CN103305656B - A kind of IF steel RH vacuum decarburization course control method for use - Google Patents
A kind of IF steel RH vacuum decarburization course control method for use Download PDFInfo
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Abstract
The invention discloses a kind of IF steel RH vacuum decarburization course control method for use, in vacuum decarburization process, set up Decarburization Control model, carry out practical operation according to the parameter of described Decarburization Control model output, control vacuum decarburization process; The parameter of described Decarburization Control model comprises molten steel primary condition, blowing oxygen quantity, temperature adjustment adding amount of scrap steel, deoxidation carbon dust addition and aluminum shot addition etc.; Described Decarburization Control model can calculate the required blowing oxygen quantity of decarbonizing process, cooling adding amount of scrap steel, deoxidation carbon dust addition automatically according to described molten steel primary condition, dopes decarburization terminal activity oxygen content and calculates the required aluminum shot addition of deoxidation and alloying. The IF steel RH decarbonizing process Decarburization Control model that the present invention develops, meet well Production requirement, operator carries out production process control according to model calculated value, has improved IF steel oxygen blast hit rate, has effectively reduced IF steel decarburization terminal activity oxygen content, has reduced aluminum shot consumption.<!--1-->
Description
Technical field
The invention belongs to a kind of ultra-low-carbon steel production process control manufacturing technology field, specifically, relate to a kind of IF steel RH vacuum decarburization course control method for use.
Background technology
At present, in the prior art, IF steel, full name is Interstitial-FreeSteel,Gapless atomic steel, also claims ultra-low-carbon steel sometimes, has extremely excellent deep drawability, stretches nowLong rate and r value can reach more than 50% and 2.0, in auto industry, are widely applied. RH refiningFull name is RH vacuum circulation degassing purifying method. Invented by German in nineteen fifty-nine, wherein RH is for working asShi Deguo adopts the first letter of the Liang Ge producer of RH refining techniques.
IF steel is the typical steel grade in plate for high-level automobile, is to weigh a national autobody sheet to produceOne of important symbol, the high Corrosion Protection deep-draw heat of getting up taking IF steel as base growth at presentThe series such as zinc-plated IF steel plate, the intensity I of leaping high F steel plate, deep-draw high strength baking hardening IF steel plate is superMild steel, has been widely used in the production of car inner plate and panel.
Ge great steel mill can production carbon content be less than the ultra low carbon IF steel below 0.0020% at present, butSmelting process can effectively be controlled decarburization terminal activity oxygen content and aluminium in realizing dark decarburizationGrain consumption remains a difficult problem.
" iron and steel alum titanium " magazine, in January, 2009 (the 30th the 1st phase of volume, 68th～72 pages, IF steel carbonContent destabilizing factor is analyzed, the works such as Chen Liang) report that to climb steel IF steel carbon content control unstableFactor, wherein the unstable of decarburization terminal activity Control for Oxygen Content is to cause IF steel aim carbon to containMeasure one of unsettled key factor, need to improve the oxygen blown hit rate of IF steel.
" China rare earth journal " magazine, in August, 2008 (the 26th volume, the 26th phase, 608th～612 pages, the RH vacuum decarburization process exploitation of extremely low carbon IF steel, the works such as Zheng Jianzhong) and report that Baosteel passes throughThe decarburization of IF steelThe foundation of model, has realized the production actual achievement that IF steel carbon content is less than 0.0020%, and propose needs simultaneouslyOxygen content when priority control converter tapping, avoids Molten Steel over-oxidation to cause decarburization terminal activity oxygenContent is higher.
The IF steel that above-mentioned Liang Jia iron and steel enterprise all can production carbon content be less than 0.0020%, but steel pair climbedThe improper meeting of control of decarburization terminal oxygen content causes the carbon content of part heat to exceed standard; And Baosteel is logicalCross and set up IF steel decarbonizing process Decarburization Control model and can stablize control carbon content, but to converterHave higher requirement, if there is converter terminal peroxidating molten steel, its model can not be adoptedThe measure of getting effectively reduces decarburization terminal activity oxygen content.
