CN114277214A - Semisteel smelting furnace and steelmaking method - Google Patents
Semisteel smelting furnace and steelmaking method Download PDFInfo
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- CN114277214A CN114277214A CN202111667698.9A CN202111667698A CN114277214A CN 114277214 A CN114277214 A CN 114277214A CN 202111667698 A CN202111667698 A CN 202111667698A CN 114277214 A CN114277214 A CN 114277214A
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- steel
- smelting furnace
- feeding
- hole
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- 238000003723 Smelting Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims description 15
- 238000009628 steelmaking Methods 0.000 title claims description 9
- 239000000843 powder Substances 0.000 claims abstract description 36
- 239000006185 dispersion Substances 0.000 claims abstract description 24
- 239000002893 slag Substances 0.000 claims abstract description 22
- 239000002131 composite material Substances 0.000 claims abstract description 14
- 238000010079 rubber tapping Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 39
- 239000010959 steel Substances 0.000 claims description 39
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 229910000514 dolomite Inorganic materials 0.000 claims description 4
- 239000010459 dolomite Substances 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MRHSJWPXCLEHNI-UHFFFAOYSA-N [Ti].[V].[Fe] Chemical compound [Ti].[V].[Fe] MRHSJWPXCLEHNI-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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- Vertical, Hearth, Or Arc Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a semisteel smelting furnace, which comprises a furnace body and a furnace cover; a tapping hole is formed in the bottom of the furnace body; the furnace cover is provided with a plurality of feeding holes, the feeding holes are arranged along the circumferential direction of the furnace cover, and the plurality of feeding holes are connected with an air inlet hole arranged in the middle of the furnace cover; the bottom of the feeding hole is provided with a powder dispersing rotating sheet which is connected with the feeding hole; the bottom of the powder dispersion rotating sheet is provided with a bottom sheet which is arranged to be conical and is connected with the feeding hole. The semisteel smelting furnace can separately and finely add the added composite slag, and further reduces the slagging amount of the composite slag.
Description
Technical Field
The invention relates to the field of steelmaking, in particular to a semisteel smelting furnace and a steelmaking method.
Background
The vanadium-titanium semisteel smelting is a new vanadium-titanium iron ore smelting process. In the existing vanadium-titanium semisteel smelting process, a slagging agent and an auxiliary heat-raising material must be added for slagging. The converter is turned over for the first time to sample and measure the temperature after the converter semi-steel smelting blowing is finished; and determining the reciprocal of converting according to the sampling analysis result and temperature measurement of the first converter reversing. At present, the converter semi-steel smelting implements one-time or multiple-time converter-reversing tapping process.
In the prior art, acid oxides required by semisteel smelting slagging enter vanadium slag; meanwhile, C, Si oxidation heat loss in the vanadium extraction process; causes insufficient heat and difficult slagging in semisteel smelting, so the semisteel smelting difficulty is high. In the smelting process, the slagging process is rapid, the temperature is high, large-scale slagging is easily caused, the slagging amount is large, and the slag charge consumption is high.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method which can reduce the slag forming amount and optimize the slag consumption.
The invention firstly provides a semisteel smelting furnace, which comprises a furnace body and a furnace cover; a tapping hole is formed in the bottom of the furnace body; the furnace cover is provided with a plurality of feeding holes, the feeding holes are arranged along the circumferential direction of the furnace cover, and the plurality of feeding holes are connected with an air inlet hole arranged in the middle of the furnace cover; the bottom of the feeding hole is provided with a powder dispersing rotating sheet which is connected with the feeding hole; the bottom of the powder dispersion rotating sheet is provided with a bottom sheet which is arranged to be conical and is connected with the feeding hole.
The furnace body is set into a cylindrical furnace body, the steel-tapping water gap is set into an inverted cone-shaped steel-tapping water gap, and the outlet is preferably arranged at the center of the bottom. The furnace cover is arranged at the top of the furnace body, and a reinforcing buckling device can be additionally arranged between the furnace cover and the furnace body, which is a conventional arrangement on the market and is not described herein again. The charge door sets up on same circumferencial direction on the bell to the preferred contained angle between each other is unanimous, for example sets up two, sets up 180 degrees, sets up three, sets up 120 degrees. The preferable top of the air inlet hole is arranged at the central position of the furnace cover and is connected with a plurality of feed holes.
