CN114657301A - Device transformation method for treating molten iron backflow - Google Patents
Device transformation method for treating molten iron backflow Download PDFInfo
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- CN114657301A CN114657301A CN202210310736.3A CN202210310736A CN114657301A CN 114657301 A CN114657301 A CN 114657301A CN 202210310736 A CN202210310736 A CN 202210310736A CN 114657301 A CN114657301 A CN 114657301A
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- parts
- molten iron
- skimmer
- slag
- steel
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 65
- 238000011426 transformation method Methods 0.000 title abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000011819 refractory material Substances 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 12
- 239000002023 wood Substances 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 5
- 235000011613 Pinus brutia Nutrition 0.000 claims description 5
- 241000018646 Pinus brutia Species 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 239000000701 coagulant Substances 0.000 claims description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 150000004684 trihydrates Chemical class 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229920002050 silicone resin Polymers 0.000 claims description 3
- 230000009172 bursting Effects 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 claims 2
- 239000002893 slag Substances 0.000 abstract description 40
- 238000005422 blasting Methods 0.000 abstract description 7
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CCDWGDHTPAJHOA-UHFFFAOYSA-N benzylsilicon Chemical compound [Si]CC1=CC=CC=C1 CCDWGDHTPAJHOA-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
-
- 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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
-
- 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
-
- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
-
- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
-
- 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
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
- C04B2235/3865—Aluminium nitrides
-
- 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
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/405—Iron group metals
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/66—Heat exchange
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/80—Interaction of exhaust gases produced during the manufacture of iron or steel with other processes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Metallurgy (AREA)
- Structural Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Blast Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
The invention relates to the technical field of slag iron treatment in blast furnace production of metallurgical enterprises, and discloses a device transformation method for treating molten iron backflow, which comprises the following steps: s1: cleaning the residual materials in the main channel and the skimmer by using a tool; s2: the width of tunnels on two sides of a main channel of the skimmer is enlarged by 30-32cm respectively, and the depth is increased by 18-20 cm; s3: according to the specific size, a steel large well and small well passageway mold is newly manufactured; s4: and (5) installing a steel mould, and dropping the position of the skimmer by 10-12 cm. The invention ensures that molten iron can safely and smoothly pass through the slag skimmer, eliminates the phenomenon of molten iron recharging, avoids blasting hidden danger caused by molten iron flowing into a slag runner, reduces the impact and erosion force of the small well wall of the skimmer, and avoids the molten iron leakage accident caused by local burning-through of the iron storage device.
Description
Technical Field
The invention relates to the technical field of slag iron treatment in blast furnace production of metallurgical enterprises, in particular to a device transformation method for treating molten iron backflow.
Background
The working state of the skimmer plays an important role during tapping of the blast furnace, the skimmer consists of a front groove (a large well), a sand dam, a large gate, a groove head, a passage hole, a small well, a sand hole and a main iron groove, and the basic working principle is to separate iron slag by utilizing the specific gravity difference of the iron slag and the slag. The slag and the molten iron flowing out of the iron notch flow to the skimmer through the main channel, and the molten iron is heavy and sinks below the skimmer, while the molten slag is light and floats above the skimmer to generate slag and iron layering. Under the action of a ditch head at an outlet of the skimmer, a small pit and a small well which are connected by the through hole are filled with molten iron, and the through hole can only pass the molten iron; the large gate plays a role of a retaining wall, the molten slag is retained in front of the large gate, when the molten slag reaches a certain thickness on the molten iron surface, the sand hill is properly cut down, and the molten slag flows into the slag discharge groove.
The central task of the slag skimmer is to ensure that slag and iron are separated, the slag is not excessive and has no slag, and the slag and iron cannot overflow, so that normal and safe production is ensured; when the slag skimmer works, whether all parts are damaged or not must be checked, the parts are timely found, repaired and baked in time, residual iron is cleaned, and tools are prepared. When the skimmer is treated, the crust is opened, and a sand hole, a sand dam and a sand hill are well blocked. When the tapping begins to have slag, properly scattering a layer of heat preservation material on the surface of the slag iron of the skimmer; pushing down the sand hill on the slag discharging groove according to the regulation so as to enable slag to flow out, observing the change of the skimmer in the tapping process, pushing away a residue sand dam after the iron port is confirmed to be sealed, discharging the residue in the main groove, and spreading a heat insulating material on the surface of the molten iron after the slag flows out.
If the newly manufactured skimmer is not baked, blasting accidents are easily caused, and the newly repaired skimmer is not firmly repaired to cause floating ships, so that the wall is burnt and leaked, accidents are caused, and people and equipment are easily burned. The slag skimmer has a large hole, and when slag is contained in iron, the molten iron tank is easy to crust. The sand dam is not firm or the sand dam is pushed too early or too low, so that iron in the discharged slag is over-discharged, slag runner explosion is easy to cause personnel injury.
Because the design and the installation structure of the skimmer are unreasonable, the liquid level of the main runner is high, the hidden danger that molten iron is poured back to burn out an iron notch exists, the drop height of the skimmer is small, and the slag runner is easily doped with the molten iron when the slag flows into the slag runner, so that the hidden danger of blasting of the slag runner is caused.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, an iron notch is burnt out by molten iron recharging, the drop height of a skimmer is small, and molten iron is easily doped when slag flows into a slag runner, so that the blasting hidden danger of the slag runner is caused, and the method for modifying the device for treating the molten iron backflow is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for modifying a device for treating molten iron backflow comprises the following steps:
s1: cleaning the residual materials in the main channel and the skimmer by using a tool;
s2: the width of tunnels on two sides of a main channel of the skimmer is enlarged by 30-32cm respectively, and the depth is increased by 18-20 cm;
s3: according to the specific size, a steel large well and small well passageway mold is newly manufactured;
s4: installing a steel mould, and fixing the skimmer by dropping 10-12cm and the small well by dropping 15-17 cm;
s5: fully stirring the refractory materials, and pouring each part;
s6: after pouring, introducing smoke generated in the other normal-working ladle refining furnaces into the main channel, baking the surface of the steel mould, and dismantling the steel mould after 2-3 hours;
s7: igniting the prepared wood, and heating in a big well and a small well;
s8: baking is continued for 6 h.
Preferably, in the step S2, after the width of the pits on both sides of the main trench is widened, the surfaces of the pits are trimmed to maintain the surfaces horizontal.
Preferably, in the step S3, air outlets are reserved in advance on the steel mold to serve as channels for discharging water and air in the refractory material, so as to prevent the refractory material from bursting during baking and heating.
Preferably, in the step S4, when the steel mold is fixed, the hanger applies an upward pulling force to the steel mold to suspend the steel mold, so as to reduce the pressure applied to the main trench by the steel mold, and prevent the steel mold from being deformed due to the stress applied to the main trench, thereby preventing the position of the steel mold from moving.
Preferably, in the step S5, the refractory material includes the following components in parts by weight: 10-13 parts of mica powder, 5-8 parts of aluminum nitride, 4-6 parts of coke powder, 15-20 parts of kaolin clay, 8-11 parts of nickel-based alloy powder, 7-9 parts of limestone, 10-12 parts of silicon dioxide, 11-14 parts of benzyl silicone resin, 6-7 parts of alumina trihydrate, 5-7 parts of a coagulant and 4-7 parts of a binding agent.
Preferably, in the step S7, the wood is pine wood, the pine wood is broken into small pieces, and the small pieces are dried; when wood is combusted in the big well and the small well, oxygen is supplied to the flame center.
Compared with the prior art, the invention provides a device transformation method for treating molten iron backflow, which has the following beneficial effects:
1. according to the device transformation method for treating molten iron backflow, the channel height of the skimmer is adjusted, the front and rear fall of the main ditch is increased, the liquid level height of molten iron stored in the main ditch is reduced, the molten iron can safely and smoothly pass through the skimmer, the molten iron recharging phenomenon is eliminated, the blasting hidden danger caused by the fact that the molten iron flows into the slag ditch is avoided, the impact and erosion force of the small well wall body of the skimmer is reduced, and the molten iron leakage accident caused by local burning-through of the skimmer is avoided.
2. According to the device transformation method for treating molten iron backflow, smoke generated in the other normal working ladle refining furnaces is introduced into the main channel, the surface of the steel mould is baked, so that a refractory material in the steel mould is heated, the solidification speed of the refractory material in the steel mould is improved, and waste smoke is recycled.
3. According to the device transformation method for treating molten iron backflow, the air outlet holes are reserved in advance on the steel mould and used as the pore channels for discharging water and air in the refractory material, so that the refractory material is prevented from cracking when being baked and heated.
4. According to the method for modifying the device for treating the molten iron backflow, the refractory material formed by stirring the mica powder, the aluminum nitride, the coke powder, the kaolin clay, the nickel-based alloy powder, the limestone, the silicon dioxide, the phenylmethylsilicone resin, the alumina trihydrate, the coagulant and the binder is greatly improved in high-temperature refractory performance, the linear change rate of the product is small, and the filling effect, the adhesive strength and the wear resistance are good.
