CN111922326B - Method and device for obtaining plasma heating efficiency of tundish, electronic equipment and computer readable storage medium - Google Patents
Method and device for obtaining plasma heating efficiency of tundish, electronic equipment and computer readable storage medium Download PDFInfo
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- CN111922326B CN111922326B CN202010887333.6A CN202010887333A CN111922326B CN 111922326 B CN111922326 B CN 111922326B CN 202010887333 A CN202010887333 A CN 202010887333A CN 111922326 B CN111922326 B CN 111922326B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 426
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000003860 storage Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 217
- 239000010959 steel Substances 0.000 claims abstract description 217
- 239000000498 cooling water Substances 0.000 claims abstract description 82
- 239000002893 slag Substances 0.000 claims abstract description 33
- 230000017525 heat dissipation Effects 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000004907 flux Effects 0.000 claims abstract description 21
- 230000005855 radiation Effects 0.000 claims description 43
- 239000011819 refractory material Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 20
- 238000004590 computer program Methods 0.000 claims description 12
- 230000015654 memory Effects 0.000 claims description 11
- 238000004401 flow injection analysis Methods 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000005457 Black-body radiation Effects 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011800 void material Substances 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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
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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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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention provides a method, a device, electronic equipment and a computer readable storage medium for acquiring the plasma heating efficiency of a tundish, comprising the following steps: collecting heating parameters of plasma heating of the tundish; acquiring heat generated by plasma heating according to the plasma heating power and the heating time in the heating parameters; acquiring the total heat absorbed by the heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of the water inlet and the water outlet of the cooling water, the gas flow of the heating working medium, the temperature rise of the heating working medium, the ladle cover temperature of the tundish, the surface temperature of the slag layer, the area of the ladle cover, the side area of the tundish, the heat dissipation heat flux of each surface, the environmental temperature, the area of the long water gap, the temperature of the molten steel and the total mass of the molten steel in the heating parameters; and acquiring the plasma heating efficiency of the tundish based on the heat generated by the plasma heating and the total heat absorbed by the heated molten steel. By the method and the device, the plasma heating efficiency value of the tundish can be efficiently and timely acquired.
Description
Technical Field
The invention relates to the technical field of plasma heating, in particular to a method and a device for obtaining plasma heating efficiency of a tundish, electronic equipment and a computer readable storage medium.
Background
The plasma heating technology is a technology for generating arc light to fully ionize a gas medium by applying certain electric energy to a plasma generator so as to heat the plasma energy in a highly concentrated manner, and tundish plasma heating is a heating method capable of compensating temperature drop in a tundish in time, and has important significance for stabilizing temperature change in the tundish, realizing constant-temperature pouring and improving casting blank quality. The operation economy of the tundish plasma heating needs to be evaluated through the tundish plasma heating efficiency, and the key parameters of related equipment can be timely adjusted through evaluating the tundish plasma heating efficiency, so that the tundish plasma heating efficiency is maintained in a better heating efficiency range, the economy of the tundish operation is improved, and the industrial field production is accurately and efficiently guided.
Currently, a method for determining the plasma heating efficiency of a tundish is to monitor the real-time change of the temperature of the tundish, and adjust related heating parameters according to the monitored temperature of the tundish, so that the temperature of the tundish is maintained within a reference temperature range corresponding to a better heating efficiency range, and thus, the better heating efficiency corresponding to the reference temperature range is determined to be the plasma heating efficiency of the tundish. However, in the method for obtaining the plasma heating efficiency of the tundish, since the heating parameters of the heating devices in different structures and different environments are different, and the structural parameters of the tundish are also different, the accuracy rate of the plasma heating efficiency of the tundish determined according to the reference temperature range is low, and the optimization of the plasma heating process of the tundish cannot be realized.
Disclosure of Invention
In view of the above, the present invention provides a method, an apparatus, an electronic device and a computer readable storage medium for obtaining a tundish plasma heating efficiency, so as to improve the accuracy of the obtained tundish plasma heating efficiency.
In a first aspect, an embodiment of the present invention provides a method for obtaining a plasma heating efficiency of a tundish, including:
collecting heating parameters of plasma heating of the tundish;
acquiring heat generated by plasma heating according to the plasma heating power and the heating time in the heating parameters;
acquiring the total heat absorbed by the heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of the water inlet and the water outlet of the cooling water, the gas flow of the heating working medium, the temperature rise of the heating working medium, the temperature of a tundish cover, the area of the tundish cover, the surface temperature of slag, the side area of the tundish, the heat dissipation heat flux of each surface, the ambient temperature, the area of a long water gap, the temperature of the molten steel and the total mass of the molten steel in the heating parameters;
and acquiring the plasma heating efficiency of the tundish based on the heat generated by the plasma heating and the total heat absorbed by the heated molten steel.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the obtaining of the total heat absorbed by the heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of the cooling water inlet and outlet, the gas flow rate of the heating working medium, the temperature rise of the gas of the heating working medium, the ladle cover temperature of the tundish, the area of the ladle cover, the slag surface temperature, the side area of the tundish, the heat dissipation heat flux of each surface, the ambient temperature, the area of the long nozzle, the temperature of the molten steel, and the total mass of the molten steel in the heating parameters includes:
calculating the heat taken away by the cooling water of the heating system according to the total mass of the cooling water, the temperature of the cooling water inlet and outlet and the heating time;
calculating the heat taken away by the heating working medium gas according to the flow rate of the heating working medium gas and the temperature rise of the heating working medium gas;
calculating the heat dissipation capacity of the tundish according to the attribute parameters of the slag and the tundish cover temperature, the cover area, the slag surface temperature, the side area of the tundish and the heat dissipation heat flux of each surface in the heating parameters;
calculating the radiant heat in the ladle pouring process according to the environment temperature, the area of the long nozzle and the temperature of the molten steel in the heating parameters;
calculating the heat brought in by the molten steel from the steel ladle into the tundish according to the total mass of the molten steel, the temperature of the molten steel and the heating time in the heating parameters, and calculating the heat input into the tundish based on the heat generated by plasma heating and the heat brought in by the molten steel from the steel ladle into the tundish;
calculating the heat required by the temperature rise of the molten steel according to the total mass of the molten steel, the temperature rise of the molten steel and the heating time in the heating parameters;
calculating the heat taken away by the molten steel flowing into the crystallizer according to the total mass of the molten steel, the temperature of the molten steel and the temperature of the molten steel at the outlet of the tundish in the heating parameters;
calculating the heat transmitted to the refractory material by plasma heating radiation according to the heat input into the tundish, the heat required by the temperature rise of the molten steel, the heat taken away by cooling water of a heating system, the heat taken away by heating working medium gas, the heat dissipation capacity of the tundish, the heat taken away by the molten steel flowing into the crystallizer and the radiation heat in the process of pouring the steel ladle;
and calculating the total heat absorbed by the heated molten steel according to the heat generated by plasma heating, the heat taken away by cooling water of a heating system, the heat taken away by heating working medium gas, the heat transmitted to the refractory material by plasma heating radiation and the heat dissipated by the tundish.
