CN116393661A - Method and device for determining steel feeding temperature - Google Patents
Method and device for determining steel feeding temperature Download PDFInfo
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- CN116393661A CN116393661A CN202310664468.XA CN202310664468A CN116393661A CN 116393661 A CN116393661 A CN 116393661A CN 202310664468 A CN202310664468 A CN 202310664468A CN 116393661 A CN116393661 A CN 116393661A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 215
- 239000010959 steel Substances 0.000 title claims abstract description 215
- 238000000034 method Methods 0.000 title claims abstract description 88
- 238000007670 refining Methods 0.000 claims abstract description 119
- 238000005266 casting Methods 0.000 claims abstract description 78
- 230000008569 process Effects 0.000 claims abstract description 44
- 230000007306 turnover Effects 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims description 39
- 230000000694 effects Effects 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 230000008439 repair process Effects 0.000 claims description 6
- 230000002596 correlated effect Effects 0.000 claims description 5
- 239000002436 steel type Substances 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 abstract description 6
- 238000009749 continuous casting Methods 0.000 description 9
- 230000017525 heat dissipation Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 2
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
- B22D2/006—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the temperature of the molten metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
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Abstract
The invention discloses a method and a device for determining the steel feeding temperature, which are applied to the steel smelting industry and comprise the steps of determining the steel feeding temperature of the nth refining of a ladle, wherein n is an integer not less than 1; determining a temperature influence factor on the temperature in the ladle turnover process and a temperature influence by the influence factor, wherein the influence factor comprises one or a combination of more of the power-on amount in the refining process, the temperature drop in the casting process and the blank running time; and determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors. In the ladle turnover process, factors influencing the temperature exist, the influencing factors and the temperature values influenced by the influencing factors are determined, the steel feeding temperature of the next time is determined by the steel feeding refining temperature of the nth time and the temperature values influenced by the influencing factors, and the obtained steel feeding refining temperature is determined to be more accurate.
Description
Technical Field
The invention relates to the field of steel smelting, in particular to a method and a device for determining the steel feeding temperature.
Background
The temperature of molten steel on refining is gradually reduced in the process from the outlet of refining to the completion of casting by a continuous casting machine, and is mainly related to the heat dissipation of a ladle in the running and casting processes, and one cycle of receiving molten steel from a converter, refining smelting, casting by the continuous casting machine, blank operation of the ladle, and receiving molten steel from the converter. The steel feeding temperature of the continuous casting machine directly affects the stability of the casting temperature of molten steel, and is an important technical index for affecting the production and quality control of the continuous casting machine. The accurate control of the casting temperature can improve the uniform growth of the solidified shell of molten steel in the crystallizer, is beneficial to the expansion of the equiaxial crystal proportion, has better metallurgical effects on the external surface quality and internal structure of a casting blank, and is beneficial to the production stability of the long casting state of a continuous casting machine.
The determination of the tapping temperature for continuous casting machines is a very important problem for steel smelting.
Disclosure of Invention
The invention aims to provide a method and a device for determining the steel feeding temperature, which are used for determining influencing factors and temperature values influenced by the influencing factors, determining the steel feeding temperature of the next time by the refining steel feeding temperature of the nth time and the temperature values influenced by the influencing factors, and determining the obtained refining steel feeding temperature more accurately.
In order to solve the technical problems, the invention provides a method for determining the steel feeding temperature, which comprises the following steps:
determining the temperature of steel on the nth refining of the ladle, wherein n is an integer not less than 1;
determining influencing factors on temperature in the ladle turnover process and the temperature influenced by the influencing factors, wherein the influencing factors comprise one or more of the combination of the power-on amount of the refining process, the temperature drop of the casting process and the blank running time;
and determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors.
On the other hand, before determining the temperature of the (n+1) th refined steel of the ladle according to the temperature of the n-th refined steel and the temperature influenced by the influencing factors, the method further comprises:
determining a production mode of the steel ladle, wherein the production mode comprises one of special line production of single steel grade, non-special line production and special line production of replacement steel grade;
determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors, wherein the method comprises the following steps:
and determining the temperature of the steel on the n+1th refining of the ladle according to the production mode of the ladle, the temperature of the steel on the n refining and the temperature influenced by the influencing factors.
