CN109777923A - A kind of RH refined alloy addition control method - Google Patents
A kind of RH refined alloy addition control method Download PDFInfo
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- CN109777923A CN109777923A CN201910148692.7A CN201910148692A CN109777923A CN 109777923 A CN109777923 A CN 109777923A CN 201910148692 A CN201910148692 A CN 201910148692A CN 109777923 A CN109777923 A CN 109777923A
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Abstract
The invention belongs to technical field of ferrous metallurgy more particularly to a kind of RH refined alloy, and control method is added.This method comprises: predicting finishing blowing molten steel composition after converter smelting tapping；According to the finishing blowing molten steel composition predicted, in conjunction with converter tapping process alloy addition, prediction tapping terminates molten steel composition；Terminate molten steel composition according to the tapping of prediction, prepares the alloy of approrpiate wts；It, will be in the ladle refining molten steel of ready approrpiate wts in RH refining.The present invention can significantly shorten RH refining process smelting cycle, and reduce sampling and the chemical examination number of smelting process, increase economic efficiency.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy more particularly to a kind of RH refined alloy, and control method is added.
Background technique
Converter-refining-continuous casting is three master operations in steelmaking process, converter, refining by the molten steel of ingredient qualification send to
Continuous casting, wherein based on coarse adjustment ingredient, refining is precisely controlled based on ingredient converter link with accurate adjustment, is added and is closed by control
Gold type and quantity, come meet steel quality, kind and performance requirement.
In the implementation of the present invention, it is found by the applicant that in the prior art the prior art has at least the following problems:
In existing Ferrous Metallurgy technical process, the foundation of alloy addition is entered the station with RH refining when RH refines adjusting component
Subject to the result of sample examination, is quoted from sampling, sample treatment, transmission, reception, cutting, chemical examination to ingredient and need used time about 7-
10min waits the long sampling simultaneously of samples time to need using sampling probe, the geomantic omen energy or the material such as electrically, not such as sample to quoting
Qualified waiting time, the required energy or material are more, at high cost, influence RH refining efficiency.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of RH refined alloys, and control method is added, to mention
High RH refining efficiency.
The present invention through the following technical solutions to achieve the above objectives:
A kind of RH refined alloy addition control method, which comprises
S1: after converter smelting tapping, finishing blowing molten steel composition is predicted；
S2: according to the finishing blowing molten steel composition predicted, in conjunction with converter tapping process alloy addition, prediction tapping
Terminate molten steel composition, specifically include:
Weighing up tapping terminates Metal Weight, is denoted as Wsteel1, unit t；
On the basis of tapping end Metal Weight, pass through formula 1) obtain finishing blowing Metal Weight, the formula
1) are as follows:
Wherein: Wsteel0For finishing blowing Metal Weight, t；WAiFor i alloy addition, t in converter；αiIt is closed for i in converter
Golden entirety recovery rate, %；
On the basis of tapping end Metal Weight and the finishing blowing Metal Weight, pass through formula 2) it obtains out
Steel terminates molten steel composition, the formula 2) are as follows:
Wherein: XkFor the content of k element in molten steel after adduction gold, %；For k element contains in molten steel before adduction gold
Amount, %； WAiFor i alloy addition, t；αiFor i alloy entirety recovery rate, %；XAi,kFor the content of k element in i alloy, %；
βkFor k element recovery rate, % in i alloy；
S3: molten steel composition is terminated according to the tapping of prediction, prepares the alloy of approrpiate wts；
S4:, will be in the ladle refining molten steel of ready approrpiate wts in RH refining.
Further, the finishing blowing molten steel composition that predicts includes:
There is the heat for bessemerizing and terminating sampling and thering is result of laboratory test to return, using the result of laboratory test of the sampling as this heat
Smelting finishing blowing ingredient；
Without end sampling or heat of the result of laboratory test without return is bessemerized, finishing blowing molten steel composition is obtained by calculating
?.