With reference to the first aspect or the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the method further includes:
and calculating the sum of the heat required by the temperature rise of the molten steel, the heat taken away by cooling water of a heating system, the heat taken away by heating working medium gas, the heat dissipated by the tundish, the heat taken away by the molten steel flowing into the crystallizer, the radiation heat in the process of pouring the steel ladle and the heat transmitted to the refractory material by plasma heating radiation to obtain the heat output to the tundish and display the heat.
With reference to the first aspect or the first possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the method further includes:
and judging whether the obtained tundish plasma heating efficiency is less than a preset lower limit optimized heating efficiency, if so, adjusting one or more parameters in the heating parameters to enable the tundish plasma heating efficiency after the parameters are adjusted to be greater than the lower limit optimized heating efficiency.
In a second aspect, an embodiment of the present invention further provides an apparatus for obtaining plasma heating efficiency of a tundish, including:
the parameter acquisition module is used for acquiring heating parameters of the plasma heating of the tundish;
the first heat obtaining module is used for obtaining heat generated by plasma heating according to the plasma heating power and the heating time in the heating parameters;
the second heat obtaining module is used for obtaining the total heat absorbed by the heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of the cooling water inlet and outlet, the gas flow of the heating working medium, the temperature rise of the heating working medium gas, the ladle cover temperature, the ladle cover area, the slag surface temperature, the side area of the tundish, the heat dissipation heat flux of each surface, the environment temperature, the long nozzle area, the molten steel temperature and the total mass of the molten steel in the heating parameters;
and the thermal efficiency acquisition module is used for acquiring the plasma heating efficiency of the tundish based on the heat generated by the plasma heating and the total heat absorbed by the heated molten steel.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the second heat acquiring module includes:
the first heat acquisition unit is used for calculating the heat taken away by the cooling water of the heating system according to the total mass of the cooling water, the temperature of the cooling water inlet and outlet and the heating time;
the second heat acquiring unit is used for calculating the heat taken away by the heating working medium gas according to the flow rate of the heating working medium gas and the temperature rise of the heating working medium gas;
the third heat obtaining unit is used for calculating the heat dissipating capacity of the tundish according to the attribute parameters of the slag and the tundish cover temperature, the cover area, the slag surface temperature, the side area of the tundish and the heat dissipating heat flux of each surface in the heating parameters;
the fourth heat acquisition unit is used for calculating the radiation heat in the ladle flow injection process according to the environment temperature, the area of the long nozzle and the temperature of the molten steel in the heating parameters;
a fifth heat acquiring unit, configured to calculate heat taken in by the molten steel from the steel ladle into the tundish according to the total mass of the molten steel, the temperature of the molten steel, and the heating time in the heating parameters, and calculate heat input into the tundish based on heat generated by plasma heating and heat taken in by the molten steel from the steel ladle into the tundish;
the sixth heat acquiring unit is used for calculating the heat required by the temperature rise of the molten steel according to the total mass of the molten steel, the temperature rise of the molten steel and the heating time in the heating parameters;
a seventh heat acquiring unit, configured to calculate, according to the total mass of the molten steel, the temperature of the molten steel, and the temperature of the molten steel at the outlet of the tundish in the heating parameters, the amount of heat taken away by the molten steel flowing into the crystallizer;
an eighth heat acquiring unit, configured to calculate heat transferred to the refractory material by plasma heating radiation according to heat input to the tundish, heat required by temperature rise of the molten steel, heat taken away by cooling water of the heating system, heat taken away by heating working medium gas, heat dissipated by the tundish, heat taken away by the molten steel flowing into the crystallizer, and radiation heat during pouring of the steel ladle;
and the ninth heat acquisition unit is used for calculating the total heat absorbed by the heated molten steel according to the heat generated by plasma heating, the heat taken away by the cooling water of the heating system, the heat taken away by the heating working medium gas, the heat transmitted to the refractory material by plasma heating radiation and the heat dissipated by the tundish.
With reference to the first possible implementation manner of the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the second heat acquiring module further includes:
and the tenth heat acquisition unit is used for calculating the sum of the heat required by the temperature rise of the molten steel, the heat taken away by cooling water of the heating system, the heat taken away by heating working medium gas, the heat dissipated by the tundish, the heat taken away by the molten steel flowing into the crystallizer, the radiation heat in the process of pouring the steel ladle and the heat transmitted to the refractory material by plasma heating radiation to obtain the heat of the output tundish and display the heat.
With reference to the second aspect, the first possible implementation manner of the second aspect, or the second possible implementation manner, an embodiment of the present invention provides a third possible implementation manner of the second aspect, where the apparatus further includes:
and the parameter adjusting module is used for judging whether the obtained tundish plasma heating efficiency is less than the preset lower limit optimized heating efficiency, if so, adjusting one or more parameters in the heating parameters so as to enable the tundish plasma heating efficiency after the parameters are adjusted to be greater than the lower limit optimized heating efficiency.
In a third aspect, an embodiment of the present application provides a computer device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the steps of the above method when executing the computer program.
In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, performs the steps of the method described above.
