CN105132624B - Online refining technology of molten steel - Google Patents
Online refining technology of molten steel Download PDFInfo
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- CN105132624B CN105132624B CN201510669900.XA CN201510669900A CN105132624B CN 105132624 B CN105132624 B CN 105132624B CN 201510669900 A CN201510669900 A CN 201510669900A CN 105132624 B CN105132624 B CN 105132624B
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Abstract
The invention discloses an online refining technology of molten steel. The online refining technology of the molten steel comprises the technological processes of draining sand filling of a hollow steel ladle, primary melting furnace tapping, online argon blowing, steel ladle conveying, molten steel refining and the like. Two or three molten steel conveying lines are converged into one line through an intersected turnout, an inverted-V-shaped molten steel conveying line or a molten steel conveying line shaped like the Chinese character 'ge' is formed, the inverted-V-shaped molten steel conveying line or the molten steel conveying line shaped like the Chinese character 'ge' is communicated with a tapping station of the primary melting furnace and two or three refining stations of a refining furnace, a steel ladle vehicle carries a steel ladle to operate between the tapping position and the refining positions, one primary melting furnace corresponds to two to three refining stations online, and continuous, compact, dynamic and orderly online refining technology processes of the molten steel are achieved. Due to the crossed molten steel conveying lines, a crown block is not used for lifting molten steel, the online refining technology for molten steel is achieved, waiting of the steel ladle is reduced, the interference of the crown block is eradicated, the circulation period of the steel ladle is shortened by 20-30 min, the tapping temperature of molten steel is lowered by 10-15 DEG C, the construction cost is saved, and the operation cost and the production cost are reduced.
Description
Technical field
The invention belongs to technical field of metallurgy industry, more particularly to a kind of online refinery practice of molten steel.
Background technology
In steelmaking process, logistics in production procedure, information flow and energy supply just refine-are refined, be related to a large amount of
Continuous and departure process variable, variable factor is more in itself for production unit, and causes that its process is extremely complex.New Generation Steel
Process requirements iron and steel enterprise uses the rational technological process of production and system configuration, and based on setting up, continuous, compact, dynamic is orderly
Scheme, the matching of stove machine and logistics transportation in flow are the premises that flow is set up.
In existing just refining-refining flow, refinery practice mainly has following both of which：
1) offline refinery practice
In traditional first refining-refining flow, using this technique, just furnace is tapped into steel ladle, on molten steel supply line
Molten steel hired car carry steel ladle and transport to refining across, overhead traveling crane handling molten steel and run to the refining of refining furnace, refining furnace
It is the double refining position forms of a set of main equipment, the molten steel after refining treatment is hoisted to next procedure by overhead traveling crane again.Sky after casting
Bag is hoisted to hot repair or cold repair station by overhead traveling crane.Because of No overtaking and certainty in many overhead traveling crane existence positions, and overhead traveling crane
Interfere, the molten steel stand-by period is long, temperature drop is big, invest larger.
2) the online refinery practice of single-station
The starting point of the pattern is waited to reduce molten steel allocation and transportation, is improved just refining-refining flow continuity and is used
Pattern.Molten steel supply line i.e. just under furnace is linearly set, and directly passes to the refining position of refining furnace, and refining furnace is a set of main body
Tables of equipment refines position form, and after just furnace tapping, molten steel hired car is carry steel ladle and directly transported molten steel by molten steel supply line
The refining position of refining furnace is transported to, remaining is with offline refinery practice.During this mode operation, day is not used in refined molten steel transportation
Car, reduces overhead traveling crane interference and molten steel is waited, but refining furnace is only single refining position, and refining cycle (TRefining) and non-cutting time
(TAuxiliary) sum less than first furnace smelting cycle (TJust refining) when, i.e. (TRefining)+(TAuxiliary) ＜ (TJust refining), could realize refining work online
Often refining cycle (T in skill, but actual productionRefining) and non-cutting time (TAuxiliary) sum more than first furnace smelting cycle (TJust refining),
And a bar steel water transport line is only set, and cannot now meet rhythmical continuous production, cause the production disruption of steelshop.
Therefore, how refining at the beginning of Optimal improvements-refining production procedure, it is ensured that whole steelshop production procedure is continuous, smooth
While, the molten steel stand-by period can be reduced again, reduce temperature drop, it is of the invention basic to reduce engineering and integrally invest with operating cost
Starting point.
