CN109158567A - Continuous casting production even pours process constant liquis position control method - Google Patents
Continuous casting production even pours process constant liquis position control method Download PDFInfo
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- CN109158567A CN109158567A CN201811159905.8A CN201811159905A CN109158567A CN 109158567 A CN109158567 A CN 109158567A CN 201811159905 A CN201811159905 A CN 201811159905A CN 109158567 A CN109158567 A CN 109158567A
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- tundish
- molten steel
- ladle
- unit time
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- 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
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a kind of continuous casting productions even to pour process constant liquis position control method, specific steps are as follows: first ladle is placed in above tundish, the flows per unit time for making first ladle enter the molten steel of tundish is greater than the flows per unit time that molten steel flows out tundish, until after reaching tundish work liquid level, it is lowered into the flows per unit time of the molten steel of tundish, keep the flows per unit time into the molten steel of tundish identical as the molten steel outflow flows per unit time of tundish, keeps tundish constant liquid level in work liquid level；First ladle molten steel casting latter stage, other ladle is also placed in above tundish, at this point, tundish is in multiple ladles simultaneously for molten steel state；Make the equal with the molten steel outflow flows per unit time of tundish always into the sum of flows per unit time of molten steel of tundish of all ladles, tundish liquid level is kept constant.The invention can avoid the unstable problems of slag and metallurgical effect, improve steel quality.
Description
Technical field
The invention belongs to steel smelting-continuous casting technical fields, and in particular to a kind of continuous casting production even pours process constant liquis position control
Method.
Background technique
With the continuous improvement that user requires steel product quality, smelting is smaller containing inclusion size, is evenly distributed, and to steel
The clean steel that material performance is safe from harm has become the emphasis of steel-making scientific and technical research.
Continuous casting production is the transition container between ladle and crystallizer, and having reduces ferrostatic pressure, and stabilized steel stream promotees
Into the effect of nonmetallic inclusionsin steel floating and realization sequence casting.In tundish stable state casting process, liquid level is in standard
Work liquid level, and during even pouring, i.e., current one heat steel water has poured, and ladle is replaced, in the crystallizer in this period
Molten steel is mainly provided by the molten steel accumulated in tundish, and therefore, tundish liquid level can be reduced constantly, opened and poured until latter tank molten steel
Supplement molten steel enters tundish, and tundish liquid level just gradually rises again, until reaching work liquid level.Therefore, it even pours among process
Molten steel liquid level is in a process constantly gone up and down in wrapping.
Tundish liquid level during even pouring constantly is gone up and down, therefore can there are problems that following 3:
(1) molten steel is unstable in wrapping in, is chronically in lifting process, and tundish surface coverture (steel slag) is caused easily to be rolled up
Enter in molten steel, pollutes molten steel；
(2) liquid level floats up and down, and tundish molten steel constantly increases and decreases, and causes tundish metallurgy effect unstable, it is this not
Stablize and promote inclusion floating, the functions such as uniform liquid steel temperature are unfavorable for the production of clean steel by extreme influence；
(3) it having been poured in previous furnace molten steel, latter furnace molten steel is not opened also when pouring, and molten steel liquid level can be reduced constantly in tundish,
And single ladle is when even pouring, and smoothly opens latter furnace ladle to pour and requires high, opens in the short time and pours unsuccessful, then may influence casting machine
The supply of molten steel causes to stop production.
Summary of the invention
The purpose of the present invention is to provide a kind of continuous casting productions even to pour process constant liquis position control method, which can
To meet multiple ladles while cast, and multiple entrances principle identical with rate of discharge when using more ladles to tundish,
Tundish be ensure that during even pouring, liquid level is kept constant, to avoid single ladle to Tundish Connection, is changed ladle and is even poured
When, tundish liquid level constantly reduces and causes slag and the unstable problem of metallurgical effect, and when single ladle even pours, easily causes
Molten steel interrupts, and continuous casting stops the problem of pouring.
