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Flux and method for refining molten steel using the same

A technology of flux and molten iron, which is applied in the steel manufacturing process, the improvement of process efficiency, and the manufacture of converters, etc., can solve the problems such as the decrease of sedation effect, and achieve the effect of suppressing or preventing splashing and improving the slag sedation effect

Inactive Publication Date: 2019-03-15
POHANG IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, since the flux is added through the hopper, the agglomerates are crushed to generate dust when falling, so the splash suppression effect, that is, the sedation effect is reduced.

Method used

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  • Flux and method for refining molten steel using the same
  • Flux and method for refining molten steel using the same
  • Flux and method for refining molten steel using the same

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Embodiment Construction

[0037] Below, the embodiment of the present invention will be described in more detail with reference to the accompanying drawings, but the present invention is not limited to the following embodiments and can be implemented in various ways, and the following embodiments are provided herein in order to disclose the present invention completely, so that the ordinary A skilled artisan fully appreciates the scope of the present invention. The same symbols in the drawings represent the same elements.

[0038] The invention relates to a flux which can effectively suppress foaming of molten slag and a method for refining molten iron using the flux. More particularly, the present invention relates to a flux capable of suppressing or preventing splashing of molten slag overflow and its addition method. In addition, the flux according to the embodiment may be a flux added to the slag in the slag pot when the slag in the converter is discharged into the slag pot.

[0039] Refer below ...

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Abstract

The present invention relates to a flux and a method for refining molten steel using the same. The method for refining molten steel according to the present invention comprises: a process of blowing oxygen into the molten steel in a converter to refine the molten steel; and after the molten steel refining is finished, discharging the slag in the converter to a slag tank disposed outside the converter; a process of adding a sedative to the slag in the slag tank, wherein the process of adding the sedative comprises: a process of mixing the flux and the solvent to prepare the sedative in which the flux is dissolved, and a process of spraying the sedative to the slag. Therefore, according to the embodiment of the present invention, since the flux is pulverized or dust is generated when the flux of the agglomerate shape is added through the hopper, the slag stagnation effect by the flux is higher than in the past. Therefore, when the slag is discharged to the slag tank, the splash can be more effectively suppressed or prevented.

Description

technical field [0001] The present invention relates to a flux and a method for refining molten iron using it. More particularly, the present invention relates to a flux capable of effectively suppressing slag splashing and a method of refining molten iron using the same. Background technique [0002] The molten iron from the blast furnace is generally dephosphorized and desulfurized in the pre-refining process, and then loaded into the converter together with scrap iron and steel. Then, in the converter, the blowing of oxygen is blown into the molten iron in the converter by using a lance to remove C, Si, P, Mn, etc., and quicklime (Ca0) is added to form slag. [0003] When oxygen is blown into the molten iron in the converter, silicon (Si) and phosphorus (P) with relatively high oxophilicity in the molten iron react with oxygen first. At this time, silicon (Si) reacts with oxygen to form SiO 2 , Phosphorus (P) reacts with oxygen to generate P 2 o 5 . Generated SiO 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076C21C5/28
CPCC21C5/28C21C7/0087C21C7/076Y02P10/20C21C5/36C21C2300/04
Inventor 朴贤绪徐成谟
Owner POHANG IRON & STEEL CO LTD
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