The device has the advantages that the parts which are not involved are the same as or can be realized by adopting the prior art, the invention ensures that molten iron can safely and smoothly pass through, eliminates the phenomenon of molten iron recharging, avoids blasting hidden danger caused by the fact that the molten iron flows into a slag runner, reduces the impact and erosion force of a small well wall body of the skimmer, and avoids the molten iron leakage accident caused by local burning-through of the iron storage device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
A method for modifying a device for treating molten iron backflow comprises the following steps:
s1: cleaning the residual materials in the main ditch and the skimmer by using a tool;
s2: expanding the width of the tunnel at two sides of the main trench of the skimmer, respectively increasing by 30cm and by 20cm, and finishing the surface of the tunnel to keep the surface horizontal;
s3: according to the specific size, a large steel well and a small steel well passageway mold is newly manufactured, and air outlet holes are reserved in the steel mold in advance and are used as pore passages for discharging water and air in the refractory material, so that the refractory material is prevented from cracking when being baked and heated;
s4: installing a steel mould, enabling the skimmer to fall for 10cm, enabling the small well to fall for 15cm, fixing, and applying upward pulling force to the steel mould through a hanging bracket when the skimmer is fixed, so that the steel mould is suspended, the pressure applied to the main ditch gallery by the steel mould is reduced, and the phenomenon that the position of the steel mould is moved due to deformation caused by stress of the main ditch gallery is avoided;
s5: fully stirring a refractory material, wherein the refractory material comprises the following components in parts by weight: 10 parts of mica powder, 8 parts of aluminum nitride, 6 parts of coke powder, 15 parts of kaolin clay, 8 parts of nickel-based alloy powder, 9 parts of limestone, 10 parts of silicon dioxide, 14 parts of benzyl silicone resin, 6 parts of alumina trihydrate, 5 parts of a coagulant and 4 parts of a binding agent, so that the high-temperature fire resistance of the refractory material is greatly improved, the linear change rate of the product is small, the refractory material has good filling effect, adhesive strength and wear resistance, and the refractory material formed by stirring is poured on each part;
s6: after pouring, introducing smoke generated in the other normal-working ladle refining furnaces into the main channel, baking the surface of the steel mould to heat the refractory material in the steel mould, improving the solidification speed of the refractory material in the steel mould, recycling waste smoke, and dismantling the steel mould after 3 hours;
s7: breaking pine wood into small pieces, drying, stacking, igniting, supplying oxygen to flame center, and heating in large and small wells;
s8: baking is continued for 6 h.
According to the invention, the integral fall of the skimmer is 30cm, so that the liquid level of the main ditch falls by 10cm, the height of the bottom layer of the skimmer is reduced during pouring by adjusting the channel height of the skimmer, the front and rear fall of the main ditch is increased, the liquid level height of iron stored in the main ditch is reduced, the molten iron can safely and smoothly pass through the skimmer, the phenomenon of molten iron recharging is eliminated, the potential safety hazard of burning out an iron notch is avoided, the transition interval of slag passing through the skimmer is increased, the hidden danger of blasting when the molten iron flows into the slag ditch is avoided, the impact and erosion force of a small well wall body of the skimmer is reduced, and the molten iron leakage accident caused by local burning-through of the iron stored is avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A method for modifying a device for treating molten iron backflow is characterized by comprising the following steps:
s1: cleaning the residual materials in the main channel and the skimmer by using a tool;
s2: the width of tunnels on two sides of a main channel of the skimmer is enlarged by 30-32cm respectively, and the depth is increased by 18-20 cm;
s3: according to the specific size, a steel large well and small well passageway mold is newly manufactured;
s4: installing a steel mould, and fixing the skimmer by dropping 10-12cm and the small well by dropping 15-17 cm;
s5: fully stirring the refractory materials, and pouring each part;
s6: after pouring, introducing smoke generated in the other normal-working ladle refining furnaces into the main channel, baking the surface of the steel mould, and dismantling the steel mould after 2-3 hours;
s7: igniting the prepared wood, and heating in a big well and a small well;
s8: baking is continued for 6 h.
2. The method of modifying an apparatus for processing molten iron backflow according to claim 1, wherein in the step S2, after the width of the excavation on both sides of the main trench is widened, the surface of the excavation is modified to maintain the surface level.
3. The method of claim 1, wherein in the step S3, air outlets are reserved in advance on the steel mold to serve as openings for discharging water and air from the interior of the refractory material, so as to prevent the refractory material from bursting during baking and heating.
4. The method of claim 1, wherein in the step S4, when the steel mold is fixed, the steel mold is suspended by applying an upward pulling force to the steel mold through the hanger, so as to reduce a pressure applied to the main channel by the steel mold, and prevent the position of the steel mold from moving due to deformation of the main channel caused by the force.
5. The method of modifying an apparatus for processing molten iron backflow according to claim 1, wherein in the step S5, the refractory material includes the following components in parts by weight: 10-13 parts of mica powder, 5-8 parts of aluminum nitride, 4-6 parts of coke powder, 15-20 parts of kaolin clay, 8-11 parts of nickel-based alloy powder, 7-9 parts of limestone, 10-12 parts of silicon dioxide, 11-14 parts of benzyl silicone resin, 6-7 parts of alumina trihydrate, 5-7 parts of a coagulant and 4-7 parts of a binding agent.
6. The method of modifying an apparatus for processing molten iron backflow as claimed in claim 1, wherein in the step S7, wood is pine wood, the pine wood is broken into small pieces, and the small pieces are dried; when wood is combusted in the big well and the small well, oxygen is supplied to the flame center.
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