Steel producing method capable of improving liquid steel casting property

A manufacturing method and technology of molten steel, applied in the field of steel manufacturing, can solve problems such as the difficulty in determining the amount of calcium wire to be fed, not involving the casting performance of molten steel, and the difficulty in grasping the content of inclusions, etc., so as to prevent nodules and improve casting performance , improve the effect of the manufacturing method

Inactive Publication Date: 2016-01-20
丁春燕
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the calcium wire is fed after the molten steel is pre-deoxidized. At this time, the inclusions are not fully floating, and the denaturation effect of the calcium treatment on the inclusions is affected. At the same time, the content of the inclusions in the molten steel is not easy to grasp. Therefore, feeding The amount of calcium filaments is difficult to determine
In addition, the method disclosed in the Chinese patent does not involve the casting performance of molten steel

Method used

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Examples

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Effect test

example 1

[0046] Utilize 70 tons of high-impedance ultra-high-power electric arc furnaces to produce 16Mn steel according to the manufacturing method of steel that improves molten steel casting performance according to the present invention, and its processing steps are as follows:

[0047] Initially smelt 69 tons of molten steel in the electric furnace. Add aluminum balls and silicon-aluminum-barium-calcium as a pre-deoxidizer to the ladle during the tapping process for pre-deoxidation, and use bottom blowing argon to stir, wherein, the amount of aluminum balls added is 1.1Kg per ton of steel, silicon-aluminum-barium The amount of calcium added is 3.5Kg per ton of steel. Then lift the ladle containing molten steel to the refining station of the LF furnace, feed 30Kg of aluminum wire, and then add synthetic slag at a rate of 13Kg per ton of steel. In 100 parts by weight of synthetic slag, it contains 65.4 parts by weight of CaO, 17.3 parts by weight of Al2O3, 3.0 parts by weight of SiO...

example 2

[0049] Utilize 70 tons of high-impedance ultra-high-power electric arc furnaces to produce Q345B steel according to the manufacturing method of steel that improves molten steel casting performance according to the present invention, and its process steps are as follows:

[0050] 72 tons of molten steel were initially smelted in the electric furnace. During the tapping process, aluminum balls and silicon aluminum barium calcium are added to the ladle as a pre-deoxidizer for pre-deoxidation, and bottom-blown argon is used to stir. Among them, the amount of aluminum balls added is 1.3Kg per ton of steel, silicon aluminum barium The amount of calcium added is 3.1Kg per ton of steel. Then lift the ladle containing molten steel to the refining station of the LF furnace, feed 40Kg aluminum wire, and then add synthetic slag at 12Kg per ton of steel. In 100 parts by weight of synthetic slag, it contains 65.4 parts by weight of CaO, 17.3 parts by weight of Al2O3, 3.0 parts by weight of...

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Abstract

The invention provides a steel producing method capable of improving the liquid steel casting property. The method includes the following steps that primary production of liquid steel is performed; a preliminary deoxidizing agent is added into a steel ladle in the process from steel tapping to the steel ladle; and the liquid steel is refined in a ladle furnace (LF), during refining of the liquid steel in the LF, aluminum is added into the liquid steel for precipitation and deoxidization, then synthetic slags are added into the steel ladle and heated, and after the synthetic slags are melted, a diffusing deoxidizing agent is added into the steel ladle for strengthened deoxidization. By means of the steel producing method capable of improving the liquid steel casting property, the liquid steel can be purified, nozzle clogging is effectively prevented, and the casting property of the liquid steel is improved. The steel producing method capable of improving the liquid steel casting property is simple, is easy and convenient to operate, and has excellent application prospects.

Description

technical field [0001] The invention relates to a steel manufacturing method for improving the casting performance of molten steel, more specifically, to a manufacturing method for improving the casting performance of molten steel. Background technique [0002] Controlling inclusions in steel is an important part of steelmaking process research. Non-metallic inclusions reduce the plasticity, toughness and fatigue properties of steel, and deteriorate the cold and hot processing performance and even some physical properties of steel. At the same time, non-metallic inclusions have a great influence on the casting performance of molten steel. [0003] Aluminum is a strong deoxidizing element, which can effectively reduce the oxygen content in molten steel to a low level, so it is widely used as a deoxidizer in the steelmaking process. The conventional process not only uses aluminum deoxidation in the process of primary molten steel smelting, but also adds aluminum precipitatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C21C5/28
CPCY02P10/20
Inventor 丁春燕
Owner 丁春燕
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