CN109249013A - A kind of stuffing sand interstitital texture and plus sand technique for refining ladle - Google Patents
A kind of stuffing sand interstitital texture and plus sand technique for refining ladle Download PDFInfo
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- CN109249013A CN109249013A CN201811057675.4A CN201811057675A CN109249013A CN 109249013 A CN109249013 A CN 109249013A CN 201811057675 A CN201811057675 A CN 201811057675A CN 109249013 A CN109249013 A CN 109249013A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/44—Consumable closure means, i.e. closure means being used only once
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention discloses a kind of stuffing sand interstitital texture for refining ladle and add sand technique, the refining ladle includes the filling pipe end and collector nozzle for being located at refining ladle bottom and being mutually butted by sled mechanism, the periphery of filling pipe end is equipped with pocket block, the pocket block is equipped with the inner hole being connected with filling pipe end, the stuffing sand interstitital texture includes: the first stuffing sand and the second stuffing sand being filled in from the bottom to top in filling pipe end and pocket block inner hole under use state, sintering temperature > 1500 DEG C of first stuffing sand, the sintering temperature of second stuffing sand is 1450~1500 DEG C.Stuffing sand interstitital texture provided by the invention and add sand technique, self-opening rate when pouring molten steel can be significantly improved, the quality of refined molten steel and the safe and smooth progress of continuous casting process is effectively ensured.
Description
Technical field
The present invention relates to technical field of refractory materials, and in particular to a kind of stuffing sand interstitital texture for refining ladle and
Add sand technique.
Background technique
As society is continuously increased high-grade steel grade demand, molten steel nearly all will be after external refining be handled at present
It is poured again, but because liquid steel refining working condition is complicated, there are the following problems for meeting:
1) the liquid steel refining time is long, such as stainless steel, certain special electric furnace steel grades are smelted, and stuffing sand is easy to cause to be burnt into layer
It is blocked up；
2) it is long to put the time for molten steel biography, due to its uncontrollability, passes sometimes and puts the time and be even more than 10h, stuffing sand is caused to burn
It is blocked up to tie layer；
3) packet bottom water mouth temperature is low, new packet, overhaul packet, in repair deactivated packet in packet or hot circular flow etc., packet bottom temperature
Degree causes molten steel and stuffing sand to form condensation agglomeration often less than 600 DEG C；
The above problem easily influences the automatic casting ratio of stuffing sand in ladle nozzle.
Meanwhile domestic steel mills many at present are just promoting robot and are carrying out molten steel automatic casting, open artificial burning oxygen and pour greatly
Limitation when carrying out molten steel automatic casting, requires even more than 99.5% to the casting rate of stuffing sand, if still using existing market
General drainage sand, do not adapted to liquid steel refining technique use demand complicated and changeable.
Summary of the invention
The present invention provides a kind of stuffing sand interstitital texture for refining ladle and add sand technique, steel can be significantly improved
Self-opening rate when water is poured, is effectively ensured the quality of refined molten steel and the safe and smooth progress of continuous casting process.
A kind of stuffing sand interstitital texture for refining ladle, the refining ladle include positioned at refining ladle bottom and leading to
Cross the filling pipe end and collector nozzle that sled mechanism is mutually butted, the periphery of filling pipe end is equipped with pocket block, the pocket block be equipped with
The inner hole that filling pipe end is connected, the stuffing sand interstitital texture includes: to be filled in filling pipe end and water under use state from the bottom to top
The first stuffing sand and the second stuffing sand in mouth brick cup inner hole, sintering temperature > 1500 DEG C of first stuffing sand, the second drainage
The sintering temperature of sand is 1450~1500 DEG C.
Using two kinds of stuffing sands filling filling pipe ends and pocket block inner hole in the present invention, wherein lower layer's filling sintering temperature compared with
High stuffing sand, upper layer put into the lower stuffing sand of sintering temperature, can quickly form burning after upper layer stuffing sand and steel contacts
Layer is tied, the lasting infiltration of molten steel is prevented, avoids causing to be unable to automatic casting, the sintering of lower layer's stuffing sand because generating condensation agglomeration
Temperature is higher, can prevent under the operating condition that the liquid steel refining time is long or biography puts time length because occurring causing not due to sinter layer is blocked up
It can automatic casting.
