CN107385140A - A kind of manufacturing technique method of pneumatic steelmaking - Google Patents
A kind of manufacturing technique method of pneumatic steelmaking Download PDFInfo
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- CN107385140A CN107385140A CN201710719330.XA CN201710719330A CN107385140A CN 107385140 A CN107385140 A CN 107385140A CN 201710719330 A CN201710719330 A CN 201710719330A CN 107385140 A CN107385140 A CN 107385140A
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- slag
- pneumatic steelmaking
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- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
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- Manufacturing & Machinery (AREA)
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- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention belongs to pneumatic steelmaking production technology field, is related to a kind of manufacturing technique method of pneumatic steelmaking.Present invention mainly solves in convertor steelmaking process, the unstability of reaction between carbon and oxygen and caused splash in stove, the problems such as dry is returned.A kind of manufacturing technique method of pneumatic steelmaking of the present invention, including dynamic pneumatic steelmaking system, data communication system, wherein：Also include gas analysis meter, described gas analysis meter is connected to gather the flue gas in converter flue with the converter flue in dynamic pneumatic steelmaking system by pipeline and analyzes the content of carbon monoxide in flue gas, and transmitted by data communication system to the flushing and casting platform of dynamic pneumatic steelmaking system, recycle dynamic pneumatic steelmaking system real-time rendering to come out of the stove interior CO trend graph, the material in pneumatic steelmaking is conventionally adjusted according to CO trend graph.
Description
Technical field
The invention belongs to pneumatic steelmaking production technology field, is related to a kind of manufacturing technique method of pneumatic steelmaking
Background technology
In recent years, people improve constantly to the quality requirement of steel, and pneumatic steelmaking is an extremely complex process, is adopted
Manually experience control and traditional static models are extremely difficult to desired control accuracy.At present, it is Japanese that some are large-scale with America and Europe
Enterprise is aided with the technologies such as sublance, analysis of fumes, optic probe and clinker on-line checking, successfully on the basis of static models
The whole dynamic control automatic Steelmaking of converter is carried out.Wherein especially so that analysis of fumes dynamic control technology is with fastest developing speed, effect
It is best.But only have part large iron and steel enterprise to be mounted with converter furnace gas analysis on-line control system at home, it is most of middle-size and small-size
Enterprise is still within traditional steel-making pattern of artificial experience, greatly affected the quality of steel and the cost of raw material.
The content of the invention
Present invention is generally directed in convertor steelmaking process, the unstability of reaction between carbon and oxygen and caused splash in stove, return
The problems such as dry, the principle of carbon content real-time change in converter is determined using composition of fumes, there is provided a kind of production work of pneumatic steelmaking
Process.
It is of the invention to be for the technical scheme taken that solves the above problems：
A kind of manufacturing technique method of pneumatic steelmaking, including dynamic pneumatic steelmaking system, data communication system, wherein：Also
Including gas analysis meter, described gas analysis meter is connected use by pipeline with the converter flue in dynamic pneumatic steelmaking system
To gather the flue gas in converter flue and analyze the content of carbon monoxide in flue gas, and transmitted by data communication system to dynamic
The flushing and casting platform of pneumatic steelmaking system, recycle dynamic pneumatic steelmaking system real-time rendering to come out of the stove interior CO trend graph, press
More solito adjusts the material in pneumatic steelmaking according to CO trend graph.
