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A molten iron desulfurizer dosage calculation method

A technology of hot metal desulfurization and calculation method, which is applied in the field of iron and steel metallurgy, can solve problems such as poor prediction accuracy of regression models, and achieve the effects of ensuring accuracy and stability, accurate results, and good tolerance

Active Publication Date: 2019-06-04
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hot metal desulfurization pretreatment is a complex nonlinear process, so the prediction accuracy of the traditional regression model is poor

Method used

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  • A molten iron desulfurizer dosage calculation method
  • A molten iron desulfurizer dosage calculation method
  • A molten iron desulfurizer dosage calculation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The heat to be processed is 8Y08362, and the temperature measurement, sampling, weighing and other tests shall be carried out before processing. The conditions of the molten iron before pre-desulfurization are as follows: the net weight of the molten iron is 115 t, the temperature is 1340 degrees Celsius, the initial sulfur content is 0.033%, and the target sulfur content is 0.002%. The model automatically collects detection data signals and performs calculations. The calculation process is shown in Table 1.

[0035] Table 1 8Y08362 model detected control furnace process conditions and magnesium powder injection amount correction results

[0036]

[0037] After selecting the optimal reference heat and correcting the reference heat, the final calculation result of the model is 79.03kg. After injection according to the calculated results, the outbound sulfur content of the furnace is 0.002%, which is the same as the target sulfur content of 0.002%.

Embodiment 2

[0039] The heat to be processed is 8Y08363, and the temperature measurement, sampling, weighing and other tests shall be carried out before processing. The conditions of the molten iron before pre-desulfurization are as follows: the net weight of the molten iron is 124t, the temperature is 1278 degrees Celsius, the initial sulfur content is 0.037%, and the target sulfur content is 0.001%. The model automatically collects detection data signals and performs calculations. The calculation process is shown in Table 2.

[0040] Table 2 8Y08363 model detected control furnace process conditions and magnesium powder injection amount correction results

[0041]

[0042] After selecting the optimal reference heat and correcting the reference heat, the final calculation result of the model is 93.68kg. After injection according to the calculated results, the outbound sulfur content of the furnace is 0.001%, which is the same as the target sulfur content of 0.001%.

Embodiment 3

[0044] Heat to be processed 8Y08417, temperature measurement, sampling, weighing and other tests shall be carried out before processing. The conditions of the molten iron before pre-desulfurization are as follows: the net weight of the molten iron is 119 t, the temperature is 1312 degrees Celsius, the initial sulfur content is 0.043%, and the target sulfur content is 0.013%. The model automatically collects detection data signals and performs calculations. The calculation process is shown in Table 3.

[0045] Table 3 8Y08417 model detected control furnace process conditions and magnesium powder injection amount correction results

[0046]

[0047] After selecting the optimal reference heat and correcting the reference heat, the model analyzes the standard deviation of the data set and automatically excludes the detected data 2 before calculation. The final calculation result of the model is 44.07kg. After injection according to the calculated results, the outbound sulfur c...

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Abstract

The invention relates to a method for calculating the using amount of a molten iron desulfurizing agent and belongs to the technical field of ferrous metallurgy. The method comprises steps of establishing a database of historical process records; Performing neural network model analysis according to the data in the database, and calculating an influence weight of each process factor on the dosageof the desulfurizing agent; Comparing all the data sets in the database with the to-be-predicted furnace process data; Correcting the difference between the data set and the to-be-predicted heat by using a regression model difference value; And carrying out data distribution analysis on the obtained correction result, removing abnormal data in the correction result, and solving an average number as a final calculation result of the desulfurizer dosage. According to the invention, by dynamically establishing the comparison calculation model based on the reference heat, and selecting the reference heat and calculating the difference by adopting the neural network model and the multiple regression model, and the method has the advantages of being high in calculation accuracy, good in result stability and capable of effectively avoiding abnormal data points.

Description

technical field [0001] The invention relates to a method for calculating the dosage of molten iron desulfurizer, in particular to the calculation method for the dosage of passivated magnesium powder desulfurizer in the pretreatment process of compound injection molten iron desulfurization, and belongs to the technical field of iron and steel metallurgy. Background technique [0002] Pre-desulfurization of converter molten iron is an important means for the production of low-sulfur and ultra-low-sulfur high-quality steel, which can effectively reduce costs, expand the range of varieties and simplify subsequent steelmaking operations. The pre-desulfurization methods of molten iron mainly include stirring method, injection method, wire feeding method, etc. Among them, the injection method has the advantages of flexible operation, large amount of molten iron treatment, low cost, and good metallurgical effect, and has become the mainstream desulfurization technology. Has been wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18G06N3/04G06F16/21C21C1/02C21C7/064
CPCY02P10/25
Inventor 高宇李阳巨伟峰李健肖加海张燕平贾新风张明
Owner HEBEI IRON AND STEEL