The sand feeding amount of two kinds of stuffing sands can be adjusted according to different steel grades, different refining times and ladle baking condition
It is whole, to adapt to a variety of refining operating conditions, significantly improve that refining time is long, molten steel biography is put under the situations such as of long duration or packet bottom temperature is low
Ladle automatic free-opening rate, the quality of refined molten steel and the safe and smooth progress of continuous casting process is effectively ensured.
The structure of refining ladle uses the prior art in the present invention, improves the interstitital texture for being only that stuffing sand.
Preferably, being filled with first stuffing sand in filling pipe end, draw in pocket block inner hole filled with described first
Quicksand and the second stuffing sand.
The first stuffing sand is filled in filling pipe end, adjusts the first stuffing sand and the second drainage in pocket block inner hole as needed
The dosage of sand.
Preferably, it is spherical crown shape that second stuffing sand, which is exposed to the part natural packing outside pocket block inner hole,.
First stuffing sand and the second stuffing sand are all made of plus sandpipe is filled, and the second stuffing sand is exposed to bottom on the inside of ladle
The part natural packing in portion is spherical crown shape, when molten steel being avoided to wash away ladle bottom, in water due to the second stuffing sand is by part erosion
Recess is formed at mouth brick cup inner hole.
Preferably, pocket block inner hole include: the straightway being connected to each other with filling pipe end and be mutually connected with straightway and
First stuffing sand, the conical section are filled with along the conical section being gradually flared away from filling pipe end direction, the straightway
It is interior to be filled with second stuffing sand.
The straightway and filling pipe end of pocket block inner hole are interconnected and isometrical extension, straightway and pocket block inner hole
The first stuffing sand is filled in straightway and filling pipe end.
Preferably, first stuffing sand is chromium matter stuffing sand, quartziferous stuffing sand, at least one in magnesia stuffing sand
Kind.
The chromium matter stuffing sand, quartziferous stuffing sand, magnesia stuffing sand use stuffing sand kind in the prior art, only need
Meets the needs of sintering temperature.
Preferably, second stuffing sand includes at least one of chromite and following component:
A) titanium aluminic acid calcisphere；
B) emery is cast.
Using chromite as primary raw material, the chemical component of chromite includes: second stuffing sand
Cr2O3、Al2O3, MgO and Fe2O3, when chromite additional amount is very big, when being packed together in flakes, just can at 1450 DEG C
More significant sintering occurs and generates intensity, magnesia chrome spinel, magnesium aluminate spinel, hercynite, pink fused alumina in sintered product
Solid solution is all high-melting-point object phase, is at service temperatures not in liquid phase, and sinter layer thickness and intensity are appropriate.
For second stuffing sand using titanium aluminic acid calcisphere and casting emery as auxiliary material, titanium aluminic acid calcisphere and casting emery are ball
Shape can add simultaneously in the second stuffing sand, or individually addition.
Titanium aluminic acid calcisphere and casting emery can be obviously improved the mobile performance of the second stuffing sand, and the second stuffing sand is enable to fill out
Expire pocket block inner hole and is spherical crown shape in pocket block surface natural packing, at the same time, titanium aluminic acid calcisphere and casting emery
The sintering temperature that addition can regulate and control the second stuffing sand fluctuates within the scope of 1450~1500 DEG C, to adapt to different ladle operating conditions
Condition.
Preferably, the mass fraction of chromite is not less than 85% in the second stuffing sand.Chromite in second stuffing sand
Granularity is 14~100 mesh, Cr in chromite2O3Mass fraction >=47.0%.
The granularity of chromite be 14~100 mesh refer to the partial size of chromite be 150 μm (corresponding 100 mesh screens)~1180 μm
(corresponding 14 mesh screens).
Preferably, the mass fraction of titanium aluminic acid calcisphere is 5~15% in the second stuffing sand, the granularity of titanium aluminic acid calcisphere is
14~40 mesh；The mass fraction that emery is cast in second stuffing sand is 5~15%, and the granularity for casting emery is 14~40 mesh.
Al in titanium aluminic acid calcisphere2O3Mass fraction >=65.0%, CaO+TiO2Mass fraction=20.0~30.0%；Casting is precious
Al in sand2O3Mass fraction >=70.0%, SiO2Mass fraction≤20.0%.
