CN106521065B - A kind of blast furnace material distribution chute and its Design and analysis methods - Google Patents
A kind of blast furnace material distribution chute and its Design and analysis methods Download PDFInfo
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- CN106521065B CN106521065B CN201611107047.3A CN201611107047A CN106521065B CN 106521065 B CN106521065 B CN 106521065B CN 201611107047 A CN201611107047 A CN 201611107047A CN 106521065 B CN106521065 B CN 106521065B
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- chute
- blast furnace
- material distribution
- distribution chute
- furnace material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/18—Bell-and-hopper arrangements
- C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
Abstract
The present invention relates to a kind of blast furnace material distribution chute and its Design and analysis methods, the blast furnace material distribution chute includes chute ontology 1, the guide rail 2 and axial baffle 3 in 1 top both sides of chute ontology is arranged, and chute ontology 1 forms conduit by two side wall panels and bottom surface；The bottom surface of the chute ontology 1 is made of along stream direction sequentially connected orthodrome concave surface 14, roundlet arc convex surface 12 and the circular arc conical surface 11, and orthodrome concave surface 14 is equipped at least 2 circular arc resistance material muscle 13 close to 12 side of roundlet arc convex surface.The present invention uses distinct element method sunykatuib analysis stream buildup feature, the groove profile and cloth muscle scheme of design and adjustment blast furnace material distribution chute, stream impact zone forms the backing strap of all standing in conduit when making cloth, final design provides the blast furnace material distribution chute of significantly " material dnockout " and " material abrasive material " effect, impact and abrasion of the stream to blast furnace material distribution chute can effectively be slowed down, extend the service life of blast furnace material distribution chute.
Description
Technical field
The present invention relates to a kind of blast furnace material distribution chute more particularly to a kind of blast furnace cloth for having material dnockout and expecting abrasive material effect
Expect chute and its Design and analysis methods.
Background technology
Blast furnace material distribution chute bears powerful stream and impacts, and the impact failure and abrasion of stream impact zone are outstanding in chute conduit
To be serious, ordinary blast distributor chute, will be breakdown within 6~8 months time under powerful stream impact force action,
There is hole, therefore the long service life subject under discussion of blast furnace material distribution chute has obtained the concern of many engineers and technicians, such as：
Authorization Notice No. is the Chinese patent of CN100552047C, discloses a kind of " distributor chute ", semicircular shell
Inner headed face on fixed axial tandem, radial several unit liner plates with alloy cutter head side by side, by being noted in unit liner plate
Enter alloy cutter head, improves the wear-resisting, corrosion-resistant of liner plate, impact strength；
Authorization Notice No. is the Chinese patent of CN101581541B, discloses " a kind of long life distribution chute ", including six sides
The associate members such as shape chute head, hexagon chute ontology, wear-resistant liner, lightweight refracrory and fastener, in chute interior
Material abrasive material material stock plate is increased at discharging point, direct impact of the stream to wear-resistant liner is prevented, in chute ontology stage casing and leading portion
Outer surface is coated with lightweight refracrory, alleviates the impact of high temperature center air-flow in chute weight and energy reaistance furnace, chute side
Face wear-resistant liner and bottom surface wear-resistant liner are lived using the concave-convex seam allowance that interlocks to be connected, and wear-resistant liner deformation can be effectively absorbed.
Authorization Notice No. is the Chinese patent of CN101857909B, is disclosed " a kind of distributor chute ", including a section
In the shell of polygon, the inner surface of shell is equipped with bottom block compatible with its shape, and the bottom block bottom surface upper edge is vertical
To at least provided with one group by horizontal cuttage plate and vertical cuttage plate cuttage at " well " font cuttage board group part；Wear resistant and impact resistant blanking port
Component, the bottom block two sides are equipped with vertical bars, and the horizontal cuttage plate is identical equipped with direction with the bottom surface of bottom block
It is inclination angle, described " well " gap of bottom surface is equipped with shock resistance block in the middle part of font cuttage board group part.The purpose is to improve cloth
The service life of chute and facilitate repair replace, reduce production cost.