The content of the invention
It is an object of the invention to provide a kind of online refinery practice of molten steel, refining furnace uses refining more than a set of main equipment
Position form, and connect multiple refining positions of the just tapping position of furnace and refining furnace respectively by cross one another molten steel supply line,
Steel ladle car is walked between tapping position and refining position, eliminates overhead traveling crane, accelerates steel ladle turnover, and thing is shortened to greatest extent
Stream transport, smooth operation, investment saving, operating cost reduction.
To achieve the above object, a kind of concrete technical scheme of the online refinery practice of molten steel of the invention is：
A kind of online refinery practice of molten steel, comprises the following steps：Molten steel hired car carries empty steel ladle to filling stuffing sand position
Filling sand is carried out to steel ladle slide gate nozzle, is run to the tapping position wait tapping of first furnace after filling sand, molten steel is via first furnace
Tapping hole is tapped into steel ladle, wherein, just furnace is arranged in just refining span centre, and just furnace is provided with a tapping position；Molten steel is hired a car
After the full Baogang's water running of carrying carries out preliminary treatment to on-line argon-blow station (or CAS-OB refinings position), according to each of refining furnace
Refining position ruuning situation, molten steel hired car directly transports steel ladle to the idle refining position of refining furnace along molten steel supply line, with to steel
Water carries out refining treatment, wherein, refining furnace is arranged in refining span centre, and refining furnace is provided with least two refinings position, just the one of furnace
Individual tapping position is connected by molten steel supply line with multiple refining positions of refining furnace respectively；The empty steel ladle being poured can basis
Service condition selects cold repair or hot repair trend, and is fixed to correspondingly cold repair or hot repair region by overhead traveling crane handling sky steel ladle
Steel ladle be hoisted on molten steel supply line by overhead traveling crane again；Empty steel ladle is hired a car by molten steel and is transported to just along molten steel supply line
The tapping position of furnace, waits next stove tapping.
The advantage of the online refinery practice of molten steel of the invention is：
1) by with angled, cross one another molten steel supply line, furnace at the beginning of realizing and two or more refinings
Position mutually UNICOM, the continuous production of refining becomes a reality molten steel online；
2) molten steel means of transportation is changed, rail transport is changed to by overhead traveling crane transport, from after the tapping of tapping position, be directly transported to essence
Refining position, the problems such as being disturbed with overhead traveling crane is waited in the absence of steel ladle, shortens steel ladle 20~30min service cycle, reduces molten steel
10~15 DEG C of tapping temperature；
3) molten steel transport operation is not required to configure overhead traveling crane, reduces construction investment, and steel ladle vehicle motor power is much smaller than day
Car, its operating cost is far below overhead traveling crane handling；
4) molten steel hired car can carry same steel ladle through multiple refining positions, you can realize essence without overhead traveling crane handling
The duplex treatment of refining；
5) relative to traditional refining flow, system continuity enhancing, steel ladle is accelerated service cycle, reduces in workshop
Steel ladle quantity, reduce once investment and operating cost；
6) prevent overhead traveling crane handling high-temperature molten steel to run on across interior phenomenon, realize safety in production.
Brief description of the drawings
Fig. 1 is the floor plan of the online refinery practice of molten steel of the invention；
Fig. 2 is the floor plan of molten steel of the invention another embodiment of online refinery practice.
Specific embodiment
In order to be better understood by the purpose of the present invention, structure and function, below in conjunction with the accompanying drawings, to a kind of molten steel of the invention
Online refinery practice does further detailed description.
As depicted in figs. 1 and 2, the online refinery practice of molten steel of the invention is comprised the following steps：First, steel ladle is filling draws
After quicksand, molten steel hired car carries empty steel ladle to the tapping position of first furnace and waits tapping, and molten steel goes out via the tapping hole of first furnace
In steel to steel ladle；Secondly, the full Baogang's water running of molten steel hired car carrying to on-line argon-blow station (or CAS-OB refinings position) is entered
After row preliminary treatment, each refining position ruuning situation according to refining furnace, molten steel hired car directly transports steel ladle along molten steel supply line
To the idle refining position of refining furnace, refining treatment is carried out with to molten steel；Then, the empty steel ladle being poured can be according to using feelings
Condition selects cold repair or hot repair trend, and by overhead traveling crane handling sky steel ladle to correspondingly cold repair or hot repair region, the molten steel fixed
Bag is hoisted on molten steel supply line by overhead traveling crane again；Finally, empty steel ladle is hired a car by molten steel and is transported to just along molten steel supply line
The tapping position of furnace, waits next stove tapping.