The granularity of titanium aluminic acid calcisphere be 14~40 mesh refer to the partial size of titanium aluminic acid calcisphere be 380 μm (corresponding 40 mesh screens)~
1180 μm (corresponding 14 mesh screens).
The granularity of casting emery be 14~40 mesh refer to the partial size of casting emery be 380 μm (corresponding 40 mesh screens)~1180 μm
(corresponding 14 mesh screens).
The present invention also provides a kind of stuffing sands of the stuffing sand interstitital texture described in realize to add sand technique, including walks as follows
It is rapid:
The first stuffing sand and second is filled in the filling pipe end and pocket block inner hole being successively connected to refining ladle bottom to draw
Quicksand, wherein sintering temperature > 1500 DEG C of the first stuffing sand, the sintering temperature of the second stuffing sand is 1450~1500 DEG C.
After hot repair, overturn refining ladle, one plus sandpipe placed right above pocket block, by add sandpipe to
The first stuffing sand and the second stuffing sand are sequentially filled in filling pipe end and pocket block inner hole.
Stuffing sand interstitital texture provided by the present invention for refining ladle and add sand technique, is suitable for a variety of refining operating conditions
Condition, is particularly suitable for that refining time is long, molten steel passes and puts operating condition of long duration and that packet bottom temperature is low, and casting rate is high and opens and pours
Rate is stablized, and the quality of refined molten steel and the safe direct motion of continuous casting process is effectively ensured.
Detailed description of the invention
Fig. 1 is schematic diagram of the present invention for the stuffing sand interstitital texture of refining ladle.
Specific embodiment
With reference to the accompanying drawing, for the stuffing sand interstitital texture of refining ladle and sand technique is added to do and retouch in detail the present invention
It states.
Embodiment 1
As shown in Figure 1, a kind of stuffing sand interstitital texture for refining ladle, refining ladle includes being located at refining ladle bottom
Portion and the filling pipe end 6 and collector nozzle 7 being mutually butted by sled mechanism, the periphery of filling pipe end 6 are equipped with pocket block 3, mouth of a river seat
Brick 3 is equipped with the inner hole being connected with filling pipe end 6.
Sled mechanism includes the upper slide 4 and lower skateboard 5 being mutually slidably matched, and upper slide 4 and filling pipe end 6 are relatively fixed,
Lower skateboard 5 and collector nozzle 7 are relatively fixed, by push lower skateboard 5 may be implemented filling pipe end 6 and collector nozzle 7 be interconnected and
Partition.
3 inner hole of pocket block includes: the straightway being connected to each other with filling pipe end 6 and is mutually connected with straightway and along away from upper
The conical section that 6 direction of the mouth of a river is gradually flared.
It is filled with the first stuffing sand 2 in filling pipe end 6, is filled with the first stuffing sand 2 in the straightway of 3 inner hole of pocket block,
The second stuffing sand 1 is filled in conical section, it is ball that the second stuffing sand 1, which is exposed to the part natural packing outside 3 inner hole of pocket block,
It is coronal.
Stuffing sand interstitital texture same as Example 1 is all made of in embodiment 2~9, difference is ladle refining condition
And first stuffing sand and the second stuffing sand component it is different.
Embodiment 2
150 tons of electric furnace ladles, 1650~1700 DEG C of electric furnace steel tapping temperature, molten steel refining technology is LF (refining)+VOD (true
Empty deoxidation), refining time is in 3~5h.After pouring molten steel, pocket block and filling pipe end internal residual steel slag are carried out clear
It is clean, close slide plate (i.e. filling pipe end and collector nozzle are in partition state as shown in Figure 1), ladle become a full member, by stuffing sand plus
Sand conduit first adds the common magnesia stuffing sand (i.e. the first stuffing sand) of 15 kilograms of sintering temperatures higher (> 1550 DEG C), adds
The high chromium stuffing sand (i.e. the second stuffing sand) of 35 kilograms of sintering temperatures lower (1500 DEG C of ≈), it is ensured that pocket block upper end nature heap
Product balling-up is coronal.Liquid steel refining time 4h, total pass puts time 5h, and when ladle continuous casting, which is opened, to be poured, opening slide plate, (i.e. filling pipe end is under
Mouth of a river connection), since commonly magnesia stuffing sand sintering degree is low for lower layer, in the case where losing skid plates support power, due to itself
Gravity is voluntarily flowed out from filling pipe end；The sinter layer for the suitable thickness that upper layer Gao Ge stuffing sand is formed is losing lower layer's sand and slide plate branch
In the case where support force, sinter layer is crushed since ferrostatic pressure acts on, so that stuffing sand is automatically from filling pipe end and mouth of a river seat
Outflow in brick, to realize the purpose of ladle draining sand automatic casting.
