CN105290345A - Treatment method for steel ladle casting remaining liquid steel - Google Patents
Treatment method for steel ladle casting remaining liquid steel Download PDFInfo
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- 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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- ladle
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Abstract
The invention relates to the technical field of steel smelting, in particular to a treatment method for steel ladle casting remaining liquid steel. The method includes the steps that the carbon content of semisteel in a semisteel ladle is controlled to be 2.0%-3.5%; the semisteel ladle is conveyed to a receiving bay, the casting remaining liquid steel is successively poured into the semisteel ladle, and the casting remaining liquid steel is mixed with the semisteel; the steel ladle is subjected to treatment of dragging for slags so as to remove steel slags generated in the steel ladle; and when the semisteel ladle reaches the charging amount of a converter, the semisteel, the casting remaining liquid steel and the steel slags mixed in the semisteel ladle are delivered into the converter to be smelted. By means of the treatment method for the steel ladle casting remaining liquid steel, the steel ladle casting remaining liquid steel is directly poured into the semisteel ladle, a mixture of the semisteel, the casting remaining liquid steel and the steel slags in the semisteel ladle is put in the converter to be smelted, the process that the steel ladle casting remaining liquid steel is poured into a slags tank to be solidified and cut (or screened) and then returns to the converter to be reused is omitted, and the treatment cost of the steel ladle casting remaining liquid steel is reduced. The carbon content of the semisteel in the semisteel ladle is controlled to be 2.0%-3.5%, and strong 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 for steel ladle casting remaining liquid steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510700821.0A CN105290345A (en) | 2015-10-23 | 2015-10-23 | Treatment method for steel ladle casting remaining liquid steel |
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| CN105290345A true CN105290345A (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510700821.0A Pending CN105290345A (en) | 2015-10-23 | 2015-10-23 | Treatment method for steel ladle casting remaining liquid steel |
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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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