Control method for input amount of alloys in steelmaking

Abstract

The invention relates to the production and control fields in the metallurgy process, and especially to a control method for the input amount of different types of alloy in steelmaking. Standard yielding rates of different elements and target tapping components are set according to a smelting technology, and molten steel is selected as reference furnaces; production actual-performance data of the reference furnaces is used to calculate learning yield rates of the alloys; and an alloy input amount model is established, and the alloy input amounts are calculated according to the learning yield rates and used to control an alloy feeding operation of a bunker control system. According to the control method, the learning yield rates of the elements are obtained by selecting the reference furnaces and converted into an integrated alloy yielding rate, the alloy cost is optimized, a linear programming manner is used to determine the alloy input amount in a steelmaking area, components of the molten steel are controlled accurately, the alloy cost is reduced, and the smelting quality of the molten steel is improved by avoiding alloy with harmful elements.

Description

technical field [0001] The invention relates to the field of production and control of metallurgical processes, in particular to a method for controlling the input amount of various alloys during steelmaking. Background technique [0002] In converter steelmaking, LF refining, RH refining and other smelting processes in the steelmaking area, it is necessary to invest a certain amount of alloy to adjust the composition of molten steel to meet the requirements of the target composition of molten steel. In actual production operations, most of the requirements for the upper, middle, and lower limits of the content of various elements are based on the target composition of molten steel, and several effective alloys are selected from the available alloys, and the required addition combinations and quantities are calculated to meet According to the technological requirements of steelmaking, there are usually two solutions to this problem: [0003] Method 1, transforming it into a...

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Problems solved by technology

[0008] Using the above method can meet the calculation requirements of the general alloy demand, but there are two obvious defects in this method: first, the above method fails to consider that the total weight of molten steel will be changed after the alloy is put in, resulting in the target composition content of molten steel element % lower than required

Although this method is simple and quick to calculate, and can also avoid the promotion of harmful elements by selecting an appropriate alloy ratio, it also has the following defects: First, it also cannot solve the final target composition deviation caused by the increase of molten steel due to the addition of alloys; Second, because an alloy often contains a variety of alloying elements, when adjusting the composition of new elements, the target of the adjusted elements will be exceeded, and it needs to be readjusted

Due to the coupling effect of alloys containing multiple element components, it is impossible to find the alloy matching ratio that meets the target element composition requirements in extreme cases, and it is also impossible to guarantee the optimal alloy input cost

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