CN104060024B - The forecasting procedure of converter real time temperature in a kind of vanadium extraction by converter blowing process - Google Patents
The forecasting procedure of converter real time temperature in a kind of vanadium extraction by converter blowing process Download PDFInfo
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Abstract
The invention discloses the forecasting procedure of converter real time temperature in a kind of vanadium extraction by converter blowing process, comprise: the funtcional relationship setting up the linear change of the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, converter charging temperature and converter real time temperature according to the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, converter terminal temperature and converter charging temperature, then adopts this funtcional relationship to calculate and the converter real time temperature forecast according to the real time temperature difference of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle.The present invention is according to above-mentioned funtcional relationship, in real time, according to the temperature head of vanadium extraction oxygen rifle Inlet and outlet water, converter Warm status is quantitatively described dynamically, namely accurate forecast is carried out to converter molten pool temperature, achieve the raising of vanadium extraction by converter blowing indices up hill and dale and automatically control.
Description
Technical field
The present invention relates to vanadium extraction by converter blowing technical field, particularly, relate to the forecasting procedure of converter real time temperature in a kind of vanadium extraction by converter blowing process.
Background technology
Vanadium is as the significant by-products of v-bearing titanomagnetite smelting, i.e. Appropriate application ore resource, can to allow the surplus profit that steel mill obtains except steel products simultaneously.Current domestic enterprise from vanadium titano-magnetite vanadium extraction what substantially adopt is the method for vanadium extraction by converter blowing.Vanadium extraction by converter blowing is the flow process added between blast furnace ironmaking and converter steelmaking.The high vanadium ferroalloy water obtained after smelting vanadium-titanium magnetite by blast furnace, delivers in converter extracting vanadium and blows with oxygen, and the oxide compound vanadium in molten iron being oxidized to vanadium under suitable smelting condition enters in slag, then reclaims vanadium slag and be further processed.
Vanadium extraction by converter blowing has that speed of response is fast, smelting cycle is short, v slag grade is good, production efficiency advantages of higher, but simultaneously due to the very complicated pyrometallurgical process that this process is made up of subprocess such as the heating of mass transfer, heat transfer, solid addition material and dissolving, chemical kinetics, mass balance and thermal equilibrium, the factor affecting terminal composition and temperature is a lot.
The key of vanadium extracting process vanadium extraction guarantor carbon is the control of suitable temp, and Theoretical Calculation and execute-in-place are put into practice, and terminal temperature general control, at 1360-1390 DEG C, just can obtain good vanadium extraction index and half steel quality.
The superfine people of poplar, to hold the production data of steel converter vanadium extraction for foundation, according to quality, energy conservation and thermodynamic principles, establishes the statistical process model of vanadium extraction by converter blowing.According to consumption, the input value such as temperature and composition of each input material, the predicted value of the output parameters such as the quantities received of each outputting material, composition can be obtained.
The vanadium extraction by converter blowing refrigerant forecasting model that the people such as Chen Cai build adopts RBF neural method.
Zhong Zhiqiang adopts RBF neural to establish vanadium extraction by converter blowing terminal model, comprises temperature model, end point carbon model, terminal vanadium model.
Yin Xijun uses the method for mathematical statistics and is optimized climbing steel converter vanadium extraction processing parameter based on the multiple linear regression analysis method of method of least squares, by data analysis, establishes the static model of climbing steel converter vanadium extraction and producing.
In sum, the vanadium extraction by converter blowing model set up at present, achieves the effect of certain test, but is static model due to this series of vanadium extraction model, cannot meet current actual process demand.Hot metal composition, temperature fluctuation are larger, as V, Si, Mn fluctuation in molten iron etc., adopt above-mentioned static model vanadium extraction, make the parameters such as refrigerant add-on, oxygen blow duration, terminal composition and temperature, sometimes there is very large deviation, vanadium slag quality and half steel quality are made a big impact, therefore cannot meet the actual needs of production.
Summary of the invention
The object of the invention is the defect causing too greatly vanadium slag quality and half steel Quality Down in order to overcome the temperature deviation forecast in existing static model vanadium extracting process, provide a kind of can the method for converter real time temperature in accurate forecast vanadium extraction by converter blowing process.
To achieve these goals, the invention provides the forecasting procedure of converter real time temperature in a kind of vanadium extraction by converter blowing process, wherein, the method comprises: the funtcional relationship setting up the linear change of the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, converter charging temperature and converter real time temperature according to the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, converter terminal temperature and converter charging temperature, then adopts this funtcional relationship calculate according to the real time temperature difference of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle and forecast converter real time temperature.
