CN115198056A - Blowing device and KR efficient slag skimming method - Google Patents
Blowing device and KR efficient slag skimming method Download PDFInfo
- Publication number
- CN115198056A CN115198056A CN202210703153.7A CN202210703153A CN115198056A CN 115198056 A CN115198056 A CN 115198056A CN 202210703153 A CN202210703153 A CN 202210703153A CN 115198056 A CN115198056 A CN 115198056A
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- Prior art keywords
- ladle
- annular frame
- slag
- blowing device
- efficiency
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- 238000007664 blowing Methods 0.000 title claims abstract description 60
- 239000002893 slag Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000000112 cooling gas Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000003595 mist Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 28
- 229910052742 iron Inorganic materials 0.000 description 14
- 238000001816 cooling Methods 0.000 description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000007712 rapid solidification Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
One aspect of the present invention provides an air blowing device, including: the annular frame group is arranged on the surface of the ladle; and the nozzles are arranged on the annular frame group. The invention provides a KR high-efficiency slag skimming method on the other hand, which comprises the following steps: after the KR stirring is finished, placing the blowing device on the surface of the ladle, and starting blowing operation; and after the blowing is finished, rotating the ladle to a proper position, and carrying out slag skimming operation. The embodiment of the application provides a gas blowing device and a KR high-efficiency slag-raking method, solves the technical problems of high slag-raking difficulty and low efficiency in the prior art, and realizes the technical effect of high-efficiency slag-raking.
Description
Technical Field
The invention relates to the technical field of molten iron desulphurization in the metallurgical industry, in particular to a blowing device and a KR efficient slagging-off method.
Background
The pretreatment of molten iron is an important means for producing high-grade steel, and among them, the pretreatment of molten iron desulphurization by a mechanical stirring method (KR method) is widely applied due to the advantages of good dynamic conditions, high production efficiency and low running cost, becomes the best mode of molten iron pretreatment desulphurization at present, and gradually becomes an indispensable important means for modern steel plants.
In the KR treatment process, in order to realize the effect of efficient desulphurization, a process mode of front slag skimming → stirring desulphurization → rear slag skimming is generally adopted. Because the slag before the molten iron is generally blast furnace slag, the slag is generally in a massive shape and is easy to remove due to long-time cooling and the characteristics of the slag. In KR stirring desulfurization process, generally can add the desulfurizer again, generally in order to increase the area of contact of desulfurizer and molten iron, can adopt minimum granule desulfurizer, then these desulfurizer fully dissolve with the molten iron under the effect of stirring head, realize desulfurated effect. After the stirring is finished, the small-particle desulfurization products have to be removed to reduce the amount of the returned sulfur in the converter due to the high sulfur content, i.e., the so-called post-slagging operation. However, because the granularity of the slag is small, the difficulty of slag skimming is high, so that the operation of prolonging the slag skimming time and the like has to be adopted to achieve the effect of certain bright surface, but the operation is very easy to cause that a large amount of molten iron is skived off together in the slag skimming process, thereby causing resource waste.
Disclosure of Invention
The embodiment of the application provides a gas blowing device and a KR high-efficiency slag-raking method, solves the technical problems of high slag-raking difficulty and low efficiency in the prior art, and realizes the technical effect of high-efficiency slag-raking.
An aspect of the embodiment of the present application provides an air blowing device, including:
the annular frame group is arranged on the surface of the ladle;
and the nozzles are arranged on the annular frame group.
Furthermore, the annular frame group comprises 5-20 annular frames, and the diameters of the annular frames are sequentially decreased from outside to inside.
Further, the annular frame is of a steel structure.
Furthermore, the diameter of the annular frame of the outermost ring is 100-200 mm smaller than the inner diameter of the ladle, and the diameter of the annular frame of the innermost ring is more than or equal to 100mm.
Further, the number of the nozzles arranged on each annular frame is 3-20.
On the other hand, the embodiment of the application provides a KR high-efficiency slag skimming method, which comprises the following steps:
after KR stirring is finished, placing the air blowing device on the surface of the ladle, and starting air blowing operation;
and after blowing is finished, rotating the ladle until the slag reaches the liquid level of the ladle, and carrying out slag skimming operation.
Further, the air blowing device is 20-100mm away from the surface of the ladle.
Furthermore, the air blowing time is 3-5min, and the air blowing flow is 20-1000NL/min.
