A sinter yield prediction method based on wind box exhaust gas temperature
A technology of exhaust gas temperature and prediction method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of inability to fully reflect the thermal state of the mixture, sinter yield prediction, etc., and achieve energy saving and reduction consumption, ensure accuracy and reasonableness, and improve the effect of yield
Active Publication Date: 2018-09-04
CHINA UNIV OF GEOSCIENCES (WUHAN)
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[0005] At present, during the sintering production process, workers mainly predict the yield of sintered ore through the temperature and position of the sintering end point, and adjust the amount of fuel and the speed of the sintering machine according to the test results. It has a certain hysteresis, and at the same time, only based on the temperature information at the end of sintering, it cannot fully reflect the thermal state of the mixture during the entire sintering process; Within the scope of the sintered ore, the quality and output of the sintered ore are judged, and the yield of the sintered ore is not directly predicted.
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[0051] The present invention will be further described below in conjunction with drawings and embodiments.
[0052] The present invention provides a method for predicting the yield of sintered ore based on the exhaust gas temperature of the bellows, please refer to image 3 , this embodiment includes the following steps:
[0053] (1) Determine the thermal state parameters that affect the yield of sintered ore by analyzing the mechanism of the sintering process of sintered ore. The sintering process includes solid phase reaction and liquid phase reaction. Liquid phase reaction will generate calcium ferrite liquid phase, calcium ferrite liquid The phase is the main factor affecting the yield of sintered ore, and the generation of calcium ferrite liquid phase is mainly affected by the thermal state of the sintered material layer, and the change of the thermal state of the sintered material layer can be reflected by the change of the exhaust gas temperature curve of the wind box. ...
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The invention discloses a sintered ore yield prediction method based on a bellows waste gas temperature. The method comprises the steps of: determining heat state parameters influencing on a sintered ore yield; building a history production data sample database of sintering parameters; calculating the sintered ore yield; adopting a polynomial fitting method to perform the curve fitting for bellows waste gas temperature data, and obtaining numerical values of the heat state parameters through a differential extremum method; building a sintered ore yield prediction model based on the numerical values of the heat state parameters; performing the curve fitting for bellows waste gas temperature data of an ore to be predicted to obtain numerical values of the heat state parameters of the ore to be predicted; and inputting the numerical values of the heat state parameters of the ore to be predicted into the sintered ore yield prediction model, and outputting a variable as the yield of the ore to be predicted. The method can accurately predict the sintered ore yield, and adjusts process parameters in real time in the sintering process to increase the sintered ore yield and to provide important basis for energy conservation and emission reduction.
Description
technical field [0001] The invention relates to the field of energy saving and consumption reduction in iron and steel sintering process production, in particular to a sinter yield prediction method based on the exhaust gas temperature of a bellows. Background technique [0002] The iron and steel industry is one of the pillar industries of the national economy, and the development of the iron and steel industry will also determine the development of our national economy. Steel has been widely used in national defense, transportation, construction, machinery manufacturing, automobile and other industries, and has a very important strategic position in the development of the national economy. Iron ore powder sintering is one of the important links in the iron and steel production process, and it is the key to ensure that the blast furnace can obtain high-quality sintered ore. It adds a certain amount of fuel and solvent to the iron-containing ore raw material, and spreads it ...
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IPC IPC(8): C22B1/16G06F19/00
CPCC22B1/16G16Z99/00
Inventor 吴敏陈鑫曹卫华陈略峰徐奔
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)