Summary of the invention
Technical problem to be solved by this invention is that special IF steel RH is true owing to lacking in prior artEmpty decarbonizing process control, causes the improper meeting of control of decarburization terminal oxygen content to cause part heatCarbon content exceed standard; Or only can stablize control by setting up IF steel decarbonizing process Decarburization Control modelCarbon content processed, but converter is had higher requirement, if there is converter terminal peroxidatingMolten steel, its model can not take measures effectively to reduce the technology such as decarburization terminal activity oxygen content and askTopic, and a kind of IF steel RH vacuum decarburization course control method for use is provided.
Design of the present invention is that technical problem to be solved by this invention is to develop IF steel RH vacuum fineThe automatic calculating Decarburization Control model of refining process decarbonizing process, model can be according to molten steel initial stripPart calculates the required blowing oxygen quantity of decarbonizing process automatically, cooling adding amount of scrap steel, deoxidation carbon dust addEnter amount, dope decarburization terminal activity oxygen content and calculate the required aluminum shot of deoxidation and alloyingAddition, has changed above-mentioned important parameter in the past and, by the artificial mode of production of calculating of operator, has subtractedThe defective stove number bringing because of maloperation less, realizes standardized work.
By standardized work, raising IF steel oxygen blast hit rate, reduction IF steel decarburization terminal activity oxygen containAmount and minimizing aluminum shot consumption, reach and improve the object that steel quality reduces production costs.
Technical scheme provided by the present invention is, a kind of IF steel RH vacuum decarburization course control method for use,VeryIn empty decarbonizing process, set up Decarburization Control model, according to the parameter of described Decarburization Control model outputCarry out practical operation, control vacuum decarburization process; The parameter of described Decarburization Control model comprises steelWater primary condition, blowing oxygen quantity, temperature adjustment adding amount of scrap steel, deoxidation carbon dust addition and aluminum shot addAmount etc.; Described Decarburization Control model can calculate decarburization automatically according to described molten steel primary conditionBlowing oxygen quantity, cooling adding amount of scrap steel, deoxidation carbon dust addition that process is required, dope decarburizationTerminal activity oxygen content also calculates the required aluminum shot addition of deoxidation and alloying.
The foundation of described Decarburization Control model is according to being:
Front carbon content of molten steel Changing Pattern, described Decarburization Control model are processed to RH in statistical analysis Argon stationCalculate RH and process front molten steel initial carbon content;
Statistical analysis RH processing procedure liquid steel temperature Changing Pattern, described Decarburization Control model calculate intoEnsure that processing endpoint molten steel temperature needs the blowing oxygen quantity of chemical heating;
Statistical analysis RH processing procedure temperature changing regularity, described model calculates as ensureing to process terminalThe cooling steel scrap consumption that liquid steel temperature need add;
The resistance to material of statistical analysis RH vacuum tank to pass in molten steel oxygen, molten steel initial temperature, initial activity oxygen andInitial carbon content, described Decarburization Control model calculates as ensureing that endpoint molten steel carbon content meets and wantsAsk and need to force required blowing oxygen quantity or the deoxidation carbon dust addition of decarburization.
When molten steel RH initial temperature is 1624 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.051%, blowing oxygen quantity 335Nm3, cooling adding amount of scrap steel 1275Kg, decarburization terminalActivity oxygen content 320%, deoxidation C powder addition 0Kg.
When molten steel RH initial temperature is 1610 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.04%, blowing oxygen quantity 170Nm3, cooling adding amount of scrap steel 0Kg, decarburization terminal activityOxygen content 320%, deoxidation C powder addition 0Kg.
When molten steel RH initial temperature is 1626 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginPhosphorus content 0.039%, blowing oxygen quantity 200Nm3, cooling adding amount of scrap steel 1275Kg, decarburization terminal is livedDegree oxygen content 320%, deoxidation C powder addition 0Kg.