In blast furnace material distribution chute organization plan disclosed above, complicated lining plate structure is mostly used greatly, is constituted in chute
Radial groove or " well " font groove, store certain material, form local buildup effect, but since structure is limited, buildup
Effect has to be fortified, and stream impact zone can not form the backing strap of all standing, causes separation structure (such as liner plate) exposure inside slot
Under the impact of stream；And liner plate or accessory structure, there is acute angle, wear-resistant effect is poor；Therefore, although with common
Blast furnace material distribution chute can extend compared to service life, but due to not having to generate the effect of " material dnockout " and " material abrasive material ", because
This, however it remains the protection effect difference of chute impact zone is caused to use after being destroyed in complicated, the buildup structure short time
Service life shorter disadvantage.
Invention content
The present invention provides a kind of blast furnace material distribution chute and its Design and analysis methods, using distinct element method sunykatuib analysis stream
Buildup feature, the groove profile and cloth muscle scheme of design and adjustment blast furnace material distribution chute, makes when cloth that stream impact zone is formed in conduit
The backing strap of all standing, final design provide the blast furnace material distribution chute of significantly " material dnockout " and " material abrasive material " effect, can be effective
Ground slows down impact and abrasion of the stream to blast furnace material distribution chute, extends the service life of blast furnace material distribution chute.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of blast furnace material distribution chute, including chute ontology, guide rail and axial baffle in chute body upper part both sides are set,
Chute ontology forms conduit by two side wall panels and bottom surface；The bottom surface of the chute ontology is along stream direction by sequentially connected great circle
Arc concave surface, roundlet arc convex surface and circular arc conical surface composition, orthodrome concave surface are hindered close to roundlet arc convex surface side equipped at least 2 circular arcs
Expect muscle.
The circular arc conical surface is narrowed along stream direction.
The two side wall panels that orthodrome concave surface section and roundlet arc convex surface section are corresponded on the chute ontology are arranged in parallel, corresponding circle
The two side wall panels of arc conical surface section are obliquely installed along longitudinal direction, and gradient is matched with the angle that the circular arc conical surface narrows.
The chute ontology material is cast steel, pile-up welding hard alloy layer in conduit.
The Design and analysis methods of blast furnace material distribution chute, include the following steps：
1) blast furnace material distribution chute model and blast furnace central throat tube model are established using three-dimensional graphics software, and forms three-dimensional dress
Ligand Model；
2) DEM analysis principle is used, using material when EDEM particle system simulation analysis softwares progress blast furnace material distribution
Grain motion analysis, is respectively set physical attribute, gravitational field and the geometric attribute of particle；
3) the three-dimensional entire assembly model established in three-dimensional graphics software is imported into EDEM particle system simulation analysis softwares；
4) batch production setting, including setting amounts of particles and movement velocity are carried out to material particles；
5) solving condition is set and is solved；
6) the buildup result in blast furnace material distribution chute material impact area is analyzed, including simulation chute buildup area and prediction
Backing strap forms area；Specifically two kinds of operating modes of blast furnace material distribution chute small inclination cloth and high inclination-angle cloth are simulated respectively, are examined
The buildup of impact zone and backing strap formational situation when examining extreme tilt angle；
7) analytical conclusions：Blast furnace material distribution equipped with orthodrome concave surface, roundlet arc convex surface, the circular arc conical surface and circular arc resistance material muscle slips
Slot, under two kinds of operating modes of small inclination cloth and high inclination-angle cloth, on roundlet arc convex surface, circular arc resistance material muscle, orthodrome concave surface
A layered material pad can be covered, stream impact can be slowed down, is played the role of " material dnockout "；Meanwhile stream impact zone in conduit
Backing strap bottoms material particle velocity substantially reduces, and is 0~1.68m/s when high inclination-angle, is 0~1.82m/s when small inclination；
Abrasion of the material to chute in impact zone can be mitigated, played the role of " material abrasive material ".