Further, nothing bessemerizes end sampling or heat of the result of laboratory test without return, finishing blowing molten steel composition
It is specifically included by calculating:
Using finishing blowing sublance measurement carbon content as finishing blowing carbon content, it is denoted as [%C]0, %；
Finishing blowing silicone content [%Si]0It is denoted as 0.01%；
Finishing blowing manganese content predicts [%Mn]0=[%Mn]hm× 0.18+0.35 × [%C]0, wherein [%Mn]hmTo enter
Furnace molten iron manganese content, %, [%C]0Carbon, %, [%Mn] are measured for TSO sublance0Unit %；
Finishing blowing phosphorus content predicts [%P]0=([%P]hm× 49.1- [%C]TSC×0.51+TTSC× 0.016- [%
C]0×2.92+TTSO× 0.07-134.8)/100, wherein [%P]hmFor molten iron phosphorus content, unit %, [%C]TSCFor TSC sublance
Measure carbon content, unit %, TTSCTemperature, unit DEG C, [%C] are measured for TSC sublance0Carbon content, list are measured for TSO sublance
Position %, TTSOTemperature, unit DEG C, [%P] are measured for TSO sublance0Unit %；
Finishing blowing sulfur content predicts [%S]0=[%S]hm× 0.6, [%S]hmFor molten steel sulfur content, unit %, [%
S]0Unit %；
Remaining oxidizable elemental composition is denoted as 0, is not easy oxidizing elemental and is denoted as molten iron content.
Further, described to terminate molten steel composition according to the tapping of prediction, the alloy for preparing approrpiate wts specifically includes:
The tapping of prediction, which is terminated molten steel composition and tapping, to be terminated Metal Weight and is stored in converter database in real time；
RH database terminates molten steel composition and goes out every N seconds reading converter database datas, the tapping for reading newest prediction
Steel terminates Metal Weight, and terminates molten steel composition and tapping end Metal Weight according to the tapping of newest prediction, calculates and prepares
Alloy amount to be put into.
Preferably, the N is 5~10.
Further, it in RH refining, will be specifically included in the ladle refining molten steel of ready approrpiate wts:
After RH molten steel enters the station, direct vacuumize process；
Vacuumize T after starting1Minute, it will be in the alloy vacuum cavity to the utmost that approrpiate wts be prepared；
Vacuumize T2Determine oxygen after minute, require tune aluminium according to oxygen result and molten steel aluminium content is determined；
After RH tune aluminium receives, alloy is put into vacuum chamber molten steel by vacuum cavity.
Preferably, the T1It is 1~3.
Preferably, the T2It is 4~6.
The beneficial effects of the present invention are:
Control method is added in a kind of RH refined alloy of the invention, terminates Metal Weight and blowing knot due to being to tap
On the basis of beam Metal Weight, the weight alloy for terminating molten steel composition by the way that tapping is calculated, and then preparing required for obtaining,
To enter the station molten steel without sampling in RH, it can significantly shorten RH refining process smelting cycle, and reduce the sampling of smelting process
And chemical examination number, it increases economic efficiency.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is that the flow diagram of control method is added in a kind of RH refined alloy of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is that the flow diagram of control method is added in a kind of RH refined alloy of the embodiment of the present invention, in conjunction with Fig. 1, originally
Control method is added in the RH refined alloy of inventive embodiments
S1: after converter smelting tapping, finishing blowing molten steel composition is predicted；
S2: according to the finishing blowing molten steel composition predicted, in conjunction with converter tapping process alloy addition, prediction tapping
Terminate molten steel composition；
S3: molten steel composition is terminated according to the tapping of prediction, prepares the alloy of approrpiate wts；
S4:, will be in the ladle refining molten steel of ready approrpiate wts in RH refining.
Control method is added in a kind of RH refined alloy of the embodiment of the present invention, due to being with tap terminate Metal Weight and
On the basis of finishing blowing Metal Weight, predicting tapping terminates molten steel composition, and then the weight alloy prepared required for obtaining,
To enter the station molten steel without sampling in RH, it can significantly shorten RH refining process smelting cycle, and reduce the sampling of smelting process
And chemical examination number, it increases economic efficiency.