When molten steel RH initial temperature is 1609 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.039%, blowing oxygen quantity 185Nm3, cooling adding amount of scrap steel 0Kg, decarburization terminal activityOxygen content 320%, deoxidation C powder addition 0Kg.
When molten steel RH initial temperature is 1619 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.03%, blowing oxygen quantity 80Nm3, cooling adding amount of scrap steel 0Kg, decarburization terminal activity oxygenContent 320%, deoxidation C powder addition 0Kg.
Adopt technical scheme provided by the present invention, can effectively solve owing to lacking in prior art speciallyThe IF steel RH vacuum decarburization process control of door, causes the improper meeting of control to decarburization terminal oxygen contentCause the carbon content of part heat to exceed standard; Or only by setting up IF steel decarbonizing process Decarburization Control mouldType can be stablized control carbon content, but converter is had higher requirement, if there is turningStove terminal peroxidating molten steel, its model can not take measures effectively to reduce decarburization terminal activity oxygenThe technical problems such as content; Meanwhile, the IF steel RH decarbonizing process Decarburization Control mould that the present invention developsType, through repeatedly revising, has met Production requirement well, and operator is according to model calculated valueCarry out production process control, improved IF steel oxygen blast hit rate, effectively reduced the decarburization of IF steelTerminal activity oxygen content, has reduced aluminum shot consumption.
Detailed description of the invention
Technical scheme provided by the present invention is, a kind of IF steel RH vacuum decarburization course control method for use,In vacuum decarburization process, set up Decarburization Control model, according to the ginseng of described Decarburization Control model outputNumber carries out practical operation, controls vacuum decarburization process; The parameter of described Decarburization Control model comprisesMolten steel primary condition, blowing oxygen quantity, temperature adjustment adding amount of scrap steel, deoxidation carbon dust addition and aluminum shot addEnter amount etc.; Described Decarburization Control model can calculate de-according to described molten steel primary condition automaticallyBlowing oxygen quantity, cooling adding amount of scrap steel, deoxidation carbon dust addition that carbon process is required, dope de-Carbon terminal activity oxygen content also calculates the required aluminium of deoxidation and alloyingGrain addition.
The foundation of described Decarburization Control model is according to being:
Front carbon content of molten steel Changing Pattern, described Decarburization Control model are processed to RH in statistical analysis Argon stationCalculate RH and process front molten steel initial carbon content;
Statistical analysis RH processing procedure liquid steel temperature Changing Pattern, described Decarburization Control model calculate intoEnsure that processing endpoint molten steel temperature needs the blowing oxygen quantity of chemical heating;
Statistical analysis RH processing procedure temperature changing regularity, described model calculates as ensureing to process terminalThe cooling steel scrap consumption that liquid steel temperature need add;
The resistance to material of statistical analysis RH vacuum tank to pass in molten steel oxygen, molten steel initial temperature, initial activity oxygen andInitial carbon content, described Decarburization Control model calculates as ensureing that endpoint molten steel carbon content meets and wantsAsk and need to force required blowing oxygen quantity or the deoxidation carbon dust addition of decarburization.
When molten steel RH initial temperature is 1624 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.051%, blowing oxygen quantity 335Nm3, cooling adding amount of scrap steel 1275Kg, decarburization terminalActivity oxygen content 320%, deoxidation C powder addition 0Kg.
When molten steel RH initial temperature is 1610 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.04%, blowing oxygen quantity 170Nm3, cooling adding amount of scrap steel 0Kg, decarburization terminal activityOxygen content 320%, deoxidation C powder addition 0Kg.
When molten steel RH initial temperature is 1626 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.039%, blowing oxygen quantity 200Nm3, cooling adding amount of scrap steel 1275Kg, decarburization terminalActivity oxygen content 320%, deoxidation C powder addition 0Kg.
When molten steel RH initial temperature is 1609 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.039%, blowing oxygen quantity 185Nm3, cooling adding amount of scrap steel 0Kg, decarburization terminal activityOxygen content 320%, deoxidation C powder addition 0Kg.
