CN106755747A - A kind of three hole dip pipes of single-mouth refining furnace - Google Patents
A kind of three hole dip pipes of single-mouth refining furnace Download PDFInfo
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- CN106755747A CN106755747A CN201710076578.9A CN201710076578A CN106755747A CN 106755747 A CN106755747 A CN 106755747A CN 201710076578 A CN201710076578 A CN 201710076578A CN 106755747 A CN106755747 A CN 106755747A
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- hole
- refining furnace
- mouth
- rise
- mouth refining
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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Abstract
The present invention relates to a kind of three hole dip pipes of single-mouth refining furnace, including tubulose exterior wall and internal barricade, the internal barricade is T-shaped or Y-shaped structure, and tubulose exterior wall is separated to form into two area identical rise holes and a drop down hole, and the rise hole is provided with some lifting gas gas outlets.The dip pipe can increase tedge quantity under conditions of the size and vavuum pump based on existing ladle and vacuum chamber and increase tedge equivalent diameter to increase circular flow, reduce the interference for rising molten steel and declining molten steel, improve refining efficiency, and the support strength in internal barricade centre can be strengthened, extend the life-span of dip pipe, reduce the cost of resistance to material.
Description
Technical field
Vacuum degasser field the invention belongs to be used to make steel external refining in metallurgy industry, is related to a kind of single mouth essence
Three hole dip pipes of furnace.
Background technology
In external refining field, vacuum refining of liquid steel equipment mainly have RH, the device such as single-mouth refining furnace, VD.RH refers to whole
Body formula or split type vacuum chamber, when molten steel is processed, all metallurgical reactions are carried out in vacuum chamber, and the bottom of RH is two
The circular dip pipe of individual formed objects, respectively tedge and down-comer, top connection hot-bending pipe, hot-bending pipe and pumped vacuum systems
Connection, each several part is combined into a set of equipment for vacuum refining.Its operation principle is to be blown into argon gas by tedge gas outlet, while
In the presence of vacuumizing, the molten steel in ladle is driven to enter in vacuum chamber by tedge, then molten steel is led to by vacuum chamber again
Cross down-comer to return in ladle, complete a circulation for molten steel.
The restricted link of RH refinings is circulating and mixing for molten steel, no matter molten steel component and equalizing temperature,
Or the speed and effect of the purifying reactions such as degassing, decarburization, desulfurization, all associated therewith, circular flow is bigger, and molten steel is in ladle
Mixing time it is shorter, degassing decarburization when desulfurization between it is shorter.So, circular flow be reflect RH device treatment effeciencies index it
One.Computing formula on circular flow has a lot, it is contemplated that dip pipe rises pipe diameter, lifting atmospheric pressure flow and vacuum chamber
The influence of interior pressure-driven molten steel circulation, therefore it is circulated flowmeter from the formula that the most frequently used Kuwabara et al. is proposed
Calculate：
Q=11.4 × G1/3×D4/3×[ln(p1/p2)]1/3；
Wherein：G is gas supply flow (unit：NL/min)；
D is that dip pipe rises pipe diameter or equivalent diameter (unit：M, equivalent diameter be when tedge cross section it is non-circular but
Calculated close to areal calculation formula during circle by sectional area and circle)；
P1It is static pressure (unit at tedge lifting gas gas outlet：Pa)；
P2It is vacuum indoor pressure (unit：Pa).
Because the refining efficiency of molten steel can be influenceed by circular flow, circular flow is the bigger the better, from the formula,
For the ladle for determining tonnage and diameter, the approach for improving RH circular flows has：
1) increase dip pipe rises bore；
2) increase lifting throughput；
3) static pressure at increase tedge lifting gas gas outlet；
4) vacuum indoor pressure is reduced.
According to production and it was verified that but existing use RH methods vacuum circulation degassing purifier molten steel circular flow
But there is a higher limit, still have the following disadvantages：
1) when lifting throughput exceedes its saturation value in molten steel in tedge, circular flow is not further added by, and subtracts on the contrary
It is small；
2) dip pipe tedge and down-comer are both needed in insertion ladle, and the two equal diameters, and dipping pipe diameter receives ladle
Diameter is limited；
3) static pressure has individual higher limit because dip pipe insertion depth is limited at tedge lifting gas gas outlet；
4) vacuum in RH vacuum chambers has reached below 100Pa, can typically reach 50Pa, disclosure satisfy that degassing will
Ask, and continuing reduction vacuum then needs to change the vavuum pump of bigger exhaust capacity and wants more energy, loses more than gain；
5) existing RH vacuum circulation degassings purifier cannot effectively solve the problems, such as dead band in ladle.
