Addition Control Method of Converter Alloy

Abstract

The invention relates to the field of converter technology control, in particular to a converter alloy adding control method. The converter alloy adding control method comprises the following steps that a database is set up; the standard number of reference furnaces is set; the reference furnace of which index parameters are completely the same as those of a current converter is looked up from the database, choices are made according to lookup results, and an alloy adding scheme is determined according to data of the reference furnaces or determined by operators according to experience; after a product is qualified, the data of the current converter are added to the database to serve as data of the reference furnaces. According to the method, the data of the reference furnaces are succeeded experience, field data which are possibly lacked in actual work are supplemented, and then influence brought by blow stopping component lacking and free oxygen data lacking on an algorithm when calculation is conducted through the LP algorithm are eliminated; when the LP algorithm fails, a final alloy adding scheme is obtained through data weighting of the reference furnaces, the molten steel quality also can be guaranteed to a certain degree, and the condition that an alloy calculation model has no solution is greatly avoided.

Description

technical field [0001] The invention relates to the field of converter process control, in particular to a converter alloy addition control method. Background technique [0002] Converter steelmaking is the process of smelting molten iron and a small amount of scrap steel into qualified molten steel by oxygen blowing. According to the different steel manufacturing standards, it needs to be added in the furnace or in the ladle when charging the converter or when tapping the steel. Just the right amount of alloy. Due to the wide variety of alloys and the high price, adding an appropriate amount of alloy ratio in the process of smelting molten steel in the converter has always been a concern for steelmakers. The total cost is minimal. [0003] In the existing converter production process, most alloy addition calculations use LP (Linear programming) linear programming algorithms. Due to the lack of on-site conditions, such as missing blowing components and free oxygen data, th...

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Problems solved by technology

[0006] The LP algorithm needs to use the difference between the target composition of the steel grade and the blow-off composition of molten steel to calculate the element demand. In the actual production of the converter, the operator often uses the LP algorithm for alloy addition when the blow-stop composition data has not been obtained. Calculation, the reason for this reality is that the time interval from blowing off to tapping is short. If you wait for the blowing off before performing alloy addition calculations, and then notify L1 and equipment to feed, at this time due to the feeding equipment itself The limitation of the time is often too late to supply the material

At this time, in the absence of molten steel composition data, the LP algorithm loses a reliable data basis for calculating the alloy addition ratio

[0007] (2) Blowing off free oxygen data is inaccurate

[0010] (3) There is no corresponding processing when the LP algorithm has no solution

The scope of application is steel ladle. The alloy is blown into molten steel through the blowing pipe. There are requirements for the minimum particle size of the alloy. The calculation of the alloy addition is directly calculated by the weight and content formula. The LP algorithm is not used. At the same time, there are measurement errors, and the input plan cannot be guaranteed to be optimal. untie

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