On the other hand, when the production mode of the ladle is special line production of single steel grade, determining the temperature of the (n+1) th refining steel of the ladle according to the temperature of the n refining steel and the temperature influenced by the influencing factors comprises:
according to the first temperature relation T n+1 = T n +X D +Y △T +Z T-shaped hollow Determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors;
wherein T is n+1 T is the temperature of the steel on the n+1th refining of the ladle n X is the temperature of steel on the nth refining of the ladle D To influence the energization amount of the refining process on the temperature of the steel on the refining, Y △T Z is the influence of the temperature drop of the casting process on the temperature of the refined steel T-shaped hollow The influence of the run time of the blank on the temperature of the refined steel.
On the other hand, when the production mode of the ladle is non-specialized production or specialized production for replacing steel grades, determining the temperature of the (n+1) th refining steel of the ladle according to the temperature of the n refining steel and the temperature influenced by the influencing factors comprises:
according to the second temperature relation T n+1 =T Outbound station +X D +Y △T +Z T-shaped hollow Determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors;
wherein X is D To influence the energization amount of the refining process on the temperature of the steel on the refining, Y △T Z is the influence of the temperature drop of the casting process on the temperature of the refined steel T-shaped hollow T is the influence of the blank running time on the temperature of the refined steel Outbound station =T Liquid and its preparation method +T Degree of superheat +T Procedure ，T Outbound station T is the outlet temperature of the ladle Liquid and its preparation method For liquidus temperature, T of steel type of molten steel contained in the ladle Procedure Positively correlated with the time of the ladle casting process, T Degree of superheat Is associated with the steel grade.
In another aspect, determining a temperature of an influence of an amount of power applied to the refining process during ladle turnaround includes:
when the power-on quantity is not larger than the preset power quantity, determining that the temperature influenced by the power-on quantity is 0;
when the energizing quantity is larger than the preset electric quantity, according to a third temperature relation X D =the preset charge-on charge, determining a temperature affected by the on charge;
wherein X is D The effect of the amount of electrical energy to the refining process on the temperature of the steel being refined.
In another aspect, determining a temperature of the casting process affected by a temperature drop during ladle turnaround includes:
when the temperature drop in the actual casting process is smaller than the standard temperature drop, determining that the temperature influenced by the temperature drop in the casting process is 0;
when the temperature drop in the actual casting process is not less than the standard temperature drop, according to a fourth temperature relation Y △T =（△ Tactual -△ T mark ) F, determining the steel ladle circumferenceThe temperature affected by the temperature drop in the casting process in the process of rotation;
wherein Y is △T Delta is the effect of the temperature drop of the casting process on the temperature of the refined steel Tactual Delta for the temperature drop of the actual casting process T mark And f is an influence coefficient, and the actual casting temperature drop and the standard casting temperature drop are positively correlated with the time of the casting process.
In another aspect, determining a temperature that affects a blank pack operation time during a ladle turnaround includes:
when the actual blank running time is smaller than the standard blank running time, determining that the temperature influenced by the blank running time is 0;
when the actual blank operation time is not less than the standard blank operation time, according to a fifth temperature relation Z T-shaped hollow =T Empty space -T Mark and space Determining the temperature influenced by the running time of the blank ladle in the ladle turnover process;
wherein T is Empty space For the actual empty packet run time, T Mark and space Is the standard run time of the empty packet.
On the other hand, after determining the influencing factors on the temperature and the temperature influenced by the influencing factors in the ladle turnover process, the method further comprises the following steps:
and when the temperature influenced by the temperature drop in the casting process and the temperature influenced by the empty ladle operation time are both 0, recording the temperature influenced by the electrifying amount in the refining process as 0.
