CN102758050A - Smelting process of automatic steelmaking system of medium and small-sized converter - Google Patents
Smelting process of automatic steelmaking system of medium and small-sized converter Download PDFInfo
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- CN102758050A CN102758050A CN2012101371758A CN201210137175A CN102758050A CN 102758050 A CN102758050 A CN 102758050A CN 2012101371758 A CN2012101371758 A CN 2012101371758A CN 201210137175 A CN201210137175 A CN 201210137175A CN 102758050 A CN102758050 A CN 102758050A
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Abstract
The invention discloses a smelting process of an automatic steelmaking system of a medium and small-sized converter. The process comprises the following steps of: 1) carrying out static calculation, adding molten iron and/or waste steel and converting the molten iron and/or the waste steel; 2) entering a static control process; 3) measuring a T-C electric signal value by using a sublance so as to carry out dynamic control; 4) adding a coolant to the converted molten iron and/or waste steel; 5) comparing an actual oxygen supply quantity and a calculated oxygen supply quantity and judging a comparing result; 6) elevating an oxygen lance before a converting end point; 7) measuring a T-C electric signal value by using the sublance; and 8) comparing end point values so as to reblow the molten iron and/or waste steel and/or discharge steel; and the process of measuring the T-C electric signal value in the 3) comprises the following substeps of: 3a) elevating the oxygen lance and tilting a furnace body; and 3b) driving a small platform trolley loaded with the sublance to approach the furnace body, and enabling the sublance to extend into the furnace body so as to measure the T-C electric signal value. According to the invention, by using a sublance testing process, functions of the sublance of the original computer steelmaking system are kept, the contradict that the process of measuring the sublance of the original computer steelmaking system cannot be used for the medium and small-sized converters is eliminated, protective measures for the measurement of the sublance are reduced, and equipment cost and operation cost of the sublance are also reduced.
Description
Technical field
The present invention relates to a kind of process for making, relate in particular to the smelting technology of the automatic steelmaking system of a kind of middle-size and small-size converter.
Background technology
Sublance computingmachine steel-smelting technology because it can simplify the operation course, has carried out converter terminal control accurately since twentieth century occurred in 70 years, practice thrift a large amount of production costs, thereby on mammoth conveter, obtain promotion and application rapidly.But for middle-size and small-size converter; Restriction owing to following reason; Can't be applied to produce: (1) middle-size and small-size converter mouth is little, and converter oxygen gun and sublance are difficult in stove, work simultaneously, and the oxygen supply air-flow of converter oxygen gun can have a strong impact on the work of sublance; The survey of sublance becomes the accuracy of rate and measurement greatly to reduce, even can burn out sublance; (2) sublance measuring sonde cost is high, has had a strong impact on the ton steel economic benefit of calculating steelmaking system; (3) the fire door slag ratio is more, and when descending sublance, the fire door slag has a strong impact on its work, even breaks sublance, causes sublance can not work at all.Based on above reason, middle-size and small-size converter steel factory utilizes sublance to control automatically to be a very difficulty and without of help, does not still have the terms of settlement of correspondence in the process for making of prior art, can not satisfy people's demand.
Summary of the invention
The object of the present invention is to provide a kind of smelting technology of easy and simple to handle, the economical and practical automatic steelmaking system of middle-size and small-size converter, solve the shortcoming that prior art exists.
The present invention adopts following technical scheme to realize:
The smelting technology of the automatic steelmaking system of a kind of middle-size and small-size converter, this technology comprises the steps:
1) carries out static calculation, add molten iron and/or steel scrap and blowing;
2) static control process;
3) utilize sublance to measure the T-C value of electrical signals, dynamically control;
4) add refrigerant;
5) actual oxygen-supplying amount and calculating oxygen-supplying amount are judged comparative result;
6) promote the oxygen rifle before the blow end point;
7) utilize sublance to measure the T-C value of electrical signals;
8) compare end point values, re-blow and/or tap;
It is characterized in that the process of in step 3), measuring the T-C value of electrical signals is:
3a) promote the oxygen rifle and the body of heater that tilts; 3b) drive be mounted with sublance the platform dolly near body of heater, sublance is stretched into body of heater measures the T-C value of electrical signals.
Further, the process of measurement T-C value of electrical signals is in step 7): 7a) promote the oxygen rifle and the body of heater that tilts; 7b) drive be mounted with sublance the platform dolly near body of heater, sublance is stretched into body of heater measures the T-C value of electrical signals.