In second stuffing sand of the present embodiment, the mass fraction of chromite is 85%, and the granularity of chromite is 14~100 mesh
(can cannot pass through 100 mesh screens by 14 mesh screens), Cr in chromite2O3Mass fraction >=47.0%；Titanium aluminic acid calcisphere
Mass fraction be 5%, the granularity of titanium aluminic acid calcisphere is that 14~40 mesh (can cannot pass through 40 meshes by 14 mesh screens
Net)；The mass fraction that emery is cast in second stuffing sand is 10%, and the granularity for casting emery is 14~40 mesh.
Embodiment 3
300 tons of converter ladles, 1600~1650 DEG C of Tapping Temperature of Bof, because of working condition, biography of the molten steel in ladle is put
Time is often up to 5~10h.After pouring molten steel, staff carries out pocket block and filling pipe end internal residual steel slag clear
It is clean, slide plate is closed, ladle is become a full member, 30 kilograms of sintering temperatures higher (> 1550 DEG C) are first added by stuffing sand plus sand conduit
Common chromium matter stuffing sand (i.e. the first stuffing sand), adds the high chromium stuffing sand of 50 kilograms of sintering temperatures lower (1500 DEG C of ≈)
(i.e. the second stuffing sand), it is ensured that the natural packing balling-up of pocket block upper end is coronal.Liquid steel refining time 1.5h, total pass put the time
10h opens slide plate since the common chromium matter stuffing sand sintering degree of lower layer is low and is losing skid plates support when ladle continuous casting, which is opened, to be poured
In the case where power, since self gravity is voluntarily flowed out from filling pipe end；And the sintering for the suitable thickness that upper layer Gao Ge stuffing sand is formed
Layer crushes sinter layer since ferrostatic pressure acts on, in the case where losing lower layer's sand and skid plates support power so that drainage
Sand is flowed out out of filling pipe end and pocket block automatically, so that ladle automatic casting can be realized.
In second stuffing sand of the present embodiment, the mass fraction of chromite is 88%, and the granularity of chromite is 14~100
Mesh, Cr in chromite2O3Mass fraction >=47.0%；The mass fraction of titanium aluminic acid calcisphere is 5%, and the granularity of titanium aluminic acid calcisphere is
14~40 mesh；The mass fraction that emery is cast in second stuffing sand is 7%, and the granularity for casting emery is 14~40 mesh.
Embodiment 4
300 tons of converter ladles, 1600~1650 DEG C of Tapping Temperature of Bof, because baking condition limits, it is new build packet, overhaul packet,
In repair and wrap line before, wrap about 600 DEG C of bottom temperature.After pouring molten steel, staff is to residual inside pocket block and filling pipe end
It stays steel slag to be cleaned, closes slide plate, ladle is become a full member, it is higher first to add 25 kilograms of sintering temperatures by stuffing sand plus sand conduit
It is lower (1450 DEG C of ≈) to add 50 kilograms of sintering temperatures for the common quartziferous stuffing sand (i.e. the first stuffing sand) of (> 1550 DEG C)
High chromium stuffing sand (i.e. the second stuffing sand), it is ensured that the natural packing balling-up of pocket block upper end is coronal.Liquid steel refining time 1h, always
Biography puts time 3h, when ladle continuous casting, which is opened, to be poured, opens slide plate and is losing since the common quartziferous stuffing sand sintering degree of lower layer is low
In the case where going skid plates support power, since self gravity is voluntarily flowed out from filling pipe end；And the formation of upper layer Gao Ge stuffing sand is suitable
Sintering is laminated in the case where losing lower layer's sand and skid plates support power since ferrostatic pressure acts on by the sinter layer of thickness
It is broken, so that stuffing sand is flowed out out of filling pipe end and pocket block automatically, so that ladle automatic casting can be realized.