Further, the blowing gas is a cooling gas, and the temperature of the cooling gas is 30 ℃ or lower.
Further, it is characterized byThe cooling gas comprises water mist and N 2 Ar or CO 2 。
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
this application is through having increased gas blowing device on the ladle surface, through gas blowing device to the ladle jetting cooling gas, utilizes the molten iron of cooling gas rapid cooling high temperature, realizes the slag on molten iron surface and the molten iron rapid solidification who is close the slag, forms firm shell to the effect of sediment is taken off to the realization high efficiency.
Drawings
Fig. 1 is a schematic structural diagram of an air blowing device according to an embodiment of the present application.
Detailed Description
The invention provides a blowing device and a KR efficient slag-raking method, which realize the KR efficient slag-raking effect.
In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.
Example one
As shown in fig. 1, an embodiment of the present application provides an air blowing device, including: the device comprises an annular frame group and a plurality of nozzles 1, wherein the annular frame group is arranged on the surface of a ladle; a plurality of nozzles 1 are arranged on the annular frame group. Wherein, the annular frame group comprises 5-20 annular frames 2, and the diameters of the annular frames 2 are decreased from outside to inside in turn. In order to ensure the life of the structure, the ring frame 2 is made of steel. The diameter of the annular frame 2 of the outermost ring is 100-200 mm smaller than the inner diameter of the steel ladle, and the diameter of the annular frame 2 of the innermost ring is more than or equal to 100mm. The number of nozzles 1 arranged on each ring frame 2 is 3-20.
Example two
The embodiment of the application provides a KR high-efficiency slag skimming method, which comprises the following steps:
step S1: after the KR stirring is finished, placing the air blowing device in the first embodiment on the surface of the ladle, and starting air blowing operation;
step S2: and after blowing, rotating the ladle until the slag reaches the liquid level of the ladle, and carrying out slag skimming operation.
Wherein, in order to ensure the cooling effect to the maximum, the air blowing device is 20-100mm away from the surface of the foundry ladle. The air blowing time is 3-5min, and the air flow is 20-1000NL/min. The blowing gas is cooling gas, and the temperature of the cooling gas is below 30 ℃. The cooling gas comprises water mist, N 2 Ar or CO 2 。
EXAMPLE III
The difference between the embodiment of the application and the second embodiment is that when the blowing device is used for blowing the ladle, the KR high-efficiency slag-raking method provided by the embodiment of the application blows water mist cooling gas into the ladle, and the temperature of the cooling gas is controlled to be below 20 ℃. The annular frame group consists of 5 annular frames; the diameter of the annular frame of the outermost ring is 3500mm, the inner diameter of the steel ladle is 1600mm, the diameter of the annular frame of the innermost ring is more than or equal to 300mm, and the number of the outermost ring to the innermost ring is 20/15/12/10/6 respectively. In order to ensure the cooling effect, the air blowing device is required to be 100mm away from the surface of the ladle, the air blowing time is 5min, and the air blowing flow is 20NL/min;
according to the KR high-efficiency slag-off method provided by the embodiment, one-time slag-off is adopted, and the sulfur return amount of the converter is 18ppm.
The rest of the process is identical to the second embodiment.
Example four
The difference between the embodiment of the application and the second embodiment is that the KR efficient slag-raking method provided by the embodiment of the application blows N into the ladle when the blowing device is used for blowing the ladle 2 And the temperature of the cooling gas is controlled to be below 30 ℃. The annular frame group consists of 10 annular frames; in order to ensure the coverage area of the blowing cooling, the diameter of the ring frame of the outermost ring is 4100mm, wherein the inner diameter of the ladle is 4200mm, the diameter of the ring frame of the innermost ring is 100mm, and the blowing amount from the outermost ring to the innermost ring is shown in table one. In order to ensure the cooling effect, the air blowing device is required to be 20mm away from the surface of the ladle, the air blowing time is 3min, and the air blowing flow is 300NL/min.
Watch 1
| Number of rings | Diameter (mm) | Number of |
| 1 | 4100 | 20 |
| 2 | 3680 | 18 |
| 3 | 3260 | 16 |
| 4 | 2840 | 14 |
| 5 | 2420 | 12 |
| 6 | 2000 | 10 |
| 7 | 1580 | 8 |
| 8 | 1160 | 6 |
| 9 | 740 | 4 |
| 10 | 320 | 3 |
By the KR efficient slag skimming method provided by the embodiment, once slag skimming is adopted, and the sulfur return amount of the converter is 20ppm.
The rest of the process is identical to the second embodiment.
EXAMPLE five
The difference between the embodiment of the application and the second embodiment is that the KR efficient slag-raking method provided by the embodiment of the application blows CO into the ladle when the blowing device is used for blowing the ladle 2 Cooling the gas, and controlling the temperature of the cooling gas to be below 20 ℃. The annular frame group consists of 20 annular frames; in order to ensure the coverage area of blowing cooling, the diameter of the annular frame of the outermost ring is 3500mm, the inner diameter of the ladle is 3700mm, the diameter of the annular frame of the innermost ring is 300mm, and the number of the blows from the outermost ring to the innermost ring is shown in the table two. In order to ensure the cooling effect, the air blowing device is 80mm away from the surface of the ladle, the air blowing time is 4min, and the air blowing flow is 1000NL/min.
Watch two
| Number of rings | Diameter (mm) | Number of |
| 1 | 4100 | 20 |
| 2 | 3900 | 19 |
| 3 | 3700 | 18 |
| 4 | 3500 | 17 |
| 5 | 3300 | 16 |
| 6 | 3100 | 15 |
| 7 | 2900 | 14 |
| 8 | 2700 | 13 |
| 9 | 2500 | 12 |
| 10 | 2300 | 11 |
| 11 | 2100 | 10 |
| 12 | 1900 | 9 |
| 13 | 1700 | 8 |
| 14 | 1500 | 7 |
| 15 | 1300 | 6 |
| 16 | 1100 | 5 |
| 17 | 900 | 4 |
| 18 | 700 | 3 |
| 19 | 500 | 3 |
| 20 | 300 | 3 |
By the KR high-efficiency slagging-off method provided by the embodiment, primary slagging-off is adopted, and the sulfur return amount of the converter is 22ppm.
The rest of the process is identical to the second embodiment.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. this application is through having increased gas blowing device on the ladle surface, through gas blowing device to the ladle jetting cooling gas, utilizes the molten iron of cooling gas rapid cooling high temperature, realizes the slag on molten iron surface and the molten iron rapid solidification who is close the slag, forms firm shell to the effect of sediment is taken off to the realization high efficiency.
2. By adopting the structural design of the annular frame group, the blowing device is ensured to be uniformly distributed on the surface of the ladle, so that the solidification of the slag is realized to the maximum extent;
3. by adopting the structural design of the nozzles, the efficient air blowing and cooling effect on the ladle is ensured, the indexes of the number of the nozzles are determined, and the air blowing devices can be uniformly distributed on the surface of the ladle so as to realize solidification of slag to the maximum extent;
4. the diameter of the annular frame of the outermost ring is 100-200 mm smaller than the inner diameter of the steel ladle, and the diameter of the annular frame of the innermost ring is more than or equal to 100mm, so that the size of each ring is further determined, and the purpose is to ensure that each ring is uniformly distributed so as to maximally realize solidification of slag.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. An air blowing device, comprising:
the annular frame group is arranged on the surface of the ladle;
and the plurality of nozzles are arranged on the annular frame group.
2. The insufflation apparatus of claim 1 wherein:
the annular frame group comprises 5-20 annular frames, and the diameters of the annular frames are sequentially decreased from outside to inside.
3. The blowing device according to claim 2, characterized in that:
the annular frame is of a steel structure.
4. The insufflation apparatus of claim 2 wherein:
the diameter of the annular frame of the outermost ring is 100-200 mm smaller than the inner diameter of the steel ladle, and the diameter of the annular frame of the innermost ring is more than or equal to 100mm.
5. The insufflation apparatus of claim 2 wherein:
the number of the nozzles arranged on each annular frame is 3-20.
6. A KR high-efficiency slagging-off method is characterized by comprising the following steps:
after KR stirring is finished, placing the blowing device of any one of claims 1 to 5 on the surface of the ladle, and starting blowing operation;
and after blowing is finished, rotating the ladle until the slag reaches the liquid level of the ladle, and carrying out slag skimming operation.
7. The KR high-efficiency slagging-off method according to claim 6, wherein:
the distance between the air blowing device and the surface of the ladle is 20-100mm.
8. The KR high-efficiency slagging-off method according to claim 6, wherein:
the air blowing time is 3-5min, and the air blowing flow is 20-1000NL/min.
9. The KR high-efficiency slagging-off method according to claim 6, wherein:
the blowing gas is cooling gas, and the temperature of the cooling gas is below 30 ℃.
10. The KR high-efficiency slagging-off method according to claim 9, wherein:
the cooling gas comprises water mist and N 2 Ar or CO 2 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210703153.7A CN115198056A (en) | 2022-06-21 | 2022-06-21 | Blowing device and KR efficient slag skimming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210703153.7A CN115198056A (en) | 2022-06-21 | 2022-06-21 | Blowing device and KR efficient slag skimming method |
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| Publication Number | Publication Date |
|---|---|
| CN115198056A true CN115198056A (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210703153.7A Pending CN115198056A (en) | 2022-06-21 | 2022-06-21 | Blowing device and KR efficient slag skimming method |
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| CN (1) | CN115198056A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277366A (en) * | 1999-02-18 | 2000-12-20 | 庄臣及庄臣视力保护公司 | Contact lenses transfer and material moving and removing system |
| KR20010009701A (en) * | 1999-07-13 | 2001-02-05 | 이구택 | Process of refining a molten steel having superior desulfurization ratio |
| CN203140681U (en) * | 2013-03-15 | 2013-08-21 | 金川集团股份有限公司 | De-molding agent agitating device |
| CN104759613A (en) * | 2015-04-15 | 2015-07-08 | 中冶南方工程技术有限公司 | Molten iron tank slag removal system and method |
| CN204661751U (en) * | 2015-05-28 | 2015-09-23 | 中冶赛迪工程技术股份有限公司 | Blowing slag-removing mechanism |
| CN107651200A (en) * | 2017-10-30 | 2018-02-02 | 航宇救生装备有限公司 | A kind of multiinjector injector for the inflation of civil aircraft slide |
| CN208346322U (en) * | 2018-05-09 | 2019-01-08 | 浙江梵彼斯特轻纺发展有限公司 | A kind of air-cooled profile spinneret component of annular blowing |
| CN209149059U (en) * | 2018-12-28 | 2019-07-23 | 河北香山园林古建筑工程有限公司 | A kind of novel drenching installation |
| CN110484684A (en) * | 2019-09-12 | 2019-11-22 | 北京首钢股份有限公司 | A kind of molten steel pocket deslagging method |
| CN215918327U (en) * | 2021-09-08 | 2022-03-01 | 华蓥市正大汽配有限公司 | Cleaning machine for automobile lampshade |
-
2022
- 2022-06-21 CN CN202210703153.7A patent/CN115198056A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277366A (en) * | 1999-02-18 | 2000-12-20 | 庄臣及庄臣视力保护公司 | Contact lenses transfer and material moving and removing system |
| KR20010009701A (en) * | 1999-07-13 | 2001-02-05 | 이구택 | Process of refining a molten steel having superior desulfurization ratio |
| CN203140681U (en) * | 2013-03-15 | 2013-08-21 | 金川集团股份有限公司 | De-molding agent agitating device |
| CN104759613A (en) * | 2015-04-15 | 2015-07-08 | 中冶南方工程技术有限公司 | Molten iron tank slag removal system and method |
| CN204661751U (en) * | 2015-05-28 | 2015-09-23 | 中冶赛迪工程技术股份有限公司 | Blowing slag-removing mechanism |
| CN107651200A (en) * | 2017-10-30 | 2018-02-02 | 航宇救生装备有限公司 | A kind of multiinjector injector for the inflation of civil aircraft slide |
| CN208346322U (en) * | 2018-05-09 | 2019-01-08 | 浙江梵彼斯特轻纺发展有限公司 | A kind of air-cooled profile spinneret component of annular blowing |
| CN209149059U (en) * | 2018-12-28 | 2019-07-23 | 河北香山园林古建筑工程有限公司 | A kind of novel drenching installation |
| CN110484684A (en) * | 2019-09-12 | 2019-11-22 | 北京首钢股份有限公司 | A kind of molten steel pocket deslagging method |
| CN215918327U (en) * | 2021-09-08 | 2022-03-01 | 华蓥市正大汽配有限公司 | Cleaning machine for automobile lampshade |
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