Compared with prior art, the beneficial effects of the invention are as follows：
1) based on distinct element method, using EDEM particle systems simulation analysis software as tool, chute sheet is being fully considered
Shape, the physical attribute of material, the initial velocity of material, material the conditioned basics such as elemental height on, to chute ontology
Structural simulation is analyzed, and by investigating Flow of Goods and Materials and buildup situation in chute ontology, significant product is formed in stream impact zone
Material and backing strap, slow down impact and abrasion of the stream to chute ontology, and significant " material dnockout " and " material are formed in stream impact zone
The advantageous effect of abrasive material "；
2) feed side of chute ontology uses wide conduit, exit side to strengthen using the conical conduit for upwarping and narrowing
Buildup in slot, contributes to the backing strap of impact zone to be formed；
3) orthodrome concave surface in chute ontology, the channel structure that roundlet arc convex surface, the circular arc conical surface are formed, in its exit side shape
At the buildup structure of " half-open spout of a teapot " formula, is conducive to buildup and forms backing strap；
4) at least setting of 2 circular arc resistance material muscle, can slow down stream speed, be conducive to buildup, increase the thickness of backing strap.
Description of the drawings
Fig. 1 is the dimensional structure diagram of blast furnace material distribution chute of the present invention.
Fig. 2 is the longitudinal sectional view of blast furnace material distribution chute of the present invention.
Fig. 3 is of the present invention using EDEM particle system simulation analysis softwares simulation high inclination-angle cloth operating mode blanking flow velocity
The schematic diagram of degree.
Fig. 4 is of the present invention using EDEM particle system simulation analysis softwares simulation small inclination cloth operating mode blanking flow velocity
The schematic diagram of degree.
Fig. 5 is blast furnace material distribution chute key dimension schematic diagram in the embodiment of the present invention.
In figure：1. the chute ontology 11.. circular arcs conical surface 12. roundlet arc convex surface, 13. circular arc resistance material 14. orthodromes of muscle are recessed
2. guide rail of face, 3. axial baffle
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Figure 1 and Figure 2, a kind of blast furnace material distribution chute of the present invention, including chute ontology 1, setting are in chute ontology
The guide rail 2 and axial baffle 3 on 1 top both sides, chute ontology 1 form conduit by two side wall panels and bottom surface；The chute ontology 1
Bottom surface is made of along stream direction sequentially connected orthodrome concave surface 14, roundlet arc convex surface 12 and the circular arc conical surface 11, and orthodrome is recessed
Face 14 is equipped at least 2 circular arc resistance material muscle 13 close to 12 side of roundlet arc convex surface.
The circular arc conical surface 11 is narrowed along stream direction.
The two side wall panels that orthodrome concave surface section and roundlet arc convex surface section are corresponded on the chute ontology 1 are arranged in parallel, corresponding
The two side wall panels of circular arc conical surface section are obliquely installed along longitudinal direction, and gradient is matched with the angle that the circular arc conical surface 11 narrows.
1 material of chute ontology is cast steel, pile-up welding hard alloy layer in conduit.
The Design and analysis methods of blast furnace material distribution chute, include the following steps：
1) blast furnace material distribution chute model and blast furnace central throat tube model are established using three-dimensional graphics software, and forms three-dimensional dress
Ligand Model；
2) DEM analysis principle is used, using material when EDEM particle system simulation analysis softwares progress blast furnace material distribution
Grain motion analysis, is respectively set physical attribute, gravitational field and the geometric attribute of particle；
3) the three-dimensional entire assembly model established in three-dimensional graphics software is imported into EDEM particle system simulation analysis softwares；
4) batch production setting, including setting amounts of particles and movement velocity are carried out to material particles；
5) solving condition is set and is solved；
6) the buildup result in blast furnace material distribution chute material impact area is analyzed, including simulation chute buildup area and prediction
Backing strap forms area；Specifically two kinds of operating modes of blast furnace material distribution chute small inclination cloth and high inclination-angle cloth are simulated respectively, are examined
The buildup of impact zone and backing strap formational situation when examining extreme tilt angle；
7) analytical conclusions：Height equipped with orthodrome concave surface 14, roundlet arc convex surface 12, the circular arc conical surface 11 and circular arc resistance material muscle 13
Stove distributor chute, under two kinds of operating modes of small inclination cloth and high inclination-angle cloth, in roundlet arc convex surface 12, circular arc resistance material muscle 13, big
A layered material pad (dark parts in Fig. 3, Fig. 4) can be covered on circular arc concave surface 14, can slow down stream impact, played and " expected to beat
The effect of material "；Meanwhile the backing strap bottoms material particle velocity of stream impact zone substantially reduces in conduit, when high inclination-angle, is
0~1.68m/s is 0~1.82m/s when small inclination；Abrasion of the material to chute in impact zone can be mitigated, play " material mill
The effect of material ".