Further, just furnace be arranged in just refining span centre, just furnace be provided with one tapping position, refining furnace be arranged in refining across
In, refining furnace is provided with two refining positions, and just furnace tapping position is respectively by molten steel supply line and two essences of refining furnace
Refining position is connected.
Further, molten steel supply line is in " people " font, and two bar steel water transport line infalls are intersecting track switch, " people " font
The tapping position of head and first furnace is connected, and the bottom of " people " font refines positions and is connected with two of refining furnace respectively, steel ladle from
After the tapping hole of first furnace fills with molten steel, can be hired a car by molten steel and be optionally transported to refining along the molten steel supply line of " people " font
The idle refining position of stove.
Further, the head of the molten steel supply line of " people " font extends through the bottom of just furnace, to form circuit of slagging tap,
Slag in first furnace can be transported by circuit of slagging tap.
It should be noted that the molten steel supply line in above-described embodiment is two, but it is not limited only to two, to ensure molten steel
Online refining, need to be according to smelting cycle (being refined at the beginning of T), the non-cutting time (T of first furnaceAuxiliary) and refining furnace refining cycle (TRefining)
Relation, following adjustment is done to molten steel supply line：
(1) T is worked asJust refining≤TRefining+TAuxiliary≤2×TJust refiningWhen, refining furnace is both needed to configure double refining positions, i.e., first furnace and double refining positions
Refining furnace matching production, if two bar steel water transport lines；
(2) as 2 × TJust refining≤TRefining+TAuxiliary≤3×TJust refiningWhen, refining furnace is both needed to the refining of configuration three position, i.e., first furnace and three essences
The refining furnace matching production of position is refined, if three bar steel water transport lines；
TAuxiliary=TChe Yun+TArgon(or TCAS-OB)+TCar is sent back+TWait；
T refinings=TRefining 11(or TRefining 12)+TRefining 21(or TRefining 22)+……；
Note：TRefiningTotal refining cycle of multiple refining furnaces on-every bar steel water transport line；
TRefining 11, TRefining 21, TRefining 21, TRefining 22On-certain bar steel water transport line, a refining time for refining position；
TAuxiliaryNon-cutting time on-certain bar steel water transport line；
TChe YunOn-certain bar steel water transport line, molten steel hired car transports time of the full Baogang's water from tapping position to refining position；
TArgon(or TCAS-OB)-on-line argon-blow time or CAS-OB cycles；
TCar is sent backOn-certain bar steel water transport line, molten steel hired car transports time of the empty bag from refining position to tapping position；
TWait- molten steel is hired a car the stand-by period；
When molten steel supply line is three, that is, " individual " Zee bar steel Z water transport line is formed, its bottom can extend through multiple cloth
Put identical refining across, by multiple refining span centres refining furnaces be together in series, realize refining duplex treatment.
Thus, the online refinery practice of molten steel of the invention must be using the fortune of overhead traveling crane handling molten steel in changing traditional process
Defeated mode, so as to there is no the problem that overhead traveling crane interference and molten steel are waited, improve the continuous production and stability of steelshop.
As shown in figure 1, it is the first embodiment of the online refinery practice of molten steel of the invention.In the present embodiment, including one
Refined at the beginning of individual across 100 and a refining across 200.
Specifically, furnace 101 at the beginning of is disposed with 100 is just refined, just furnace 101 is provided with a tapping position 102.Its
In, just furnace can be converter commonly used in the art or electric furnace etc..
Further, refining is arranged in parallel with just refining across 200 across 100, and refining is disposed with a refining furnace 201 in 200, essence
Furnace 201 is provided with the refining position 203 of the first refining position 202 and second.
Further, just the tapping position 102 of furnace 101 passes through the first molten steel supply line 301 and the first of refining furnace 201 respectively
Refining position 202 is connected, and is connected with the second refining position 203 of refining furnace 201 by the second molten steel supply line 302.Wherein,
Molten steel hired car 400 is provided with one molten steel supply line 301 and the second molten steel supply line 302, molten steel hired car 400 can be along the first molten steel
The molten steel supply line 302 of supply line 301 and second is walked, with smart with the first of refining furnace 201 in the tapping position 102 of first furnace 101
The steel ladle 500 for containing molten steel is transported between the refining position 203 of refining position 202 and second.