In second stuffing sand of the present embodiment, the mass fraction of chromite is 90%, and the granularity of chromite is 14~100
Mesh, Cr in chromite2O3Mass fraction >=47.0%；The mass fraction of titanium aluminic acid calcisphere is 6%, and the granularity of titanium aluminic acid calcisphere is
14~40 mesh；The mass fraction that emery is cast in second stuffing sand is 4%, and the granularity for casting emery is 14~40 mesh.
Embodiment 5
300 tons of converter ladles, 1600~1650 DEG C of Tapping Temperature of Bof, pouring molten steel uses robot automatic casting.Steel
After water is poured, staff cleans pocket block and filling pipe end internal residual steel slag, closes slide plate, and ladle is turned
Just, the common chromium matter stuffing sand (i.e. first of 30 kilograms of sintering temperatures higher (> 1550 DEG C) is first added by stuffing sand plus sand conduit
Stuffing sand), add the high chromium stuffing sand (i.e. the second stuffing sand) of 50 kilograms of sintering temperatures lower (1500 DEG C of ≈), it is ensured that the mouth of a river
The natural packing balling-up of brick cup upper end is coronal.Liquid steel refining time 2h, total pass puts time 4h, when ladle continuous casting, which is opened, to be poured, opens and slides
Plate, since the common chromium matter stuffing sand sintering degree of lower layer is low, in the case where losing skid plates support power, since self gravity is from upper
It voluntarily flows out at the mouth of a river；And the sinter layer for the suitable thickness that upper layer Gao Ge stuffing sand is formed is losing lower layer's sand and skid plates support power
In the case of, sinter layer is crushed since ferrostatic pressure acts on, so that stuffing sand is flowed out of filling pipe end and pocket block automatically
Out, so that ladle automatic casting can be realized.
In second stuffing sand of the present embodiment, the mass fraction of chromite is 88%, and the granularity of chromite is 14~100
Mesh, Cr in chromite2O3Mass fraction >=47.0%；The mass fraction of titanium aluminic acid calcisphere is 6%, and the granularity of titanium aluminic acid calcisphere is
14~40 mesh；The mass fraction that emery is cast in second stuffing sand is 6%, and the granularity for casting emery is 14~40 mesh.
Embodiment 6
100 tons of electric furnace ladles, 1650~1700 DEG C of electric furnace steel tapping temperature, molten steel refining technology LF+VOD, refining time
In 3~5h.After pouring molten steel, staff cleans pocket block and filling pipe end internal residual steel slag, closes and slides
Plate becomes a full member ladle, and the common quartziferous of 10 kilograms of sintering temperatures higher (> 1550 DEG C) is first added by stuffing sand plus sand conduit
Stuffing sand (i.e. the first stuffing sand), adding the high chromium stuffing sand of 25 kilograms of sintering temperatures lower (1500 DEG C of ≈), (i.e. second draws
Quicksand), it is ensured that the natural packing balling-up of pocket block upper end is coronal.Liquid steel refining time 4.5h, total pass put time 6h, when ladle connects
Casting is opened when pouring, and slide plate is opened, since the common quartziferous stuffing sand sintering degree of lower layer is low, the case where losing skid plates support power
Under, it is voluntarily flowed out due to self gravity from filling pipe end；And the sinter layer for the suitable thickness that upper layer Gao Ge stuffing sand is formed is losing
In the case where sub-cloud sand and skid plates support power, sinter layer is crushed since ferrostatic pressure acts on, so that stuffing sand is automatic
It is flowed out out of filling pipe end and pocket block, to realize the purpose of ladle draining sand automatic casting.
In second stuffing sand of the present embodiment, the mass fraction of chromite is 90%, and the granularity of chromite is 14~100
Mesh, Cr in chromite2O3Mass fraction >=47.0%；The mass fraction for casting emery is 10%, and the granularity for casting emery is 14~40
Mesh.
