CN107552753B - Water distribution process of secondary cooling chamber in molten steel continuous casting process - Google Patents
Water distribution process of secondary cooling chamber in molten steel continuous casting process Download PDFInfo
- Publication number
- CN107552753B CN107552753B CN201710775549.1A CN201710775549A CN107552753B CN 107552753 B CN107552753 B CN 107552753B CN 201710775549 A CN201710775549 A CN 201710775549A CN 107552753 B CN107552753 B CN 107552753B
- Authority
- CN
- China
- Prior art keywords
- secondary cooling
- cooling chamber
- water distribution
- section
- continuous casting
- 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.)
- Active
Links
Landscapes
- Continuous Casting (AREA)
Abstract
The invention provides a water distribution process of a secondary cooling chamber in the continuous casting process of molten steel, which comprises the following steps: and (3) adopting a non-equal proportion water distribution mode, namely dividing the secondary cooling chamber into a plurality of sections, and setting specific water quantity and water distribution proportion of each section according to the pulling speed, the specification of a continuous casting machine and the casting temperature so that the surface temperatures of the casting blank at the same positions in the secondary cooling chamber are the same. The secondary cooling chamber water distribution process greatly improves the low-power quality of a cast blank, particularly a R10-meter small square billet continuous casting machine with arc shape of 150mm multiplied by 150mm, adopts the secondary cooling water distribution mode of the secondary cooling chamber, leads the internal heat conduction of the casting blank in the secondary cooling chamber to be matched with the surface heat dissipation rate under different pulling speeds, and practices prove that after the secondary cooling water distribution mode of the secondary cooling chamber is adopted, when the pulling speed is increased to be more than 2.8m/min, the defects of the low-power rating of more than 3 grades in the national standard, such as central cracks, middle cracks, shrinkage cavities and the like can be effectively avoided; the rating within the national standard level 2 can reach 95 percent.
Description
Technical Field
The invention relates to a casting process, in particular to a secondary cooling chamber water distribution process in the continuous casting process of molten steel.
Background
The continuous casting process is one of middle-end processes in the steel smelting production process, and aims to cast molten steel into qualified steel billets and provide rolled raw materials for steel rolling.
Automatic water distribution, namely setting corresponding water quantity through different pulling speeds, automatically controlling the water supply quantity of each area by a program, wherein in the traditional automatic water distribution, the proportion of each cooling section in a secondary cooling chamber is generally changed slightly, and the configuration with the same proportion is basically used at different pulling speeds; at different pulling speeds, the proportion difference of heat transferred to the surface of the casting blank from the interior of the casting blank of each section in the secondary cooling chamber is large, so that at different pulling speeds, cooling water supply with different proportions is required to be used on each section
And thirdly, dynamic water distribution, namely, theoretical water demand is calculated by program accounting through information feedback of various conditions such as casting temperature, pulling speed, surface temperature of casting blank and the like of the continuous casting machine, and water is supplied through an automatic control program.
Compared with automatic water distribution, manual water distribution is too dull and the reaction is slow; the dynamic water distribution equipment and the dynamic water distribution program are large in maintenance amount and poor in accuracy, and are still in a test development stage, and although the application of automatic water distribution is mature, the pull-up speed range capable of corresponding to the automatic water distribution is narrow.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a process for distributing water to a secondary cooling chamber during continuous casting of molten steel, which solves the above-mentioned problems of the prior art.
In order to achieve the above objects and other related objects, the present invention provides a water distribution process for a secondary cooling chamber in a continuous casting process of molten steel, comprising: the technical scheme for solving the technical problem is as follows: and (3) adopting a non-equal proportion water distribution mode, namely dividing the secondary cooling chamber into a plurality of sections, and setting specific water quantity and water distribution proportion of each section according to the pulling speed, the specification of a continuous casting machine and the casting temperature so that the surface temperatures of the casting blank at the same positions in the secondary cooling chamber are the same.
Preferably, when the billet caster specification is 150mm multiplied by 150mm, R10m arc, the tundish casting temperature is 1525 ℃, and at a drawing speed of 2.2 m/min: the second cooling chamber is divided into four sections, namely a first section, a second section, a third section and a fourth section, the specific water amount is 0.92 liter/kg, and the water distribution ratios of the first section to the fourth section are respectively 42%, 32%, 15% and 11%.