On the other hand, after determining the temperature of the (n+1) th refined steel of the ladle according to the temperature of the n-th refined steel and the temperature influenced by the influencing factors, the method further comprises:
when the temperature drop in the actual casting process is smaller than the standard temperature drop, judging whether the temperature of the steel on the n+1st refining is larger than the highest value of the superheat range;
if it exceeds, it is based on the correction relation T n repair =T n+1 -（T Degree of superheat max - T Target superheat degree max ) Correcting the temperature of the steel on the n+1th refining;
wherein T is n repair T for correcting the temperature of steel on the nth refining n+1 T is the temperature of the steel on the n+1th refining Degree of superheat max T is the maximum value of the superheat degree Target superheat degree max Is the highest value of the standard superheat range.
In order to solve the technical problem, the invention also provides a device for determining the steel feeding temperature, which comprises the following steps:
a memory for storing a computer program;
and the processor is used for realizing the steps of the method for determining the steel feeding temperature when executing the computer program.
The invention provides a method and a device for determining the steel feeding temperature, which are applied to the steel smelting industry and comprise the steps of determining the steel feeding temperature of the nth refining of a ladle, wherein n is an integer not less than 1; determining a temperature influence factor on the temperature in the ladle turnover process and a temperature influence by the influence factor, wherein the influence factor comprises one or a combination of more of the power-on amount in the refining process, the temperature drop in the casting process and the blank running time; and determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors. In the ladle turnover process, factors influencing the temperature exist, the influencing factors and the temperature values influenced by the influencing factors are determined, the steel feeding temperature of the next time is determined by the steel feeding refining temperature of the nth time and the temperature values influenced by the influencing factors, and the obtained steel feeding refining temperature is determined to be more accurate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for determining the temperature of steel feeding provided by the invention;
fig. 2 is a schematic structural diagram of a device for determining the temperature of steel feeding provided by the invention.
Detailed Description
The core of the invention is to provide a method and a device for determining the steel feeding temperature, which are used for determining influencing factors and temperature values influenced by the influencing factors, determining the steel feeding temperature of the next time by the nth refined steel feeding temperature and the temperature values influenced by the influencing factors, and determining the obtained refined steel feeding temperature more accurately.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a flowchart of a method for determining a steel feeding temperature, which includes:
s11: determining the temperature of steel on the nth refining of the ladle, wherein n is an integer not less than 1;
s12: determining the influence factors of the ladle on the temperature in the turnover process and the temperature influenced by the influence factors, wherein the influence factors comprise one or more of the combination of the power-on amount in the refining process, the temperature drop in the casting process and the blank running time;
s13: and determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors.
The temperature of molten steel refining steel is gradually reduced from the refining outlet to the casting completion of a continuous casting machine, the heat dissipation of a ladle in the operation and casting processes is mainly related, factors related to the heat dissipation of the ladle in the ladle circulation flow mainly comprise refining power-on quantity, blank ladle operation condition and the last actual casting heat dissipation condition of the ladle, the refining power-on quantity is favorable for heat absorption of ladle refractory materials, the blank ladle operation process ladle refractory materials are greatly dissipated, and the heat dissipation condition in the ladle turnover process can be represented by the actual casting temperature drop. Therefore, when the temperature of the steel on the n+1th refining is calculated, the temperature of the steel on the n refining of the ladle and the heat dissipation and heat absorption conditions generated in the casting process are required to be determined.
Considering that the influence of the influence factors on the temperature is different, the influence of each influence factor on the temperature is required to be determined, and then the steel feeding temperature can be determined more accurately.
It is also to be noted that the steel ladle operation flow adopts capping and heat preservation agent to preserve heat, and the steel ladle is put into operation without baking.