The useful technique effect that the present invention possesses is:
Sublance test technology of the present invention; The function that has kept former computingmachine steelmaking system sublance has solved former computingmachine steelmaking system sublance again and has measured the contradiction that can not be used for middle-size and small-size converter, makes middle-size and small-size converter adopt computingmachine steel-making to become a reality; Because native system adopts the mode that the oxygen rifle is measured sublance of putting forward; Reduce the sfgd. that sublance is measured, can simplify the sublance structure in a large number, reduced sublance equipment cost and working cost.Simultaneously, also simplified the structure of TSC and TSO probe, making TSC and TSO probe price reduce becomes possibility, has guaranteed that steel mill adopts the economic benefit of computingmachine steel-making.
Description of drawings
Fig. 1 is the middle-size and small-size converter steelmaking process schema of prior art.
Fig. 2 is a middle-size and small-size converter steelmaking process schema of the present invention.
Embodiment
Through facing the description of embodiment down; To help public understanding the present invention more; But can't be regarded as restriction by the concrete embodiment that the applicant is given to technical scheme of the present invention, any definition to parts or technical characterictic change and/or to one-piece construction do form but not the conversion of essence all should be regarded as the protection domain that technical scheme of the present invention limits.
Computingmachine steel-making model is actually the semi-theoretical incremental model of semiempirical, and it comes the approaching reality of producing gradually with material balance and the thermally equilibrated theoretical basis that is calculated as through self study.It is static model and dynamicmodel that the calculating model of making steel is divided into two parts; Static model are responsible for material balance and thermally equilibrated calculating; Dynamicmodel is proofreaied and correct the miscalculation of static model through the relevant C-T information that steel-making measures before the terminal point, thereby reaches the purpose of accurate control converter steelmaking C-T.
Normal computingmachine steelmaking system is at the 85% at present sublance one-shot measurement of converter oxygen supply at heat, detects converter molten pool C-T and the sampling of this moment, and changes detected C-T over to dynamic control that computingmachine is made steel as the starting point of dynamic process.Sublance is a kind of test set, and its effect just detects converter molten pool C-T and the sampling of this moment.If the C-T that we utilize alternate manner to obtain converter molten pool takes a sample simultaneously, can use automatic steel-smelting technology equally.Move to the converter steelmaking platform to the measuring ability of sublance from converter top such as us; Carry the oxygen rifle 85% o'clock of heat in the converter oxygen supply; The C-T of the measurement of falling stove converter molten pool also takes a sample, and pass to computingmachine to a C-T signal that measures, and is the dynamic control that can carry out computingmachine steel-making equally.In order to be different from revolving furnace sublance, can this equipment with sublance all functions be referred to as the special-shaped sublance that changes.Special-shaped sublance mainly is made up of following components:
(1) platform cart system.The operation of the system of being responsible for is delivered to the measuring position to measuring system.
(2) measuring system.Be responsible for taking out the C-T electrical signal and the sampling in molten bath.
(3) Signal permuting system.Be responsible for the C-T electrical signal that take out in the molten bath is replaced as the C-T value, and deliver to computingmachine steel-making model and carry out dynamic calculation.
As depicted in figs. 1 and 2; Original process for making flow process and sublance test technology of the present invention are mutual; Mainly be to have changed the mode of obtaining C-T and sampling; Changed the Starting mode of dynamicmodel simultaneously,, possessed following useful technique effect though influence the converter smelting activity time about 2 minutes during because of the blow end point prerequisite oxygen rifle measurement of falling stove molten bath TSC:
(1) blow end point prerequisite oxygen rifle is measured molten bath TSC, has solved middle-size and small-size converter oxygen gun and sublance work problem in stove simultaneously.
(2) converter oxygen gun can not influence the work of sublance, and the survey of sublance becomes the accuracy of rate and measurement greatly to improve.
(3) the sublance measuring sonde cost height that decreases.
(4) sublance is measured and not influenced by the fire door slag.
(5) when sublance TSC one-shot measurement is unsuccessful, can carry out secondary and measure, improved the dynamic rate of computingmachine steel-making.
Embodiment one: the smelting technology of the automatic steelmaking system of middle-size and small-size converter, this technology comprises the steps:
1) carries out static calculation, add molten iron and/or steel scrap and blowing;
2) static control process;
3) utilize sublance to measure the T-C value of electrical signals, dynamically control;
4) add refrigerant;
5) actual oxygen-supplying amount and calculating oxygen-supplying amount are judged comparative result;
6) promote the oxygen rifle before the blow end point;
7) utilize sublance to measure the T-C value of electrical signals;
8) compare end point values, re-blow and/or tap;
Wherein, the process of measurement T-C value of electrical signals is in step 3):
3a) promote the oxygen rifle and the body of heater that tilts; The platform dolly that 3b) driving is mounted with sublance on the converter steelmaking platform stretches into body of heater with sublance and measures the T-C value of electrical signals near body of heater.