When molten steel RH initial temperature is 1619 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.03%, blowing oxygen quantity 80Nm3, cooling adding amount of scrap steel 0Kg, decarburization terminal activity oxygenContent 320%, deoxidation C powder addition 0Kg.
The present invention relates to liquid steel refining field, particularly the oxygen blast of IF steel RH vacuum refining decarbonizing process behaviourThe control mode of work and decarburization terminal activity oxygen.
RH is according to the difference of molten steel initial carbon content, oxygen content and liquid steel temperature, and processing mode also to some extentDifference, temperature height need add the cooling of temperature adjustment steel scrap; Carbon content is high, the low oxygen decarburization that needs of oxygen content;And carbon content low oxygen content is when high, needs to add carbon dust deoxidation.
According to IF steel RH knowhow in recent years, this object target is developed RH decarbonizing processAutomatically computation model, model can be according to molten steel primary condition, calculates blowing oxygen quantity, temperature adjustment steel scrapAddition, deoxidation carbon dust addition and aluminum shot addition etc., effectively improved RH processing procedure eachThe hit rate of item technical indicator.
Decarburization model is set up according to as follows:
(1) front carbon content of molten steel Changing Pattern, model prediction RH place are processed to RH in statistical analysis Argon stationMolten steel initial carbon content before reason;
(2) statistical analysis RH processing procedure liquid steel temperature Changing Pattern, model prediction is processed eventually for ensureingPoint liquid steel temperature needs the blowing oxygen quantity of chemical heating;
(3) statistical analysis RH processing procedure temperature changing regularity, model prediction is for ensureing to process terminal steelThe cooling steel scrap consumption that coolant-temperature gage need add;
(4) the resistance to material of statistical analysis RH vacuum tank passes oxygen, molten steel initial temperature, initial activity in molten steelOxygen and initial carbon content, model prediction needs by force for ensureing that endpoint molten steel carbon content meets the requirements
The IF steel RH decarbonizing process Decarburization Control model that the present invention develops, through repeatedly revising, fineGround has met Production requirement, formally comes into operation in 2010, and operator is according to model calculated valueCarry out production process control, improved IF steel oxygen blast hit rate, effectively reduced the decarburization of IF steelTerminal activity oxygen content,Reduce aluminum shot consumption.
In concrete enforcement, IF steel production process is after having been used process Decarburization Control model, and RH is rawProduct IF steel oxygen blast qualification rate rate, decarburization terminal activity oxygen qualification rate improved constantly, by 2010 11Month oxygen blast qualification rate and decarburization terminal activity oxygen qualification rate have reached respectively 95.1% and 92.5%.
IF steel ton steel aluminum shot consumption, also by the average 2Kg of 2009, has been reduced to 1.15Kg, produces with RH40000 tons of IF steel monthly outputs, aluminum shot production cost is 14.96 yuan/Kg, calculates monthly because aluminum shot disappearsConsumption reduces the production cost producing and reduces: (2-1.15) × 40000 × 14.96 ÷ 10000=50.864(ten thousand yuan).
The reduction of IF steel decarburization terminal activity oxygen content has improved steel quality and the reduction of aluminum shot consumption, saved production cost.
The present invention invents the RH developing and produces IF steel process Decarburization Control model, can be according at the beginning of molten steelBeginning condition, calculates blowing oxygen quantity, adds aluminium amount, carbon dust addition, cooling steel scrap amount and predictionGo out decarburization terminal activity oxygen content etc., RH operating personnel produce in strict accordance with model calculated valueOperation, has realized standardized work.