Further, the S1 of the embodiment of the present invention is specifically included:
There is the heat for bessemerizing and terminating sampling and thering is result of laboratory test to return, using the result of laboratory test of the sampling as this heat
Smelting finishing blowing ingredient；
Without end sampling or heat of the result of laboratory test without return is bessemerized, finishing blowing molten steel composition is obtained by calculating
?.
Further, it in the embodiment of the present invention, without end sampling or heat of the result of laboratory test without return is bessemerized, blows
Refining terminates molten steel composition and is specifically included by calculating:
Using finishing blowing sublance measurement carbon content as finishing blowing carbon content, it is denoted as [%C]0, %；
Finishing blowing silicone content [%Si]0It is denoted as 0.01%；
Finishing blowing manganese content predicts [%Mn]0=[%Mn]hm× 0.18+0.35 × [%C]0, wherein [%Mn]hmTo enter
Furnace molten iron manganese content, %, [%C]0Carbon, %, [%Mn] are measured for TSO sublance0Unit %；
Finishing blowing phosphorus content predicts [%P]0=([%P]hm× 49.1- [%C]TSC×0.51+TTSC× 0.016- [%
C]0×2.92+TTSO× 0.07-134.8)/100, wherein [%P]hmFor molten iron phosphorus content, unit %, [%C]TSCFor TSC sublance
Measure carbon content, unit %, TTSCTemperature, unit DEG C, [%C] are measured for TSC sublance0Carbon content, list are measured for TSO sublance
Position %, TTSOTemperature, unit DEG C, [%P] are measured for TSO sublance0Unit %；
Finishing blowing sulfur content predicts [%S]0=[%S]hm× 0.6, [%S]hmFor molten steel sulfur content, unit %, [%
S]0Unit %；
Remaining oxidizable elemental composition is denoted as 0, is not easy oxidizing elemental and is denoted as molten iron content.
In the embodiment of the present invention, S2 is specifically included:
Weighing up tapping terminates Metal Weight, is denoted as Wsteel1, unit t, it is by a scale that tapping, which terminates molten steel, in this step
Actually read out；
On the basis of tapping end Metal Weight, pass through formula 1) obtain finishing blowing Metal Weight, formula 1) are as follows:
Wherein: Wsteel0For finishing blowing Metal Weight, t；WAiFor i alloy addition, t in converter；αiIt is closed for i in converter
Golden entirety recovery rate, %；
On the basis of tapping end Metal Weight and finishing blowing Metal Weight, pass through formula 2) show that tapping terminates steel
Water constituent, formula 2) are as follows:
Wherein: XkFor the content of k element in molten steel after adduction gold, %；For k element contains in molten steel before adduction gold
Amount, %； WAiFor i alloy addition, t；αiFor i alloy entirety recovery rate, %；XAi,kFor the content of k element in i alloy, %；
βkFor k element recovery rate, % in i alloy.
In above-mentioned S3, i alloy addition is delivered in converter by conveyor belt in converter, during transportation can
It is lossy, αiI alloy entirety recovery rate in converter as after removal loss.
Further, the S3 of the embodiment of the present invention, which is specifically included, terminates molten steel composition and tapping end steel for the tapping of prediction
Water weight is stored in real time in converter database；
RH database terminates molten steel composition and goes out every N seconds reading converter database datas, the tapping for reading newest prediction
Steel terminates Metal Weight, and terminates molten steel composition and tapping end Metal Weight according to the tapping of newest prediction, calculates and prepares
Alloy amount to be put into, i.e., according to the tapping of newest prediction terminate molten steel composition and tapping terminate Metal Weight product, obtain to
The alloy amount of investment.
Preferably, the N in the embodiment of the present invention can be 5~10.