Preferably, a converter smelting cycle of the present invention is divided into three phases, and 0~4min is initial smelting period, 4~
11min is the smelting later stage after 11min~terminate to smelt mid-term, and normal CO trend graph is a smooth curve map,
Gas containing CO caused by the converting process of converter smelting is trapped in slag except a part, and remaining can all exclude stove
Outside, if substantially fallen after rise after the instantaneous value of initial smelting period CO contents peak value occurs in 2~3min, explanation will occur to overflow early stage
Slag phenomenon, the phenomenon are because clinker slag system changes, and more gases are trapped in slag, cause that stove can not be discharged in time
Outside, as increasing gas is obstructed exclusion, the foamed slag of formation also gradually increases until overflowing, and initial smelting period occur needs
To add slag charge in time reduces rifle position in time simultaneously, adjusts slag system；If obvious return occurs in CO trend graph in mid-term is smelted
Expulsion events will be occurred by falling explanation, and it is that C, O react the fierce phase to smelt mid-term, can normally be stablized at one in smelting mid-term CO contents
Spring layer, if foamed occurs in the stage clinker, substantial amounts of gas holdup is may result in slag, gas contains in CO trend graphs
Amount is obvious to be fallen after rise, and clinker also can rapidly expand, splash will occur in the short time, such phenomenon occurs, it is necessary to add slag first
Material breaks foam slag blanket, while changes rifle position, and rifle position, which can be exchanged just, can also tend to low level adjustment slag system, smelt mid-term mistake
There is significantly raised representative and returns dry phenomenon in journey CO trend graph, and such phenomenon tends to return dry mainly due to clinker, even results in
Molten steel is exposed, and caused gas almost all is excluded outside stove, in CO trend graphs gas content also can a significantly raised step, should
Phenomenon can cause molten steel terminal P compositions higher, so needing to improve rifle position slugging in time for such phenomenon, one is formed to promote
Fixed foamed slag maintains steel grade harmful element P exclusion.
The relatively artificial empirical formula steel-making of the inventive method more efficiently prevents the splash of converter, returns the smelting operation such as dry
Accident, the change of the course of reaction, furnace temperature of carbon oxygen and the control of terminal target in stove are more accurately predicted, is greatly improved
Steel-making efficiency and production cost is saved.
Brief description of the drawings
Fig. 1 is the CO of the mid-early stage of the embodiment of the present invention 2 excessive slag trend graph；
Fig. 2 is the trend graph of the CO of mid-term splash in the embodiment of the present invention 3；
Fig. 3 is the trend graph that mid-term returns dry CO in the embodiment of the present invention 4.
Embodiment
Embodiment 1
A kind of manufacturing technique method of pneumatic steelmaking, including dynamic pneumatic steelmaking system, data communication system, wherein：Also
Including gas analysis meter, described gas analysis meter is connected use by pipeline with the converter flue in dynamic pneumatic steelmaking system
To gather the flue gas in converter flue and analyze the content of carbon monoxide in flue gas, and transmitted by data communication system to dynamic
The flushing and casting platform of pneumatic steelmaking system, recycle dynamic pneumatic steelmaking system real-time rendering to come out of the stove interior CO trend graph, press
More solito adjusts the material in pneumatic steelmaking according to CO trend graph, and a converter smelting cycle is divided into three phases, 0~
4min is initial smelting period, and 4~11min is smelting later stage, normal CO trend graph after 11min~terminate to smelt mid-term
For a smooth curve map, gas containing CO caused by the converting process of converter smelting is trapped in slag except a part,
Remaining all can be excluded outside stove, if substantially fallen after rise after the instantaneous value of initial smelting period CO contents peak value occurs in 2~3min,
Illustrating slag phenomenon of overflowing early stage will occur, the phenomenon is because clinker slag system changes, and more gases are trapped in slag,
Cause to discharge out of the furnace in time, as increasing gas is obstructed exclusion, the foamed slag of formation also gradually increase until
Overflow, initial smelting period occur needs to add slag charge in time while reduce rifle position in time, adjusts slag system；If CO in mid-term is smelted
Trend graph there is the obvious explanation that falls after rise expulsion events will occur, it is that C, O react the fierce phase to smelt mid-term, is normally smelting mid-term
CO contents can be stablized in a Spring layer, if foamed occurs in the stage clinker, may result in substantial amounts of gas holdup in slag
In, gas content substantially falls after rise in CO trend graphs, and clinker can also expand rapidly, and splash will occur in the short time, occurs such
Phenomenon breaks foam slag blanket, it is necessary to add slag charge first, while changes rifle position, and rifle position, which can be exchanged just, can also tend to low level
Slag system is adjusted, dry phenomenon is returned in the significantly raised representative of trend graph appearance for smelting mid-term process CO, and such phenomenon is mainly due to stove
Slag tends to return dry, even results in that molten steel is exposed, and caused gas almost all is excluded outside stove, and gas content also can in CO trend graphs
A significantly raised step, the phenomenon can cause molten steel terminal P compositions higher, so needing to improve rifle in time for such phenomenon
Position slugging, certain foamed slag maintenance steel grade harmful element P exclusion is formed to promote.