Embodiment two:
The smelting technology of the automatic steelmaking system of middle-size and small-size converter, this technology comprises the steps:
1) carries out static calculation, add molten iron and/or steel scrap and blowing;
2) static control process;
3) utilize sublance to measure the T-C value of electrical signals, dynamically control;
4) add refrigerant;
5) actual oxygen-supplying amount and calculating oxygen-supplying amount are judged comparative result;
6) promote the oxygen rifle before the blow end point;
7) utilize sublance to measure the T-C value of electrical signals;
8) compare end point values, re-blow and/or tap;
Wherein, the process of measurement T-C value of electrical signals is in step 7): 7a) promote the oxygen rifle and the body of heater that tilts; The platform dolly that 7b) driving is mounted with sublance on the converter steelmaking platform stretches into body of heater with sublance and measures the T-C value of electrical signals near body of heater.
Embodiment three:
1) carries out static calculation, add molten iron and/or steel scrap and blowing;
2) static control process;
3) utilize sublance to measure the T-C value of electrical signals, dynamically control;
4) add refrigerant;
5) actual oxygen-supplying amount and calculating oxygen-supplying amount are judged comparative result;
6) promote the oxygen rifle before the blow end point;
7) utilize sublance to measure the T-C value of electrical signals;
8) compare end point values, re-blow and/or tap;
Wherein, the process of measurement T-C value of electrical signals is in step 3):
3a) promote the oxygen rifle and the body of heater that tilts; The platform dolly that 3b) driving is mounted with sublance on the converter steelmaking platform stretches into body of heater with sublance and measures the T-C value of electrical signals near body of heater.
The process of in step 7), measuring the T-C value of electrical signals is: 7a) promote the oxygen rifle and the body of heater that tilts; The platform dolly that 7b) driving is mounted with sublance on the converter steelmaking platform stretches into body of heater with sublance and measures the T-C value of electrical signals near body of heater.
In the above-described embodiments, measure T-C and refer to: T is a thermometric, and C just decides carbon, the electrical signal of molten bath T, C, O for measuring carbon.
The meaning of TSC, TSO:
When the electrical signal of molten bath T refers to the molten bath thermometric, the electrical signal that measured temperature is corresponding.
When the electrical signal of molten bath C refers to the molten bath carbon determination, the electrical signal that the Tc observed value is corresponding, Tc can calculate molten bath carbon determination value.
When the electrical signal of molten bath O refers to the molten bath oxygen determination, the electrical signal that molten bath oxygenation measurement value is corresponding.
The sublance of special-shaped sublance computingmachine steelmaking system is measured and is adopted special-purpose TSC and TSO to pop one's head in, and can measure the electrical signal of molten bath T, C, O fast, and the concentration that is replaced as T, C, O is exported by computingmachine.This metering system has kept the function of former computingmachine steelmaking system sublance, has solved former computingmachine steelmaking system sublance again and has measured the contradiction that can not be used for middle-size and small-size converter, makes middle-size and small-size converter adopt computingmachine steel-making to become a reality.Put forward the mode that the oxygen rifle is measured sublance because native system adopts, reduced the sfgd. that sublance is measured, can simplify the sublance structure in a large number, reduce sublance equipment cost and working cost.Simultaneously, also simplified the structure of TSC and TSO probe, making TSC and TSO probe price reduce becomes possibility, has guaranteed that steel mill adopts the economic benefit of computingmachine steel-making.
Adopt sublance test technology provided by the invention, reached following effect at test phase:
It is low that C-T measures cost, and the ton steel is less than 1 yuan.