The IF steel RH vacuum refining decarbonizing process decarburization that adopts this patent to develop on RH vacuum refining furnaceThe calculated value of controlling model instructs production, and model calculated value and actual production measured value connect very muchClosely, RH decarburization model can adapt to actual production requirement completely, and model calculated value and measured valueDegree of conformity is higher, and actual production is had to stronger guiding value. For example:
Magnitude value 1:
Measured value: 1624 DEG C of molten steel RH initial temperatures, the initial C0.049% of molten steel, blowing oxygen quantity 310NM3, cooling adding amount of scrap steel 1000Kg, deoxidation C powder addition 0Kg, decarburization terminal activity oxygen content280％
Decarburization Control model numerical value: 1624 DEG C of molten steel RH initial temperatures, draw the initial phosphorus content of molten steel0.051%, blowing oxygen quantity 335Nm3, cooling adding amount of scrap steel 1275Kg, deoxidation C powder addition 0Kg, decarburization terminal activity oxygen content 320%.
Numerical value 2:
Measured value: 1610 DEG C of molten steel RH initial temperatures, the initial C0.039% of molten steel, blowing oxygen quantity 277NM3, cooling adding amount of scrap steel 0Kg, deoxidation C powder addition 0Kg, decarburization terminal activity oxygen content 310％.
When molten steel RH initial temperature is 1610 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.04%, blowing oxygen quantity 170Nm3, cooling adding amount of scrap steel 0Kg, decarburization terminal activityOxygen content 320%, deoxidation C powder addition 0Kg.
Numerical value 3:
Measured value: 1626 DEG C of molten steel RH initial temperatures, the initial C0.043% of molten steel, blowing oxygen quantity 257NM3, cooling adding amount of scrap steel 1700Kg, deoxidation C powder addition 0Kg, decarburization terminal activity oxygen content272％；
When molten steel RH initial temperature is 1626 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.039%, blowing oxygen quantity 200Nm3, cooling adding amount of scrap steel 1275Kg, decarburization terminalActivity oxygen content 320%, deoxidation C powder addition 0Kg.
Numerical value 4:
Measured value: 1609 DEG C of molten steel RH initial temperatures, the initial C0.042% of molten steel, blowing oxygen quantity 200NM3, cooling adding amount of scrap steel 0Kg, deoxidation C powder addition 0Kg, decarburization terminal activity oxygen content 313％；
When molten steel RH initial temperature is 1609 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.039%, blowing oxygen quantity 185Nm3, cooling adding amount of scrap steel 0Kg, decarburization terminal activityOxygen content 320%, deoxidation C powder addition 0Kg.
Numerical value 5:
Measured value: 1619 DEG C of molten steel RH initial temperatures, the initial C0.032% of molten steel, blowing oxygen quantity 60Nm3, cooling adding amount of scrap steel 0Kg, deoxidation C powder addition 0Kg, decarburization terminal activity oxygen content 334％；
When molten steel RH initial temperature is 1619 while spending, at the beginning of the molten steel that described Decarburization Control model calculatesBeginning phosphorus content 0.03%, blowing oxygen quantity 80Nm3, cooling adding amount of scrap steel 0Kg, decarburization terminal activity oxygenContent 320%,Deoxidation C powder addition 0Kg.