Preferably, when the billet caster specification is 150mm multiplied by 150mm, R10m arc, the tundish casting temperature is 1525 ℃, and at a drawing speed of 3.0 m/min: the second cooling chamber is divided into four sections, namely a first section, a second section, a third section and a fourth section, the specific water amount is 1.03 liter/kg, and the water distribution ratios of the first section to the fourth section are 34%, 17% and 14% respectively.
The invention relates to a secondary cooling chamber water distribution process in the continuous casting process of molten steel, which greatly improves the low-power quality of a cast blank, in particular to a R10 meter small square billet continuous casting machine with arc shape of 150mm multiplied by 150 mm.The secondary cooling water distribution mode of the invention is adopted, the internal heat derivation of the casting blank in the secondary cooling chamber is matched with the surface heat dissipation rate under different drawing speeds, and the practice proves that after the secondary cooling water distribution mode of the invention is adopted, when the drawing speed is increased to more than 2.8m/min, the defects of the low-power rating of more than 3 levels of national standard, such as central cracks, middle cracks, shrinkage cavities and the like can be effectively avoided; the rating within the national standard grade 2 can reach 95 percent, which is far higher than the technical index of 70 percent of the original water distribution mode.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Example 1: the invention provides a secondary cooling chamber water distribution process in the continuous casting process of molten steel, which comprises the following steps: the technical scheme for solving the technical problem is as follows: and (3) adopting a non-equal proportion water distribution mode, namely dividing the secondary cooling chamber into a plurality of sections, and setting specific water quantity and water distribution proportion of each section according to the pulling speed, the specification of a continuous casting machine and the casting temperature so that the surface temperatures of the casting blank at the same positions in the secondary cooling chamber are the same. The specification of the billet caster is 150mm multiplied by 150mm, R10m arc, the tundish casting temperature is 1525 ℃, at the drawing speed of 2.2 m/min: the second cooling chamber is divided into four sections, namely a first section, a second section, a third section and a fourth section, the specific water amount is 0.92 liter/kg, and the water distribution ratios of the first section to the fourth section are respectively 42%, 32%, 15% and 11%.
Example 2: the difference between the embodiment 2 and the embodiment 1 is that the drawing speed of the continuous casting machine is different, the specific water amount is different, the proportion of each section of the second cooling chamber is different, and the specific technical parameters are as follows:
the specification of the billet caster is 150mm multiplied by 150mm, R10m arc, the tundish casting temperature is 1525 ℃, at the drawing speed of 3.0 m/min: the second cooling chamber is divided into four sections, namely a first section, a second section, a third section and a fourth section, the specific water amount is 1.03 liter/kg, and the water distribution ratios of the first section to the fourth section are 34%, 17% and 14% respectively.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (1)
1. A water distribution process of a secondary cooling chamber in the continuous casting process of molten steel is characterized in that a non-equal proportion water distribution mode is adopted, namely the secondary cooling chamber is divided into a plurality of sections, and the specific water quantity and the water distribution proportion of each section are set according to the pulling speed, the specification of a continuous casting machine and the casting temperature, so that the surface temperatures of casting blanks at the same positions in the secondary cooling chamber are the same;
when the specification of the billet caster is 150mm multiplied by 150mm, R10m arc, the tundish casting temperature is 1525 ℃, and at the drawing speed of 2.2 m/min: the second cooling chamber is divided into four sections, namely a first section, a second section, a third section and a fourth section, the specific water amount is 0.92 liter/kg, and the water distribution proportion of the first section to the fourth section is 42%, 32%, 15% and 11% respectively; at a pull rate of 3.0 m/min: the second cooling chamber is divided into four sections, namely a first section, a second section, a third section and a fourth section, the specific water amount is 1.03 liter/kg, and the water distribution ratios of the first section to the fourth section are 34%, 17% and 14% respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710775549.1A CN107552753B (en) | 2017-08-31 | 2017-08-31 | Water distribution process of secondary cooling chamber in molten steel continuous casting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710775549.1A CN107552753B (en) | 2017-08-31 | 2017-08-31 | Water distribution process of secondary cooling chamber in molten steel continuous casting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107552753A CN107552753A (en) | 2018-01-09 |