Embodiment 7
250 tons of converter ladle, 1600~1650 DEG C of Tapping Temperature of Bof, because of working condition, biography of the molten steel in ladle
The time is put often up to 3~8h.After pouring molten steel, staff carries out pocket block and filling pipe end internal residual steel slag clear
It is clean, slide plate is closed, ladle is become a full member, 28 kilograms of sintering temperatures higher (> 1550 DEG C) are first added by stuffing sand plus sand conduit
Common magnesia stuffing sand (i.e. the first stuffing sand), adds the high chromium stuffing sand of 45 kilograms of sintering temperatures lower (1500 DEG C of ≈)
(i.e. the second stuffing sand), it is ensured that the natural packing balling-up of pocket block upper end is coronal.Liquid steel refining time 1h, total pass put time 8h,
Ladle continuous casting is opened when pouring, and slide plate is opened, since commonly magnesia stuffing sand sintering degree is low for lower layer, in the feelings for losing skid plates support power
Under condition, since self gravity is voluntarily flowed out from filling pipe end；And the sinter layer for the suitable thickness that the high chromium stuffing sand on upper layer is formed exists
In the case where losing lower layer's sand and skid plates support power, sinter layer is crushed since ferrostatic pressure acts on, so that stuffing sand is certainly
It is dynamic to be flowed out out of filling pipe end and pocket block, so that automatic casting can be realized.
In second stuffing sand of the present embodiment, the mass fraction of chromite is 88%, and the granularity of chromite is 14~100
Mesh, Cr in chromite2O3Mass fraction >=47.0%；The mass fraction of titanium aluminic acid calcisphere is 12%, and the granularity of titanium aluminic acid calcisphere is
14~40 mesh.
Embodiment 8
250 tons of converter ladles are 1600~1650 DEG C of Tapping Temperature of Bof, new to build because baking condition limits because of working condition
Packet, overhaul packet, in repair and wrap line before, wrap about 650 DEG C of bottom temperature.After pouring molten steel, staff to pocket block and on
Mouth of a river internal residual steel slag is cleaned, and closes slide plate, ladle is become a full member, first adds 30 kilograms of burnings by stuffing sand plus sand conduit
The common chromium matter stuffing sand (i.e. the first stuffing sand) of junction temperature higher (> 1550 DEG C), adds 50 kilograms of lower (≈ of sintering temperature
1450 DEG C) high chromium stuffing sand (i.e. the second stuffing sand), it is ensured that the natural packing balling-up of pocket block upper end is coronal.When liquid steel refining
Between 1h, total pass puts time 3h, when ladle continuous casting, which is opened, to be poured, open slide plate, since the common chromium matter stuffing sand sintering degree of lower layer is low,
In the case where losing skid plates support power, since self gravity is voluntarily flowed out from filling pipe end；And what upper layer Gao Ge stuffing sand was formed
The sinter layer of suitable thickness is in the case where losing lower layer's sand and skid plates support power, due to ferrostatic pressure effect by sinter layer
It crushes, so that stuffing sand is flowed out out of filling pipe end and pocket block automatically, so that ladle automatic casting can be realized.
In second stuffing sand of the present embodiment, the mass fraction of chromite is 92%, and the granularity of chromite is 14~100
Mesh, Cr in chromite2O3Mass fraction >=47.0%；The mass fraction of titanium aluminic acid calcisphere is 4%, and the granularity of titanium aluminic acid calcisphere is
14~40 mesh；The mass fraction that emery is cast in second stuffing sand is 4%, and the granularity for casting emery is 14~40 mesh.
Embodiment 9
250 tons of converter ladles, 1600~1650 DEG C of Tapping Temperature of Bof, pouring molten steel uses robot automatic casting.Steel
After water is poured, staff cleans pocket block and filling pipe end internal residual steel slag, closes slide plate, and ladle is turned
Just, the common quartziferous stuffing sand (i.e. of 28 kilograms of sintering temperatures higher (> 1550 DEG C) is first added by stuffing sand plus sand conduit
One stuffing sand), add the high chromium stuffing sand (i.e. the second stuffing sand) of 60 kilograms of sintering temperatures lower (1500 DEG C of ≈), it is ensured that water
Mouth brick cup upper end natural packing balling-up is coronal.Liquid steel refining time 2h, total pass puts time 4h, when ladle continuous casting, which is opened, to be poured, opens
Slide plate, since the common quartziferous stuffing sand sintering degree of lower layer is low, in the case where losing skid plates support power, due to self gravity
It is voluntarily flowed out from filling pipe end；And the sinter layer for the suitable thickness that upper layer Gao Ge stuffing sand is formed is losing lower layer's sand and skid plates support
In the case where power, sinter layer is crushed since ferrostatic pressure acts on, so that stuffing sand is automatically from filling pipe end and pocket block
Interior outflow, so that ladle automatic casting can be realized.