According to the method, the device, the electronic equipment and the computer readable storage medium for acquiring the plasma heating efficiency of the tundish, provided by the embodiment of the invention, the heating parameters of the plasma heating of the tundish are acquired; acquiring heat generated by plasma heating according to the plasma heating power and the heating time in the heating parameters; acquiring the total heat absorbed by the heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of the water inlet and the water outlet of the cooling water, the gas flow of the heating working medium, the temperature rise of the heating working medium, the temperature of a tundish cover, the area of the tundish cover, the surface temperature of slag, the side area of the tundish, the heat dissipation heat flux of each surface, the ambient temperature, the area of a long water gap, the temperature of the molten steel and the total mass of the molten steel in the heating parameters; and acquiring the plasma heating efficiency of the tundish based on the heat generated by the plasma heating and the total heat absorbed by the heated molten steel. Therefore, the thermal efficiency is calculated by collecting various heating parameters in the heating process, and the accuracy of the obtained tundish plasma heating efficiency can be improved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of a method for obtaining the plasma heating efficiency of a tundish according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an apparatus for obtaining the plasma heating efficiency of a tundish according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a computer device 300 according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
By monitoring the real-time change of the temperature of the tundish and adjusting related heating parameters according to the monitored temperature of the tundish, the heating parameters are maintained in a reference range corresponding to a better heating efficiency range, the temperature of the steel liquid in the tundish is increased to be close to a target value, and the better heating efficiency corresponding to the heating parameter range is determined as the plasma heating efficiency of the tundish. However, in practical application scenarios, since the heating parameters of the heating devices in different structures and different environments are different from the structural parameters of the tundish, it is difficult to calculate the plasma heating efficiency of the tundish, and an accurate heating efficiency value cannot be obtained in time, which is not beneficial to adjusting the heating parameters on site. In the embodiment of the invention, each element consuming energy in the heating process of the tundish is analyzed, the heating parameters in the plasma heating process of the tundish are collected in real time, the loss power of the energy-consuming elements is calculated based on the collected heating parameters, the plasma heating efficiency of the tundish is calculated based on the input power of the tundish and the loss power of each element by utilizing the heat balance principle, the plasma heating efficiency value of the tundish can be timely and efficiently obtained, and the heating parameters are adjusted according to the plasma heating efficiency of the tundish calculated in real time, so that the automatic control of plasma heating and the optimization of the plasma heating process of the tundish are realized.
Embodiments of the present invention provide a method, an apparatus, an electronic device, and a computer-readable storage medium for obtaining a tundish plasma heating efficiency, which are described below by way of embodiments.
Fig. 1 is a schematic flow chart of a method for obtaining the plasma heating efficiency of a tundish according to an embodiment of the present invention. As shown in fig. 1, the method includes:
in the embodiment of the present invention, the heating parameter is a related heating process parameter of the tundish plasma heating obtained through statistical analysis, and as an optional embodiment, the heating parameter includes but is not limited to: plasma heating power, heating time, total mass of cooling water, temperature of cooling water inlet and outlet, gas flow of heating working medium, temperature rise of heating working medium gas, tundish cover temperature, tundish cover area, slag surface temperature, side area of tundish, heat flux of heat radiation of each surface, environment temperature, long nozzle area, molten steel temperature, total mass of molten steel and the like. The total mass of the cooling water can be obtained through the flow rate of the cooling water and the heating time, and the total mass of the molten steel can be obtained through the steel passing amount and the heating time.
102, acquiring heat generated by plasma heating according to the plasma heating power and the heating time in the heating parameters;
in the embodiment of the invention, the heat generated by plasma heating is calculated by using the following formula:
Q2＝P*t
in the formula,
Q2heat generated for plasma heating;
p is plasma heating power;
t is the heating time.
103, acquiring total heat absorbed by heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of a water inlet and a water outlet of the cooling water, the gas flow of a heating working medium, the temperature rise of the heating working medium gas, the temperature of a tundish cover, the surface temperature of slag, the area of the tundish cover, the side area of the tundish, the heat dissipation heat flux of each surface, the environmental temperature, the area of a long water gap, the temperature of the molten steel and the total mass of the molten steel in the heating parameters;
in the embodiment of the present invention, as an optional embodiment, the method for obtaining the total heat absorbed by the heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of the cooling water inlet and outlet, the gas flow rate of the heating working medium, the temperature rise of the heating working medium gas, the temperature of the tundish cover, the area of the tundish cover, the temperature of the slag surface, the side area of the tundish, the heat dissipation heat flux of each surface, the environmental temperature, the area of the long nozzle, the temperature of the molten steel, and the total mass of the molten steel in the heating parameters includes:
a11, calculating the heat taken away by the cooling water of the heating system according to the total mass of the cooling water, the temperature of the cooling water inlet and outlet and the heating time;
in the embodiment of the invention, the heat quantity taken away by the cooling water of the heating system is calculated by using the following formula:
Qc＝cwater (W)*mWater (W)*(TGo out-TInto)*t
In the formula,
Qcheat taken away by cooling water for a heating system;
cwater (W)The specific heat capacity of cooling water;
mwater (W)Is the total mass of the cooling water;
Tgo outIs the temperature of the cooling water outlet;
TintoThe temperature of the water inlet for cooling water.
A12, calculating the heat taken away by the heating working medium gas according to the flow rate of the heating working medium gas and the temperature rise of the heating working medium gas;
in the embodiment of the invention, the heat taken away by the heating working medium gas is calculated by the following formula:
Qg＝cg*Vg*ΔTqi (Qi)*t
In the formula,
Qgheat taken away for heating working medium gas;
cgheating the specific heat capacity of the working medium gas;
Vgthe flow rate of the gas for heating the working medium;
ΔTqi (Qi)For heating working medium gas temperature rise.
A13, calculating the heat dissipation capacity of the tundish according to the tundish cover temperature, the tundish cover area, the slag surface temperature and the side area of the tundish in the attribute parameters of the slag and the heating parameters;
in the embodiment of the invention, the heat dissipation capacity of the tundish is equal to the sum of the heat dissipation capacity of the slag to the ladle cover and the heat dissipation capacity of the ladle lining, and the heat dissipation capacity of the tundish is calculated by using the following formula:
Qs＝Qa+Qd
Qd＝(q1×S1+q2×S2+q3×S3)×t
in the formula,
Qsheat dissipation capacity of the tundish is obtained;
Qathe heat radiation from the slag to the ladle cover;
Qdheat dissipation of the packing is achieved;
epsilon is the emissivity of the slag;
C0is the black body radiation coefficient;
T2is the slag surface temperature;
T3for the tundish cover(ii) temperature;
F1is the area of the ladle cover;
q1、q2、q3respectively the heat flux of the front surface, the side surface and the bottom surface of the tundish;
S1、S2、S3the front area, the side area and the bottom area of the tundish are respectively.