The invention also provides the following optimization scheme:
preferably, the powder dispersion rotating piece is connected with the feeding hole through a powder dispersion rotating piece rotating shaft connected to the central point of the powder dispersion rotating piece. The powder dispersion rotating sheet rotating shaft is rotatably connected with the feeding hole.
More preferably, the powder dispersing rotating plate rotating shaft is rotatably connected with a cross connecting strip. The cross connecting strip is preferably arranged on the inner side surface of the feeding hole.
More preferably, the cross connecting strip is connected to the bottom of the feeding hole. The cross connecting strip is preferably fixedly connected with the feeding hole.
Preferably, the bottom sheet is connected to the bottom of the feed hole through a circumferential bottom sheet connecting column. The bottom piece is arranged conically and preferably in accordance with the cross-sectional size of the feed opening.
Preferably, the outer annular surface of the furnace body is provided with a reinforcing strip. The reinforcing strips are preferably arranged to extend from the top to the bottom of the furnace body.
Preferably, the charging holes are circumferentially arranged on the furnace cover and keep consistent included angles with each other. The feeding holes are preferably arranged in a nematic array along the same circumference of the furnace cover, and the feeding holes have the same included angle with each other.
Preferably, the air inlet hole and the feeding hole are intersected at an oblique angle.
The invention also provides a steelmaking method of the semisteel smelting furnace, which comprises the following steps: oxygen is supplied by an oxygen lance, and semi-steel and scrap steel are poured into a semi-steel smelting furnace; blowing the composite slag from a feeding hole, and continuously adding gas from an air inlet hole to obtain molten steel; the composite slag material comprises lime, light-burned dolomite and a slagging agent, which are respectively added from three feeding holes.
Preferably, the weight ratio of the semi-steel to the scrap steel is (78-85): (3-10).
The invention has the beneficial effects that:
1. the semisteel smelting furnace can separately and finely add the added composite slag, so that the slag forming amount of the composite slag is further reduced;
2. the semisteel smelting furnace can be used for respectively adding the composite slag, and blowing and sampling are carried out during adding, so that the composite slag is mixed more uniformly.
Drawings
FIG. 1 is a perspective view of a semi-steel smelting furnace of the present invention;
FIG. 2 is a top view of the semi-steel smelting furnace of the present invention;
FIG. 3 is a cross-sectional view of the AA side of FIG. 2;
FIG. 4 is a perspective view of a semi-steel smelting furnace of the present invention;
the specific reference numerals are:
1, a furnace body; 2, furnace cover; 11 tapping hole; 12 reinforcing strips; 21 a feed hole; 22 air inlet holes; 23, dispersing and rotating powder; 24 a bottom sheet; 25 cross connecting bars; 26 a bottom sheet connecting post; 231 powder dispersion rotor axis.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following embodiments.
As shown in FIGS. 1 to 4, the present invention firstly provides a semisteel smelting furnace, comprising a furnace body 1 and a furnace cover 2; a tapping hole 11 is arranged at the bottom of the furnace body 1; the furnace cover 2 is provided with a plurality of feeding holes 21, the feeding holes 21 are arranged along the circumferential direction of the furnace cover 2, and the plurality of feeding holes 21 are connected with an air inlet 22 arranged in the middle of the furnace cover 2; a powder dispersing rotating sheet 23 is arranged at the bottom of the feeding hole 21, and the powder dispersing rotating sheet 23 is connected with the feeding hole 21; the bottom of the powder dispersion rotor 23 is provided with a bottom plate 24, and the bottom plate 24 is arranged in a conical shape and is connected with the feeding hole 21.
The furnace body 1 is configured as a cylindrical furnace body, the molten steel discharge opening 11 is configured as an inverted cone-shaped molten steel discharge opening, and the outlet is preferably disposed at the center of the bottom. The furnace cover 2 is arranged at the top of the furnace body 1, and a reinforcing buckling device can be added between the furnace cover 2 and the furnace body 1, which is a conventional arrangement on the market and is not described herein again. The charging holes 21 are arranged in the same circumferential direction on the furnace cover 2, and preferably have the same angle with each other, for example, two charging holes are arranged at 180 degrees, and three charging holes are arranged at 120 degrees. The air inlet 22 is preferably provided at the top in the center of the furnace cover 2 and is connected to each of the plurality of feed holes 21. The air inlet hole 22 is communicated with the feeding hole 21, and is arranged to feed air to the plurality of feeding holes 21 through one air inlet hole 22, and is preferably arranged such that the distance and the air inlet angle between the air inlet hole 22 and the plurality of feeding holes 21 are the same. The powder dispersion rotor 23 is preferably provided as an arc-shaped rotor, and the powder dispersion rotor 23 is preferably formed to be in conformity with the inner diameter of the feed hole 21.
In order to maintain the uniform rotation of the powder dispersion rotor 23, the powder dispersion rotor 23 is connected to the feed opening 21 through a powder dispersion rotor rotation shaft 231 connected to the center point thereof. The powder dispersion rotating plate rotating shaft 231 is rotatably connected with the feeding hole 21. The powder dispersing rotor rotational shaft 231 is provided at the center of the powder dispersing rotor 23.
The powder dispersion rotary plate rotary shaft 231 is rotatably connected with a cross connecting strip 25. The cross-shaped connecting bar 25 is preferably provided on the inner side surface of the feed opening 21.
The cross connecting strip 25 is connected to the bottom of the feeding hole 21. The cross connecting bar 25 is preferably fixedly connected with the feeding hole 21.
The bottom sheet 24 is connected to the bottom of the feed hole 21 through a circumferential bottom sheet connecting column 26. The bottom piece 24 is arranged conically and preferably in correspondence with the cross-sectional size of the feed opening 21.
The outer ring surface of the furnace body 1 is provided with a reinforcing strip 12. The reinforcing bars 12 are preferably arranged to extend from the top to the bottom of the furnace body 1.
The charging holes 21 are circumferentially arranged on the furnace cover 2 and keep consistent included angles with each other. The feed openings 21 are preferably arranged in a row array along the same circumference of the furnace lid 2, with the same angle between each other.
The air inlet hole 22 and the feeding hole 21 are intersected at an oblique angle.
The invention also provides a steelmaking method of the semisteel smelting furnace, which comprises the following steps: oxygen is supplied by an oxygen lance, and semi-steel and scrap steel are poured into a semi-steel smelting furnace; blowing the composite slag from a feeding hole 21, and continuously adding gas from an air inlet 22 to obtain molten steel; the composite slag material comprises lime, light-burned dolomite and a slagging agent, which are respectively added from three feeding holes 21.
Preferably, the weight ratio of the semi-steel to the scrap steel is (78-85): (3-10).
Examples
As shown in FIGS. 1 to 4, the semisteel smelting furnace of the present embodiment includes a furnace body 1 and a furnace cover 2; a tapping hole 11 is arranged at the bottom of the furnace body 1; the furnace cover 2 is provided with a plurality of feeding holes 21, the feeding holes 21 are arranged along the circumferential direction of the furnace cover 2, and the plurality of feeding holes 21 are connected with an air inlet 22 arranged in the middle of the furnace cover 2; a powder dispersing rotating sheet 23 is arranged at the bottom of the feeding hole 21, and the powder dispersing rotating sheet 23 is connected with the feeding hole 21; the bottom of the powder dispersion rotor 23 is provided with a bottom plate 24, and the bottom plate 24 is arranged in a conical shape and is connected with the feeding hole 21. The furnace body 1 is configured as a cylindrical furnace body, the molten steel outlet 11 is configured as an inverted cone molten steel outlet, and the outlet is arranged at the center of the bottom. The powder dispersion rotary plate 23 is connected to the feed opening 21 through a powder dispersion rotary plate rotating shaft 231 connected to the center point thereof. The powder dispersion rotary plate rotary shaft 231 is rotatably connected with a cross connecting strip 25. The cross connecting strip 25 is connected to the bottom of the feeding hole 21. The bottom sheet 24 is connected to the bottom of the feed hole 21 through a circumferential bottom sheet connecting column 26. The outer ring surface of the furnace body 1 is provided with a reinforcing strip 12. The charging holes 21 are circumferentially arranged on the furnace cover 2 and keep consistent included angles with each other. The air inlet hole 22 and the feeding hole 21 are intersected at an oblique angle.
The steelmaking method of the semisteel smelting furnace comprises the following steps: oxygen is supplied by an oxygen lance, and semi-steel and scrap steel are poured into a semi-steel smelting furnace; blowing the composite slag from a feeding hole 21, and continuously adding gas from an air inlet 22 to obtain molten steel; the composite slag material comprises lime, light-burned dolomite and a slagging agent, which are respectively added from three feeding holes 21. After the slag charge is added, gas is continuously added into the gas inlet 22, the powder dispersing rotating sheet 23 rotates to add the slag charge, and the slag charge is uniformly dispersed and added into the semisteel smelting furnace to complete smelting.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. The utility model provides a semisteel smelting furnace which characterized in that: comprises a furnace body and a furnace cover; a tapping hole is formed in the bottom of the furnace body; the furnace cover is provided with a plurality of feeding holes, the feeding holes are arranged along the circumferential direction of the furnace cover, and the plurality of feeding holes are connected with an air inlet hole arranged in the middle of the furnace cover; the bottom of the feeding hole is provided with a powder dispersing rotating sheet which is connected with the feeding hole; the bottom of the powder dispersion rotating sheet is provided with a bottom sheet which is arranged to be conical and is connected with the feeding hole.
2. The semi-steel smelting furnace according to claim 1, characterized in that: the powder dispersion rotating sheet is connected with the feeding hole through a powder dispersion rotating sheet rotating shaft connected to the central point of the powder dispersion rotating sheet.
3. The semi-steel smelting furnace according to claim 2, characterized in that: the powder dispersion rotating plate rotating shaft is rotatably connected with a cross connecting strip.
4. The semi-steel smelting furnace according to claim 3, characterized in that: the cross connecting strip is connected to the bottom of the feeding hole.
5. The semi-steel smelting furnace according to claim 1, characterized in that: the bottom piece is connected to the bottom of the feeding hole through a circumferential bottom piece connecting column.
6. The semi-steel smelting furnace according to claim 1, characterized in that: and a reinforcing strip is arranged on the outer ring surface of the furnace body.
7. The semi-steel smelting furnace according to claim 1, characterized in that: the charging holes are circumferentially arranged on the furnace cover and the included angles among the charging holes are kept consistent.
8. The semi-steel smelting furnace according to claim 1, characterized in that: the air inlet hole and the feeding hole are intersected at an oblique angle.
9. A steel-making method of a semi-steel smelting furnace according to claim 1, characterized by: the method comprises the following steps: oxygen is supplied by an oxygen lance, and semi-steel and scrap steel are poured into a semi-steel smelting furnace; blowing the composite slag from a feeding hole, and continuously adding gas from an air inlet hole to obtain molten steel; the composite slag material comprises lime, light-burned dolomite and a slagging agent, which are respectively added from three feeding holes.
10. The steel-making method of a semi-steel smelting furnace according to claim 9, characterized by: the weight ratio of the semisteel to the scrap steel is as follows: (78-85): (3-10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111667698.9A CN114277214A (en) | 2021-12-31 | 2021-12-31 | Semisteel smelting furnace and steelmaking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111667698.9A CN114277214A (en) | 2021-12-31 | 2021-12-31 | Semisteel smelting furnace and steelmaking method |
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| Publication Number | Publication Date |
|---|---|
| CN114277214A true CN114277214A (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111667698.9A Pending CN114277214A (en) | 2021-12-31 | 2021-12-31 | Semisteel smelting furnace and steelmaking method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1353771A (en) * | 1999-05-31 | 2002-06-12 | 奥托库姆普联合股份公司 | Equipment for even feed of pulverous materials to concentrate burner of suspension smelting furnace |
| CN1975305A (en) * | 2006-12-14 | 2007-06-06 | 攀枝花市永兴钛业有限责任公司 | Closed electric furnace and titanium slag smelting process |
| CN104212943A (en) * | 2014-09-28 | 2014-12-17 | 四川德胜集团钒钛有限公司 | Semisteel smelting technology |
| CN210434379U (en) * | 2019-07-09 | 2020-05-01 | 上海盖艺模塑科技有限公司 | Reinforced homodisperse device |
-
2021
- 2021-12-31 CN CN202111667698.9A patent/CN114277214A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1353771A (en) * | 1999-05-31 | 2002-06-12 | 奥托库姆普联合股份公司 | Equipment for even feed of pulverous materials to concentrate burner of suspension smelting furnace |
| CN1975305A (en) * | 2006-12-14 | 2007-06-06 | 攀枝花市永兴钛业有限责任公司 | Closed electric furnace and titanium slag smelting process |
| CN104212943A (en) * | 2014-09-28 | 2014-12-17 | 四川德胜集团钒钛有限公司 | Semisteel smelting technology |
| CN210434379U (en) * | 2019-07-09 | 2020-05-01 | 上海盖艺模塑科技有限公司 | Reinforced homodisperse device |
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Application publication date: 20220405 |