Further, two bar steel water transport lines intersect setting, crosspoint 303 be located at first furnace 101 and refining furnace 201 it
Between, and near first furnace 101 tapping position 102 set, molten steel hired car 400 can in the conversion line of intersecting track switch 303 in crosspoint,
To lead to different refining positions.Specifically, in the present embodiment, the first molten steel supply line 301 and the phase of the second molten steel supply line 302
It is in " people " font to hand over, and the tapping position 102 of the head and first furnace 101 of " people " font is connected, the bottom of " people " font respectively with
First refining position 202 of refining furnace 201 is connected with the second refining position 203.
Further, the first molten steel supply line 301 and the second molten steel supply line 302 use broad gauge, and gauge and rail type
Number all same, sets intersecting track switch at the crosspoint 303 of two bar steel water transport lines, molten steel hired car 400 can be existed by intersecting track switch
Conversion line between two bar steel water transport lines.Wherein, molten steel hired car 400 is transported in the first molten steel supply line 301 and the second molten steel
Driven by alternating-current variable frequency motor on line 302, and weighing device is both provided with every molten steel hired car 400.
Further, the first molten steel supply line 301 and the second molten steel supply line 302 going out in crosspoint 303 and first furnace 101
A circuit is merged into part between steel position 102, and can be oppositely extending and by first furnace 101 across 200 relative to refining
Bottom, as the circuit of slagging tap of first furnace 101.
Further, it is provided with on-line argon-blow station 103 (or CAS-OB) between tapping position 102 and intersecting track switch 303.It is empty
When steel ladle 500 is by on-line argon-blow station 103, filling stuffing sand is carried out in this position, the molten steel hired car 400 after filling stuffing sand
Open to tapping position and wait tapping；When the steel ladle 500 for filling with molten steel is transported to on-line argon-blow station 103, carry out on-line argon-blow or
The first refining treatments of CAS-OB.It should be noted that when 103 be CAS-OB refining, and 201 for RH refine when, scheme one can also be realized
The duplex treatment of refining.
Thus, the present invention changes molten steel means of transportation, and furnace correspondence one at the beginning of realizing by intersecting track switch
Two of refining furnace refine positions to organize production, reduce steel ladle and wait, prevented overhead traveling crane interference, shorten steel ladle operating
In the cycle, solve the problems, such as that single refining position cannot be realized refining quantity-produced online, reduced investment, operating cost is low.
As shown in Fig. 2 it is the second embodiment in the online refinery practice of molten steel of the invention.In the present embodiment, including
Refined at the beginning of one across 100 and two refinings across (200 and 600).
Specifically, furnace 101 at the beginning of is disposed with 100 is just refined, just furnace 101 is provided with a tapping position 102.
Further, two refinings are arranged in parallel with just refining across (200 and 600) across 100, and each refines the refining of span centre
The arrangement of stove (201 and 601) and refining position is all identical, i.e., each refining span centre is disposed with a refining furnace (201 and 601),
Refining furnace 201 is provided with the refining position 203 of the first refining position 202 and second, and refining furnace 601 is provided with the essence of the first refining position 602 and second
Refining position 603.
Further, the tapping position 102 for just refining the first furnace 101 in 100 passes through the first molten steel supply line 301 and essence respectively
The the first refining position 202 for refining refining furnace 201 in 200 is connected, by the second molten steel supply line 302 with two refine across
Second refining position 203 of the refining furnace 201 in 200 is connected, and molten steel supply line 301 and 302 respectively forwardly extends to refining furnace
601 the first refining position 602 and second refining position 603, the other structures in the present embodiment are identical with first embodiment,
This is no longer described in detail.
Thus, molten steel transportation system of the invention realizes two duplex treatment (such as LF essences of the refining furnace of refining span centre
Refined into RH after refining).
It should be noted that illustrate only the situation that refining furnace is double refining positions in the present embodiment, i.e. each operation time closes
System is as follows：TJust refining≤TRefining+TAuxiliary≤2×TJust refining.But this is not limited to, the refining position of refining furnace can be according to actual conditions in the present invention
Flexibly setting, the double refining positions of such as a set of main body refining furnace or three refining positions.
The present invention is further described by specific embodiment above, it should be understood that, here specifically
Description, should not be construed as the restriction to the spirit and scope of the invention, and one of ordinary skilled in the art is reading this explanation
The various modifications made to above-described embodiment after book, belong to the scope that the present invention is protected.