Following embodiment is being implemented down based on the technical solution of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment】
The buildup situation of blast furnace material distribution hopper is not only related with the shape of blast furnace material distribution hopper, also physical with particle
Matter, blanking velocity etc. are related, and distinct element method is the method that particles collision calculating is carried out based on Newton's second law, can be very
Particle kinetics and powder dynamics problem are handled well, and therefore, the present invention is using distinct element method simulation chute buildup and prediction
Backing strap forms state.
For the material used in the present embodiment for agglomerates of sintered pellets material, the initial stream speed of setting is 2m/s.
As shown in figure 5, blast furnace material distribution chute overall length is 5290mm, wherein the radius of orthodrome concave surface 14 is 2510mm, small
The radius of arc convex surface 12 is 1290mm, and the radius of circular arc resistance material muscle 13 is 150mm, and the cone angle of the circular arc conical surface 11 is 6 °.
The present embodiment simulates the mistake of high inclination-angle cloth operating mode blanking flow velocity degree using EDEM particle system simulation analysis softwares
Journey is as shown in figure 3, material particles movement velocity is 0~1.68m/s.
The present embodiment simulates the mistake of small inclination cloth operating mode blanking flow velocity degree using EDEM particle system simulation analysis softwares
Journey is as shown in figure 4, material particles movement velocity is 0~1.82m/s.
In the present invention, blast furnace material distribution chute bottom surface is first set along stream direction there are one orthodrome concave surface 14, exit side bottom surface
For a circular arc conical surface 11, orthodrome concave surface 14 is mutually connected with 11 transition position of the circular arc conical surface using roundlet arc convex surface 12, orthodrome
The exit side of concave surface 14 is equipped with 2 or more circular arc resistance material muscle 13.
When blast furnace material distribution chute works, above structure promotes material to form buildup and backing strap in stream impact zone, is formed
After backing strap, the stream directly impact fallen from blast furnace central throat tube forms significantly " material dnockout " advantageous effect on backing strap；
Due to the cushioning effect of backing strap, the stream impact force suffered by blast furnace material distribution chute is made to greatly reduce；Meanwhile being formed after backing strap,
The material particles movement velocity of stream impact zone backing strap bottom substantially reduces, and material particles only form stream, shape on backing strap top
At the advantageous effect of " material abrasive material ", to alleviate abrasion of the material to chute in stream impact zone.