In second stuffing sand of the present embodiment, the mass fraction of chromite is 94%, and the granularity of chromite is 14~100
Mesh, Cr in chromite2O3Mass fraction >=47.0%；The mass fraction for casting emery is 6%, and the granularity for casting emery is 14~40 mesh.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula carries out change and modification appropriate.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to this
Some modifications and changes of invention should also be as falling into the scope of the claims of the present invention.In addition, although this specification
In use some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (10)
1. a kind of stuffing sand interstitital texture for refining ladle, the refining ladle includes positioned at refining ladle bottom and passing through
The filling pipe end and collector nozzle that sled mechanism is mutually butted, the periphery of filling pipe end are equipped with pocket block, the pocket block be equipped with it is upper
The inner hole that the mouth of a river is connected, which is characterized in that the stuffing sand interstitital texture includes: to be filled in from the bottom to top under use state
The first stuffing sand and the second stuffing sand in the mouth of a river and pocket block inner hole, sintering temperature > 1500 DEG C of first stuffing sand,
The sintering temperature of second stuffing sand is 1450~1500 DEG C.
2. being used for the stuffing sand interstitital texture of refining ladle as described in claim 1, which is characterized in that be filled in filling pipe end
First stuffing sand is filled with first stuffing sand and the second stuffing sand in pocket block inner hole.
3. being used for the stuffing sand interstitital texture of refining ladle as described in claim 1, which is characterized in that second stuffing sand
The part natural packing being exposed to outside pocket block inner hole is spherical crown shape.
4. being used for the stuffing sand interstitital texture of refining ladle as described in claim 1, which is characterized in that pocket block inner hole packet
It includes: the straightway that is connected to each other with filling pipe end and being mutually connected with straightway and along the taper being gradually flared away from filling pipe end direction
Section, the straightway is interior to be filled with first stuffing sand, is filled with second stuffing sand in the conical section.
5. such as the described in any item stuffing sand interstitital textures for refining ladle of Claims 1 to 4, which is characterized in that described
First stuffing sand is at least one of chromium matter stuffing sand, quartziferous stuffing sand, magnesia stuffing sand.
6. being used for the stuffing sand interstitital texture of refining ladle as claimed in claim 5, which is characterized in that second stuffing sand
Including at least one of chromite and following component:
A) titanium aluminic acid calcisphere；
B) emery is cast.
7. being used for the stuffing sand interstitital texture of refining ladle as claimed in claim 6, which is characterized in that chromium in the second stuffing sand
The mass fraction of iron ore is not less than 85%.
8. being used for the stuffing sand interstitital texture of refining ladle as claimed in claim 6, which is characterized in that chromium in the second stuffing sand
The granularity of iron ore is 14~100 mesh, Cr in chromite2O3Mass fraction >=47.0%.
9. being used for the stuffing sand interstitital texture of refining ladle as claimed in claim 6, which is characterized in that titanium in the second stuffing sand
The mass fraction of aluminic acid calcisphere is 5~15%, and the granularity of titanium aluminic acid calcisphere is 14~40 mesh；The matter of emery is cast in second stuffing sand
Measuring score is 5~15%, and the granularity for casting emery is 14~40 mesh.
10. a kind of stuffing sand for realizing stuffing sand interstitital texture as described in any one of claims 1 to 9 adds sand technique, special
Sign is, includes the following steps:
The first stuffing sand and the second stuffing sand are filled in the filling pipe end and pocket block inner hole being successively connected to refining ladle bottom,
Wherein sintering temperature > 1500 DEG C of the first stuffing sand, the sintering temperature of the second stuffing sand are 1450~1500 DEG C.