The invention provides a method for determining the steel feeding temperature, which is applied to the steel smelting industry and comprises the steps of determining the steel feeding temperature of the nth refining of a ladle, wherein n is an integer not less than 1; determining a temperature influence factor on the temperature in the ladle turnover process and a temperature influence by the influence factor, wherein the influence factor comprises one or a combination of more of the power-on amount in the refining process, the temperature drop in the casting process and the blank running time; and determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors. In the refining process, factors influencing the temperature exist, the influencing factors and the temperature values influenced by the influencing factors are determined, the steel feeding temperature of the next time is determined by the steel feeding temperature of the nth time refining and the temperature values influenced by the influencing factors, and the obtained steel feeding temperature of the refining is determined more accurately.
Based on the above embodiments:
in some embodiments, before determining the temperature of the n+1th refined steel of the ladle according to the temperature of the n-th refined steel and the temperature affected by the influencing factors, the method further comprises:
determining a production mode of the steel ladle, wherein the production mode comprises one of special line production of a single steel grade, non-special line production and special line production of replacement steel grade;
determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by influencing factors, wherein the method comprises the following steps:
and determining the temperature of the steel on the n+1th refining of the ladle according to the production mode of the ladle and the temperature of the steel on the n refining and the temperature influenced by influencing factors.
The special line production of the steel ladle is special for 1 continuous casting machine steel ladle, and the non-special line production of the steel ladle is mixed use of a plurality of continuous casting machine steel ladles. The method for calculating the steel feeding temperature is different due to different production modes, and the steel feeding temperature of the steel ladle in the n+1th refining is determined according to the production mode, the steel feeding temperature of the nth refining and the temperature influenced by influencing factors when the steel feeding temperature is calculated.
In some embodiments, when the production mode of the ladle is dedicated line production of a single steel grade, determining the temperature of the n+1th refined steel of the ladle according to the temperature of the n refined steel and the temperature affected by the influencing factors comprises:
according to the first temperature relation T n+1 = T n +X D +Y △T +Z T-shaped hollow Determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by influencing factors;
wherein T is n+1 T is the temperature of the steel on the n+1th refining n X is the temperature of steel on the nth refining D To influence the energization amount of the refining process on the temperature of the refined steel, Y △T Z is the influence of temperature drop in casting process on the temperature of refined steel T-shaped hollow Is the effect of the run time of the blank on the temperature of the refined steel.
It can be understood that when single steel grade is produced in a special line, the steel feeding temperature of the (n+1) th ladle is equal to the sum of the steel feeding temperature of the (n) th ladle and the temperature influenced by each influencing factor. And adding the temperature influenced by all influencing factors and the temperature of the nth refined steel to obtain the temperature of the (n+1) th refined steel.
In some embodiments, when the production mode of the ladle is non-dedicated production or dedicated production for replacing steel grades, determining the temperature of the (n+1) th refined steel of the ladle according to the temperature of the n-th refined steel and the temperature affected by the influencing factors comprises:
according to the second temperature relation T n+1 =T Outbound station +X D +Y △T +Z T-shaped hollow Determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by influencing factors;
wherein X is D To influence the energization amount of the refining process on the temperature of the refined steel, Y △T Z is the influence of temperature drop in casting process on the temperature of refined steel T-shaped hollow T is the influence of the running time of the blank on the temperature of the refined steel Outbound station =T Liquid and its preparation method +T Degree of superheat +T Procedure ，T Outbound station Is the outlet temperature of the ladle, T Liquid and its preparation method Liquidus temperature, T of steel type of steel ladle Procedure Is positively related to the time of the ladle casting process, T Degree of superheat In relation to the steel grade.
It is understood that when different steel grades are produced in a non-dedicated line or in a dedicated line, the steel feeding temperature of the (n+1) th ladle is equal to the sum of the refining outlet temperature of the (n) th ladle and the temperature affected by each influencing factor. The refining outlet of the nth ladle is the temperature summation of the ladle temperature, the change of the refining process temperature and the temperature affected by the superheat degree.
Specifically T Degree of superheat In relation to the steel grade, non-alloyed structural steel: 15 ℃, aluminum killed steel: 20 ℃, high carbon/low alloy steel: 13 ℃.