Chute ontology is manufactured using cast steel, and the pile-up welding hard alloy layer in conduit, to improve the abrasion-resistance of inner surface；
Meanwhile the feed side weight of chute ontology is larger, effectively reduces the Tilting Torque of blast furnace material distribution chute.Chute ontology into
Material side is disposed with guide rail 2 and axial baffle 3, and is equipped with two rows of bolts hole in 2 both sides of guide rail, to be fixed with bolt with actuating arm
Together.Exit side circular arc conical surface section top is equipped with big hole, is used when in case replacing blast furnace material distribution chute.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of Design and analysis methods of blast furnace material distribution chute, the blast furnace material distribution chute includes chute ontology, is arranged in chute
The guide rail and axial baffle of body upper part both sides, chute ontology form conduit by two side wall panels and bottom surface；It is characterized in that, described
The bottom surface of chute ontology is made of along stream direction sequentially connected orthodrome concave surface, roundlet arc convex surface and the circular arc conical surface, great circle
Arc concave surface is equipped at least 2 circular arc resistance material muscle close to roundlet arc convex surface side；
The Design and analysis methods of the blast furnace material distribution chute include the following steps：
1) blast furnace material distribution chute model and blast furnace central throat tube model are established using three-dimensional graphics software, and forms three-dimensional assembly
Model；
2) DEM analysis principle is used, material particles are transported when carrying out blast furnace material distribution using EDEM particle system simulation analysis softwares
Dynamic analysis, is respectively set physical attribute, gravitational field and the geometric attribute of particle；
3) the three-dimensional entire assembly model established in three-dimensional graphics software is imported into EDEM particle system simulation analysis softwares；
4) batch production setting, including setting amounts of particles and movement velocity are carried out to material particles；
5) solving condition is set and is solved；
6) the buildup result in blast furnace material distribution chute material impact area is analyzed, including simulation chute buildup area and prediction backing strap
Form area；Specifically two kinds of operating modes of blast furnace material distribution chute small inclination cloth and high inclination-angle cloth are simulated respectively, investigate pole
The buildup and backing strap formational situation of impact zone when limiting inclination angle；
7) analytical conclusions：Blast furnace material distribution chute equipped with orthodrome concave surface, roundlet arc convex surface, the circular arc conical surface and circular arc resistance material muscle,
Under two kinds of operating modes of small inclination cloth and high inclination-angle cloth, can on concave surface in roundlet arc convex surface, circular arc resistance material muscle, orthodrome
A layered material pad is covered, stream impact can be slowed down, is played the role of " material dnockout "；Meanwhile in conduit stream impact zone backing strap
Bottoms material particle velocity substantially reduces, and is 0~1.68m/s when high inclination-angle, is 0~1.82m/s when small inclination；It can
Mitigate abrasion of the material to chute in impact zone, plays the role of " material abrasive material ".
2. a kind of Design and analysis methods of blast furnace material distribution chute according to claim 1, which is characterized in that the circular arc cone
It is narrowed along stream direction in face.
3. a kind of Design and analysis methods of blast furnace material distribution chute according to claim 1, which is characterized in that the chute sheet
The two side wall panels that orthodrome concave surface section and roundlet arc convex surface section are corresponded on body are arranged in parallel, the two side wall panels of corresponding circular arc conical surface section
It is obliquely installed along longitudinal direction, and gradient is matched with the angle that the circular arc conical surface narrows.
4. a kind of Design and analysis methods of blast furnace material distribution chute according to claim 1, which is characterized in that the chute sheet
Body material is cast steel, pile-up welding hard alloy layer in conduit.
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| CN201611107047.3A CN106521065B (en) | 2016-12-06 | 2016-12-06 | A kind of blast furnace material distribution chute and its Design and analysis methods |
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| CN201611107047.3A CN106521065B (en) | 2016-12-06 | 2016-12-06 | A kind of blast furnace material distribution chute and its Design and analysis methods |
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| CN109373194A (en) * | 2018-11-05 | 2019-02-22 | 中冶北方（大连）工程技术有限公司 | Chute device |
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| CN113688483A (en) * | 2021-10-09 | 2021-11-23 | 中冶京诚工程技术有限公司 | Method and device for simulating cooling wall of blast furnace |
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| CN201648413U (en) * | 2010-02-23 | 2010-11-24 | 宝山钢铁股份有限公司 | Material distribution chute on furnace top of blast furnace |
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| CN2225305Y (en) * | 1995-04-12 | 1996-04-24 | 冶金工业部长沙矿冶研究院 | Platform type step lining plate for grinder |
| CN201587954U (en) * | 2009-11-27 | 2010-09-22 | 唐山国丰钢铁有限公司 | Distribution chute |
| CN201648413U (en) * | 2010-02-23 | 2010-11-24 | 宝山钢铁股份有限公司 | Material distribution chute on furnace top of blast furnace |
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