A14, calculating the radiation heat in the process of ladle pouring according to the environment temperature, the area of the long nozzle and the temperature of the molten steel in the heating parameters;
in the embodiment of the invention, the radiation heat in the ladle flow injection process is calculated by the following formula:
in the formula,
Qεradiating heat in the process of injecting flow into the steel ladle;
T1the temperature of the molten steel in the ladle is measured;
T5is ambient temperature;
F2is the area of the long nozzle.
A15, calculating the heat brought in by the molten steel from the steel ladle into the tundish according to the total mass of the molten steel, the temperature of the molten steel and the heating time in the heating parameters, and calculating the heat input into the tundish based on the heat generated by plasma heating and the heat brought in by the molten steel from the steel ladle into the tundish;
in the embodiment of the invention, because the molten steel has certain heat when entering the tundish from the steel ladle, the heat input into the tundish comprises the total heat supply and the heat brought by the molten steel entering the tundish from the steel ladle, and the heat input into the tundish is calculated by using the following formula:
Qinto＝Q1+Q2
In the formula,
QintoHeat input into the tundish;
Q1molten steel enters a tundish from a ladleThe heat brought in.
Wherein,
Q1＝c*m*T1*t
in the formula,
c is the specific heat capacity of the molten steel;
and m is the total mass of the molten steel.
A16, calculating the heat required by the temperature rise of the molten steel according to the total mass of the molten steel, the temperature rise of the molten steel and the heating time in the heating parameters;
in the embodiment of the invention, the heat required by the temperature rise of the molten steel is calculated by using the following formula:
Qm＝c*m*ΔT*t
in the formula,
Qmthe heat required for the temperature rise of the molten steel;
and delta T is the temperature rise of the molten steel in the heating process.
A17, calculating the heat taken away by the molten steel flowing into the crystallizer according to the total mass of the molten steel, the temperature of the molten steel and the temperature of the molten steel at the outlet of the tundish in the heating parameters;
in the embodiment of the invention, the heat taken away by the molten steel flowing into the crystallizer is calculated by the following formula:
Qb＝c*m*ΔT*T4
in the formula,
Qbthe heat taken away by the molten steel flowing into the crystallizer;
T4the temperature of the molten steel at the outlet of the tundish.
A18, calculating the heat transmitted to the refractory material by the plasma heating radiation according to the heat input into the tundish, the heat required by the temperature rise of the molten steel, the heat taken away by the cooling water of the heating system, the heat taken away by the heating working medium gas, the heat dissipated by the tundish, the heat taken away by the molten steel flowing into the crystallizer and the radiation heat in the process of pouring the steel ladle;
in the embodiment of the invention, the heat quantity transferred to the refractory material by the plasma heating radiation is calculated by the following formula:
Qh＝Qinto-(Qm+Qc+Qg+Qs+Qb+Qε)
In the formula,
Qhheat transferred to the refractory material is radiated for plasma heating.
A19, calculating the total heat absorbed by the heated molten steel according to the heat generated by plasma heating, the heat taken away by the cooling water of the heating system, the heat taken away by the heating working medium gas, the heat transmitted to the refractory material by plasma heating radiation and the heat dissipated by the tundish.
In the embodiment of the invention, the total heat absorbed by the heated molten steel is calculated by the following formula:
Q＝Q2-Qc-Qg-Qh-Qs
in the formula,
q is the total heat absorbed by the heated molten steel.
And 104, acquiring the plasma heating efficiency of the tundish based on the heat generated by the plasma heating and the total heat absorbed by the heated molten steel.
In the embodiment of the invention, the plasma heating efficiency of the tundish is calculated by the following formula:
in the formula,
eta is the plasma heating efficiency of the tundish.
In the embodiment of the invention, the heat absorbed by the melting of the tundish slag is ignored.
The program code segment corresponding to the embodiment of the invention is as follows:
#include<stdio.h>
#include<math.h>
void main(){
float
Q1,Q2,Q3,C1,m1,t,T1,P,Qm,T2,Qc,C2,v,Tc,Qg,Cg,Tg,Vg,Qs,Qa,Qd,Qb,T3,Qz,x,Qh,y,z,Q4,S1,S2,S3,S4,T4,T5；
c1 ═ 0.88; v/molten steel specific heat kJ/(kg. degree. C.)
C2 ═ 4.2; // cooling water specific heat kJ/(kg. degree. C.)