For problem above, inspired by DH and RH, constantly there is disclosed patent to make improvements in the last few years, by DH
Single tube and RH the upper two-tube method of flowing down " single-mouth refining furnace " that combines.It is that will use RH for single-mouth refining furnace
Tedge and down-comer are merged into a single cylindrical shape or cylindroid dip pipe in the vacuum circulation degassing purifier of method.
Single-mouth refining furnace is to be blown into argon gas by ladle bottom air brick, or such as patent (application number 201320187158.5) described side
With the argon gas that lifting gas gas outlet and cross section can be blown into for single mouth dip pipe of oval cylinder by its side lifting gas gas outlet,
Or if patent (application number 201210302397.0) the ladle bottom blowing air brick is plus the circumferentially disposed lifting of single-mouth refining furnace
Gas gas outlet is blown into argon gas jointly；Molten steel is stirred by the floating of argon gas, while driving the molten steel in ladle to transport upwards
It is dynamic, and realize circulation of the molten steel between ladle, dip pipe and vacuum chamber.
Compared with using the vacuum circulation degassing purifier of RH methods, structure is simpler, argon gas bubbles for single-mouth refining furnace
Working stroke it is bigger, the circular flow of molten steel is bigger, and the temperature drop in molten steel cyclic process is small, and degassing rate is higher, but single mouth essence
Rising flow field of molten steel in furnace dip pipe and decline flow field of molten steel can also interfere, and reduce cycle efficieny, while molten steel is circulated
Flow is restricted by the ventilative situation of ladle bottom air brick, once bottom air brick gas permeability is deteriorated or blocking may result in molten steel
Internal circulating load is greatly reduced, or even molten steel cannot be circulated flowing.
Single mouth dip pipe is divided into two according to a kind of patent (application number 201420179382.4) middle barricade of band
Single-mouth refining furnace；A kind of patent (application number 201220713193.1) the Intermediate Gray inside barricade is by one point of single mouth dip pipe
It is two, while the single-mouth refining furnace of dip pipe side band lifting gas gas outlet, several patents of the above are in various degree to single mouth essence
Furnace has certain improvement, and the interference for rising molten steel and declining molten steel is reduced to a certain degree.But due in single mouth dip pipe
Inside middle dams setting position and structure and unreasonable, the molten steel flow velocity in tedge and down-comer is essentially identical, rises
, still than larger, cycle efficieny is high not enough, while inside middle barricade level is long for molten steel and the interference between declining molten steel
Degree is more long, and barricade deadweight is born in the center portion thereof position and molten steel impact power is larger, and having deformation to cave in causes single mouth dipping tube lifetime inclined
Short risk.
The content of the invention
In view of this, it is an object of the invention to provide a kind of three hole dip pipes of single-mouth refining furnace, the dip pipe can
Increase tedge quantity under conditions of the size and vavuum pump based on existing ladle and vacuum chamber and increase tedge equivalent
Diameter reduces the interference for rising molten steel and declining molten steel to increase circular flow, improves refining efficiency, and can strengthen internal barricade
The support strength in centre, extends the life-span of dip pipe, reduces the cost of resistance to material.
To reach above-mentioned purpose, the present invention provides following technical scheme：
A kind of three hole dip pipes of single-mouth refining furnace, including tubulose exterior wall and internal barricade, the internal barricade be T-shaped or
Person's Y-shaped structure, two area identical rise holes and a drop down hole are separated to form by tubulose exterior wall, and the rise hole is provided with
Some lifting gas gas outlets.
Further, the tubulose exterior wall by refractory brick, joint filling sand, inner bag and pours resistance to material and constitutes successively from the inside to the outside, institute
Internal barricade is stated to be made up of the joint filling sand and refractory brick of inner bag and inner bag both sides.
Further, on the outer circle wall of the inner bag of the tubulose exterior wall and lower curtate is provided with the anchoring for the resistance to material of hanging and pouring
Nail.
Further, the ratio between area of section of two area of section sums of rise hole and drop down hole is 1~2.
Further, each lifting gas gas outlet is 1~2 layer along the axially arranged of rise hole, and each layer lifting gas gas outlet is located at
On the same cross section of each layer of rise hole.
Further, each layer at least includes the lifting gas gas outlet cloth straggly of 2 lifting gas gas outlets, upper strata and lower floor
Put.
Further, each layer of lifting gas gas outlet, between circumferentially adjacent two liftings gas gas outlet at intervals of
0.2m~0.4m.
Further, the height of three hole dip pipe is 0.7m~1.2m.
Further, the tubulose exterior wall is cylindrical shape or oval cylinder.
The beneficial effects of the present invention are：
1) each rise hole can be increased under conditions of the main equipment size constancy for keeping existing single-mouth refining furnace
Equivalent diameter, increase circular flow, while increased rise hole relative to single rise hole drives molten steel circulation, relatively
One times of circular flow is increased in single rise hole.
2) keep in rise hole be blown into gas saturation it is constant in the case of can increase and be arranged at carrying at rise hole
Gas gas outlet quantity is risen, total lifting throughput is accordingly increased, and then increase circular flow.
3) because drop down hole horizontal sectional area is less than or equal to rise hole, the molten steel flow velocity in drop down hole exit is more than or equal to upper
The molten steel flow velocity at hole is risen, molten steel can rush at ladle bottom, reduce the molten steel with rise hole lower periphery with speed faster
Interfere, be conducive to molten steel circulating in ladle and be well mixed, reduce ladle circulation dead band.
4) barrier wall structure for forming T-shaped or Y shape by three pieces of internal barricades forms mutually branch to internal barricade centre
Support, effectively raises the support strength in barricade centre, it is to avoid collapses under the deformation of barricade centre and caves in, extends dipping
Tube lifetime.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carries out
Explanation：
Fig. 1 is three hole dip pipe structural representations of single-mouth refining furnace of the present invention, is also Fig. 3 along C-C sectional views；
Fig. 2 is Fig. 1 along Section A-A figure；
Fig. 3 is Fig. 1 along section B-B figure.
In figure：1 is rise hole I, and 2 is rise hole II, and 3 is drop down hole, and 4 is inner bag, and 5 is lifting gas gas outlet, and 6 is cast
Resistance to material, 7 is anchor studs, and 8 is joint filling sand, and 9 is refractory brick, and 10 is lifting gas pipeline, and 11 is dip pipe inner bag top flange, and 12 are
Vacuum chamber.
Specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
The present invention is applied in the transformation of the RH stoves dip pipe of 150T and vacuum chamber, the vacuum chamber of the RH and dip pipe synchronization
Transformed, be changed to columnar single mouth formula structure.Concrete structure as shown in Figure 1, Figure 2 and Figure 3.The dip pipe is cylindrical shape
Single pore structure of mouth formula three, three faces inside barricade and outer arcuate exterior wall are collectively forming rise hole I 1, rise hole II 2, drop down hole 3,
Rise hole I 1 and the periphery of inner wall of rise hole II 2 are equipped with one layer of lifting gas gas outlet 5, lifting gas gas outlet 5 and lifting gas pipeline
10 UNICOMs.On the periphery wall of inner bag 4 of tubulose exterior wall and bottom is provided with anchor studs 7, hangs over the resistance to material 6 of cast of inner bladder outer wall, inner bag 4
There is refractory brick 9 in the refractory material of inner side, there is joint filling sand 8 in the gap in inner bag 4 and refractory brick 9.Dip pipe inner bag top sets
Flange 11 is equipped with, for being connected with the bottom welding of vacuum chamber 12.It is to be engaged with the hole dip pipe of this example list mouth three, vacuum
It is made up of refractory brick inside room 12, the cylindrical housing that outside is made for steel plate, the bottom of vacuum chamber 12 is provided with what refractory brick was built into
Three pieces of internal barricades, form and rise hole I 1, rise hole II 2 and the pore structure of 3 shape identical cylindrical shape list mouth formula of drop down hole three,
The space for communicating of rise hole with dip pipe and drop down hole is formed with this.Each relevant parameter of wherein three hole dip pipes is：Leaching
Stain bore takes 1.8m, and arc exterior wall thickness is 0.275m, internal barricade thickness 0.39m, and three pieces of internal barricades form 120 ° each other
Y-shaped structure, lifting gas outlet be provided with 1 layer, away from dip pipe bottom 0.5m, be provided with altogether in two rise holes 18 lifting gas outlets
Mouthful, lifting throughput is 2000NL/min, vacuum indoor pressure 100Pa.
Can be applied to the hole dip pipe of present case three and the two-tube dip pipes of former common RH, Intermediate Gray barricade of 150T ladle sizes
Single mouth dip pipe circular flow it is as shown in table 1 below.
The hole dip pipe of table 1 three and the two-tube dip pipes of common RH, single mouth dip pipe contrast of Intermediate Gray barricade
As shown in table 1,2000NL/min is all in air-blowing quantity, when vacuum indoor pressure is all 100Pa, the leaching of the hole of this example three
The circulation flow of hot metal of stain pipe is up to 412t/min, the circulation flow of hot metal 123t/min phases with former common two-tube dip pipe
Than its circulation flow of hot metal improves 235%, the circulation flow of hot metal 307t/min phases with single mouth dip pipe of Intermediate Gray barricade
Than its circular flow increased 35%.Due to being significantly increased for circular flow, mixing time of the molten steel in ladle is by 3.7min
(the common two-tube dip pipes of RH) or 1.5min (single mouth dip pipe of Intermediate Gray barricade) are reduced to 1.1min, while can accordingly shorten
Vacuum time needed for decarburization degassing, that is to say, that apply the vacuum metling treatment of the hole dip pipe single-mouth refining furnace of this example three
Efficiency has and is significantly lifted.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment to be described in detail the present invention, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (9)
1. three hole dip pipes of a kind of single-mouth refining furnace, it is characterised in that：Including tubulose exterior wall and internal barricade, the internal gear
Wall is T-shaped or Y-shaped structure, and tubulose exterior wall is separated to form into two area identical rise holes and a drop down hole, it is described on
Rise hole and be provided with some lifting gas gas outlets.