Embodiment 2
Converter smelting excessive slag early stage：
Among actual production process, smelting initial stage with molten iron the element such as Si, Mn, P and Fe start to aoxidize, C
Also in Simultaneous Oxidation, and as the continuous lifting of temperature, CO contents are also raising, blow 2-3min, first slag of addition
Material and oxidized element also begin to constantly reacting, and form first slag, namely play slag process this when, but by
In early stage temperature and oxygen lance operation influence, directly influence the form and composition of slag system, while be reflected on CO curve maps,
Be exactly CO values after a small leak is reached, start to reduce, see Fig. 1.The phenomenon is because clinker slag system changes, more
Gas be trapped in slag, cause to discharge out of the furnace in time, as increasing gas is obstructed exclusion, the foam of formation
Slag also gradually increases until overflowing, and initial smelting period occur needs to add slag charge in time while reduce rifle position in time, adjusts slag system；
Embodiment 3
Mid-term splash：
CO situations of change are shown in Fig. 3 in furnace gas during clinker splash.If obvious return occurs in CO trend graph in mid-term is smelted
Expulsion events will be occurred by falling explanation, and it is that C, O react the fierce phase to smelt mid-term, can normally be stablized at one in smelting mid-term CO contents
Spring layer, if foamed occurs in the stage clinker, substantial amounts of gas holdup is may result in slag, gas contains in CO trend graphs
Amount is obvious to be fallen after rise, and clinker also can rapidly expand, splash will occur in the short time, such phenomenon occurs, it is necessary to add slag first
Material breaks foam slag blanket, while changes rifle position, and rifle position, which can be exchanged just, can also tend to low level adjustment slag system.
Embodiment 4
Mid-term is returned dry：
CO respective change when Fig. 3 is slag getting dry.There is " hump " in CO in figure 3, and CO content is significantly higher than normally
Value, such phenomenon tend to return dry mainly due to clinker, even result in that molten steel is exposed, and caused gas almost all excludes stove
Outside, in CO trend graphs gas content also can a significantly raised step, the phenomenon can cause molten steel terminal P compositions higher, so
Need to improve rifle position slugging in time for such phenomenon, certain foamed slag maintenance steel grade harmful element P row is formed to promote
Remove.
Claims (2)
1. a kind of manufacturing technique method of pneumatic steelmaking, including dynamic pneumatic steelmaking system, data communication system, it is characterized in that：
Also include gas analysis meter, described gas analysis meter is connected by pipeline with the converter flue in dynamic pneumatic steelmaking system
To gather the flue gas in converter flue and analyze the content of carbon monoxide in flue gas, and transmitted by data communication system to dynamic
The flushing and casting platform of state pneumatic steelmaking system, dynamic pneumatic steelmaking system real-time rendering is recycled to come out of the stove interior CO trend graph,
The material in pneumatic steelmaking is conventionally adjusted according to CO trend graph.
