × 240mm2Cooling process of continuous casting square billet secondary cooling water system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111515356A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992686A (en) * | 2020-09-03 | 2020-11-27 | 福建三钢闽光股份有限公司 | Aerial fog full-water combined cooling high-carbon steel continuous casting production method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189237A (en) * | 2008-12-30 | 2011-09-21 | 内蒙古包钢钢联股份有限公司 | System integration technology for dynamic soft reduction of continuously-cast billet |
| CN107052291A (en) * | 2017-04-21 | 2017-08-18 | 抚顺新钢铁有限责任公司 | A kind of continuous casting secondary cooling water dynamic water allocation system and technique |
| CN107457378A (en) * | 2017-07-25 | 2017-12-12 | 北京科技大学 | The method that continuous casting steel billet three-dimensional dynamic water distribution water is set and controllable slighter compress is realized |
-
2020
- 2020-03-09 CN CN202010157163.6A patent/CN111515356A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189237A (en) * | 2008-12-30 | 2011-09-21 | 内蒙古包钢钢联股份有限公司 | System integration technology for dynamic soft reduction of continuously-cast billet |
| CN107052291A (en) * | 2017-04-21 | 2017-08-18 | 抚顺新钢铁有限责任公司 | A kind of continuous casting secondary cooling water dynamic water allocation system and technique |
| CN107457378A (en) * | 2017-07-25 | 2017-12-12 | 北京科技大学 | The method that continuous casting steel billet three-dimensional dynamic water distribution water is set and controllable slighter compress is realized |
Non-Patent Citations (2)
| Title |
|---|
| 王天瑶等: "240mm×240mm铸坯内部缺陷的改善", 《包钢科技》 * |
| 银志军等: "包钢6#铸机240mm×240mm断面铸坯质量研究", 《包钢科技》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992686A (en) * | 2020-09-03 | 2020-11-27 | 福建三钢闽光股份有限公司 | Aerial fog full-water combined cooling high-carbon steel continuous casting production method |
| CN111992686B (en) * | 2020-09-03 | 2021-12-17 | 福建三钢闽光股份有限公司 | Aerial fog full-water combined cooling high-carbon steel continuous casting production method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108356242B (en) | A kind of micro-alloy steel thin slab edge and corner crack control equipment and technology | |
| CA1175632A (en) | Machine for direct rolling of steel casting and producing steel product therefrom | |
| CN104162638B (en) | A kind of crystallizer cooling water control device and method | |
| CN108405818B (en) | Device and process for improving corner structure plasticity of microalloyed steel sheet billet | |
| CN111618266B (en) | Method for controlling pulling speed of small square billet | |
| CN109304432B (en) | Single-point unbalanced protection casting device for ultrathin large-size aluminum-containing steel special-shaped blank and using method | |
| JP7686296B2 (en) | Cooling method and system for controlling corner cracking in microalloyed steel slabs | |
| CN109332614B (en) | Cooling control device and method for single-point non-equilibrium casting special-shaped blank crystallizer | |
| CN108356076A (en) | A kind of continuous casting billet milling method | |
| CN111515356A (en) | 240 × 240mm2Cooling process of continuous casting square billet secondary cooling water system | |
| CN107671252A (en) | A kind of Continuous Casting Secondary Cooling system | |
| CN104999046B (en) | A kind of special-shaped billet continuous casting machine and casting for shaped blank continuous secondary cooling blows water method | |
| CN104646642A (en) | Method for controlling width size of non-oriented silicon steel continuous casting slab blank | |
| CN111014597A (en) | Cooling method and cooling device for high-pulling-speed continuous casting machine | |
| CN204770546U (en) | Abnormal shape base conticaster | |
| CN207479552U (en) | A kind of secondary cooling water of continuous casting spraying width control device | |
| CN109396409B (en) | Single-point non-equilibrium protection casting method for producing ultrathin large-size aluminum-containing steel special-shaped blank | |
| CN110052588B (en) | Microalloyed steel casting blank corner transverse crack control process and crystallizer | |
| CN219378885U (en) | A sand-type gravity casting device for seamless cast steel pipe | |
| CN1947892A (en) | Method for quick cooling of resin sand moulding castings | |
| CN1453080A (en) | Method of manufacturing large precise irregular pipe | |
| CN110369687B (en) | Intelligent device and method for online real-time correction of trapezoidal defects of slab section | |
| CN109014100A (en) | A method of it improving steel thin plate base continuous casting process and draws steel speed | |
| CN103111595A (en) | System and method for improving temperature uniformity of beam blank cross section | |
| CN207900146U (en) | A kind of efficient sand casting hybrid mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200811 |
|
| RJ01 | Rejection of invention patent application after publication |