In some embodiments, determining a temperature of an influence of an energization amount of a refining process during ladle turnaround includes:
when the power-on quantity is not more than the preset power quantity, determining that the temperature influenced by the power-on quantity is 0;
when the electrified quantity is larger than the preset electric quantity, according to a third temperature relation X D =preset power-on power, determining the temperature affected by the power-on power;
wherein X is D The effect of the amount of electrical energy applied to the refining process on the temperature of the steel being refined.
The electrified quantity increases the heat absorption expansion of the steel ladle refractory material, and the characteristic of the temperature drop of molten steel becomes small in the casting process forms quantitative correlation. The temperature is not affected when the energization amount is not greater than the preset electric amount, and the temperature affected when the energization amount is greater than the preset electric amount is the preset electric amount-energization amount.
For convenience of conversion, X is set to 2500kw.h when the preset electric quantity D ℃=(2500kw.h-Dkw.h)/2000。
In some embodiments, determining a temperature of a temperature drop effect of a casting process during ladle turnaround includes:
when the temperature drop in the actual casting process is smaller than the standard temperature drop, determining that the temperature affected by the temperature drop in the casting process is 0;
when the temperature drop in the actual casting process is not less than the standard temperature drop, according to the fourth temperature relation Y △T =（△ Tactual -△ T mark ) F, determining the temperature influenced by temperature drop in the casting process in the ladle turnover process;
wherein Y is △T Delta for the effect of temperature drop during casting on the temperature of the refined steel Tactual For temperature drop in actual casting process T mark The standard casting temperature drop is f is an influence coefficient, and the actual casting temperature drop and the standard casting temperature drop are positively correlated with the time of the casting process.
The casting time is prolonged, the temperature drop of molten steel is increased, and standard temperature drop values are established according to different casting periods. The temperature is understood to be unaffected when the temperature drop in the actual casting process is less than the standard casting temperature drop, and the temperature affected when the temperature drop in the actual casting process is not less than the standard casting temperature drop is the difference between the temperature drop in the actual casting process and the standard temperature drop multiplied by the influence coefficient f.
Specifically, the influence coefficient f is related to the casting time, and the casting time is 35 minutes and 50 minutes as the divided regions.
F takes 0.8 delta when the casting time is less than 35 minutes T mark ℃=5℃，Y △T ℃=（△T Actual practice is that of ℃-△T Label (C) ）*0.8；
F is 1.2 and delta is taken when the casting time is greater than or equal to 50 minutes T mark ℃=8℃，Y △T DEG C= (DELTAT actual ℃ DELTA T) Label (C) ）*1.2；
Delta when the casting time is greater than or equal to 35 minutes and less than 50 minutes T mark ℃=5℃+0.2*（T Cycle time -35）℃，Y △T ℃=（△T Actual practice is that of ℃-△T Label (C) ）*1.1。
In some embodiments, determining a temperature of an effect of a blank pack run time during a ladle revolution includes:
when the actual blank running time is smaller than the standard blank running time, determining that the temperature influenced by the blank running time is 0;
when the actual blank operation time is not less than the standard blank operation time, according to the fifth temperature relation Z T-shaped hollow =T Empty space -T Mark and space Determining the temperature influenced by the running time of the blank ladle in the ladle turnover process;
wherein T is Empty space For the actual run time of the empty packet, T Mark and space Is the standard run time of the empty packet.
The characteristic that the heat dissipation of the steel ladle refractory increases along with the extension of the blank running time produces quantitative correlation, the standard blank running time is preset, and when the actual blank running time is smaller than the standard blank running time, the temperature can be understood not to be influenced. When the actual idling time is not less than the standard idling time, the temperature affected by the idling time is the standard idling time-the actual idling time.
For convenience of conversion Z T-shaped hollow ℃=（T Empty space min-T Mark and space min）/60*10℃。
In some embodiments, after determining the influencing factors for temperature and the temperature influenced by the influencing factors during ladle turnover, further comprising:
when the temperature affected by the temperature drop in the casting process and the temperature affected by the empty ladle operation time were both 0, the temperature affected by the energization amount in the refining process was recorded as 0.