P is 500; // plasma heating power of a single electrode
t is 11; // heating time
m1 ═ 5.0; volume of steel
1565, T1 ═ 1565; v/temperature of molten steel in pouring basket when ladle enters
T2 ═ 8; v/elevated temperature of molten Steel
1564 (T3); v/outlet temperature of molten steel in tundish
Tc 1; // cooling water temperature rise 1 degree
v is 150; cooling water flow
Tg 1000; v/temperature of the heating working gas
Vg ═ 169; // flow of heating medium gas
Cg is 2.52; v/specific heat capacity kJ/(m) of heating working medium gas3·℃)
S1 ═ 10; // frontal area m2
S2 ═ 1.78; // side area m2
S3 ═ 5.2; // base area m2
S4 ═ 0.38; // long nozzle area m2
T4 ═ 1130; v/slag surface temperature C
1100 for T5; v. ladle lid surface temperature
Q1 ═ C1 × m1 ═ 1000 × T1 × T; v/T/min is converted into kg/min, T1 is the temperature of molten steel entering a tundish, and the heat of molten steel brought into the tundish from a steel ladle
Q2 ═ P2 × t 60; v/plasma heating to generate Heat
Q3 ═ Q1+ Q2; // Q3 is the total heat input
// the heat output is
Qm-C1-m 1-1000-T2-T; v/t/min is converted into kg/min, and the heat required by the temperature rise of the molten steel
Qc ═ C2 ═ v ═ 1000 × (Tc) × (t/60); v/v is the cooling water flow, 1000 is 1000kg/m3Cooling water taking away heat
Qg Vg/1000 Cg Tg t; // converting the unit L into m3Heating the heat taken away by the working gas
Qa 0.8 × 5.67/1000 × pow ((T4+273.0)/100,4) -pow ((T5+273.0)/100,4)) × 7.58 × T60; // pow (x, y) denotes the y power of x, the radiant heat of the slag to the ladle cover
Qd ═ 60 × t/1000 (S1 × 2 × 4600+ S2 × 2 × 4000+ S3 × 1800); v/thermal dissipation with lining
Qs is Qa + Qd; // Qs is tundish heat dissipation
Qb ═ C1 × m1 × T3 × T1000; // T3 represents the temperature of the molten steel at the outlet of the tundish
Qz 0.28 × 5.67 × (pow ((T1+273.0)/100,4) -pow ((25.0+273.0)/100,4)) × S4 × T60/1000; /ladle pouring radiant heat
Q3-Qm-Qc-Qg-Qs-Qb-Qz; // refractory absorbing heat
Q4 ═ Qm + Qc + Qg + Qs + Qb + Qz + Qh; v/molten Steel Heat expenditure term
x ═ Q2-Qc-Qg-Qh-Qs)/Q2 × 100; // plasma heating efficiency
printf ("plasma heating efficiency% f%% \ n", x);
printf ("Heat input \ n \ n");
printf ("Heat, kj, in Heat percent, total/kj \ n"
"Heat quantity carried in molten steel,%. 2f,%. 2 f%%.2 f \ n",Q1,Q1/(Q1+Q2)*100,Q1+Q2)；
printf ("plasma heating generated heat,%. 2f,%. 2 f%,%. 2f \ n \ n", Q2, Q2/(Q1+ Q2) × 100, Q1+ Q2);
printf ("heat output item \ n \ n");
printf ("heat required for temperature rise of molten steel,%.2 f%,%.2 f \ n", Qm/Q4 × 100, Q4);
printf ("heat carried away by cooling water,%. 2f,%. 2 f%,%. 2f \ n", Qc/Q4 × 100, Q4);
printf ("heat carried away by working medium gas,%. 2f,%. 2 f%,%. 2f \ n", Qg/Q4 × 100, Q4);
printf ("tundish heat dissipation,%.2 f%,%.2 f \ n", Qs/Q4 × 100, Q4);
printf ("heat carried away in the crystallizer,%.2 f%,%.2 f \ n", Qb/Q4 × 100, Q4);
printf ("ladle pouring process radiation heat dissipation,%. 2f,%. 2 f%,%. 2f \ n", Qz/Q4 × 100, Q4);
printf ("heat transferred to refractory by plasma heating radiation,%. 2f,%. 2 f%,%. 2f \ n", Qh/Q4 × 100, Q4); the// output variable (two decimal places hold)
Wherein the variable is C1-specific heat of molten steel, kJ/(kg. DEG C)
p-single electrode power, kw
t-heating time, min
m 1-passing steel amount, t/min
T1-temperature of molten steel in ladle, C
T2-elevated temperature of molten steel in the tundish,. degree.C
T3-temperature of molten steel at the outlet of tundish,. degree.C
T4-surface temperature of slag ℃
T5-temperature of surface of ladle cover
Tc-Cooling Water temperature rising, deg.C
V-Cooling Water flow rate, m3/h
Tg-gas temperature rise,. degree.C
Vg-gas flow, m3/h
Cg-gas volumetric heat capacity, kJ/(m)3·℃)
S1, S2, S3-tundish surface area, m2
S4-area of long nozzle, m2
In this embodiment of the present invention, as an optional embodiment, the method further includes:
and calculating the sum of the heat required by the temperature rise of the molten steel, the heat taken away by cooling water of a heating system, the heat taken away by heating working medium gas, the heat dissipated by the tundish, the heat taken away by the molten steel flowing into the crystallizer, the radiation heat in the process of pouring the steel ladle and the heat transmitted to the refractory material by plasma heating radiation to obtain the heat output to the tundish and display the heat.
In the embodiment of the invention, the heat quantity of the output tundish is calculated and displayed according to the heat balance analysis and the input heat quantity is equal to the output heat quantity, so that related technicians can know more parameters in time to control the heating of the tundish.
In the embodiment of the invention, the heat of the output tundish is calculated by the following formula:
Qgo out＝Qm+Qc+Qg+Qs+Qb+Qε+Qh
In the formula,
Qgo outTo output the heat of the tundish.
In the embodiment of the invention, the heating parameters are acquired in real time in the process of heating the plasma of the tundish, the heating parameters are applied to the method of the embodiment of the invention, the real-time plasma heating efficiency of the tundish can be obtained, and the accuracy of the calculated plasma heating efficiency of the tundish is higher due to the acquisition of various operating parameters in the heating process, so that the operating state of the plasma heating of the tundish is adjusted according to the real-time plasma heating efficiency of the tundish, for example, related technicians quickly adjust the operating state of the plasma heating of the tundish according to the actual production condition, and finally the optimal heating effect of the plasma heating of the tundish is realized. Thus, as an alternative embodiment, the method further comprises:
and judging whether the obtained tundish plasma heating efficiency is less than a preset lower limit optimized heating efficiency, if so, adjusting one or more parameters in the heating parameters to enable the tundish plasma heating efficiency after the parameters are adjusted to be greater than the lower limit optimized heating efficiency.
The following specific examples are provided to describe the method of the embodiment of the present invention in detail, taking the example of plasma heating in the low carbon steel smelting in a certain steel plant:
for the first embodiment, the heating parameters are specifically: the heating time is 11min, the temperature of the molten steel is increased from 1556 ℃ to 1564 ℃ by 8 ℃, the average power of the plasma heating of the left electrode and the right electrode is respectively 500kw, the steel passing amount of a single outlet of the tundish is 2.5t/min, the temperature of the molten steel in the ladle is 1565 ℃, the temperature of the cooling water is increased by 1 ℃, and the flow of the cooling water is 150m3The temperature of the working medium gas rises to 1000 ℃, the flow rate of the working medium gas is 169L/min, the surface temperature of the tundish slag is 1130 ℃, the surface temperature of the tundish cover is 1100 ℃, and the front surface of the tundishProduct of 10m22, side area 1.78m22, bottom surface area of 5.2m2The area of the long nozzle of the ladle is 0.38m2. The plasma heating efficiency of the tundish obtained by the method of the embodiment of the invention is 58.21%.
