CN115491444B - Method for preventing ladle from adhering and splashing by hot return of ladle casting residue to converter - Google Patents
Method for preventing ladle from adhering and splashing by hot return of ladle casting residue to converter Download PDFInfo
- Publication number
- CN115491444B CN115491444B CN202211051482.4A CN202211051482A CN115491444B CN 115491444 B CN115491444 B CN 115491444B CN 202211051482 A CN202211051482 A CN 202211051482A CN 115491444 B CN115491444 B CN 115491444B
- Authority
- CN
- China
- Prior art keywords
- ladle
- molten iron
- casting
- residues
- molten
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005266 casting Methods 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 62
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 209
- 229910052742 iron Inorganic materials 0.000 claims abstract description 105
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 89
- 239000010959 steel Substances 0.000 claims abstract description 89
- 239000002893 slag Substances 0.000 claims abstract description 62
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000003825 pressing Methods 0.000 claims abstract description 23
- 235000007164 Oryza sativa Nutrition 0.000 claims description 14
- 235000009566 rice Nutrition 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- 240000007594 Oryza sativa Species 0.000 claims 1
- 229910017112 Fe—C Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 238000009749 continuous casting Methods 0.000 description 14
- 241000209094 Oryza Species 0.000 description 13
- 238000007670 refining Methods 0.000 description 9
- 239000000428 dust Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 239000010903 husk Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for preventing ladle sticking and splashing during hot return of ladle casting residue to a converter, and belongs to the technical field of comprehensive utilization of resources. After a certain amount of molten iron which is not desulfurized is put into a molten iron tank, pouring ladle casting residues into the molten iron tank, adding a certain amount of slag pressing materials at the same time, adding a certain amount of slag pressing materials after pouring a packet of casting residues, and stopping continuously receiving the casting residues when the total amount of hot casting residues received by the molten iron tank exceeds 65% of the weight of the molten iron or the clearance height of the material surface of the molten iron tank from a tank opening is less than 500 mm. Aiming at the problems in the prior art, the invention aims to provide a method for preventing ladle sticking and splashing by hot state return of ladle casting residues to a converter, and the mixing proportion of molten iron and casting residues is controlled to regulate the liquidus temperature of Fe-C alloy, so that the superheat degree of the casting residues molten steel is ensured, and the problems of ladle sticking and the like of the molten steel are avoided.
Description
Technical Field
The invention relates to the technical field of comprehensive utilization of resources, in particular to a method for preventing ladle from adhering and splashing by hot return of ladle casting residues to a converter.
Background
The casting residue is a mixture of molten steel and slag remaining in the ladle after the molten steel is cast, and the temperature thereof is usually about 1500 ℃. The molten steel amount in the casting residue is larger and about 50%, so that the method has good recovery value, especially IF steel and the like are used for ensuring that downstream products avoid metallurgical defects, the steel remaining amount is much more than that of common steel types, the molten steel amount is also more, and the recovery value is higher.
Currently, most iron and steel enterprises use slag tanks to collect casting residues. In order to effectively recycle the heat of casting residues, some domestic steel factories directly return the hot liquid casting residues to ladles, converters and the like, but the return rate is not very high due to the restrictions of steel types, site conditions and the like, and the problems of ladle sticking of molten steel, splashing in the slag receiving process and the like are easy to occur. Therefore, a method for hot return of ladle casting residues to a converter is urgently needed to be designed, the casting residues can be effectively recovered, and meanwhile, the problems of ladle sticking and slag receiving process splashing of molten steel can be effectively solved.
Through searching, the prior technology for returning hot casting residues to a converter is disclosed in patent literature, for example, the application number of Chinese patent literature is as follows: 201810207217.8, the invention is named: a molten steel recovery method of hot casting residue back-iron ladle is characterized by that the multi-ladle casting residue is received and circulated by means of heat-insulating furnace set up in molten steel receiving span, and the heat-insulating furnace is used for supplementing heat to casting residue, so that it can be kept in molten state, and can prevent the molten steel from sticking to ladle due to the temp. drop of molten steel in the course of receiving multi-ladle casting residue.