A kind of 2. manufacturing technique method of pneumatic steelmaking according to claim 1, it is characterized in that a described converter smelting
The refining cycle is divided into three phases, and 0~4min be initial smelting period, and for 4~11min to smelt mid-term, 11min~terminate is later smelting
In the later stage, normal CO trend graph is a smooth curve map, gas containing CO caused by the converting process of converter smelting
Except a part is trapped in slag, remaining all can be excluded outside stove, if initial smelting period CO contents instantaneous value 2~
3min is substantially fallen after rise after there is peak value, and slag phenomenon of overflowing early stage will occur for explanation, and the phenomenon is changed because of clinker slag system,
More gases are trapped in slag, cause to discharge out of the furnace in time, as increasing gas is obstructed exclusion, are formed
Foamed slag also gradually increase until overflow, occur initial smelting period need in time add slag charge simultaneously in time reduce rifle position, adjustment
Slag system；If CO trend graph the obvious explanation that falls after rise occurs and expulsion events will occur in mid-term is smelted, it is that C, O are anti-to smelt mid-term
Stress the strong phase, normally smelt mid-term CO contents can stablize in a Spring layer, will if foamed occurs in the stage clinker
Causing substantial amounts of gas holdup, gas content substantially falls after rise in CO trend graphs in slag, and clinker can also expand rapidly, in the short time
Splash will occur, such phenomenon occurs, it is necessary to adding slag charge first breaks foam slag blanket, while changes rifle position, rifle position can be with
Height exchange can also tend to low level and adjust slag system, and the smelting mid-term process CO significantly raised representative of trend graph appearance, which is returned, to be done now
As, such phenomenon mainly due to clinker tends to return dry, even result in that molten steel is exposed, and caused gas almost all excludes stove
Outside, in CO trend graphs gas content also can a significantly raised step, the phenomenon can cause molten steel terminal P compositions higher, so
Need to improve rifle position slugging in time for such phenomenon, certain foamed slag maintenance steel grade harmful element P row is formed to promote
Remove.
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| CN201710719330.XA CN107385140A (en) | 2017-08-21 | 2017-08-21 | A kind of manufacturing technique method of pneumatic steelmaking |
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| CN201710719330.XA CN107385140A (en) | 2017-08-21 | 2017-08-21 | A kind of manufacturing technique method of pneumatic steelmaking |
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| CN107385140A true CN107385140A (en) | 2017-11-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628981A (en) * | 2019-09-26 | 2019-12-31 | 武汉钢铁有限公司 | Solidification experience method for defining splashing in converter blowing period |
| CN112921144A (en) * | 2021-01-25 | 2021-06-08 | 山东莱钢永锋钢铁有限公司 | Method for melting slag by using furnace slag |
Citations (4)
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|---|---|---|---|---|
| CN102344985A (en) * | 2011-11-11 | 2012-02-08 | 田陆 | Method, device and system for controlling steel-making process of converter |
| CN102363825A (en) * | 2011-11-11 | 2012-02-29 | 田陆 | Method, device and system for controlling furnace conditions of convertor steelmaking |
| CN104884641A (en) * | 2013-01-18 | 2015-09-02 | 杰富意钢铁株式会社 | Molten iron pre-treatment method |
| CN105203483A (en) * | 2015-09-29 | 2015-12-30 | 河北钢铁股份有限公司邯郸分公司 | Method for quickly detecting contents of N<2> and CO<2> gas in converter gas |
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2017
- 2017-08-21 CN CN201710719330.XA patent/CN107385140A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344985A (en) * | 2011-11-11 | 2012-02-08 | 田陆 | Method, device and system for controlling steel-making process of converter |
| CN102363825A (en) * | 2011-11-11 | 2012-02-29 | 田陆 | Method, device and system for controlling furnace conditions of convertor steelmaking |
| CN104884641A (en) * | 2013-01-18 | 2015-09-02 | 杰富意钢铁株式会社 | Molten iron pre-treatment method |
| CN105203483A (en) * | 2015-09-29 | 2015-12-30 | 河北钢铁股份有限公司邯郸分公司 | Method for quickly detecting contents of N<2> and CO<2> gas in converter gas |
Non-Patent Citations (1)
| Title |
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| 丁长江 等: "利用炉气CO浓度曲线监控转炉造渣操作", 《中国冶金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628981A (en) * | 2019-09-26 | 2019-12-31 | 武汉钢铁有限公司 | Solidification experience method for defining splashing in converter blowing period |
| CN112921144A (en) * | 2021-01-25 | 2021-06-08 | 山东莱钢永锋钢铁有限公司 | Method for melting slag by using furnace slag |
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Application publication date: 20171124 |
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