For the first embodiment, there is a room for improving the plasma heating efficiency of the tundish of the first embodiment, and therefore, by adjusting the heating time, the electrode power, the single outlet steel flux, the cooling water flux and the working medium gas flux in the heating parameters, a comparative example is obtained, wherein each heating parameter of the comparative example is specifically as follows:
the heating time is 9min, the temperature of the molten steel is increased from 1555 ℃ to 1563 ℃, the temperature is increased by 8 ℃, the average power of the plasma heating of the left electrode and the right electrode is 620kw respectively, the total steel flux of an outlet is 5.0t/min, the temperature of the molten steel in a ladle is 1561 ℃, the temperature of the cooling water is increased by 1 ℃, and the flow of the cooling water is 152m3The temperature of the working medium gas rises to 1000 ℃, the flow rate of the working medium gas is 206L/min, the surface temperature of the tundish slag is 1130 ℃, the surface temperature of the tundish cover is 1100 ℃, and the area of the front side of the tundish is 10m22, side area 1.78m22, area of bottom surface 5.2m2The area of the long nozzle of the ladle is 0.38m2. The plasma heating efficiency of the tundish obtained by the method of the embodiment of the invention is 64.64%.
The method of the embodiment of the invention can prevent the condition that the plasma heating efficiency of the tundish is low by adjusting the heating parameters under the condition of ensuring the temperature rise, and can save the production cost, improve the economy of the plasma heating operation of the tundish and realize the accurate and high-efficiency guidance of industrial field production in a reasonable range of the plasma heating efficiency of the tundish by adjusting the heating process parameters.
Fig. 2 is a schematic structural diagram of an apparatus for obtaining the plasma heating efficiency of a tundish according to an embodiment of the present invention. As shown in fig. 2, the apparatus includes:
a parameter acquisition module 201, configured to acquire heating parameters for plasma heating of the tundish;
a first heat obtaining module 202, configured to obtain heat generated by plasma heating according to plasma heating power and heating time in the heating parameters;
in the embodiment of the invention, the heat generated by plasma heating is calculated by using the following formula:
Q2＝P*t
the second heat obtaining module 203 is used for obtaining the total heat absorbed by the heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of the cooling water inlet and outlet, the gas flow of the heating working medium, the temperature rise of the heating working medium gas, the ladle cover temperature of the tundish, the ladle cover area, the slag surface temperature, the side area of the tundish, the heat radiation heat flux of each surface, the environment temperature, the long nozzle area, the molten steel temperature and the total mass of the molten steel in the heating parameters;
and a thermal efficiency obtaining module 204, configured to obtain a tundish plasma heating efficiency based on the heat generated by the plasma heating and the total heat absorbed by the heated molten steel.
In this embodiment of the present invention, as an optional embodiment, the second heat obtaining module 203 includes:
the first heat obtaining unit (not shown in the figure) is used for calculating the heat taken away by the cooling water of the heating system according to the total mass of the cooling water, the temperature of the cooling water inlet and outlet and the heating time;
in the embodiment of the invention, the heat quantity taken away by the cooling water of the heating system is calculated by using the following formula:
Qc＝cwater (W)*mWater (W)*(TGo out-TInto)*t
The second heat acquiring unit is used for calculating the heat taken away by the heating working medium gas according to the flow rate of the heating working medium gas and the temperature rise of the heating working medium gas;
in the embodiment of the invention, the heat taken away by the heating working medium gas is calculated by the following formula:
Qg＝cg*Vg*ΔTqi (Qi)*t
The third heat obtaining unit is used for calculating the heat dissipating capacity of the tundish according to the attribute parameters of the slag and the tundish cover temperature, the cover area, the slag surface temperature, the side area of the tundish and the heat dissipating heat flux of each surface in the heating parameters;
in the embodiment of the invention, the heat dissipation capacity of the tundish is calculated by using the following formula:
Qs＝Qa+Qd
Qd＝(q1×S1+q2×S2+q3×S3)×t
the fourth heat acquisition unit is used for calculating the radiation heat in the ladle flow injection process according to the environment temperature, the area of the long nozzle and the temperature of the molten steel in the heating parameters;
in the embodiment of the invention, the radiation heat in the ladle flow injection process is calculated by the following formula:
a fifth heat acquiring unit, configured to calculate heat taken in by the molten steel from the steel ladle into the tundish according to the total mass of the molten steel, the temperature of the molten steel, and the heating time in the heating parameters, and calculate heat input into the tundish based on heat generated by plasma heating and heat taken in by the molten steel from the steel ladle into the tundish;
in the embodiment of the invention, the heat input into the tundish is calculated by the following formula:
Qinto＝Q1+Q2
Q1＝c*m*T1*t
The sixth heat acquiring unit is used for calculating the heat required by the temperature rise of the molten steel according to the total mass of the molten steel, the temperature rise of the molten steel and the heating time in the heating parameters;
in the embodiment of the invention, the heat required by the temperature rise of the molten steel is calculated by using the following formula:
Qm＝c*m*ΔT*t
a seventh heat acquiring unit, configured to calculate, according to the total mass of the molten steel, the temperature of the molten steel, and the temperature of the molten steel at the outlet of the tundish in the heating parameters, the amount of heat taken away by the molten steel flowing into the crystallizer;
in the embodiment of the invention, the heat taken away by the molten steel flowing into the crystallizer is calculated by the following formula:
Qb＝c*m*ΔT*T4
an eighth heat acquiring unit, configured to calculate heat transferred to the refractory material by plasma heating radiation according to heat input to the tundish, heat required by temperature rise of the molten steel, heat taken away by cooling water of the heating system, heat taken away by heating working medium gas, heat dissipated by the tundish, heat taken away by the molten steel flowing into the crystallizer, and radiation heat during pouring of the steel ladle;
in the embodiment of the invention, the heat quantity transferred to the refractory material by the plasma heating radiation is calculated by the following formula:
Qh＝Qinto-(Qm+Qc+Qg+Qs+Qb+Qε)
And the ninth heat acquisition unit is used for calculating the total heat absorbed by the heated molten steel according to the heat generated by plasma heating, the heat taken away by the cooling water of the heating system, the heat taken away by the heating working medium gas, the heat transmitted to the refractory material by plasma heating radiation and the heat dissipated by the tundish.