For another example, the application number of the Chinese patent literature is: 201811557461.3, the invention is named: a method for cyclic utilization of ladle hot casting residue by converter includes such steps as pouring hot casting residue into desulfurized ladle, and cyclic recovery of hot casting residue.
And the application number of the Chinese patent literature is as follows: 201310296172.3 the invention is named: a method for treating continuous casting hot steel slag, which uses the hot refined steel slag left after continuous casting steel as refining slag to recycle in the next ladle of molten steel. According to the scheme, aiming at the steel grade with low requirements on molten steel cleanliness, the residual refining slag after continuous casting is directly returned to the next ladle of molten steel, caO in the refining slag is fully utilized for carrying out molten steel desulfurization treatment, but the scheme has the problems that aiming at a high-calcium type refining slag system, the effect on the high-Al type refining slag system is not ideal, the S content in the residual refining slag after continuous casting is generally higher, and the desulfurization effect on the next ladle of molten steel is influenced to a certain extent.
At present, if the hot casting residue is returned to a converter for use, the technical scheme is that if the hot casting residue is directly returned to a refining furnace for use, the method has limitation in the aspect of selecting a cyclic refining slag system, has a good effect on high-calcium refining slag, and has the problem that the S content of the hot casting residue per se is high to influence the desulfurization effect of the next ladle of molten steel; if the steel is directly returned to the converter for use, the problems that the steel water temperature is reduced in viscosity, the casting residues are oxidized strongly and are easy to splash, the heat supplement quantity of the heat preservation furnace is increased, the energy consumption is increased and the like exist.
Disclosure of Invention
1. Technical problem to be solved by the invention
Aiming at the problems in the prior art, the invention aims to provide a method for preventing ladle sticking and splashing by hot state return of ladle casting residues to a converter, and the mixing proportion of molten iron and casting residues is controlled to regulate the liquidus temperature of Fe-C alloy, so that the superheat degree of the casting residues molten steel is ensured, and the problems of ladle sticking and the like of the molten steel are avoided.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the invention relates to a method for preventing ladle from sticking and splashing by hot state return of ladle casting residues, which is characterized in that after a certain amount of non-desulfurized molten iron is put into a molten iron tank, ladle casting residues are poured into the molten iron tank, a certain amount of slag pressing materials are added, after one ladle of casting residues is poured, a certain amount of slag pressing materials are added, and when the total amount of hot state casting residues received by the molten iron tank exceeds 65% of the weight of the molten iron, or the clearance height of the material surface of the molten iron tank from a tank opening is less than 500mm, continuous receiving of casting residues is stopped.
As a further improvement of the invention, after the molten iron tank receives casting residues, the carbon content in molten steel after mixing in the molten iron tank is controlled to be not lower than 2.5 percent, and the liquidus temperature of the molten steel after mixing is controlled to be not higher than 1350 ℃.
As a further improvement of the invention, the weight of the slag pressing material added after pouring the casting slag in one package is not more than 0.05 percent of the weight of the casting slag in one package.
As a further improvement of the invention, the slag pressing material is a carbon-containing solid granular substance, and the content of C in the slag pressing material is larger than or equal to 20 percent.
As a further improvement of the invention, the slag pressing material is carbonized rice hulls.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) According to the ladle casting residue hot state return converter utilizing the method for preventing sticking and splashing, a certain amount of non-desulfurized molten iron is put into the molten iron tank, the molten iron tank is moved to the vicinity of the continuous casting table, the ladle casting residue is poured into the molten iron tank, a certain amount of slag pressing materials are added at the same time, and after one ladle of casting residue is poured, a certain amount of slag pressing materials are added, so that the molten iron tank filled with molten iron can bear a plurality of hot state casting residues according to the method, the working benefit and the transfer cost of the casting residue are greatly improved, and the splashing problem caused by strong oxidizing property of the hot state casting residue can be effectively prevented.