| CN107552753B true CN107552753B (en) | 2020-04-17 |
Family
ID=60977789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710775549.1A Active CN107552753B (en) | 2017-08-31 | 2017-08-31 | Water distribution process of secondary cooling chamber in molten steel continuous casting process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107552753B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110293212B (en) * | 2019-07-25 | 2020-12-01 | 中冶赛迪工程技术股份有限公司 | Method for controlling secondary cooling water amount in continuous casting of small square billets under high drawing speed condition |
| CN111872339A (en) * | 2020-08-05 | 2020-11-03 | 山东莱钢永锋钢铁有限公司 | Method for continuous casting low power mass analysis |
| CN113426975B (en) * | 2021-06-15 | 2023-01-13 | 阳春新钢铁有限责任公司 | Efficient billet continuous casting water distribution secondary cooling research method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100507047C (en) * | 2006-08-31 | 2009-07-01 | 宝山钢铁股份有限公司 | Cr-Mo alloyed steel round billet produced by arc continuous casting machine and technique thereof |
| CN101983800B (en) * | 2010-11-17 | 2012-09-05 | 中冶南方工程技术有限公司 | Secondary cooling water distribution advanced control method for billet continuous casting machine |
| JP5708340B2 (en) * | 2011-07-21 | 2015-04-30 | 新日鐵住金株式会社 | Cooling method for continuous cast slab |
-
2017
- 2017-08-31 CN CN201710775549.1A patent/CN107552753B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107552753A (en) | 2018-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107552753B (en) | Water distribution process of secondary cooling chamber in molten steel continuous casting process | |
| CN103071774B (en) | Method for controlling surface temperature of casting blank at straightening point of continuous casting machine | |
| CN104399923B (en) | A kind of method producing special heavy plate continuous casting billet | |
| CN107617647B (en) | Method for producing hot-rolled strip steel with thickness less than or equal to 1.2mm by continuous casting and rolling of sheet billet | |
| CN105296853B (en) | A kind of 930MPa high-intensity fine rollings screw-thread steel and its preparation technology | |
| CN103667924B (en) | A kind of production method of 40Cr gren rod | |
| CN101138785A (en) | Continuous casting method of bloom | |
| CN107096795A (en) | A kind of manufacture method for reducing edge defects of hot rolled strip steel | |
| CN106513611A (en) | Continuous casting process for producing 450mm extremely-thick plate blank on straight arc-shaped continuous casting machine | |
| CN102151693B (en) | Method for rolling low-hardness small-sized spring steel | |
| CN101417384A (en) | Production method of low-carbon free-cutting steel | |
| CN108296463A (en) | The method for controlling the continuous casting production degree of superheat | |
| CN104372274A (en) | Processing technology for elimination of roll marks on surface of zinc-copper-nickel alloy strip | |
| CN104745925B (en) | A kind of Φ 5.3mm 72A wire rods and preparation method | |
| CN106670746A (en) | Production process of high-conductivity copper strip for transformer | |
| CN101935770B (en) | Method for manufacturing aluminum and yttrium-containing multi-element nickel-based alloy ingot blank | |
| CN103752626B (en) | The semi-automatic water-cooled of ACC is utilized to improve the production method of plate surface quality | |
| CN203044831U (en) | Novel high-strength water-cooling crystallizer | |
| CN109894593A (en) | A kind of Spraying Water of Nozzles in Secondary Cooling method based on continuous small-billet casting simulation pulling rate | |
| CN110802208B (en) | Method for adjusting water yield of continuous casting production in high-latitude area | |
| CN101972775A (en) | Method for overcoming difficulty in rolling free cutting steel | |
| CN112823965A (en) | Five-roller continuous casting machine | |
| CN104624698A (en) | Continuous roll casting technology of difficult-to-deform copper alloy plate and strip blank | |
| CN104353800A (en) | Die-casting technique for copper-alloy lamp bracket | |
| CN103567252B (en) | The manufacture craft of heavy wall copper pipe |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Water distribution technology of secondary cooling chamber in continuous casting of molten steel Effective date of registration: 20211207 Granted publication date: 20200417 Pledgee: Agricultural Bank of China Limited Qihe County sub branch Pledgor: Shandong Laigang Yongfeng Steel and Iron Co.,Ltd. Registration number: Y2021980014132 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |