CN105290345A - Treatment method of ladle casting residual molten steel - Google Patents
Treatment method of ladle casting residual molten steel Download PDFInfo
- Publication number
- CN105290345A CN105290345A CN201510700821.0A CN201510700821A CN105290345A CN 105290345 A CN105290345 A CN 105290345A CN 201510700821 A CN201510700821 A CN 201510700821A CN 105290345 A CN105290345 A CN 105290345A
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- Prior art keywords
- ladle
- steel
- molten steel
- residual molten
- slag
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- 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.)
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 184
- 239000010959 steel Substances 0.000 title claims abstract description 184
- 238000005266 casting Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002893 slag Substances 0.000 claims abstract description 89
- 239000000203 mixture Substances 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 32
- 238000003672 processing method Methods 0.000 claims description 23
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 230000007812 deficiency Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 241001062472 Stokellia anisodon Species 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 abstract description 5
- 238000012216 screening Methods 0.000 abstract description 3
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000009628 steelmaking Methods 0.000 description 7
- 230000001590 oxidative effect Effects 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 241001417490 Sillaginidae Species 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to the technical field of steel smelting, in particular to a method for treating ladle casting residual molten steel, which comprises the following steps: controlling the carbon content of the semisteel in the semisteel ladle to be 2.0-3.5%; conveying the semi-steel ladle to a molten steel receiving bay, pouring the residual molten steel into the semi-steel ladle in a grading manner, and mixing the residual molten steel with the semi-steel; carrying out slag salvaging treatment on the steel ladle to remove steel slag generated in the steel ladle; and when the semi-steel ladle reaches the loading capacity of the converter, sending the semi-steel, the residual molten steel and the steel slag mixed in the semi-steel ladle into the converter for smelting. The method for treating the ladle casting residual molten steel directly pours the ladle casting residual molten steel into the half ladle, and then adds the mixture of the half steel, the casting residual molten steel and the steel slag in the half ladle into the converter for smelting, thereby saving the process flow of pouring the ladle casting residual molten steel into the slag pot for solidification and returning the slag pot to the converter for reuse after cutting (or screening), and reducing the treatment cost of the ladle casting residual molten steel. The carbon content of the semisteel in the semisteel ladle is controlled to be 2.0-3.5%, and the violent reaction in the semisteel ladle can be avoided.
Description
Technical field
The present invention relates to smelting iron and steel technical field, particularly a kind of processing method of ladle casting residual molten steel.
Background technology
In STEELMAKING PRODUCTION, the molten steel in ladle is after conticaster casting or die casting terminate, and the casting residual molten steel of ladle interior meeting remainder and slag, this is an inevitable phenomenon in molten steel casting process.The existing technique of metallurgy industry is poured over by casting residual molten steel in a slag ladle, after then treating its cooled and solidified, and slag more than the casting of tumbling out wherein.Because the metal iron charge most of casting in the middle of remaining slag has recovery value, so in order to reclaim these metal iron charges, by slag crushing more than the casting of solidifying, must reclaim after metallic iron wherein and slag are peeled off, utilize in steel-making link, residual residue is used as building resource or Metallurgical resources.No matter electric furnace steel making or the technique of pneumatic steelmaking, for steel scrap enter stove size and substance all has requirement, so under this process conditions, the casting residual molten steel of different heat is poured in same slag ladle, the molten steel of different heat under gravity, interpenetrate, solidify out into the entirety of a large slag mixture, slag is wrapped up in steel, iron clad in slag, the technique of slag separating treatment is comparatively complicated, after the slag that in slag, iron charge adheres at stripper surface, also need fragmentation is carried out for casting residue steel or oxyacetylene metal-cutting process can be used at steel making working procedure, so the processing cost recycling the remaining slag intermetallic metal iron charge of casting is higher.
At present, the process of ladle casting residual molten steel is the difficult problem that steel mill faces, and steel mill generally direct residual molten steel of being cast by ladle pours slag ladle into and recycles.Molten steel is frozen into slag and sticks together in slag ladle, slag sticks together and enters natural slag field and carry out weathering, slag after weathering is sticked together after cutting and return converter recycling, this processing mode not only adds processing cost, and high-temperature molten steel easily damages slag ladle, need great place to take simultaneously, and cause environmental pollution.In addition; part steel mill adopts drum process process ladle casting residual molten steel; ladle is cast residual molten steel and pours drum granulation into; the slag of granulation carries out magnetic separation process; slag steel returns converter and utilizes; but this processing method needs to carry out the human and material resources of secondary and the input of financial resources in processing procedure, adds processing cost.During the high added value steel grades such as production Automobile Plate, senior pipe line steel, require high to steel quality, need to control molten steel discharged slag amount in the steel ladle pouring later stage, ladle needs to carry out staying steel to operate, but the processing mode of ladle casting residual molten steel used at present, in ladle, slag accumulation is more, causes ladle can not stay steel in a large number, impacts the quality of product.
Summary of the invention
The processing method of the embodiment of the present invention by providing a kind of ladle to cast residual molten steel, when solving the casting of ladle in prior art residual molten steel processing cost high and production high added value steel grade, ladle can not stay the technical problem of steel, reduce the processing cost of ladle casting residual molten steel, the steel that stays achieving ladle operates.
Embodiments provide the processing method of a kind of ladle casting residual molten steel, described method comprises:
The carbon content controlling the half steel in half ladle is 2.0 ~ 3.5%;
Described half steel contracted affreightment is delivered to molten steel accept across, pour described casting residual molten steel into described half ladle, described casting residual molten steel mixed with described half steel;
Slag treatment is dragged for described ladle, removes the slag produced in described ladle;
When described half ladle reaches converter charge weight, the mixture of the half steel mixed in described half ladle, casting residual molten steel and slag is sent into described converter and smelts.
Further, described Slag treatment is dragged for described ladle, removes the slag produced in described ladle, comprising:
Dragveyer is utilized to drag for Slag treatment to described ladle;
Slag in described ladle is dragged for slag ladle and store.
Further, the described dragveyer that utilizes drags for Slag treatment to described ladle, comprising:
Fall in described half ladle after 2 ~ 4 casting residual molten steels, utilize dragveyer once to drag for slag to described ladle.
Further, divide and pour described casting residual molten steel into described half ladle 6 ~ 8 times.
Further, also comprise: when the blank of slag mixture deficiency casting one piece of target size of the half steel in described half ladle, casting residual molten steel and steel, control described half ladle and stop casting.
Further, after controlling described half ladle stopping casting, the mixture of the described half steel of not casting, casting residual molten steel and slag is all back to described half ladle.
Further, also comprise: the iron water amount of half steel described in production control is 260 ~ 280 tons.
One or more technical schemes that the embodiment of the present invention provides, at least possess following beneficial effect or advantage:
1, the processing method of residual molten steel cast by the ladle that the embodiment of the present invention provides, directly ladle is cast residual molten steel pours half ladle into, again the mixture of the half steel in half ladle, casting residual molten steel and slag is blended into converter to smelt, save and ladle cast residual molten steel and pour slag ladle into and solidify and return the technological process of converter recycling after cutting (or screening), reduce the processing cost of ladle casting residual molten steel, save a large amount of human and material resources and financial resources., casting residual molten steel is blended in half ladle meanwhile, the mixture of the half steel in half ladle, casting residual molten steel and slag is blended into converter and smelts, effectively make use of the heat energy of casting residual molten steel, reduce energy consumption.The processing method of the ladle casting residual molten steel that the embodiment of the present invention provides, the carbon content controlling the half steel in half ladle is 2.0 ~ 3.5%, the carbon in the oxidizing slag that adds in half ladle and half steel can be avoided to carry out intense reaction, cause slag overflow iron bag and burn out equipment.
2, the processing method of residual molten steel cast by the ladle that the embodiment of the present invention provides, and utilizes dragveyer to drag for slag ladle by the slag in ladle, stays steel, improve the quality of finished steel when being convenient to production high added value steel grade in ladle.
3, the processing method of residual molten steel cast by the ladle that the embodiment of the present invention provides, when the blank of the half steel in half ladle, casting residual molten steel and slag mixture deficiency casting one piece of target size, control half ladle and stop casting, can prevent from casting cycle, produce non-compliant short chi base, avoid the technological process increasing processing section chi base, be convenient to the application realizing " complete three take off " technique in smelting process.
Accompanying drawing explanation
The process flow figure of the ladle casting residual molten steel that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
The processing method of the embodiment of the present invention by providing a kind of ladle to cast residual molten steel, when solving the casting of ladle in prior art residual molten steel processing cost high and production high added value steel grade, ladle can not stay the technical problem of steel, reduce the processing cost of ladle casting residual molten steel, the steel that stays achieving ladle operates, and improves steel-making product quality.
In steelmaking process, the control flows such as dephosphorization converter oxygen flux control, the control of rifle position, the selection of oxygen rifle, vessel slag TFe control and the control of half steel tapping temperature are utilized to produce half steel.Molten steel in ladle is after conticaster casting or die casting terminate, and the casting residual molten steel of ladle interior meeting remainder and slag, the process of ladle casting residual molten steel is the difficult problem that steel mill faces.
See Fig. 1, embodiments provide the processing method of a kind of ladle casting residual molten steel, comprising:
Step 10, the carbon content controlling the half steel in half ladle are 2.0 ~ 3.5% (as 2.0%, 3.0% or 3.5%).
In step 10, being 2.0 ~ 3.5% by the carbon content control of the half steel in half ladle, for avoiding the carbon in the oxidizing slag that adds in half ladle and half steel to carry out intense reaction, preventing from causing slag overflow iron bag and burn out equipment.
The iron water amount of step 20, production control half steel is 260 ~ 280 tons (as 260 tons, 270 tons or 280 tons).
In step 20, the iron water amount of production control half steel is 260 ~ 280 tons, decreasing 20 ~ 40 tons than standard iron water amount used at present, for avoiding the oxidizing slag added in half ladle to carry out intense reaction with the carbon in half steel, preventing from causing slag spilling iron bag and burning out equipment.
Step 30, half steel contracted affreightment delivered to molten steel accept across, pour casting residual molten steel into half ladle, casting residual molten steel mixed with half steel.In the embodiment of the present invention, point 6 ~ 8 times (as 6 times, 7 times or 8 times) pour casting residual molten steel into half ladle.
In step 30, point 6 ~ 8 times ladle being cast residual molten steel and pour one and half ladles into, for ensureing that casting residual molten steel fully mixes with half steel, promoting mixed half steel quality, the quality of guarantee finished steel.
Step 40, Slag treatment is dragged for ladle, the slag produced in removing ladle.In the embodiment of the present invention, utilize dragveyer to drag for Slag treatment to ladle, the slag in ladle is dragged for and stores to slag ladle, fall in half ladle after 2 ~ 4 times (as 2 times, 3 times or 4 times) casting residual molten steel, utilize dragveyer once to drag for slag to ladle.
In step 40, fall in half ladle after 2 ~ 4 casting residual molten steels, utilize dragveyer once to drag for slag to ladle, slag can be removed in time, in ladle, stay steel when being convenient to production high added value steel grade, improve the quality of finished steel.
Step 50, when half ladle reaches converter charge weight, by the half steel mixed in half ladle, casting residual molten steel and slag mixture send into converter smelt.
Step 60, when the half steel in half ladle, casting residual molten steel and slag mixture deficiency casting one piece of target size blank time, control half ladle stop casting.After controlling half ladle stopping casting, the mixture of the half steel of not casting, casting residual molten steel and slag is all back to half ladle.
In step 60, when the blank of the half steel in half ladle, casting residual molten steel and slag mixture deficiency casting one piece of target size, control half ladle and stop casting, in casting cycle, non-compliant short chi base is produced for preventing, avoid the technological process increasing processing section chi base, be convenient to the application realizing " complete three take off " technique in smelting process.
The processing method of the ladle casting residual molten steel that the embodiment of the present invention provides, at least possesses following beneficial effect:
The processing method of the ladle casting residual molten steel that the embodiment of the present invention provides, directly ladle is cast residual molten steel pours half ladle into, again the mixture of the half steel in half ladle, casting residual molten steel and slag is blended into converter to smelt, save and ladle cast residual molten steel and pour slag ladle into and solidify and return the technological process of converter recycling after cutting (or screening), reduce the processing cost of ladle casting residual molten steel, save a large amount of human and material resources and financial resources., casting residual molten steel is blended in half ladle meanwhile, the mixture of the half steel in half ladle, casting residual molten steel and slag is blended into converter and smelts, effectively make use of the heat energy of casting residual molten steel, reduce energy consumption.The processing method of the ladle casting residual molten steel that the embodiment of the present invention provides, the carbon content controlling the half steel in half ladle is 2.0 ~ 3.5%, the carbon in the oxidizing slag that adds in half ladle and half steel can be avoided to carry out intense reaction, cause slag overflow iron bag and burn out equipment.
The processing method of the ladle casting residual molten steel that the embodiment of the present invention provides, utilizes dragveyer to drag for slag ladle by the slag in ladle, stays steel, improve the quality of finished steel when being convenient to production high added value steel grade in ladle.
The processing method of the ladle casting residual molten steel that the embodiment of the present invention provides, when the blank of the half steel in half ladle, casting residual molten steel and slag mixture deficiency casting one piece of target size, control half ladle and stop casting, can prevent from casting cycle, produce non-compliant short chi base, avoid the technological process increasing processing section chi base, be convenient to the application realizing " complete three take off " technique in smelting process.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (7)
1. a processing method for ladle casting residual molten steel, it is characterized in that, described method comprises:
The carbon content controlling the half steel in half ladle is 2.0 ~ 3.5%;
Described half steel contracted affreightment is delivered to molten steel accept across, pour described casting residual molten steel into described half ladle, described casting residual molten steel mixed with described half steel;
Slag treatment is dragged for described ladle, removes the slag produced in described ladle;
When described half ladle reaches converter charge weight, the half steel mixed, casting residual molten steel and slag are sent into described converter smelt in described half ladle.
2. the processing method of ladle casting residual molten steel as claimed in claim 1, is characterized in that, describedly drags for Slag treatment to described ladle, removes the slag produced in described ladle, comprising:
Dragveyer is utilized to drag for Slag treatment to described ladle;
Slag in described ladle is dragged for slag ladle and store.
3. the processing method of ladle casting residual molten steel as claimed in claim 2, it is characterized in that, the described dragveyer that utilizes drags for Slag treatment to described ladle, comprising:
Fall in described half ladle after 2 ~ 4 casting residual molten steels, utilize dragveyer once to drag for slag to described ladle.
4. the processing method of the ladle casting residual molten steel as described in any one of claims 1 to 3, is characterized in that, divide and pour described casting residual molten steel into described half ladle 6 ~ 8 times.
5. the processing method of the ladle casting residual molten steel as described in any one of claims 1 to 3, it is characterized in that, also comprise: when the blank of the half steel in described half ladle, casting residual molten steel and slag mixture deficiency casting one piece of target size, control described half ladle and stop casting.
6. the processing method of ladle casting residual molten steel as claimed in claim 5, is characterized in that, after controlling described half ladle stopping casting, the mixture of the described half steel of not casting, casting residual molten steel and slag is all back to described half ladle.
7. the processing method of casting residual molten steel as claimed in claim 1 or 2, is characterized in that, also comprise: the iron water amount of half steel described in production control is 260 ~ 280 tons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510700821.0A CN105290345A (en) | 2015-10-23 | 2015-10-23 | Treatment method of ladle casting residual molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510700821.0A CN105290345A (en) | 2015-10-23 | 2015-10-23 | Treatment method of ladle casting residual molten steel |
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| Publication Number | Publication Date |
|---|---|
| CN105290345A true CN105290345A (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510700821.0A Pending CN105290345A (en) | 2015-10-23 | 2015-10-23 | Treatment method of ladle casting residual molten steel |
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| CN (1) | CN105290345A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108480610A (en) * | 2018-05-29 | 2018-09-04 | 马鞍山尚元冶金科技有限公司 | It is useless to pour remaining straight forming device |
| 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 |
| CN115491444A (en) * | 2022-08-30 | 2022-12-20 | 马鞍山钢铁股份有限公司 | Method for preventing ladle from sticking and splashing by returning ladle casting residue to converter in hot state |
-
2015
- 2015-10-23 CN CN201510700821.0A patent/CN105290345A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 汪泽花: "奇思妙想创效益——攀钢钒炼钢厂铸余渣热回收利用攻关记", 《中国攀枝花网》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108480610A (en) * | 2018-05-29 | 2018-09-04 | 马鞍山尚元冶金科技有限公司 | It is useless to pour remaining straight forming device |
| CN108480610B (en) * | 2018-05-29 | 2024-01-26 | 马鞍山尚元冶金科技有限公司 | Direct forming device for waste casting |
| 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 |
| CN115491444A (en) * | 2022-08-30 | 2022-12-20 | 马鞍山钢铁股份有限公司 | Method for preventing ladle from sticking and splashing by returning ladle casting residue to converter in hot state |
| CN115491444B (en) * | 2022-08-30 | 2024-01-30 | 马鞍山钢铁股份有限公司 | Method for preventing ladle from adhering and splashing by hot return of ladle casting residue to converter |
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