CN106755747B - 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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- CN106755747B CN106755747B CN201710076578.9A CN201710076578A CN106755747B CN 106755747 B CN106755747 B CN 106755747B CN 201710076578 A CN201710076578 A CN 201710076578A CN 106755747 B CN106755747 B CN 106755747B
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- hole
- refining furnace
- gas outlet
- mouth
- 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
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 shapes or Y-shaped structure, tubulose exterior wall is separated to form the identical rise hole of two areas and a drop down hole, the rise hole is equipped with several promotion gas gas outlets.The dip pipe can increase tedge quantity under conditions of the size and vacuum 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 enhanced, in the service life for extending dip pipe, reduce resistance to material cost.
Description
Technical field
The invention belongs to the vacuum degasser fields for making steel external refining in metallurgy industry, are 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 devices such as single-mouth refining furnace, VD.RH refers to whole
Body formula or split type vacuum chamber, when handling molten steel, all metallurgical reactions are carried out in vacuum chamber, and the bottom of RH is two
The round dip pipe of a same size, respectively tedge and down-comer, top connect hot-bending pipe, hot-bending pipe and pumped vacuum systems
Connection, each section are combined into a set of equipment for vacuum refining.Its operation principle is to be blown into argon gas by tedge gas outlet, simultaneously
Under the action 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
It crosses down-comer to return in ladle, completes the cycle of a 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, deaerate decarburization when desulfurization between it is shorter.So circular flow be reflect RH device treatment effeciencies index it
One.Calculation formula about circular flow has very much, it is contemplated that dip pipe rises pipe diameter, promotes atmospheric pressure flow and vacuum chamber
The influence of interior pressure-driven molten steel cycle, therefore the formula that most common Kuwabara of selection et al. is proposed carries out recycle stream gauge
It calculates：
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
The areal calculation formula for passing through sectional area and circle when close to circle calculates)；
P1Static pressure (unit at gas gas outlet is promoted for tedge：Pa)；
P2For vacuum indoor pressure (unit：Pa).
Since the refining efficiency of molten steel can be influenced by circular flow, circular flow is the bigger the better, by the formula it is found that
For determining the ladle of tonnage and diameter, the approach for improving RH circular flows has：
1) increase dip pipe and rise bore；
2) increase and promote throughput；
3) increase tedge and promote static pressure at gas gas outlet；
4) vacuum indoor pressure is reduced.
According to production and it was verified that but the existing vacuum circulation degassing purifier using RH methods molten steel circular flow
But there is a upper limit value, still remain following shortcoming：
1) it is more than it in tedge when saturation value in molten steel to promote throughput, and circular flow is not further added by, and is subtracted instead
It is small；
2) dip pipe tedge and down-comer are both needed to be inserted into ladle, and the two diameter is equal, and dipping pipe diameter is by ladle
Diameter limits；
3) tedge promotes static pressure at gas gas outlet has a upper limit value since dip pipe insertion depth limits；
4) the indoor vacuum degree of RH vacuum has reached 100Pa hereinafter, can generally reach 50Pa, disclosure satisfy that degassing is wanted
It asks, and continues reduction vacuum degree and then need to change the vacuum pump of bigger exhaust capacity and want more energy, lose more than gain；
5) existing RH vacuum circulation degassings purifier can not effectively solve the problems, such as dead zone in ladle.
In view of the above problems, being inspired by DH and RH, constantly there is disclosed patent to make improvements in recent 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 an individual 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, or such as patent (application number 201320187158.5) described side by ladle bottom air brick
Can the argon gas that gas gas outlet is blown into be promoted by one side with the single mouth dip pipe for promoting gas gas outlet and cross section is oval cylinder,
Or if patent (application number 201210302397.0) the ladle bottom blowing air brick is plus the circumferentially disposed promotion 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 the molten steel in ladle being driven to transport upwards
It is dynamic, and realize cycle of the molten steel between ladle, dip pipe and vacuum chamber.
Single-mouth refining furnace is compared with using the vacuum circulation degassing purifier of RH methods, and structure is simpler, argon gas bubbles
Working stroke bigger, the circular flow bigger of molten steel, the temperature drop in molten steel cyclic process is small, degassing rate higher, but single mouth essence
Rising flow field of molten steel in furnace dip pipe and declining flow field of molten steel can also interfere with each other, and reduce cycle efficieny, while molten steel recycles
Flow is restricted by the ventilative situation of ladle bottom air brick, once bottom air brick gas permeability, which is deteriorated or blocks, may result in molten steel
Internal circulating load is greatly reduced or even molten steel can not be circulated.
Single mouth dip pipe is divided into two according to a kind of patent (application number 201420179382.4) the band middle retaining wall
Single-mouth refining furnace；A kind of patent (application number 201220713193.1) Intermediate Gray inside barricade divides single mouth dip pipe one
It is two, while dip pipe side band promotes the single-mouth refining furnace of gas gas outlet, above several patents are in various degree to single mouth essence
Furnace has certain improvement, reduces the interference for rising molten steel and declining molten steel 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
Molten steel and decline the interference or bigger between molten steel, cycle efficieny is high not enough, while inside middle barricade level is grown
Degree is longer, and barricade dead weight 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.
Invention content
In view of this, the purpose of the present invention is to provide a kind of three hole dip pipes of single-mouth refining furnace, which can
Increase tedge quantity under conditions of the size and vacuum pump based on existing ladle and vacuum chamber and increases tedge equivalent
Diameter reduces the interference for rising molten steel and declining molten steel to increase circular flow, improves refining efficiency, and can enhance internal barricade
The support strength in centre extends the service life of dip pipe, reduces resistance to material cost.
In order to achieve the above objectives, the present invention provides the following technical solutions：
A kind of three hole dip pipes of single-mouth refining furnace, including tubulose exterior wall and internal barricade, the internal barricade be T shapes or
Tubulose exterior wall is separated to form the identical rise hole of two areas and a drop down hole, the rise hole is equipped with by person's Y-shaped structure
Several promotion gas gas outlets.
Further, the tubulose exterior wall by refractory brick, joint filling sand, liner and pours resistance to material and forms successively from the inside to the outside, institute
Internal barricade is stated to be made of the joint filling sand and refractory brick of liner and liner both sides.
Further, on the outer circle wall of the liner of the tubulose exterior wall and lower curtate be equipped with for the resistance to material of hanging and pouring anchoring
Nail.
Further, the ratio between the sum of area of section of two rise holes and the area of section of drop down hole are 1~2.
Further, it respectively promotes gas gas outlet and is set as 1~2 layer along the axial direction of rise hole, each layer promotes gas gas outlet and is located at
On the same cross section of each layer of rise hole.
Further, each layer includes at least 2 and promotes gas gas outlet, the promotion gas gas outlet cloth straggly on upper layer and lower layer
It sets.
Further, each layer of promotion gas gas outlet, between circumferentially adjacent two promotion gas gas outlet between be divided into
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 keeping the main equipment size constancy of existing single-mouth refining furnace
Equivalent diameter, increase circular flow, while a rise hole driving molten steel cycle is increased relative to single rise hole, 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 set to carrying at rise hole
Gas gas outlet quantity is risen, accordingly increases total promotion throughput, and then increase circular flow.
3) since 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 with faster speed, reduce the molten steel with rise hole lower periphery
It interferes with each other, be conducive to molten steel circulating in ladle and be uniformly mixed, reduce ladle and recycle dead zone.
4) by three pieces of internal barricade shapes are T-shaped or the barrier wall structure of Y shape forms mutual branch to internal barricade centre
Support, effectively raises the support strength in barricade centre, collapses under avoiding barricade centre from deforming and caves in, extends dipping
Tube lifetime.
Description of the drawings
In order to keep the purpose of the present invention, technical solution and advantageous effect clearer, the present invention provides following attached drawing and carries out
Explanation：
Fig. 1 is three hole dip pipe structural schematic diagrams 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 be rise hole II, and 3 be drop down hole, and 4 be liner, and 5 is promote gas gas outlet, and 6 be cast
Resistance to material, 7 be anchor studs, and 8 be joint filling sand, and 9 be refractory brick, and 10 is promote gas pipeline, and 11 be dip pipe liner top flange, and 12 are
Vacuum chamber.
Specific implementation mode
Below in conjunction with attached drawing, the preferred embodiment of the present invention is described in detail.