The technical scheme adopted by the invention is that:
A kind of continuous casting production even pours process constant liquis position control method, specific steps are as follows:
1), first ladle is placed in above tundish, is opened when pouring, first by first ladle for molten steel, at this point, tundish
In single ladle for molten steel state, flowed out by the flows per unit time that first ladle enters the molten steel of tundish greater than molten steel
The flows per unit time of tundish；Tundish liquid level rises steadily, until being lowered into tundish after liquid level is made in job contract in reaching
Molten steel flows per unit time, make into tundish molten steel flows per unit time and molten steel outflow tundish unit when
Between flow it is identical, keep tundish constant liquid level work liquid level；
2), first ladle molten steel casting latter stage, other ladle is also placed in above tundish；Start to cast, this
When, tundish is in multiple ladles simultaneously for molten steel state；In the process, the list of the molten steel into tundish of all ladles
The sum of position time flow is equal with the molten steel outflow flows per unit time of tundish always, by gradually tapering up ladle bottom flow
The flows per unit time of the opening degree of slide plate, the molten steel for making first ladle enter tundish is gradually reduced, and is moved back until having poured
Out, other ladle, the method for the opening degree by being gradually increased ladle bottom slide plate make the list into the molten steel of tundish
Position time flow is gradually increased, until it is equal with the molten steel outflow flows per unit time of tundish, due to entering the steel of tundish
The sum of unit time total flow of water is equal with the molten steel outflow flows per unit time of tundish always, therefore, connects changing ladle
In continuous casting process, tundish liquid level is kept constant；
3), in other ladle molten steel casting latter stage, then other ladles are placed in above tundish, according to step 2)
Step carries out pouring operation, remains among flowing out always with molten steel into the sum of flows per unit time of molten steel of tundish
The flows per unit time of packet is equal, so recycles, and realization is entirely changed during ladle continuous casting, and tundish liquid level keeps permanent
It is fixed.
According to the above scheme, the tundish be in opened type, be up big and down small structure comprising lateral tundish backpack body and
Vertical tundish backpack body, lateral tundish backpack body are connected with vertical tundish backpack body；And lateral tundish backpack body and it is vertical in
Between packet backpack body formed T-shaped structure；
More than two inlets (steel ladle pouring position) is equipped with above the transverse direction tundish backpack body；Each tundish
Entrance corresponds to a ladle；
The vertical tundish backpack body is equipped with a tundish outlet, and tundish outlet passes through submersed nozzle and crystallization
Device connection.
According to the above scheme, the capacity of the tundish is 80-100t；The length of the transverse direction tundish backpack body is 10-
12m, width 4-5m, depth 1.0-1.2m；The structure can effectively avoid slag, improve steel quality.
The beneficial effects of the present invention are:
By keeping tundish T-shaped, and the more than two inlets (steel ladle pouring position) of setting, multiple steel can be made
It wraps while casting, using multiple entrances of tundish principle identical with rate of discharge, guarantee tundish is during even pouring, liquid
Position is kept constant, when so as to avoid single ladle-Tundish Connection, when changing ladle must by accumulating molten steel in tundish for steel,
Liquid level constantly reduces and causes slag, tundish metallurgy effect unstable, and when single ladle even pours, molten steel is easily caused to interrupt,
Continuous casting stops the problem of pouring；
When by making to flow out the unit of tundish with molten steel always into the sum of flows per unit time of molten steel of tundish
Between flow it is equal, avoid during single ladle-Tundish Connection, tundish level fluctuation when changing ladle and cause molten steel
The problem of slag, improves steel quality；
Flow out the unit time of tundish with molten steel always by the sum of the flows per unit time of molten steel for entering tundish
Flow is equal, so that company is poured process tundish liquid level and keeps constant, and avoiding tundish liquid level when changing ladle reduces, and causes centre
The unstable problem of packet metallurgical effect.