When Y is △T ℃+Z T-shaped hollow When the temperature drop in the casting process accords with the established standard and the ladle empty turnover accords with the established time, the expressed ladle temperature drop tends to be stable, the refining power-on amount is not influenced, and X D The temperature is recorded as zero when the electricity consumption factor influences the temperature, and the steel ladle is n+1+2 …… X times refining steel feeding T n+1+2……x C=ladle n+1+2 …… X-1 times refining steel feeding T n+1+2……x-1 ℃。
In some embodiments, after determining the temperature of the n+1th refined steel of the ladle according to the temperature of the n-th refined steel and the temperature affected by the influencing factors, the method further comprises:
when the temperature drop in the actual casting process is smaller than the standard temperature drop, judging whether the temperature of the steel on the nth refining is larger than the highest value of the superheat range;
if it exceeds, it is based on the correction relation T n repair =T n+1 -（T Degree of superheat max - T Target superheat degree max ) Correcting the temperature of steel on the n+1st refining;
wherein T is n repair T for the temperature of the steel on the nth refining after correction n+1 T is the temperature of the steel on the n+1th refining Degree of superheat max T is the maximum value of the superheat degree Target superheat degree max Is the highest value of the standard superheat range.
Standard value range of superheat degree: t (T) Degree of superheat : non-alloyed structural steel: 13-17 ℃ and aluminum killed steel: 18-22 ℃, high carbon/low alloy steel: 10-15 ℃.
Fig. 2 is a schematic structural diagram of a device for determining a steel feeding temperature, which comprises:
a memory 21 for storing a computer program;
a processor 22 for implementing the steps of the above-mentioned method for determining the steel feeding temperature when executing a computer program.
The description of the device for determining the temperature of the steel material provided by the invention refers to the above embodiment, and is not repeated here.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of determining a steel loading temperature, comprising:
determining the temperature of steel on the nth refining of the ladle, wherein n is an integer not less than 1;
determining a temperature influence factor of the ladle on the temperature in the turnover process and the temperature influenced by the influence factor, wherein the influence factor comprises one or more of the combination of the power-on amount of the refining process, the temperature drop of the casting process and the blank running time;
and determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors.
2. The method for determining the temperature of steel feeding according to claim 1, wherein before determining the temperature of steel feeding for the n+1th refining of the ladle according to the temperature of steel feeding for the n refining and the temperature influenced by the influencing factors, further comprising:
determining a production mode of the steel ladle, wherein the production mode comprises one of special line production of single steel grade, non-special line production and special line production of replacement steel grade;
determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors, wherein the method comprises the following steps:
and determining the temperature of the steel on the n+1th refining of the ladle according to the production mode of the ladle, the temperature of the steel on the n refining and the temperature influenced by the influencing factors.
3. The method for determining the temperature of steel feeding according to claim 2, wherein when the production mode of the ladle is a special line production of a single steel grade, determining the temperature of the (n+1) th refined steel feeding of the ladle according to the temperature of the n-th refined steel feeding and the temperature influenced by the influencing factors comprises:
according to the first temperature relation T n+1 = T n +X D +Y △T +Z T-shaped hollow Determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors;
wherein T is n+1 T is the temperature of the steel on the n+1th refining of the ladle n X is the temperature of steel on the nth refining of the ladle D To influence the energization amount of the refining process on the temperature of the steel on the refining, Y △T Z is the influence of the temperature drop of the casting process on the temperature of the refined steel T-shaped hollow The influence of the run time of the blank on the temperature of the refined steel.
4. The method for determining the temperature of steel feeding according to claim 2, wherein when the production mode of the ladle is non-dedicated production or dedicated production for replacing steel grades, determining the temperature of steel feeding for the n+1th refining of the ladle according to the temperature of steel feeding for the n refining and the temperature influenced by the influencing factors comprises:
according to the second temperature relation T n+1 =T Outbound station +X D +Y △T +Z T-shaped hollow Determining the temperature of the steel on the n+1th refining of the ladle according to the temperature of the steel on the n refining and the temperature influenced by the influencing factors;
wherein X is D To influence the energization amount of the refining process on the temperature of the steel on the refining, Y △T Z is the influence of the temperature drop of the casting process on the temperature of the refined steel T-shaped hollow T is the influence of the blank running time on the temperature of the refined steel Outbound station =T Liquid and its preparation method +T Degree of superheat +T Procedure ，T Outbound station T is the outlet temperature of the ladle Liquid and its preparation method For liquidus temperature, T of steel type of molten steel contained in the ladle Procedure Positively correlated with the time of the ladle casting process, T Degree of superheat Is associated with the steel grade.
5. The method for determining the temperature of steel feeding according to claim 1, wherein determining the temperature of the influence of the energization amount of the refining process during ladle turnover comprises:
when the power-on quantity is not larger than the preset power quantity, determining that the temperature influenced by the power-on quantity is 0;
when the energizing quantity is larger than the preset electric quantity, according to a third temperature relation X D =the preset charge-on charge, determining a temperature affected by the on charge;
wherein X is D The effect of the amount of electrical energy to the refining process on the temperature of the steel being refined.
6. The method for determining the temperature of steel feeding according to claim 5, wherein determining the temperature of the casting process affected by the temperature drop during ladle turnover comprises:
when the temperature drop in the actual casting process is smaller than the standard temperature drop, determining that the temperature influenced by the temperature drop in the casting process is 0;
when the temperature drop in the actual casting process is not less than the standard temperature drop, according to a fourth temperature relation Y △T =（△ Tactual -△ T mark ) F, determining the temperature influenced by the temperature drop of the casting process in the ladle turnover process;
wherein Y is △T Delta is the effect of the temperature drop of the casting process on the temperature of the refined steel Tactual Delta for the temperature drop of the actual casting process T mark And f is an influence coefficient, and the actual casting temperature drop and the standard casting temperature drop are positively correlated with the time of the casting process.
7. The method for determining a temperature of steel feeding according to claim 6, wherein determining a temperature affected by an empty ladle operation time during a ladle turnover comprises:
when the actual blank running time is smaller than the standard blank running time, determining that the temperature influenced by the blank running time is 0;
according to a fifth temperature relationship when the actual blank operation time is not less than the standard blank operation timeZ is as follows T-shaped hollow =T Empty space -T Mark and space Determining the temperature influenced by the running time of the blank ladle in the ladle turnover process;
wherein T is Empty space For the actual empty packet run time, T Mark and space Is the standard run time of the empty packet.
8. The method for determining the temperature of steel feeding according to claim 7, wherein after determining the influence factors on the temperature during the turnover of the ladle and the temperature influenced by the influence factors, further comprising:
and when the temperature influenced by the temperature drop in the casting process and the temperature influenced by the empty ladle operation time are both 0, recording the temperature influenced by the electrifying amount in the refining process as 0.
9. The method for determining the temperature of steel feeding according to any one of claims 1 to 8, further comprising, after determining the temperature of the n+1th refined steel feeding of the ladle from the temperature of the n-th refined steel feeding and the temperature affected by the influencing factor:
when the temperature drop in the actual casting process is smaller than the standard temperature drop, judging whether the temperature of the steel on the nth refining is larger than the highest value of the superheat range;
if it exceeds, it is based on the correction relation T n repair =T n+1 -（T Degree of superheat max - T Target superheat degree max ) Correcting the temperature of the steel on the n+1th refining;
wherein T is n repair T for correcting the temperature of steel on the nth refining n+1 T is the temperature of the steel on the n+1th refining Degree of superheat max T is the maximum value of the superheat degree Target superheat degree max Is the highest value of the standard superheat range.
10. A steel feeding temperature determining device, characterized by comprising:
a memory for storing a computer program;
processor for carrying out the steps of the method for determining the temperature of steel feeding according to any one of claims 1 to 9 when executing said computer program.
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