In vanadium extraction by converter blowing process provided by the invention converter real time temperature forecasting procedure in, followed the tracks of and data statistic analysis by scene, set up the funtcional relationship of the linear change of the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, converter charging temperature and converter real time temperature, in real time, dynamically according to the temperature head of the Inlet and outlet water of vanadium extraction oxygen gun cooling water, converter Warm status is quantitatively described, namely accurate forecast is carried out to the converter real time temperature real time temperature of molten bath (namely in converter), thus achieve the raising of vanadium extraction by converter blowing indices and automatically control.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the linear statistical figure implementing temperature factor K and converter charging temperature in one embodiment of the present invention;
Fig. 2 is the Statistical Comparison figure implementing to forecast in one embodiment of the present invention temperature and actual temperature; And
Fig. 3 is the linear statistical figure between the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle in comparative example and converter terminal temperature.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides the forecasting procedure of converter real time temperature in a kind of vanadium extraction by converter blowing process, the method comprises: the funtcional relationship setting up the linear change of the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, converter charging temperature and converter real time temperature according to the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, converter terminal temperature and converter charging temperature, then adopts this funtcional relationship calculate according to the real time temperature difference of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle and forecast converter real time temperature.
In the present invention, in vanadium extraction oxygen rifle, the temperature head of the Inlet and outlet water of water coolant refers to the leaving water temperature(LWT) (T of water coolant in vanadium extraction oxygen rifle
water outlet) with the inflow temperature (T of water coolant in vanadium extraction oxygen rifle
enter water) temperature head; Converter charging temperature (T
0) refer to the initial temperature of molten iron in converter; Converter terminal temperature (T
eventually) refer to smelting at the end of the temperature in molten bath in converter.
Preferably, the process setting up funtcional relationship comprises the following steps:
(1) basis is with following formula (I) accounting temperature COEFFICIENT K,
K=(T
eventually-T
0) ÷ T
differenceformula (I)
Wherein, T
eventuallyfor converter terminal temperature, T
0for converter charging temperature, K is temperature factor;
(2) by the temperature factor K that obtains in step (1) and converter charging temperature T
0between carry out linear statistical, set up the funtcional relationship Y=a × T of linear change
0+ b, obtains the temperature factor Y revised;
(3) set up as shown in the formula the funtcional relationship shown in (II) according to the temperature factor Y revised,
T=Y × T
difference+ T
0formula (II)
Wherein, T is the converter real time temperature of forecast.
Preferably, in vanadium extraction by converter blowing process, enter stove molten iron and contain C, Si, Mn, Ti and V, to enter the gross weight of stove molten iron for benchmark, the content of C is the content of 4.1-4.6 % by weight, Si is 0.05-0.3 % by weight, the content of Mn is 0.1-0.5 % by weight, the content of the content of Ti to be the content of 0.1-0.35 % by weight, V be 0.05-0.35 % by weight, Fe is 93-95.6 % by weight.
Preferably, converter charging temperature is 1150-1400 DEG C; More preferably, converter charging temperature is 1200-1320 DEG C.
Below in conjunction with embodiment, the present invention is further described.
In embodiment, real-time follow-up is carried out to the vanadium extraction by converter blowing of 116 heats, wherein, in vanadium extraction by converter blowing process, enter stove molten iron and contain C, Si, Mn, Ti, V and Fe, to enter the gross weight of stove molten iron for benchmark, the content of C is the content of 4.5 % by weight, Si is 0.1 % by weight, the content of Mn is 0.3 % by weight, the content of the content of Ti to be the content of 0.25 % by weight, V be 0.15 % by weight, Fe is 94.7 % by weight.
Record and add up the temperature head T of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle
difference, converter terminal temperature T
eventuallywith converter charging temperature T
0, then set up the temperature head T of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle
difference, converter charging temperature T
eventuallywith the funtcional relationship of the linear change of converter real time temperature T, particularly, the process setting up funtcional relationship is as follows:
(1) define nondimensional temperature factor K, a K to represent and often change 1 DEG C, the temperature that converter raises relative to the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle.According to the temperature factor K calculating each heat with following formula (I),
K=(T
eventually-T
0) ÷ T
differenceformula (I)
Wherein, T
eventuallyfor converter terminal temperature is the tapping temperature of vanadium extraction molten iron, T
0for converter charging temperature is the charging temperature of vanadium extraction molten iron, T
differencefor the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle;
(2) by the temperature factor K of 116 heats that obtains in step (1) and converter charging temperature T
0between carry out linear statistical, set up the funtcional relationship Y=a × T of linear change
0+ b, obtains a=-0.1072, b=147.44, therefore the temperature factor Y=-0.1072 × T revised
0+ 147.44, the wherein coefficient R of Y
2=0.7978, represent that the goodness of fit of the linear regression straight line of above-mentioned funtcional relationship is higher as can be seen here;
(3) set up as shown in the formula the funtcional relationship shown in (II) according to the temperature factor Y revised,
T=Y × T
difference+ T
0formula (II)
Wherein, T is the converter real time temperature of forecast.
Then, adopt the funtcional relationship shown in above-mentioned formula (II) according to the real time temperature difference T of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle
differencecalculate and forecast converter real time temperature T.Wherein, in the vanadium extraction by converter blowing process of above-mentioned 116 heats, T
enter water, T
water outlet, T
difference, T
0, T
eventually, K, Y and T be respectively as shown in table 1 below.