In the embodiment of the invention, the total heat absorbed by the heated molten steel is calculated by the following formula:
Q＝Q2-Qc-Qg-Qh-Qs
in this embodiment of the present invention, as another optional embodiment, the second heat obtaining module 203 further includes:
and the tenth heat acquisition unit is used for calculating the sum of the heat required by the temperature rise of the molten steel, the heat taken away by cooling water of the heating system, the heat taken away by heating working medium gas, the heat dissipated by the tundish, the heat taken away by the molten steel flowing into the crystallizer, the radiation heat in the process of pouring the steel ladle and the heat transmitted to the refractory material by plasma heating radiation to obtain the heat of the output tundish and display the heat.
In the embodiment of the invention, the heat of the output tundish is calculated by the following formula:
Qgo out＝Qm+Qc+Qg+Qs+Qb+Qε+Qh
In this embodiment of the present invention, as an optional embodiment, the apparatus further includes:
and a parameter adjusting module (not shown in the figure) for determining whether the obtained tundish plasma heating efficiency is less than a preset lower limit optimized heating efficiency, and if so, adjusting one or more parameters of the heating parameters so that the tundish plasma heating efficiency after the parameters are adjusted is greater than the lower limit optimized heating efficiency.
As shown in fig. 3, an embodiment of the present application provides a computer device 300 for executing the method for obtaining the plasma heating efficiency of the tundish in fig. 1, the device includes a memory 301, a processor 302 and a computer program stored in the memory 301 and executable on the processor 302, wherein the processor 302 implements the steps of the method for obtaining the plasma heating efficiency of the tundish when executing the computer program.
Specifically, the memory 301 and the processor 302 can be general-purpose memories and processors, and are not limited to these specific examples, and the processor 302 can execute the above method for obtaining the plasma heating efficiency of the tundish when executing the computer program stored in the memory 301.
Corresponding to the method for obtaining the plasma heating efficiency of the tundish in fig. 1, an embodiment of the present application further provides a computer readable storage medium, on which a computer program is stored, and the computer program is executed by a processor to perform the steps of the method for obtaining the plasma heating efficiency of the tundish.
Specifically, the storage medium can be a general-purpose storage medium, such as a removable disk, a hard disk, or the like, and when a computer program on the storage medium is executed, the method for obtaining the plasma heating efficiency of the tundish can be executed.
In the embodiments provided in the present application, it should be understood that the disclosed system and method may be implemented in other ways. The above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and there may be other divisions in actual implementation, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of systems or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the present disclosure, which should be construed in light of the above teachings. Are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A method for obtaining plasma heating efficiency of a tundish is characterized by comprising the following steps:
collecting heating parameters of plasma heating of the tundish;
acquiring heat generated by plasma heating according to the plasma heating power and the heating time in the heating parameters;
acquiring the total heat absorbed by the heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of the water inlet and the water outlet of the cooling water, the gas flow of the heating working medium, the temperature rise of the heating working medium, the ladle cover temperature of the tundish, the slag surface temperature, the ladle cover area, the side area of the tundish, the heat dissipation heat flux of each surface, the ambient temperature, the long water gap area, the molten steel temperature and the total mass of the molten steel in the heating parameters;
acquiring the plasma heating efficiency of the tundish based on the heat generated by the plasma heating and the total heat absorbed by the heated molten steel;
the basis plasma heating power, heating time, the total mass of cooling water, cooling water income delivery port temperature, heating working medium gas flow, heating working medium gas temperature rise, sediment surface temperature, middle package be built by contract temperature, be built by contract area, the side area of middle package, each face heat dissipation heat flux, ambient temperature, long mouth of a river area, molten steel temperature, the total mass of molten steel in the heating parameter acquire by the absorptive total heat of heating molten steel, include:
calculating the heat taken away by the cooling water of the heating system according to the total mass of the cooling water, the temperature of the cooling water inlet and outlet and the heating time;
calculating the heat taken away by the heating working medium gas according to the flow rate of the heating working medium gas and the temperature rise of the heating working medium gas;
calculating the heat dissipation capacity of the tundish according to the attribute parameters of the slag and the tundish cover temperature, the cover area, the slag surface temperature and the side area of the tundish in the heating parameters;
calculating the radiant heat in the ladle pouring process according to the environment temperature, the area of the long nozzle and the temperature of the molten steel in the heating parameters;
calculating the heat brought in by the molten steel from the steel ladle into the tundish according to the total mass of the molten steel, the temperature of the molten steel and the heating time in the heating parameters, and calculating the heat input into the tundish based on the heat generated by plasma heating and the heat brought in by the molten steel from the steel ladle into the tundish;
calculating the heat required by the temperature rise of the molten steel according to the total mass of the molten steel, the temperature rise of the molten steel and the heating time in the heating parameters;
calculating the heat taken away by the molten steel flowing into the crystallizer according to the total mass of the molten steel, the temperature of the molten steel and the temperature of the molten steel at the outlet of the tundish in the heating parameters;
calculating the heat transmitted to the refractory material by plasma heating radiation according to the heat input into the tundish, the heat required by the temperature rise of the molten steel, the heat taken away by cooling water of a heating system, the heat taken away by heating working medium gas, the heat dissipation capacity of the tundish, the heat taken away by the molten steel flowing into the crystallizer and the radiation heat in the process of pouring the steel ladle;
and calculating the total heat absorbed by the heated molten steel according to the heat generated by plasma heating, the heat taken away by cooling water of a heating system, the heat taken away by heating working medium gas, the heat transmitted to the refractory material by plasma heating radiation and the heat dissipated by the tundish.
