Method for controlling alloy adding amount in converter tapping process

Abstract

The invention discloses a method for controlling the alloy adding amount in the converter tapping process. The method mainly solves the technical problems that the existing ferromanganese alloy adding amount is unreasonably controlled, and the carbon content and the phosphorus content in continuous casting molten steel exceed the standard. According to the technical scheme, the method for controlling the alloy adding amount in the converter tapping process comprises the following steps that current heat data are obtained; calculating the molten steel mass; calculating a control target of a manganese element and a non-manganese alloy element in the continuous casting molten steel; calculating the components of molten steel at the smelting end point of the converter and the redundancy of carbon and phosphorus in continuous casting molten steel; calculating the recarburization amount of the molten steel treated by the LF refining furnace; the aluminum alloy yield is calculated; calculating the adding mass of the aluminum alloy in the converter tapping process; calculating the total adding mass of the manganese alloy and the non-manganese alloy in the molten steel; the adding mass of the manganese alloy and the non-manganese alloy in the converter tapping process is calculated; and alloy adding in the converter tapping process is controlled. According to the method, the alloy cost is greatly reduced under the condition that the requirements of molten steel components are met.

Description

technical field [0001] The invention relates to a method for producing molten steel, in particular to a method for controlling the amount of alloy added in a converter tapping process, and belongs to the technical field of steel smelting and continuous casting. Background technique [0002] The converter tapping process needs to deoxidize the molten steel and adjust the composition of the molten steel, that is, deoxidize and alloy the molten steel, so that the composition of the molten steel in the ladle after tapping can meet the specified requirements (except RH vacuum decarburized steel). Manganese alloys used in actual production include high-carbon ferromanganese, medium-carbon ferromanganese and metal manganese, etc. From the perspective of cost, the prices of the three increase sequentially; from the perspective of quality, metal manganese is the purest, with a carbon mass percentage of less than 0.08%, the mass percentage of phosphorus is less than 0.03%, and the add...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for controlling the amount of alloy addition in the converter tapping process, which mainly solves the technical problems of unreasonable control of the existing ferromanganese alloy addition amount and excessive carbon content and phosphorus content in continuous casting steel water, so as to ensure that the molten steel Reduce the cost of manganese alloys while meeting the requirements

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