2. three hole dip pipes of single-mouth refining furnace according to claim 1, it is characterised in that：The tubulose exterior wall by it is interior extremely
Outer by refractory brick, joint filling sand, inner bag and to pour resistance to material and constitute successively, the internal barricade is by inner bag and the joint filling sand of inner bag both sides
And refractory brick composition.
3. three hole dip pipes of single-mouth refining furnace according to claim 2, it is characterised in that：The inner bag of the tubulose exterior wall
Outer circle wall on and bottom be provided with anchor studs for the resistance to material of hanging and pouring.
4. three hole dip pipes of single-mouth refining furnace according to claim 1, it is characterised in that：Two section faces of rise hole
The ratio between area of section of product sum and drop down hole is 1~2.
5. three hole dip pipes of single-mouth refining furnace according to claim 1, it is characterised in that：The lifting gas gas outlet edge
The axially arranged of rise hole is 1~2 layer, and each layer lifting gas gas outlet is located on the same cross section of each layer of rise hole.
6. three hole dip pipes of single-mouth refining furnace according to claim 5, it is characterised in that：Each layer of lifting gas gas outlet
At least include the lifting gas gas outlet arrangement straggly of 2 lifting gas gas outlets, upper strata and lower floor.
7. three hole dip pipes of single-mouth refining furnace according to claim 6, it is characterised in that：Each layer of lifting gas outlet
Mouthful, between circumferentially adjacent two liftings gas gas outlet at intervals of 0.2m~0.4m.
8. three hole dip pipes of single-mouth refining furnace according to claim 1, it is characterised in that：The height of three hole dip pipe
It is 0.7m~1.2m to spend.
9. three hole dip pipes of single-mouth refining furnace according to claim 1, it is characterised in that：The tubulose exterior wall is cylinder
Shape or oval cylinder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076578.9A CN106755747B (en) | 2017-02-13 | 2017-02-13 | A kind of three hole dip pipes of single-mouth refining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076578.9A CN106755747B (en) | 2017-02-13 | 2017-02-13 | A kind of three hole dip pipes of single-mouth refining furnace |
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| Publication Number | Publication Date |
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| CN106755747A true CN106755747A (en) | 2017-05-31 |
| CN106755747B CN106755747B (en) | 2018-09-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863083A (en) * | 2019-12-10 | 2020-03-06 | 无锡东大汉森冶金实业有限公司 | Single-nozzle double-hole structure impregnation pipe and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204455195U (en) * | 2015-01-28 | 2015-07-08 | 绵阳市嘉炜不锈钢有限公司 | A kind of RH refining furnace soaking tub |
| CN106048142A (en) * | 2016-08-12 | 2016-10-26 | 安徽工业大学 | Truncated cone-shaped sleeve dip pipe for RH vacuum finery |
| CN206570364U (en) * | 2017-02-13 | 2017-10-20 | 中冶赛迪工程技术股份有限公司 | A kind of three hole dip pipes of single-mouth refining furnace |
-
2017
- 2017-02-13 CN CN201710076578.9A patent/CN106755747B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204455195U (en) * | 2015-01-28 | 2015-07-08 | 绵阳市嘉炜不锈钢有限公司 | A kind of RH refining furnace soaking tub |
| CN106048142A (en) * | 2016-08-12 | 2016-10-26 | 安徽工业大学 | Truncated cone-shaped sleeve dip pipe for RH vacuum finery |
| CN206570364U (en) * | 2017-02-13 | 2017-10-20 | 中冶赛迪工程技术股份有限公司 | A kind of three hole dip pipes of single-mouth refining furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863083A (en) * | 2019-12-10 | 2020-03-06 | 无锡东大汉森冶金实业有限公司 | Single-nozzle double-hole structure impregnation pipe and manufacturing method thereof |
| CN110863083B (en) * | 2019-12-10 | 2024-03-26 | 苏州东大汉森冶金实业有限公司 | Single-tube double-hole structure dip pipe and manufacturing method thereof |
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| Publication number | Publication date |
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| CN106755747B (en) | 2018-09-18 |
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