Table 1
Then, converter real time temperature T and the corresponding actual temperature of forecast method according to the present invention in the vanadium extraction by converter blowing of above-mentioned 116 heats obtained contrast, set up comparison diagram as shown in Figure 2, and the hit rate of Modling model statistical fluctuation temperature, result is as shown in table 2 below.
Table 2
As can be seen from Fig. 2 and table 2, the real time temperature of the converter in converter extracting vanadium converting process that can forecast with unerring accuracy according to method of the present invention.
Comparative example
The temperature head T of the vanadium extraction oxygen rifle Inlet and outlet water that converter extracting vanadium blowing starts and terminates only is considered in this comparative example
differencewith terminal temperature T
eventuallybetween relation, the statistical relationship of foundation is as shown in Figure 3.
As seen from Figure 3, blown by converter extracting vanadium and start and the temperature head T of vanadium extraction oxygen rifle Inlet and outlet water of end
differencewith terminal temperature T
eventuallyobtain the relative coefficient R of linear statistical
2be only 0.0033,0.0033 close to 0, it can be said that the goodness of fit of this linear regression straight line bright is lower, thus can not by the temperature head T of vanadium extraction oxygen rifle Inlet and outlet water
differenceforecast with unerring accuracy the real time temperature T of converter.
As can be seen here, in vanadium extraction by converter blowing process according to the present invention, the forecasting procedure of converter real time temperature can converter real time temperature T in accurate forecast vanadium extraction by converter blowing process, thus can realize the raising of vanadium extraction by converter blowing indices and automatically control.
Claims (4)
1. the forecasting procedure of converter real time temperature in a vanadium extraction by converter blowing process, it is characterized in that, the method comprises: the funtcional relationship setting up the linear change of the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, converter charging temperature and converter real time temperature according to the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, converter terminal temperature and converter charging temperature, then adopts this funtcional relationship calculate according to the real time temperature difference of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle and forecast converter real time temperature;
Wherein, the process setting up funtcional relationship comprises the following steps:
(1) basis is with following formula (I) accounting temperature COEFFICIENT K,
K=(T
eventually-T
0) ÷ T
differenceformula (I)
Wherein, T
eventuallyfor converter terminal temperature, T
0for converter charging temperature, T
differencefor the temperature head of the Inlet and outlet water of water coolant in vanadium extraction oxygen rifle, K is temperature factor;
(2) by the temperature factor K that obtains in step (1) and converter charging temperature T
0between carry out linear statistical, set up the funtcional relationship Y=a × T of linear change
0+ b, obtains the temperature factor Y revised;
(3) set up as shown in the formula the funtcional relationship shown in (II) according to the temperature factor Y revised,
T=Y × T
difference+ T
0formula (II)
Wherein, T is the converter real time temperature of forecast.
2. method according to claim 1, wherein, in vanadium extraction by converter blowing process, enter stove molten iron and contain C, Si, Mn, Ti, V and Fe, to enter the gross weight of stove molten iron for benchmark, the content of C is 4.1-4.6 % by weight, the content of the content of Si to be the content of 0.05-0.3 % by weight, Mn be 0.1-0.5 % by weight, Ti is 0.1-0.35 % by weight, the content of V is the content of 0.05-0.35 % by weight, Fe is 93-95.6 % by weight.
3. method according to claim 1, wherein, converter charging temperature is 1150-1400 DEG C.
4. method according to claim 3, wherein, converter charging temperature is 1200-1320 DEG C.
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| CN106048117A (en) * | 2016-08-12 | 2016-10-26 | 新兴铸管股份有限公司 | Method for simply determining furnace temperature of iron making blast furnace |
| CN112159882A (en) * | 2020-09-17 | 2021-01-01 | 德龙钢铁有限公司 | Oxygen lance cooling method capable of avoiding energy waste |
| CN113462851A (en) * | 2021-07-19 | 2021-10-01 | 新疆八一钢铁股份有限公司 | Operation method for determining end point temperature by converter oxygen lance water temperature difference |
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| CN101476014A (en) * | 2009-02-06 | 2009-07-08 | 北京北科创新科技发展有限公司 | Whole process dynamic monitoring method for converter steel melting |
| CN102127614A (en) * | 2011-01-01 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Control method for vanadium extraction by converter for removing vanadium and holding carbon |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476014A (en) * | 2009-02-06 | 2009-07-08 | 北京北科创新科技发展有限公司 | Whole process dynamic monitoring method for converter steel melting |
| CN102127614A (en) * | 2011-01-01 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Control method for vanadium extraction by converter for removing vanadium and holding carbon |
Non-Patent Citations (1)
| Title |
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| 基于人工神经网络的转炉冶炼终点控制模型的优化;朱新华;《中国优秀硕士学位论文全文数据库（工程科技I辑）》;20100715(第7期);第34-35页 * |
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