In transformation of the present invention applied to the RH stoves dip pipe and vacuum chamber of 150T, the vacuum chamber of the RH is synchronous with dip pipe
It is transformed, is 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 three pore structure of mouth formula, barricade and outer arcuate exterior wall are collectively formed rise hole I 1 inside three faces, rise hole II 2, drop down hole 3,
Rise hole I 1 and II 2 periphery of inner wall of rise hole are equipped with one layer and promote gas gas outlet 5, promote gas gas outlet 5 and promote gas pipeline
10 unicom.On 4 periphery wall of liner of tubulose exterior wall and bottom is equipped with anchor studs 7, hangs over the resistance to material 6 of cast of inner bladder outer wall, liner 4
There is refractory brick 9 in the refractory material of inside, there is joint filling sand 8 in the gap in liner 4 and refractory brick 9.It is set at the top of dip pipe liner
It is equipped with flange 11, for being welded to connect fixation with 12 bottom of vacuum chamber.To be matched with three hole dip pipe of this example list mouth, vacuum
It is made of refractory brick inside room 12, outside is cylindrical housing made of steel plate, and 12 lower part of vacuum chamber is equipped with what refractory brick was built into
Three pieces of internal barricades, form three pore structure of cylindrical shape list mouth formula identical with rise hole I 1, rise hole II 2 and 3 shape of drop down hole,
The space communicated with the rise hole of dip pipe and drop down hole is formed with this.Each relevant parameter of wherein three hole dip pipes is：Leaching
It is 0.275m, internal barricade thickness 0.39m that stain bore, which takes 1.8m, arc exterior wall thickness, and three pieces of internal barricades form 120 ° each other
Y-shaped structure, promote gas outlet and be equipped with 1 layer, be equipped with 18 promotion gas outlets altogether away from dip pipe lower part 0.5m, in two rise holes
Mouthful, promotion throughput is 2000NL/min, vacuum indoor pressure 100Pa.
It can be applied to the three hole dip pipe of present case 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.
Single mouth dip pipe comparison of 1 three hole dip pipe of table and the two-tube dip pipes of common RH, Intermediate Gray barricade
As shown in table 1, when air-blowing quantity is all 2000NL/min, and vacuum indoor pressure is all 100Pa, the leaching of three hole of this example
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 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 circular flow increases 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 processing of three hole dip pipe single-mouth refining furnace of this example
Efficiency, which has, significantly to be promoted.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand 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. a kind of three hole dip pipes of single-mouth refining furnace, it is characterised in that：Including tubulose exterior wall and internal barricade, the internal gear
Wall is T shapes or Y-shaped structure, and tubulose exterior wall is separated to form the identical rise hole of two areas and a drop down hole, it is described on
It rises hole and is equipped with several promotion 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
By refractory brick, joint filling sand, liner and pour resistance to material successively outside and form, the internal barricade by liner and liner both sides joint filling sand
And refractory brick composition.
3. three hole dip pipes of single-mouth refining furnace according to claim 2, it is characterised in that：The liner of the tubulose exterior wall
Outer circle wall on and bottom be equipped with for the resistance to material of hanging and pouring anchor studs.
4. three hole dip pipes of single-mouth refining furnace according to claim 1, it is characterised in that：The section face of two rise holes
The ratio between the sum of product and the area of section of drop down hole are 1~2.
5. three hole dip pipes of single-mouth refining furnace according to claim 1, it is characterised in that：The promotion gas gas outlet edge
The axial direction of rise hole is set as 1~2 layer, and each layer promotes gas gas outlet and 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 promotes gas gas outlet
Gas gas outlet, the promotion gas gas outlet arrangement straggly on upper layer and lower layer are promoted including at least 2.
7. three hole dip pipes of single-mouth refining furnace according to claim 6, it is characterised in that：Each layer of promotion gas outlet
Mouthful, between circumferentially adjacent two promotion gas gas outlet between be divided into 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
Degree is 0.7m~1.2m.
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.
Priority Applications (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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| 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 CN106755747A (en) | 2017-05-31 |
| CN106755747B true CN106755747B (en) | 2018-09-18 |
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| 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 |
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 |
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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 |
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| CN106755747A (en) | 2017-05-31 |
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