2. The method of claim 1, further comprising:
and calculating the sum of the heat required by the temperature rise of the molten steel, the heat taken away by cooling water of a heating system, the heat taken away by heating working medium gas, the heat dissipated by the tundish, the heat taken away by the molten steel flowing into the crystallizer, the radiation heat in the process of pouring the steel ladle and the heat transmitted to the refractory material by plasma heating radiation to obtain the heat output to the tundish and display the heat.
3. The method of claim 1, further comprising:
and judging whether the obtained tundish plasma heating efficiency is less than a preset lower limit optimized heating efficiency, if so, adjusting one or more parameters in the heating parameters to enable the tundish plasma heating efficiency after the parameters are adjusted to be greater than the lower limit optimized heating efficiency.
4. An apparatus for obtaining a plasma heating efficiency of a tundish, comprising:
the parameter acquisition module is used for acquiring heating parameters of the plasma heating of the tundish;
the first heat obtaining module is used for obtaining heat generated by plasma heating according to the plasma heating power and the heating time in the heating parameters;
the second heat obtaining module is used for obtaining the total heat absorbed by the heated molten steel according to the plasma heating power, the heating time, the total mass of the cooling water, the temperature of the cooling water inlet and outlet, the gas flow of the heating working medium, the temperature rise of the heating working medium gas, the ladle cover temperature, the ladle cover area, the slag surface temperature, the side area of the tundish, the heat dissipation heat flux of each surface, the environment temperature, the long nozzle area, the molten steel temperature and the total mass of the molten steel in the heating parameters;
the thermal efficiency acquisition module is used for acquiring the plasma heating efficiency of the tundish based on the heat generated by the plasma heating and the total heat absorbed by the heated molten steel;
the second heat acquisition module comprises:
the first heat acquisition unit is used for calculating the heat taken away by the cooling water of the heating system according to the total mass of the cooling water, the temperature of the cooling water inlet and outlet and the heating time;
the second heat acquiring unit is used for calculating the heat taken away by the heating working medium gas according to the flow rate of the heating working medium gas and the temperature rise of the heating working medium gas;
the third heat obtaining unit is used for calculating the heat dissipation capacity of the tundish according to the attribute parameters of the slag, the tundish cover temperature, the cover area, the slag surface temperature and the side area of the tundish, and the heat dissipation heat flux of each surface;
the fourth heat acquisition unit is used for calculating the radiation heat in the ladle flow injection process according to the environment temperature, the area of the long nozzle and the temperature of the molten steel in the heating parameters;
a fifth heat acquiring unit, configured to calculate heat taken in by the molten steel from the steel ladle into the tundish according to the total mass of the molten steel, the temperature of the molten steel, and the heating time in the heating parameters, and calculate heat input into the tundish based on heat generated by plasma heating and heat taken in by the molten steel from the steel ladle into the tundish;
the sixth heat acquiring unit is used for calculating the heat required by the temperature rise of the molten steel according to the total mass of the molten steel, the temperature rise of the molten steel and the heating time in the heating parameters;
a seventh heat acquiring unit, configured to calculate, according to the total mass of the molten steel, the temperature of the molten steel, and the temperature of the molten steel at the outlet of the tundish in the heating parameters, the amount of heat taken away by the molten steel flowing into the crystallizer;
an eighth heat acquiring unit, configured to calculate heat transferred to the refractory material by plasma heating radiation according to heat input to the tundish, heat required by temperature rise of the molten steel, heat taken away by cooling water of the heating system, heat taken away by heating working medium gas, heat dissipated by the tundish, heat taken away by the molten steel flowing into the crystallizer, and radiation heat during pouring of the steel ladle;
and the ninth heat acquisition unit is used for calculating the total heat absorbed by the heated molten steel according to the heat generated by plasma heating, the heat taken away by the cooling water of the heating system, the heat taken away by the heating working medium gas, the heat transmitted to the refractory material by plasma heating radiation and the heat dissipated by the tundish.
5. The apparatus of claim 4, wherein the second heat acquisition module further comprises:
and the tenth heat acquisition unit is used for calculating the sum of the heat required by the temperature rise of the molten steel, the heat taken away by cooling water of the heating system, the heat taken away by heating working medium gas, the heat dissipated by the tundish, the heat taken away by the molten steel flowing into the crystallizer, the radiation heat in the process of pouring the steel ladle and the heat transmitted to the refractory material by plasma heating radiation to obtain the heat of the output tundish and display the heat.
6. The apparatus of claim 4 or 5, further comprising:
and the parameter adjusting module is used for judging whether the obtained tundish plasma heating efficiency is less than the preset lower limit optimized heating efficiency, if so, adjusting one or more parameters in the heating parameters so as to enable the tundish plasma heating efficiency after the parameters are adjusted to be greater than the lower limit optimized heating efficiency.
7. An electronic device, comprising: a processor, a memory and a bus, the memory storing machine readable instructions executable by the processor, the processor and the memory communicating over the bus when the electronic device is operating, the machine readable instructions when executed by the processor performing the steps of the method of obtaining tundish plasma heating efficiency according to any one of claims 1 to 3.
8. A computer-readable storage medium, having stored thereon a computer program for executing the steps of the method for obtaining a tundish plasma heating efficiency according to any one of claims 1 to 3, when the computer program is executed by a processor.
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| JP6428260B2 (en) * | 2014-12-26 | 2018-11-28 | 大同特殊鋼株式会社 | How to measure the amount of tapping water |
| CN107621781A (en) * | 2016-07-14 | 2018-01-23 | 中国石油化工股份有限公司 | Oil field heating furnace constant temperature heats and thermal efficiency Self-Optimizing Control Approach and system |
| CN107084805B (en) * | 2017-04-06 | 2019-08-23 | 东北大学 | A kind of method of determining Con casting ladle radiant heat flux |
| CN109269117B (en) * | 2018-08-10 | 2020-10-02 | 中国石油天然气股份有限公司 | Method for determining operating state of heating furnace |
| CN111383718B (en) * | 2018-12-29 | 2023-10-10 | 上海梅山钢铁股份有限公司 | Method for determining better position of tundish plasma heating based on Fluent software |
| CN111507624B (en) * | 2020-04-17 | 2023-07-25 | 华北电力科学研究院有限责任公司 | Method and device for acquiring boiler efficiency of thermal power plant |
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