Further, the S4 of the embodiment of the present invention is specifically included:
After RH molten steel enters the station, direct vacuumize process；
Vacuumize T after starting1Minute, it will be in the alloy vacuum cavity to the utmost that approrpiate wts be prepared；
Vacuumize T2Determine oxygen after minute, require tune aluminium according to oxygen result and molten steel aluminium content is determined；
After RH tune aluminium receives, alloy is put into vacuum chamber molten steel by vacuum cavity.
The T of the embodiment of the present invention1It can be 1~3, and T2It can be 4~6.
This have the advantage that:
1, concatenated converter, refining procedure are established ingredient prediction model by the embodiment of the present invention respectively, realize that two-step is handed over
The ingredient prediction and transmitting for connecing molten steel utilize, and converter refines shared ingredient prediction result of building together；
2, after fully considering Converter, the RH molten steel that enters the station do not have to sampling, add according to converter tapping prediction ingredient as alloy
Enter the calculating benchmark of amount, RH carry out it is standby, cater to gold, 3, can significantly shorten RH refining process smelting cycle, reduce temperature losses of the process,
Sampling and the chemical examination number that smelting process can correspondingly be reduced, reduce sampler, sample treatment, chemical examination cost, improve economical
Benefit.
Concrete application:
1,225 tons of Metal Weight are measured after converter tapping, does not take and bessemerizes terminal sample, and it is main that terminal is bessemerized in prediction
Constituent content is respectively [%C]0=0.032%, [%Si]0=0.01%, [%Mn]0=0.046%, [%P]0=
0.0145%, [%S]0=0.0039%；
2, converter tapping process does not concoct gold, to bessemerize closure component as tapping prediction ingredient；
3, RH database by database communication every 5 seconds reading converter database datas, read newest prediction result and
Tapping weighs Metal Weight storage and enters RH database；
4, it after RH molten steel enters the station, vacuumizes and does not get station sample；
5, steel grade target manganese content 0.22% vacuumizes after beginning 1 minute, calculates high carbon ferromanganese according to converter prediction result
557kg, alloy it is standby enter vacuum cavity；
6, tune aluminium is carried out within 4-6 minutes after vacuumizing beginning；
7, alloy is put into vacuum chamber by vacuum cavity after tune aluminium.
It is 0.224% smelting end sample examination manganese content, it is known that met the requirements by the alloy amount of above-mentioned addition.
Embodiment provided above is better embodiment of the invention, only is used to facilitate to illustrate the present invention, not to this hair
It is bright to make any form of restriction, have usually intellectual in any technical field, if not departing from the proposed skill of the present invention
In the range of art feature, using the equivalent embodiment for locally changing or modifying made by disclosed technology contents, and
Without departing from technical feature content of the invention, in the range of still falling within the technology of the present invention feature.
Claims (8)
1. control method is added in a kind of RH refined alloy, which is characterized in that the described method includes:
S1: after converter smelting tapping, finishing blowing molten steel composition is predicted；
S2: according to the finishing blowing molten steel composition predicted, in conjunction with converter tapping process alloy addition, prediction tapping terminates
Molten steel composition specifically includes:
Weighing up tapping terminates Metal Weight, is denoted as Wsteel1, unit t；
On the basis of tapping end Metal Weight, pass through formula 1) obtain finishing blowing Metal Weight, the formula 1) are as follows:
Wherein: Wsteel0For finishing blowing Metal Weight, t；WAiFor i alloy addition, t in converter；αiIt is whole for i alloy in converter
Body recovery rate, %；
On the basis of tapping end Metal Weight and the finishing blowing Metal Weight, pass through formula 2) obtain tapping knot
Beam molten steel composition, the formula 2) are as follows:
Wherein: XkFor the content of k element in molten steel after adduction gold, %；For the content of k element in molten steel before adduction gold, %；
WAiFor i alloy addition, t；αiFor i alloy entirety recovery rate, %；XAi,kFor the content of k element in i alloy, %；βkFor i conjunction
K element recovery rate, % in gold；
S3: molten steel composition is terminated according to the tapping of prediction, prepares the alloy of approrpiate wts；
S4:, will be in the ladle refining molten steel of ready approrpiate wts in RH refining.