(2) The invention relates to a method for preventing ladle sticking and splashing by hot return of ladle casting residue to a converter, which is characterized in that the casting residue is a mixture of molten steel and slag remained in a ladle after molten steel is cast, the temperature is usually about 1500 ℃, the liquidus temperature of Fe-C alloy is regulated and controlled by adopting the mixing proportion of molten iron and casting residue and adopting the Fe-C binary phase diagram theory, the interface temperature of slag steel in a ladle is always higher than the liquidus temperature of the slag steel, thereby ensuring the superheat degree of the casting residue molten steel and avoiding the problems of ladle sticking and the like of the molten steel.
(3) According to the method for preventing ladle sticking and splashing by the ladle casting residue hot return converter, disclosed by the invention, a certain proportion of carbonized rice hulls are added as slag pressing materials in the process of pouring slag, so that splashing caused by the strengthening property of the casting residue can be effectively avoided, meanwhile, the molten steel can be carburised and put in, the liquidus temperature of the molten steel is further reduced, and ladle sticking of the molten steel is further prevented.
(4) According to the method for preventing ladle sticking and splashing by utilizing the ladle casting residue hot state return converter, disclosed by the invention, the physical distribution characteristics of a steelmaking process and the influence of the C content in molten iron on the liquidus temperature are utilized, so that the hot state casting residue is efficiently returned to the converter for recycling.
Detailed Description
The present invention will be described in detail for further understanding of the present invention.
The invention is further described below with reference to examples.
Example 1
According to the method for preventing ladle from sticking and splashing by the ladle casting residue hot-state return converter, after a certain amount of non-desulfurized molten iron is put into the molten iron tank, the molten iron tank is moved to the vicinity of the continuous casting table, ladle casting residue is poured into the molten iron tank, a certain amount of slag pressing materials are added at the same time, after one ladle of casting residue is poured, a certain amount of slag pressing materials are added, according to the method, the molten iron tank filled with molten iron can bear a plurality of hot-state casting residues, so that the working benefit and the transfer cost of casting residues are greatly improved, and the splashing problem caused by strong oxidizing property of the hot-state casting residue can be effectively prevented. And stopping continuously receiving the casting residues when the total amount of the hot casting residues received by the hot metal ladle exceeds 65% of the weight of molten iron or the clearance height of the material surface of the hot metal ladle from the ladle opening is less than 500 mm.
In this embodiment, the weight of the molten iron is determined according to the amount of casting slag that the ladle is intended to receive at most. After the molten iron tank receives the casting residue, controlling the carbon content in the molten steel after mixing in the molten iron tank to be not lower than 2.5%, and controlling the liquidus temperature of the molten steel after mixing to be not higher than 1350 ℃, wherein the temperature of the molten steel after mixing is usually about 1500 ℃ because the casting residue is a mixture of molten steel and slag remained in a ladle after the molten steel is cast, and controlling the liquidus temperature of Fe-C alloy by controlling the mixing proportion of the molten iron and the casting residue through applying the Fe-C binary phase diagram theory, so as to ensure that the interface temperature of slag and steel in the molten iron tank is always higher than the liquidus temperature of the molten steel, thereby ensuring the superheat degree of the casting residue molten steel and avoiding the problems of molten steel sticking the ladle and the like.