Claims (6)
1. an IF steel RH vacuum decarburization course control method for use, is characterized in that, in vacuumIn decarbonizing process, set up Decarburization Control model, enter according to the parameter of described Decarburization Control model outputRow practical operation, controls vacuum decarburization process;
The parameter of described Decarburization Control model comprises molten steel primary condition, blowing oxygen quantity, temperature adjustment steel scrapAddition, deoxidation carbon dust addition and aluminum shot addition;
Described Decarburization Control model can calculate decarburization automatically according to described molten steel primary conditionBlowing oxygen quantity, cooling adding amount of scrap steel, deoxidation carbon dust addition that process is required, dope decarburizationTerminal activity oxygen content also calculates the required aluminum shot addition of deoxidation and alloying;
If temperature height need add the cooling of temperature adjustment steel scrap; If carbon content is high, the low oxygen decarburization that needs of oxygen content;If when carbon content low oxygen content is high, need to add carbon dust deoxidation;
The foundation of described Decarburization Control model is according to being:
Front carbon content of molten steel Changing Pattern, described decarburization control are processed to RH in statistical analysis Argon stationSimulation calculates RH and processes front molten steel initial carbon content;
Statistical analysis RH processing procedure liquid steel temperature Changing Pattern, described Decarburization Control model is surveyedCalculate as ensureing that processing endpoint molten steel temperature needs the blowing oxygen quantity of chemical heating;
Statistical analysis RH processing procedure temperature changing regularity, described model calculates as guarantee placeThe cooling steel scrap consumption that reason endpoint molten steel temperature need add;
The resistance to material of statistical analysis RH vacuum tank passes oxygen, molten steel initial temperature, initial live in molten steelDegree oxygen and initial carbon content, described Decarburization Control model calculates as ensureing endpoint molten steel carbon contentMeet the requirements and need to force required blowing oxygen quantity or the deoxidation carbon dust addition of decarburization;
Carry out production process control according to model calculated value, improved IF steel oxygen blast hit rate,Effectively reduce IF steel decarburization terminal activity oxygen content, reduced aluminum shot consumption.
2. a kind of IF steel RH vacuum decarburization course control method for use according to claim 1,It is characterized in that, when molten steel RH initial temperature is 1624 while spending, described Decarburization Control model meterThe initial phosphorus content 0.051% of molten steel drawing, blowing oxygen quantity 335Nm3, cooling adding amount of scrap steel1275Kg, deoxidation C powder addition 0Kg.
3. a kind of IF steel RH vacuum decarburization course control method for use according to claim 1,It is characterized in that, when molten steel RH initial temperature is 1610 while spending, described Decarburization Control model meterThe initial phosphorus content 0.04% of molten steel drawing, blowing oxygen quantity 170Nm3, cooling adding amount of scrap steel 0Kg,Deoxidation C powder addition 0Kg.
4. a kind of IF steel RH vacuum decarburization course control method for use according to claim 1,It is characterized in that, when molten steel RH initial temperature is 1626 while spending, described Decarburization Control model meterThe initial phosphorus content 0.039% of molten steel drawing, blowing oxygen quantity 200Nm3, cooling adding amount of scrap steel1275Kg, deoxidation C powder addition 0Kg.
5. a kind of IF steel RH vacuum decarburization course control method for use according to claim 1,It is characterized in that, when molten steel RH initial temperature is 1609 while spending, described Decarburization Control model meterThe initial phosphorus content 0.039% of molten steel drawing, blowing oxygen quantity 185Nm3, cooling adding amount of scrap steel0Kg, deoxidation C powder addition 0Kg.
6. a kind of IF steel RH vacuum decarburization course control method for use according to claim 1,It is characterized in that, when molten steel RH initial temperature is 1619 while spending, described Decarburization Control model meterThe initial phosphorus content 0.03% of molten steel drawing, blowing oxygen quantity 80Nm3, cooling adding amount of scrap steel 0Kg,Deoxidation C powder addition 0Kg.
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| CN105603158B (en) * | 2016-03-10 | 2017-09-01 | 河北钢铁股份有限公司邯郸分公司 | A kind of method for controlling ultra-low carbon baking hardening steel dissolved carbon content |
| CN108060289B (en) * | 2017-12-12 | 2019-08-30 | 马鞍山钢铁股份有限公司 | A kind of temperature-compensating refinery practice of RH refining furnace production IF steel |
| CN110684883A (en) * | 2019-11-18 | 2020-01-14 | 马鞍山钢铁股份有限公司 | Steelmaking method for reducing tapping temperature of vacuum decarburization steel converter |
| CN114085955A (en) * | 2021-10-19 | 2022-02-25 | 首钢集团有限公司 | Method, device, equipment and medium for monitoring carbon content in vacuum decarburization process |
| CN115572793B (en) * | 2022-11-09 | 2024-01-26 | 马鞍山钢铁股份有限公司 | RH smelting method and system for low-carbon aluminum killed steel |
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