2. control method is added in a kind of RH refined alloy according to claim 1, which is characterized in that described to predict blowing
Terminating molten steel composition includes:
There is the heat for bessemerizing and terminating sampling and thering is result of laboratory test to return, using the result of laboratory test of the sampling as the smelting of this heat
Refine finishing blowing ingredient；
Without end sampling or heat of the result of laboratory test without return is bessemerized, finishing blowing molten steel composition is obtained by calculating.
3. control method is added in a kind of RH refined alloy according to claim 2, which is characterized in that nothing bessemerizes end
Sampling or heat of the result of laboratory test without return, finishing blowing molten steel composition are specifically included by calculating:
Using finishing blowing sublance measurement carbon content as finishing blowing carbon content, it is denoted as [%C]0, %；
Finishing blowing silicone content [%Si]0It is denoted as 0.01%；
Finishing blowing manganese content predicts [%Mn]0=[%Mn]hm× 0.18+0.35 × [%C]0, wherein [%Mn]hmTo enter furnace iron
Water manganese content, %, [%C]0Carbon, %, [%Mn] are measured for TSO sublance0Unit %；
Finishing blowing phosphorus content predicts [%P]0=([%P]hm× 49.1- [%C]TSC×0.51+TTSC× 0.016- [%C]0×
2.92+TTSO× 0.07-134.8)/100, wherein [%P]hmFor molten iron phosphorus content, unit %, [%C]TSCFor the measurement of TSC sublance
Carbon content, unit %, TTSCTemperature, unit DEG C, [%C] are measured for TSC sublance0Carbon content, unit % are measured for TSO sublance,
TTSOTemperature, unit DEG C, [%P] are measured for TSO sublance0Unit %；
Finishing blowing sulfur content predicts [%S]0=[%S]hm× 0.6, [%S]hmFor molten steel sulfur content, unit %, [%S]0It is single
Position %；
Remaining oxidizable elemental composition is denoted as 0, is not easy oxidizing elemental and is denoted as molten iron content.
4. control method is added in a kind of RH refined alloy according to claim 1, which is characterized in that described according to prediction
Tapping terminates molten steel composition, and the alloy for preparing approrpiate wts specifically includes:
The tapping of prediction, which is terminated molten steel composition and tapping, to be terminated Metal Weight and is stored in converter database in real time；
RH database terminates molten steel composition and tapping knot every N seconds reading converter database datas, the tapping for reading newest prediction
Beam Metal Weight, and molten steel composition and tapping end Metal Weight are terminated according to the tapping of newest prediction, it calculates and prepares wait throw
The alloy amount entered.
5. control method is added in a kind of RH refined alloy according to claim 4, which is characterized in that the N is 5~10.
6. control method is added in a kind of RH refined alloy according to claim 4, which is characterized in that, will in RH refining
It is specifically included in the ladle refining molten steel of ready approrpiate wts:
After RH molten steel enters the station, direct vacuumize process；
Vacuumize T after starting1Minute, it will be in the alloy vacuum cavity to the utmost that approrpiate wts be prepared；
Vacuumize T2Determine oxygen after minute, require tune aluminium according to oxygen result and molten steel aluminium content is determined；
After RH tune aluminium receives, alloy is put into vacuum chamber molten steel by vacuum cavity.
7. control method is added in a kind of RH refined alloy according to claim 6, which is characterized in that the T1It is 1~3.
8. control method is added in a kind of RH refined alloy according to claim 6, which is characterized in that the T2It is 4~6.
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| CN112094988A (en) * | 2020-09-08 | 2020-12-18 | 北京首钢自动化信息技术有限公司 | RH refining furnace charge control method |
| CN112662841A (en) * | 2020-11-20 | 2021-04-16 | 首钢京唐钢铁联合有限责任公司 | CAS-OB refining automatic alloying control method and system |
| CN113805537A (en) * | 2020-06-16 | 2021-12-17 | 上海梅山钢铁股份有限公司 | Smelting alloy component control system and control method |
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