In this embodiment, the weight of the slag pressing material added after pouring the casting slag is not more than 0.05% of the weight of the casting slag. The slag pressing material is a carbon-containing solid granular substance, and the content of C in the slag pressing material is larger than or equal to 20%. Specifically, in this embodiment, the slag compacting material is carbonized rice hulls. In the embodiment, a certain proportion of carbonized rice husk is added as a slag pressing material in the slag pouring process, so that splashing caused by the strengthening property of casting residues can be effectively avoided, meanwhile, the carburetion and placement effect can be achieved on molten steel, the liquidus temperature of the molten steel is further reduced, and the molten steel is further prevented from adhering to a ladle. By adopting the method for utilizing the hot state return converter of the ladle casting residue, the problem that the molten steel sticks to the ladle due to temperature drop existing in the utilization of the hot state casting residue by controlling the mixing proportion of molten iron and casting residue is solved; by adding a certain proportion of carbonized rice hulls after deslagging and deslagging are finished, the problem that splashing is easy to occur due to strong oxidizing property of casting residue is solved, and the superheat degree of molten steel can be improved; meanwhile, the physical distribution characteristics of the steelmaking process and the influence of the C content in the molten iron on the liquidus temperature are utilized, so that the hot casting residue is efficiently returned to the converter for recycling.
Specifically, in the embodiment, a 300t molten iron tank is added with 98t molten iron, the molten iron tank is conveyed to a lower part of a continuous casting table through a crossing track, the molten iron tank is lifted to a designated station, the as-cast IF steel ladle casting residue is poured into the molten iron tank, the weight is 8.2 tons, 45kg of carbonized rice hulls are added in the process of pouring, 45kg of carbonized rice hulls are added after the residue pouring is finished, the molten iron tank is stood for waiting for pouring the next ladle casting residue, thus the circulation process lasts for 230 minutes, 5 ladle IF steel ladle casting residue is poured, the accumulated weight of casting residue is 41.6 tons, the weight of the molten iron accounts for 42.4 percent, the carbon content of the molten steel after mixing is 3.0 percent, the corresponding liquidus temperature is 1290 ℃, the slag steel interface temperature is 1360 ℃, the gap height of the molten iron tank material surface is about 1000mm from a tank opening, and the molten iron tank is transferred to a converter operation area, so that no sticking or splashing phenomenon occurs in the whole process.
Example 2
The basic operation of the method for preventing ladle from sticking and splashing by using the ladle casting residue hot state return converter in the embodiment is consistent with that of the embodiment 1, and the method is characterized in that in the embodiment, 300t of molten iron is added into 101t of molten iron, the molten iron is conveyed to a continuous casting table through a crossing track, the molten iron is lifted to a designated station, the as-cast IF steel ladle casting residue is poured into the molten iron tank, the weight is 7.5 tons, 40kg of carbonized rice husk is added in the pouring process, 40kg of carbonized rice husk is added after the pouring process is finished, the casting residue is left to stand for the pouring of the next ladle casting residue, the total time is 350 minutes, 7 ladles of IF steel ladle casting residue is poured into, the total weight of casting residue is 63.5 tons, the carbon content of molten steel after mixing is 2.6%, the corresponding liquidus temperature is 1350 ℃, the interface temperature of slag steel is 1360 ℃, the clearance of the ladle is about 700mm from a ladle opening, and the phenomenon that the molten iron tank is transferred to a converter operation area is not sticky or splashed in the whole process.
Example 3
The basic operation of the method for preventing ladle from sticking and splashing by using the ladle casting residue hot state return converter in the embodiment is consistent with that of the embodiment 1, and the method is characterized in that in the embodiment, 300t of molten iron is added into 100t of molten iron, the molten iron is conveyed to a continuous casting table through a crossing track, lifted to a designated station, the as-cast IF steel ladle casting residue is poured into the molten iron tank, the weight is 7.2 tons, 40kg of bagged carbonized rice husk is added in the pouring process, 40kg of carbonized rice husk is added after the pouring process is finished, the casting residue is left to stand for the pouring of the next ladle casting residue, the cycle process lasts 335 minutes, the pouring of 6 ladles of IF steel ladle casting residue takes 55.7 tons, the carbon content of molten steel after mixing is 2.7%, the corresponding liquidus temperature is at a temperature of 1360 ℃, the gap temperature of the slag steel interface is about 650mm from a ladle opening, the phenomenon of transferring the molten iron to a converter operation area is avoided, and the phenomenon of sticking or splashing does not occur in the whole process.
Example 4
The basic operation of the method for preventing sticking and splashing by using a ladle casting residue hot state return converter in the embodiment is consistent with that of the embodiment 1, and the method is different in that 300t of molten iron ladle is added into 97t of molten iron, the molten iron is conveyed to a continuous casting table through a crossing track, lifted to a designated station, the as-cast IF steel ladle casting residue is poured into the molten iron ladle, the weight is 7.5 tons, 40kg of bagged blast furnace dry dust is added in the pouring process, 40kg of blast furnace dry dust is added after the pouring process is finished, the next ladle casting residue is left to stand for the next pouring of ladle casting residue, thus the cycle process lasts for 244 minutes, 5 ladles of IF steel ladle casting residue is poured into, the accumulated weight of casting residue is 36.2 tons, the total weight of molten iron accounts for 37.3 percent, the carbon content of molten steel after mixing is 3.3 percent, the corresponding liquidus temperature is 1250 ℃, the slag steel interface temperature is 1370 ℃, the clear height of the molten iron ladle is about 1100mm from a ladle opening, and the phenomenon of sticking or splashing does not occur in the whole process.
Example 5
The basic operation of the method for preventing sticking and splashing by using a ladle casting residue hot state return converter in the embodiment is consistent with that of the embodiment 1, and the method is different in that in the embodiment, 300t of molten iron ladle is added into 103t of molten iron, the molten iron is conveyed to a continuous casting table through a crossing track, the molten iron is lifted to a designated station, the as-cast IF steel ladle casting residue is poured into the molten iron ladle, the weight is 8.3 tons, 45kg of bagged blast furnace dry dust is added in the pouring process, 45kg of blast furnace dry dust is added after the pouring process is finished, the next ladle casting residue is left to stand for the next ladle casting residue to be poured in, thus the cycle lasts 339 minutes, 6 ladles of IF steel ladle casting residue is poured into the converter, the accumulated weight of casting residue is 46.3 tons, the weight of molten iron occupies 44.9 percent, the carbon content of molten steel after mixing is 3.1 percent, the corresponding liquidus temperature is 1270 ℃, the interface temperature of slag steel is 1360 ℃, the clearance of the ladle is about 600mm from a ladle mouth, and the ladle is transferred to a converter operation area, and no sticking or splashing occurs in the whole process.
Example 6
The basic operation of the method for preventing ladle from sticking and splashing by using the hot return converter of ladle casting residues in the embodiment is consistent with that of the embodiment 1, and the method is different in that 300t of molten iron is added into 102t of molten iron in the embodiment, the molten iron is conveyed to a continuous casting table through a crossing track, the molten iron is lifted to a designated station, the as-cast IF steel ladle casting residues are poured into the molten iron tank, the weight is 8.0 tons, 48kg of bagged blast furnace dry dust is added in the pouring process, 48kg of blast furnace dry dust is added after the pouring process is finished, the next ladle casting residues are left to stand for the next ladle casting residues to be poured in, the circulation process lasts for 326 minutes, 6 ladles of IF steel ladle casting residues are poured into the converter, the accumulated weight of the casting residues accounts for 46.7 percent of the weight of molten iron, the carbon content of molten steel after mixing is 3.1 percent, the corresponding liquidus temperature is 1270 ℃, the slag interface temperature is 1360 ℃, the clearance of the molten iron tank surface is about 650mm from a tank opening, and the phenomenon of no ladle sticking or splashing occurs in the whole process.
Comparative example 1
In the comparative example, 50t molten iron is added into a 300t molten iron tank, the molten iron is conveyed to a continuous casting table through a crossing track, the molten iron tank is lifted to a designated station, the as-cast IF steel ladle casting residue is poured into the molten iron tank, the weight is 7 tons, 40kg of carbonized rice hulls are added in the slag pouring process, 40kg of carbonized rice hulls are added after the slag pouring is finished, the molten iron tank is stood for the next ladle casting residue to be poured into the converter, the cycle process lasts for 236 minutes, 5 ladle IF steel ladle casting residue is poured, the total weight of the casting residue is 39.8 tons, the weight of the casting residue accounts for 79.6 percent of the weight of the molten iron, the carbon content of the molten steel after mixing is 2.3 percent, the corresponding liquidus temperature is 1390 ℃, the slag steel interface temperature is 1360 ℃, the clearance height between the molten iron tank surface and a tank opening is about 1000mm, the molten iron tank is transferred to a converter operation area, and the molten iron tank bottom and the tank wall of the converter is subjected to molten steel sticking phenomenon.
Comparative example 2
In the comparative example, 300t of molten iron is added into 102t of molten iron, the molten iron is conveyed to a continuous casting table through a crossing track, the molten iron is lifted to a designated station, the as-cast IF steel ladle casting residues are poured into the molten iron tank, the weight is 7.6 tons, no slag pressing material is added, the casting residues stand for the next ladle of casting residues, the cycle process lasts for 330 minutes, 6 ladles of IF steel ladle casting residues are poured, the total weight of casting residues is 45.6 tons, the weight of the casting residues accounts for 44.7 percent of the weight of the molten iron, the carbon content of the mixed molten steel is 2.9 percent, the corresponding liquidus temperature is 1330 ℃, the slag steel interface temperature is 1360 ℃, the clearance between the molten iron tank and a ladle opening is about 650mm, no sticking phenomenon occurs, but severe oxidization occurs in the slag pouring process, and splashing occurs in the following 2 ladles of casting residues in the slag pouring process seriously along with the rise of the material surface in the molten iron tank.
The invention and its embodiments have been described above by way of illustration and not limitation. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.
Claims (1)
1. A method for preventing ladle from adhering and splashing by utilizing ladle casting residue hot return converter is characterized in that: pouring a certain amount of molten iron which is not desulfurized into a molten iron tank, pouring ladle casting residues into the molten iron tank, adding a certain amount of slag pressing materials at the same time, adding a certain amount of slag pressing materials after pouring a ladle of casting residues, and stopping continuously receiving the casting residues when the total amount of hot casting residues received by the molten iron tank exceeds 65% of the weight of the molten iron or the clearance height of the material surface of the molten iron tank from a tank opening is less than 500 mm; after the molten iron tank receives casting residues, controlling the carbon content in molten steel after mixing in the molten iron tank to be not lower than 2.5%, controlling the liquidus temperature of the mixed molten steel to be not higher than 1350 ℃, wherein the slag pressing material is carbonized rice hulls, the weight of the slag pressing material added after pouring one package of casting residues is not more than 0.05% of the weight of the package of casting residues, and the C content in the slag pressing material is not less than 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211051482.4A CN115491444B (en) | 2022-08-30 | 2022-08-30 | Method for preventing ladle from adhering and splashing by hot return of ladle casting residue to converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211051482.4A CN115491444B (en) | 2022-08-30 | 2022-08-30 | Method for preventing ladle from adhering and splashing by hot return of ladle casting residue to converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115491444A CN115491444A (en) | 2022-12-20 |
| CN115491444B true CN115491444B (en) | 2024-01-30 |
Family