Multiple ladles are tundish supply molten steel simultaneously, increase the molten steel buffer capacity of tundish, avoid single ladle
When company pours, the rigidity being connected between ladle and tundish is big, easily causes molten steel supply discontinuity, continuous casting stops the problem of pouring.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of tundish；
Fig. 2 is the setting schematic diagram of tundish and ladle；
Fig. 3 is the connection schematic diagram of tundish and ladle, crystallizer；
Wherein, 1, tundish, 1.1, lateral tundish backpack body, 1.2, vertical tundish backpack body, 1.3, inlet,
1.4, tundish exports, 2, ladle, 3, ladle long nozzle, 4, crystallizer, 5, submersed nozzle.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Referring to figures 1-3, a kind of continuous casting production even pours process constant liquis position control method, specific steps are as follows:
1), first ladle is placed in above tundish, is opened when pouring, first by first ladle for molten steel, at this point, tundish
In single ladle for molten steel state, flowed out by the flows per unit time that first ladle enters the molten steel of tundish greater than molten steel
The flows per unit time of tundish；Tundish liquid level rises steadily, until being lowered into centre after reaching tundish work liquid level
The flows per unit time (entrance molten steel flow) of the molten steel of packet makes flows per unit time (the entrance steel into the molten steel of tundish
Water flow) it is identical as molten steel outflow flows per unit time (the tundish rate of discharge) of tundish, keep tundish constant liquid level
In work liquid level；
2), first ladle molten steel casting latter stage, other ladle is also placed in above tundish；Start to cast, this
When, tundish is in multiple ladles simultaneously for molten steel state；In the process, the list of the molten steel into tundish of all ladles
Position the sum of time flow is equal with the molten steel outflow flows per unit time of tundish always, first ladle into tundish
The flows per unit time of molten steel is gradually reduced, until removal after having poured, and other ladle enters the unit of the molten steel of tundish
Time flow is gradually increased, until it is equal with middle molten steel outflow flows per unit time (the tundish rate of discharge) of tundish, by
Flow out the unit of tundish with molten steel always in the sum of flows per unit time (entrance molten steel flow) of molten steel for entering tundish
Time flow (tundish rate of discharge) is equal, and therefore, during changing ladle continuous casting, tundish liquid level is kept constant；
3), in other ladle molten steel casting latter stage, then other ladles are placed in above tundish, according to step 2)
Step carries out pouring operation, remains into the sum of flows per unit time (entrance molten steel flow) of the molten steel of tundish always
It is equal with molten steel outflow flows per unit time (the tundish rate of discharge) of tundish, it so recycles, realizes and entirely change steel
During packet continuous casting, tundish liquid level is kept constant.
Originally in implementing, the capacity of tundish 1 is 80-100t, is in opened type, is up big and down small structure comprising horizontal
To tundish backpack body 1.1 and vertical tundish backpack body 1.2, lateral tundish backpack body 1.1 is connected with vertical tundish backpack body 1.2
It is logical；And lateral tundish backpack body 1.1 and vertical tundish backpack body 1.2 form positive T-shaped structure；The length of lateral tundish backpack body 1.1
Degree is 10-12m, width 4-5m, depth 1.0-1.2m；More than two centres are equipped with above lateral tundish backpack body 1.1
It is packed in mouth 1.3 (steel ladle pouring position)；The corresponding ladle 2 of each inlet 1.3, ladle 2 pass through ladle long nozzle 3 for steel
Water is delivered to lateral tundish backpack body 1.1；Vertical tundish backpack body 1.2 is equipped with a tundish outlet 1.4, which goes out
Molten steel in tundish is delivered to crystallizer 4 by submersed nozzle 5 by mouth 1.4.