Claims (5)
1. the online refinery practice of a kind of molten steel, refining furnace using the double refining position forms of a set of main equipment, and by two mutually
The molten steel supply line of intersection connects the just tapping position of furnace and two of refining furnace refining positions respectively, it is characterised in that including with
Lower step：
Molten steel hired car carries empty steel ladle to filling stuffing sand position and filling sand is carried out to steel ladle slide gate nozzle, fills and run after sand to first
The tapping position of furnace waits tapping, and molten steel is tapped into steel ladle via the tapping hole of first furnace, wherein, just furnace is arranged in just
Span centre is refined, just furnace is provided with a tapping position；
Molten steel hired car carries full Baogang's water running to on-line argon-blow station and carries out preliminary treatment；
Each refining position ruuning situation according to refining furnace, molten steel hired car directly transports steel ladle to refining furnace along molten steel supply line
Free time refining position, refining treatment is carried out with to molten steel, wherein, refining furnace is arranged in refining span centre, and refining furnace is provided with two refinings
Position, just furnace tapping position is connected by molten steel supply line with two refining positions of refining furnace respectively；
The empty steel ladle being poured can select cold repair or hot repair trend according to service condition, and by overhead traveling crane handling sky steel ladle
To correspondingly cold repair or hot repair region, the steel ladle fixed is hoisted on molten steel supply line by overhead traveling crane again；
Repeat the above steps；
Wherein, molten steel supply line is in " people " word or " individual " font, the head of " people " word or " individual " font and the tapping position of first furnace
It is connected, the bottom of " people " word or " individual " font is connected with multiple refining positions of refining furnace respectively, tapping of the steel ladle from first furnace
After mouth fills with molten steel, can be hired a car by molten steel and the sky of refining furnace is optionally transported to along the molten steel supply line of " people " or " individual " font
Spare time refining position.
2. the online refinery practice of molten steel according to claim 1, it is characterised in that the molten steel fortune of " people " word or " individual " font
The head of defeated line extends through the bottom of just furnace, and to form circuit of slagging tap, just the slag in furnace can be transported by circuit of slagging tap
Go out.
3. the online refinery practice of molten steel according to claim 1, it is characterised in that the molten steel fortune of " people " word or " individual " font
The bottom of defeated line can extend through the refining of multiple arrangement identicals across the different refining furnaces of multiple refining span centres are connected
Come, realize the duplex treatment of refining.
4. the online refinery practice of molten steel according to claim 1, it is characterised in that cross one another two bar steels water transport line
Use broad gauge, and gauge and track model all same, intersection that intersecting track switch is set, molten steel hired car is existed by intersecting track switch
Conversion line between two bar steel water transport lines.
5. the online refinery practice of molten steel according to claim 1, it is characterised in that molten steel is hired a car and led on molten steel supply line
Cross in alternating-current variable frequency motor driving, and every molten steel hired car and be both provided with weighing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510669900.XA CN105132624B (en) | 2015-10-13 | 2015-10-13 | Online refining technology of molten steel |
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| CN201510669900.XA CN105132624B (en) | 2015-10-13 | 2015-10-13 | Online refining technology of molten steel |
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| CN105132624B true CN105132624B (en) | 2017-05-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105821171B (en) * | 2016-03-28 | 2017-12-15 | 中冶赛迪工程技术股份有限公司 | A kind of process for making of scale customized production |
| CN105728705A (en) * | 2016-03-28 | 2016-07-06 | 北京首钢国际工程技术有限公司 | Buggy ladle system of LF refining furnace |
| CN110257592A (en) * | 2019-05-31 | 2019-09-20 | 北京首钢国际工程技术有限公司 | A kind of single station RH method for arranging technological process of two ladle car rail junctions |
| CN115927791A (en) * | 2022-12-26 | 2023-04-07 | 中冶南方(湖南)工程技术有限公司 | LF stove is smelted with RH stove common rail |
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| CN1974795A (en) * | 2006-12-22 | 2007-06-06 | 江苏沙钢集团有限公司 | Refing steel ladle hoisting method and rotating bench unit |
| CN101333582B (en) * | 2008-07-10 | 2011-04-06 | 武汉钢铁(集团)公司 | On-line vacuum arrangement apparatus |
| CN101733399A (en) * | 2010-01-29 | 2010-06-16 | 武汉钢铁(集团)公司 | RH refining processing production line and production flow thereof |
| CN204509376U (en) * | 2015-03-23 | 2015-07-29 | 山东钢铁股份有限公司 | A kind of steel-smelting device |
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