Improve the level of management and the converter operant level of steel mill, make operational standardization and simplification, make and manage rationalization and standardization more;
Production planning management with complete function can partly be realized the function of three grades of machines;
Realization robotization steel-making, reinforced, behaviour's rifle and terminal point catch carbon etc. are full-automatic, and the operative employee need only be absorbed in process monitoring;
Steelmaking process is controlled by under slip-stick artist's control more. reduce operative employee's operation burden; Realize monitoring in real time, the generation of minimizing accident;
Accurate calculation flux add-on is being guaranteed under the prerequisite of steel quality, saves the add-on of flux, optimizes pack into the system and the process control of main raw material;
Can improve the terminal point hit rate of converter. reduce the rate of re-blowing. reduce iron and steel stock consumption. fall to alloy consumption;
Model has the molten iron station, the Operating Guideline function at steel scrap station;
Take into full account the abnormal factors that plant produced is actual and possibly exist, with the production met in practice of factory;
The every stove of smelting cycle reduces 3 minutes; Molten iron consumption reduction is 10kg/t; Steel scrap consumption raising amount is 10kg/t; The flow of oxygen reduction is 3.5m/t; Lime consumption reduces 15.2kg/t; Molten steel terminal point (Tfe) is reduced to 17.3% from 23.5%, and aluminium consumption reduction is the 24kg/ stove; Ferromanganese consumption reduction is the 60kg/ stove; Save the energy and be equivalent to 20 ℃; Anti-material loss reduces 20%.
Can show the advantage of sublance test technology of the present invention better through following form:
Certainly; The present invention can also have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (2)
1. the smelting technology of the automatic steelmaking system of middle-size and small-size converter, this technology comprises the steps:
1) carries out static calculation, add molten iron and/or steel scrap and blowing;
2) static control process;
3) utilize sublance to measure the T-C value of electrical signals, dynamically control;
4) add refrigerant;
5) actual oxygen-supplying amount and calculating oxygen-supplying amount are judged comparative result;
6) promote the oxygen rifle before the blow end point;
7) utilize sublance to measure the T-C value of electrical signals;
8) compare end point values, re-blow and/or tap;
It is characterized in that the process of in step 3), measuring the T-C value of electrical signals is:
3a) promote the oxygen rifle and the body of heater that tilts; The platform dolly that 3b) driving is mounted with sublance on the converter steelmaking platform stretches into body of heater with sublance and measures the T-C value of electrical signals near body of heater.
2. the smelting technology of the automatic steelmaking system of middle-size and small-size converter according to claim 1 is characterized in that, the process of in step 7), measuring the T-C value of electrical signals is: 7a) promote the oxygen rifle and the body of heater that tilts; The platform dolly that 7b) driving is mounted with sublance on the converter steelmaking platform stretches into body of heater with sublance and measures the T-C value of electrical signals near body of heater.
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| CN2012101371758A CN102758050A (en) | 2012-05-07 | 2012-05-07 | Smelting process of automatic steelmaking system of medium and small-sized converter |
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| CN2012101371758A CN102758050A (en) | 2012-05-07 | 2012-05-07 | Smelting process of automatic steelmaking system of medium and small-sized converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846150A (en) * | 2014-02-19 | 2015-08-19 | 宝山钢铁股份有限公司 | Method for smelting low-aluminium moulded steel |
| CN109487030A (en) * | 2017-09-10 | 2019-03-19 | 南京梅山冶金发展有限公司 | Converter rush-harvesting and rush-planting coordinated control system and inter-linked controlling method |
| CN109517937A (en) * | 2019-01-10 | 2019-03-26 | 山东莱钢永锋钢铁有限公司 | A kind of converter smelting heat balance method |
Citations (1)
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| CN201670854U (en) * | 2010-05-13 | 2010-12-15 | 武汉钢铁(集团)公司 | Vehicle for carbon determination and temperature measurement before converter |
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2012
- 2012-05-07 CN CN2012101371758A patent/CN102758050A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201670854U (en) * | 2010-05-13 | 2010-12-15 | 武汉钢铁(集团)公司 | Vehicle for carbon determination and temperature measurement before converter |
Non-Patent Citations (1)
| Title |
|---|
| 任朝廷等: "转炉自动炼钢技术开发应用实践", 《第七界（2009）中国钢铁年会论文集》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846150A (en) * | 2014-02-19 | 2015-08-19 | 宝山钢铁股份有限公司 | Method for smelting low-aluminium moulded steel |
| CN104846150B (en) * | 2014-02-19 | 2017-03-29 | 宝山钢铁股份有限公司 | Low aluminum dipping form cast steels melting method |
| CN109487030A (en) * | 2017-09-10 | 2019-03-19 | 南京梅山冶金发展有限公司 | Converter rush-harvesting and rush-planting coordinated control system and inter-linked controlling method |
| CN109517937A (en) * | 2019-01-10 | 2019-03-26 | 山东莱钢永锋钢铁有限公司 | A kind of converter smelting heat balance method |
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Application publication date: 20121031 |