For tundish 1 by steel shell as supporting, inner wall masonry has refractory material, plays the work that heat-insulated and resistance to molten steel corrodes
With.In the present embodiment, tundish shape is one just T-shaped, and the two sides of " T " word and T-shaped point of intersection set centre respectively
It is packed in mouth 1.3 (impact zone), goes out as shown in Figure 1, being equipped with 1 tundish in T-shaped lower end (vertical tundish backpack body 1.2)
Mouthful, molten steel is supplied to crystallizer 4.Ladle 2 is placed in basket pouring area top (1.3 top of inlet), and molten steel is by steel
Packet long nozzle 3 is sent into tundish 1, flows into " impact zone ", then from " impact zone " to tundish outlet 1.4.Ladle 2 can be independent
Be placed on a casting position, can also multiple ladles 2 be placed in casting above tundish simultaneously.
Case study on implementation 1:
The tundish that capacity is 100t, intermediate packet length 12m, width 4.5m, pool depth 1.0m, outside tundish are manufactured
For shape in just T-shaped, main body has steel shell, and inner wall masonry has refractory material, and the T-shaped top of tundish is provided with 3 and pours
Steel position, respectively 1#, 2# and 3# can accommodate 3 150 tons of ladles while cast.
It opens when pouring, it is that 15t/min fills packet with flow that 150 tons of ladle, which is initially positioned at tundish 2#, and molten steel, which is opened, to be poured, in
After packet control of export average flow rate 2.5t/min, 8min, middle inclusion quantity reaches 100t, and ladle outlet flow-reduction is to from 15t/
Min is down to 2.5t/min, at this point, tundish inlet and outlet flow is identical, middle packet liquid level maintains the position 100t, when the first tank molten steel
Remaining 10t, the second tank molten steel enter 1# casting position, open and pour flow control in 2t/min, meanwhile, the first tank molten steel flow is reduced to
0.5t/min is entirely changed during ladle continuous casting, tundish liquid level remains constant until casting is completed.
Case study on implementation 2:
Capacity is the T-shaped tundish of 100t, is provided with 3 and pours steel position, respectively 1#, 2# and 3#.It opens when pouring, it is double
150 tons of ladle is initially positioned at tundish 1# and 3#, and molten steel, which is opened, to be poured, and double ladles are that 7.5t/min fills packet with flow, middle to wrap out
After mouth control average flow rate 2.5t/min, 8min, middle inclusion quantity reaches 100t, and ladle outlet flow-reduction is dropped to from 7.5t/min
To 1.25t/min, at this point, tundish inlet and outlet flow is identical, middle packet liquid level maintains the position 100t, and current 2 tank molten steel is remaining
10t, the second tank molten steel enter 2# casting position, open and pour flow control in 1.5t/min, meanwhile, preceding 2 tank molten steel flow is reduced to
0.5t/min is entirely changed during ladle continuous casting until casting is completed, and inlet and outlet flow is identical, and tundish liquid level is always
It keeps constant.
Claims (5)
1. a kind of continuous casting production even pours process constant liquis position control method, it is characterised in that specific steps are as follows:
1), first ladle is placed in above tundish, is opened when pouring, first by first ladle for molten steel, at this point, at tundish
In single ladle for molten steel state, it is greater than in molten steel outflow by the flows per unit time that first ladle enters the molten steel of tundish
Between the flows per unit time that wraps；Tundish liquid level rises steadily, until being lowered into tundish after reaching tundish work liquid level
Molten steel flows per unit time, make into tundish molten steel flows per unit time and molten steel outflow tundish unit when
Between flow it is identical, keep tundish constant liquid level work liquid level；
2), first ladle molten steel casting latter stage, other ladle is also placed in above tundish；Start to cast, at this point, in
Between packet in multiple ladles simultaneously for molten steel state；In the process, all ladles into the molten steel of tundish unit when
Between the sum of flow it is equal with the molten steel outflow flows per unit time of tundish always, the molten steel into tundish of first ladle
Flows per unit time be gradually reduced, until removal after having poured, and other ladle enters the unit time of the molten steel of tundish
Flow is gradually increased, until it is equal with the middle molten steel outflow flows per unit time of tundish, due to the molten steel into tundish
The sum of flows per unit time is equal with the molten steel outflow flows per unit time of tundish always, therefore, is changing ladle continuous casting
In the process, tundish liquid level is kept constant；
3), in other ladle molten steel casting latter stage, then other ladles are placed in above tundish, the step of according to step 2
Pouring operation is carried out, remains into the sum of flows per unit time of molten steel of tundish and flows out tundish with molten steel always
Flows per unit time is equal, so recycles, and realization is entirely changed during ladle continuous casting, and tundish liquid level is kept constant.