ID=84466287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211051482.4A Active CN115491444B (en) | 2022-08-30 | 2022-08-30 | Method for preventing ladle from adhering and splashing by hot return of ladle casting residue to converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115491444B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020025266A (en) * | 2000-09-28 | 2002-04-04 | 이구택 | Desulphurizer by using ladle slag and a method for producing thereof |
| CN102181588A (en) * | 2011-03-22 | 2011-09-14 | 重庆中渣冶金再生资源有限公司 | Method for recycling refined casting residues during steelmaking in steel plant |
| CN103333980A (en) * | 2013-07-12 | 2013-10-02 | 鞍钢股份有限公司 | Recycling method of casting slag |
| CN105290345A (en) * | 2015-10-23 | 2016-02-03 | 首钢京唐钢铁联合有限责任公司 | Treatment method for steel ladle casting remaining liquid steel |
| CN106811576A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | A kind of hot circulation utilization method of vessel slag |
| CN113102712A (en) * | 2021-04-15 | 2021-07-13 | 马鞍山钢铁股份有限公司 | Steel ladle casting residue recycling method suitable for ultra-low carbon steel |
| CN114317870A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Method for directly returning hot-state casting residue to converter |
-
2022
- 2022-08-30 CN CN202211051482.4A patent/CN115491444B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020025266A (en) * | 2000-09-28 | 2002-04-04 | 이구택 | Desulphurizer by using ladle slag and a method for producing thereof |
| CN102181588A (en) * | 2011-03-22 | 2011-09-14 | 重庆中渣冶金再生资源有限公司 | Method for recycling refined casting residues during steelmaking in steel plant |
| CN103333980A (en) * | 2013-07-12 | 2013-10-02 | 鞍钢股份有限公司 | Recycling method of casting slag |
| CN105290345A (en) * | 2015-10-23 | 2016-02-03 | 首钢京唐钢铁联合有限责任公司 | Treatment method for steel ladle casting remaining liquid steel |
| CN106811576A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | A kind of hot circulation utilization method of vessel slag |
| CN114317870A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Method for directly returning hot-state casting residue to converter |
| CN113102712A (en) * | 2021-04-15 | 2021-07-13 | 马鞍山钢铁股份有限公司 | Steel ladle casting residue recycling method suitable for ultra-low carbon steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115491444A (en) | 2022-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105506226B (en) | A kind of method that hot metal desiliconization, pre- decarburization and pre- dephosphorization are carried out in hot-metal bottle | |
| WO2009110627A1 (en) | Process for removal of copper contained in steel scraps | |
| CN110273047A (en) | A kind of hot casting residue returns the molten steel recovery method of ladle | |
| CN114317870A (en) | Method for directly returning hot-state casting residue to converter | |
| CN104561452A (en) | Device and method for single snorkel vacuum degassing refining of molten steel by employing bottom injection | |
| CN102719588A (en) | Slag washing desulphurization method for molten iron utilizing residue thermal-state steel slag | |
| CN115491444B (en) | Method for preventing ladle from adhering and splashing by hot return of ladle casting residue to converter | |
| CN102094103B (en) | Method for increasing endpoint carbon content of converter | |
| TW201416456A (en) | Refine method of hot metal | |
| CN113444855B (en) | Smelting method utilizing residual steel and residual slag in steel ladle | |
| CN114540568B (en) | Smelting method for improving scrap steel ratio | |
| CN116179794A (en) | Technological method for continuously recycling hot casting residue into LF ladle furnace | |
| CN111748670A (en) | Method for improving chromium ore reduction by bottom blowing oxygen-lime powder | |
| CN108788112A (en) | A kind of the environment protecting thermal insulating lid and application method of disposable hot metal transport tank | |
| JP5549198B2 (en) | Steel making method using steel scrap | |
| CN211079224U (en) | Movable preheats device of steel scrap | |
| CN113088620A (en) | Maintenance method of furnace lining of vanadium extraction device | |
| SK113196A3 (en) | Method for producing half-finished product for the metallurgical treatment, half-finished product made by this way and device for producing it | |
| CN114250340B (en) | RH desulfurization method | |
| CN114959156B (en) | Method for thermal state tempering and modification of molten iron desulphurization slag | |
| CN218811876U (en) | Electromagnetic stirring and bottom blowing combined type molten iron pretreatment desulphurization unit | |
| JP4772454B2 (en) | Hot metal refining method | |
| CN114934140B (en) | Organization process for reducing molten iron temperature drop | |
| US9663838B2 (en) | Metal recovery method | |
| CN112176149B (en) | Liquid metal refining device, liquid metal smelting system and refining method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |