CN105274280B - Method for accurately measuring liquid level of molten steel - Google Patents
Method for accurately measuring liquid level of molten steel Download PDFInfo
- Publication number
- CN105274280B CN105274280B CN201410334798.3A CN201410334798A CN105274280B CN 105274280 B CN105274280 B CN 105274280B CN 201410334798 A CN201410334798 A CN 201410334798A CN 105274280 B CN105274280 B CN 105274280B
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- China
- Prior art keywords
- molten steel
- measurement
- converter
- liquid level
- oxygen lance
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 239000007788 liquid Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 66
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000005259 measurement Methods 0.000 claims abstract description 43
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 43
- 239000001301 oxygen Substances 0.000 claims abstract description 43
- 229910052742 iron Inorganic materials 0.000 claims abstract description 33
- 238000007664 blowing Methods 0.000 claims abstract description 15
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 12
- 240000006909 Tilia x europaea Species 0.000 claims description 12
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 12
- 239000004571 lime Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006378 damage Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 239000007921 spray Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 229910000754 Wrought iron Inorganic materials 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000009491 slugging Methods 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a method for accurately measuring the liquid level of molten steel, which is characterized in that a measuring device is additionally arranged at a nozzle of an oxygen lance of a converter, so that the height of the nozzle of the oxygen lance from the liquid level of the molten steel is accurately measured and controlled, and the blowing quality of the molten steel is ensured; the method comprises manufacturing a measuring device; fixing a measuring device at a spray hole of the oxygen lance; setting the height of the oxygen lance and a blowing point; measuring the distance from the welding point position of the measuring rod iron nail to the position of the trace stuck with the iron slag; adding scrap steel into the converter after the measurement is finished, wherein the molten steel liquid level value is BL1+100cm-H + W/3; compared with the prior art, the invention has the beneficial effects that: 1) the method realizes accurate measurement of the liquid level of the molten steel in the converter, is simple, is convenient to operate, and has visual and accurate measurement results; 2) the device is easy to manufacture, and the investment is not increased; 3) the labor intensity of operators is reduced, the harm of heat radiation and harmful gas to human bodies is reduced, and potential safety hazards are eliminated.
Description
Technical field
The present invention relates to converter steelmaking process parameter detecting technical field, more particularly to a kind of accurate measurement liquid steel level
Method.
Background technology
In convertor steelmaking process, converter is adding steel scrap, has converted to start oxygen rifle being down in converter after molten iron and has blown, oxygen rifle
Shower nozzle must be reasonable apart from the height of liquid steel level, so just can guarantee that converting process slugging is good, process decarburization is steady, terminal
Composition is qualified, carbon temperature is coordinated.So ensureing that oxygen gun sprayer is extremely important apart from the degree of accuracy of liquid steel level.
Country's steel mill mostly continues to use traditional manual measurement method, i.e. survey crew's usage amount at converter mouth now
Tool is measured, and not only error is big, directly affects blowing quality；And labor intensity is high, there is certain potential safety hazard.
The content of the invention
The invention provides a kind of method of accurate measurement liquid steel level, pass through the accurate survey to liquid steel level in converter
Amount, it is ensured that the setting value of oxygen gun sprayer to liquid steel level is consistent with actual value in converting process, so as to meet the ring of smelting process
Border requires, and can reduce and dry cause the high-quality thing of phosphorus because seriously being returned in serious big the race slag or stove caused by liquid steel level is forbidden
Therefore.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of method of accurate measurement liquid steel level, comprises the following steps:
1) measurement apparatus is made, including one end is welded with the measuring staff and a circular cone stopper of long iron nail, by circular cone stopper diameter
Larger one end center is fixed on the long iron nail of measuring staff；
2) oxygen rifle is lifted to limes superiors, and measurement apparatus is fixed at nozzle of oxygen lance；
3) oxygen lance operation choosing " manual " and " survey liquid level " state, setting oxygen rifle height；
4) measurement liquid steel level heat is first blended into molten iron, iron making terminate after by converter inclining to zero-bit；
5) oxygen rifle is down to waiting point and then presses operating desk button from limes superiors and be chosen to be oxygen rifle " blowing point "；
6) oxygen rifle is to blunderbuss behind setting position to limes superiors, removes measuring staff, measuring staff lower end enter be stained with after molten iron scum and
Molten iron, measurement measuring staff iron nail bond pad locations are to the distance for being stained with scum vestige position, if measured value is set to H；
7) measurement terminates to add steel scrap in rear converter, and steel scrap amount is designated as W, and original fluid value is set to BL1, then measures molten steel liquid
Face amount is BL=BL1+100cm-H+W/3；
8) after the completion of measurement liquid steel level, oxygen lance operation selection " automatic ", " blowing " pattern, and by the reality of survey calculation
BL values are inputted from operation interface, then start blowing.
Compared with prior art, the beneficial effects of the invention are as follows：
1) the accurate measurement to liquid steel level in converter is realized, method is simple, and easy to operate, intuitive measurement results are accurate；
2) equipment therefor makes easy, does not increase input；
3) labor intensity of operating staff is reduced, the injury of heat radiation and pernicious gas to human body is reduced, eliminates safe hidden trouble.
Brief description of the drawings
Fig. 1 is the structural representation of measurement apparatus of the present invention.
In figure：1. the iron nail of 2. circular cone stopper of measuring staff 3.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings：
A kind of method of accurate measurement liquid steel level of the present invention, comprises the following steps:
1) measurement apparatus is made, including one end is welded with the measuring staff 1 and a circular cone stopper 2 of long iron nail 3, by circular cone stopper 2
One end center being relatively large in diameter is fixed on the long iron nail 3 of measuring staff 1；(see Fig. 1)
2) oxygen rifle is lifted to limes superiors, and measurement apparatus is fixed at nozzle of oxygen lance；
3) oxygen lance operation choosing " manual " and " survey liquid level " state, setting oxygen rifle height；
4) measurement liquid steel level heat is first blended into molten iron, iron making terminate after by converter inclining to zero-bit；
5) oxygen rifle is down to waiting point and then presses operating desk button from limes superiors and be chosen to be oxygen rifle " blowing point "；
6) oxygen rifle removes measurement apparatus to blunderbuss behind setting position to limes superiors, and the lower end of measuring staff 1 is stained with iron after entering molten iron
Slag and molten iron, the bond pad locations of 1 iron nail of measurement measuring staff 3 are to the distance for being stained with scum vestige position, if measured value is set to H；
7) measurement terminates to add steel scrap in rear converter, and steel scrap amount is designated as W, and original fluid value is set to BL1, then measures molten steel liquid
Face amount is BL=BL1+100cm-H+W/3；
8) after the completion of measurement liquid steel level, oxygen lance operation selection " automatic ", " blowing " pattern, and by the reality of survey calculation
BL values are inputted from operation interface, then start blowing.
The measurement liquid steel level heat is from the few heat measurement liquid steel level of scum in hot-metal bottle before iron making, to improve
Measurement accuracy；The heat of measurement liquid steel level is splashed by clinker evacuation after slag, and survey liquid steel level heat is added without the big face of slag charge paving.
Following examples are implemented lower premised on technical solution of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment 1】
See Fig. 1, be the structural representation of measurement apparatus of the present invention.In the present embodiment, a length of 1.5m of measuring staff 1, diameter
15mm, one end is welded with the iron nail 3 of 60mm length, and the top and bottom diameter of circular cone stopper 2 is respectively 40mm and 65mm.
The present embodiment is applied in 260t converters, and oxygen rifle is lifted to limes superiors, and measurement apparatus is fixed on into nozzle of oxygen lance
Place；Oxygen lance operation selects " manual " and " survey liquid level " state, and setting oxygen rifle is highly 100cm；
It is 14CD2538 to measure liquid steel level heat, is first blended into molten iron 235t, iron making terminate after by converter inclining to zero-bit；
Oxygen rifle is down to waiting point and then presses operating desk button from limes superiors and is chosen to be oxygen rifle " blowing point "；
Oxygen rifle removes measurement apparatus to blunderbuss behind setting position to limes superiors, and the lower end of measuring staff 1 is stained with scum after entering molten iron
And molten iron, the bond pad locations of 1 iron nail of measurement measuring staff 3 to the distance for being stained with scum vestige position, measured value H is 105cm；
Measurement terminates to add steel scrap in rear converter, and steel scrap amount W is 30t, and original fluid value BL1 is 215cm, then measures molten steel
Fluid value is BL=BL1+100cm-H+W/3=220cm；
8) after the completion of measurement liquid steel level, oxygen lance operation selection " automatic ", " blowing " pattern, and by the reality of survey calculation
BL values 220cm is inputted from operation interface, then starts blowing.
Converter normally smelts per tour measurement liquid steel level 1 time, is smelted after succeeding in 3 stove molten steel times and measures liquid level.Class
Liquid steel level is remeasured after middle blown converter bottom or change furnace bottom once.Steel scrap post personnel will prepare to convert in time after succeeding
The steel scrap of converter is added after iron, is created conditions to liquid steel level heat is surveyed.
Pass through the accurate measurement to liquid steel level in converter, it is ensured that in converting process oxygen gun sprayer to liquid steel level setting
Value is consistent with actual value, so that the oxygen stream stock for being conducive to oxygen gun sprayer to spray can be good at being stirred molten steel bath,
And ensure certain impact depth, uniformly heated up so as to meet smelting process bath temperature, decarbonization rate is reasonable, while meeting eventually
Point molten steel composition temperature is uniformly qualified.And can greatly reduce because tight in serious big the race slag or stove caused by liquid steel level is forbidden
Return to and dry cause the high-quality accident of phosphorus.
Claims (1)
1. a kind of method of accurate measurement liquid steel level, it is characterised in that comprise the following steps:
1) measurement apparatus is made, including one end is welded with the measuring staff and a circular cone stopper of long iron nail, and circular cone stopper is relatively large in diameter
One end center be fixed on the long iron nail of measuring staff；
2) oxygen rifle is lifted to limes superiors, and measurement apparatus is fixed at nozzle of oxygen lance；
3) oxygen lance operation choosing " manual " and " survey liquid level " state, setting oxygen rifle height；
4) measurement liquid steel level heat is first blended into molten iron, iron making terminate after by converter inclining to zero-bit；
5) oxygen rifle is down to waiting point and then presses operating desk button from limes superiors and be chosen to be oxygen rifle " blowing point "；
6) oxygen rifle removes measuring staff to blunderbuss behind setting position to limes superiors, and measuring staff lower end is stained with scum and molten iron after entering molten iron,
Measuring staff iron nail bond pad locations are measured to the distance for being stained with scum vestige position, if measured value is H, unit is cm；
7) measurement terminates to add steel scrap in rear converter, and steel scrap amount is designated as W, and unit is t；Original fluid value is set to BL1, and unit is
cm；Then measurement liquid steel level value is BL=BL1+100cm-H+W/3, and unit is cm；
8) after the completion of measurement liquid steel level, oxygen lance operation selection " automatic ", " blowing " pattern, and by the actual BL values of survey calculation
From operation interface input, then start blowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410334798.3A CN105274280B (en) | 2014-07-11 | 2014-07-11 | Method for accurately measuring liquid level of molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410334798.3A CN105274280B (en) | 2014-07-11 | 2014-07-11 | Method for accurately measuring liquid level of molten steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105274280A CN105274280A (en) | 2016-01-27 |
| CN105274280B true CN105274280B (en) | 2017-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410334798.3A Active CN105274280B (en) | 2014-07-11 | 2014-07-11 | Method for accurately measuring liquid level of molten steel |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201473560U (en) * | 2009-09-07 | 2010-05-19 | 新疆八一钢铁股份有限公司 | Special-purpose tool for measuring the distance between oxygen gun nozzle and furnace bottom in converter |
| CN201828313U (en) * | 2010-09-20 | 2011-05-11 | 宝山钢铁股份有限公司 | Zero gravity type hot metal liquid level height detection device |
| CN103290165A (en) * | 2013-06-11 | 2013-09-11 | 鞍钢股份有限公司 | Method for measuring distance between oxygen lance nozzle and molten steel liquid level |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0551620A (en) * | 1991-08-26 | 1993-03-02 | Nkk Corp | Method or measuring slag height by sub-lance |
-
2014
- 2014-07-11 CN CN201410334798.3A patent/CN105274280B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201473560U (en) * | 2009-09-07 | 2010-05-19 | 新疆八一钢铁股份有限公司 | Special-purpose tool for measuring the distance between oxygen gun nozzle and furnace bottom in converter |
| CN201828313U (en) * | 2010-09-20 | 2011-05-11 | 宝山钢铁股份有限公司 | Zero gravity type hot metal liquid level height detection device |
| CN103290165A (en) * | 2013-06-11 | 2013-09-11 | 鞍钢股份有限公司 | Method for measuring distance between oxygen lance nozzle and molten steel liquid level |
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| Publication number | Publication date |
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| CN105274280A (en) | 2016-01-27 |
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