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| CN109702179A (en) * | 2019-01-24 | 2019-05-03 | 邯郸钢铁集团有限责任公司 | A kind of process control method improving ladle self-opening rate |
| CN110357644A (en) * | 2019-06-26 | 2019-10-22 | 马鞍山市宁生耐火材料有限责任公司 | A kind of aluminum environment-friendly type stuffing sand and its production technology and application |
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| CN109702179A (en) * | 2019-01-24 | 2019-05-03 | 邯郸钢铁集团有限责任公司 | A kind of process control method improving ladle self-opening rate |
| CN110357644A (en) * | 2019-06-26 | 2019-10-22 | 马鞍山市宁生耐火材料有限责任公司 | A kind of aluminum environment-friendly type stuffing sand and its production technology and application |
| CN110385424A (en) * | 2019-08-30 | 2019-10-29 | 马鞍山钢铁股份有限公司 | A kind of stuffing sand filling sand method for being conducive to improve IF steel cleanness |
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| CN110681851B (en) * | 2019-11-08 | 2021-05-04 | 鞍山市和丰耐火材料有限公司 | Compositely-thrown steel ladle chromium drainage agent with ultrahigh self-pouring rate |
| CN111283181A (en) * | 2020-02-27 | 2020-06-16 | 北京首钢股份有限公司 | Filling method of double-layer drainage sand and application thereof |
| CN111283181B (en) * | 2020-02-27 | 2022-05-24 | 北京首钢股份有限公司 | Filling method of double-layer drainage sand and application thereof |
| CN111906290A (en) * | 2020-07-20 | 2020-11-10 | 东北大学 | Special drainage sand for high-manganese high-aluminum steel and use method |
| CN112247131A (en) * | 2020-09-16 | 2021-01-22 | 德龙钢铁有限公司 | Ladle drainage sand and sand adding method |
| CN113275552A (en) * | 2020-12-08 | 2021-08-20 | 常熟市龙腾特种钢有限公司 | Drainage sand filling method capable of improving self-opening rate of steel ladle |
| CN112872347A (en) * | 2021-01-15 | 2021-06-01 | 山东钢铁集团日照有限公司 | Secondary filling process for ladle drainage sand |
| CN112872347B (en) * | 2021-01-15 | 2022-07-19 | 山东钢铁集团日照有限公司 | Secondary filling process for ladle drainage sand |
| CN114273649A (en) * | 2021-12-31 | 2022-04-05 | 北京瑞普同创科技发展有限公司 | Casting process of sizing quick-change tundish |
| CN114273649B (en) * | 2021-12-31 | 2023-06-02 | 北京瑞普同创科技发展有限公司 | Casting technology of sizing quick-change tundish |
| CN114985718A (en) * | 2022-06-13 | 2022-09-02 | 首钢京唐钢铁联合有限责任公司 | Composite type drainage sand and use method thereof |
| CN114985718B (en) * | 2022-06-13 | 2024-06-07 | 首钢京唐钢铁联合有限责任公司 | Composite drainage sand and use method thereof |
| CN115007845A (en) * | 2022-06-15 | 2022-09-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for filling drainage sand in high-cleanness steel production process |
| CN115007845B (en) * | 2022-06-15 | 2024-03-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Drainage sand filling method in high-clean steel production process |
| CN115156517A (en) * | 2022-08-11 | 2022-10-11 | 西峡龙成冶金材料有限公司 | Upper-layer drainage sand, double-layer drainage sand and application of upper-layer drainage sand and double-layer drainage sand |
| CN115156517B (en) * | 2022-08-11 | 2023-11-07 | 西峡龙成冶金材料有限公司 | Upper drainage sand and double-layer drainage sand and application thereof |
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Address after: 312300 Zhejiang city of Shaoxing province Hangzhou Bay Juxian two East District of Shangyu economic and Technological Development Zone two Road No. 9 Applicant after: Zhejiang Zili High Temperature Technology Co., Ltd Applicant after: Baoshan Iron and Steel Co., Ltd. Address before: 312300 Zhejiang city of Shaoxing province Hangzhou Bay Juxian two East District of Shangyu economic and Technological Development Zone two Road No. 9 Applicant before: ZHEJIANG ZILI HIGH TEMPERATURE TECHNOLOGY CO., LTD. Applicant before: Baoshan Iron and Steel Co., Ltd. |
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Application publication date: 20190122 |