2. continuous casting production according to claim 1 even pours process constant liquis position control method, it is characterised in that: the centre
Packet is in opened type, is up big and down small structure comprising lateral tundish backpack body and vertical tundish backpack body, lateral tundish packet
Body is connected with vertical tundish backpack body；
More than two inlets are equipped with above the transverse direction tundish backpack body；The corresponding steel of each inlet
Packet；
The vertical tundish backpack body is equipped with a tundish outlet, and tundish outlet is connected by submersed nozzle and crystallizer
It connects.
3. continuous casting production according to claim 2 even pours process constant liquis position control method, it is characterised in that: laterally intermediate
Packet backpack body and vertical tundish backpack body form T-shaped structure.
4. continuous casting production according to claim 2 or 3 even pours process constant liquis position control method, it is characterised in that: laterally
The length of tundish backpack body is 10-12m, width 4-5m, depth 1.0-1.2m.
5. continuous casting production according to claim 4 even pours process constant liquis position control method, it is characterised in that: the centre
The capacity of packet is 80-100t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811159905.8A CN109158567A (en) | 2018-09-30 | 2018-09-30 | Continuous casting production even pours process constant liquis position control method |
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| CN201811159905.8A CN109158567A (en) | 2018-09-30 | 2018-09-30 | Continuous casting production even pours process constant liquis position control method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216260A (en) * | 2019-06-19 | 2019-09-10 | 武汉钢铁有限公司 | The method of Cleanliness of Molten Steel is improved in continuous casting process |
| CN110751893A (en) * | 2019-10-30 | 2020-02-04 | 苏州大学 | Steelmaking full-flow simulation experiment system and method |
| CN111570744A (en) * | 2020-04-26 | 2020-08-25 | 中冶南方连铸技术工程有限责任公司 | Pouring device and pouring method of continuous casting machine |
| CN111922311A (en) * | 2020-07-24 | 2020-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Tundish liquid level control method in continuous casting production process |
| CN114619006A (en) * | 2022-02-14 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Method for controlling inclusions in pipeline steel during ladle replacement |
| CN115138832A (en) * | 2021-03-29 | 2022-10-04 | 宝山钢铁股份有限公司 | Method for prolonging number of pure steel pouring furnaces based on molten steel weight information |
| CN118682090A (en) * | 2024-08-28 | 2024-09-24 | 北京科技大学 | Stable control method and system for molten steel temperature from ladle to tundish of continuous casting machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110216260A (en) * | 2019-06-19 | 2019-09-10 | 武汉钢铁有限公司 | The method of Cleanliness of Molten Steel is improved in continuous casting process |
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| CN111922311A (en) * | 2020-07-24 | 2020-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Tundish liquid level control method in continuous casting production process |
| CN111922311B (en) * | 2020-07-24 | 2022-04-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Tundish liquid level control method in continuous casting production process |
| CN115138832A (en) * | 2021-03-29 | 2022-10-04 | 宝山钢铁股份有限公司 | Method for prolonging number of pure steel pouring furnaces based on molten steel weight information |
| CN115138832B (en) * | 2021-03-29 | 2024-01-09 | 宝山钢铁股份有限公司 | Method for prolonging number of pure steel pouring furnaces based on molten steel weight information |
| CN114619006A (en) * | 2022-02-14 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Method for controlling inclusions in pipeline steel during ladle replacement |
| CN118682090A (en) * | 2024-08-28 | 2024-09-24 | 北京科技大学 | Stable control method and system for molten steel temperature from ladle to tundish of continuous casting machine |
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Application publication date: 20190108 |
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| RJ01 | Rejection of invention patent application after publication |