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Ladle filler sand filling method conducive to increasing cleanliness of IF (interstitial-free) steel

A technology for draining sand and cleanliness, applied in casting melt containers, metal processing equipment, casting equipment, etc., can solve problems such as deterioration of molten steel cleanliness, and achieve the effects of improving molten steel cleanliness, improving ladle self-priming rate, and reducing dosage.

Inactive Publication Date: 2019-10-29
MAANSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0010] Aiming at the deficiencies of the prior art, the present invention provides a method of filling sand with drainage sand which is beneficial to improve the cleanliness of IF steel, and solves the problem that the cleanliness of molten steel deteriorates due to the generation of foreign inclusions after the drainage sand enters the tundish

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  • Ladle filler sand filling method conducive to increasing cleanliness of IF (interstitial-free) steel
  • Ladle filler sand filling method conducive to increasing cleanliness of IF (interstitial-free) steel

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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] see Figure 1-2, the present invention provides a kind of technical scheme: a kind of drainage sand filling sand structure that is conducive to improving the cleanliness of IF steel, comprises ladle bag bottom brick 2, and the bottom of ladle bag bottom brick 2 is provided with cladding wall 11, and the bottom of cladding wall 11 A ladle upper slide 6 is provided, a ladle lower slide 7 is arranged below the ladle upper slide 6, a nozzle seat brick layer...

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Abstract

The invention discloses a ladle filler sand filling method conducive to increasing cleanliness of IF (interstitial-free) steel, and relates to the technical field of liquid steel purification. A ladlefiller sand filling structure conducive to increasing cleanliness of IF steel comprises ladle bottom bricks, wherein a ladle walls is arranged at bottoms of the ladle bottom bricks; an upper ladle slide plate is arranged at the bottom of the ladle wall; a lower ladle slide plate is arranged below the upper ladle slide plate. According to the ladle filler sand filling method conducive to increasing cleanliness of IF steel, after automatic casting of a ladle, ladle filler sand flows in a tundish with molten steel, and most sand remains as slag in tundish top slag after movement in an impact zone, so that oxidizability of the slag is improved; the rise of oxygen potential in the slag is positively correlated with oxygen potential in the liquid steel, and thus, oxygen content in the liquid steel can also increase after chromium-based ladle filler sand enters the top slag; the increase of the oxygen content in the tundish molten steel indicates the increase of oxide inclusion.

Description

technical field [0001] The invention relates to the technical field of molten steel purification, in particular to a sand filling method for draining and filling IF steel, which is beneficial to improving the cleanliness of IF steel. Background technique [0002] IF steel, the full name of Interstitial-Free Steel, is interstitial-free steel, which has excellent deep drawing performance and is widely used in automobiles, home appliances and other industries. In recent years, with the intensification of market competition, steel users have put forward more and more stringent requirements for the cleanliness of IF steel. In order to continuously improve the cleanliness of IF steel, steel mills have invested a lot of resources to continuously optimize the smelting process, but a large number of process optimization measures are mainly aimed at controlling endogenous inclusions, while the control measures for foreign inclusions are very limited. Foreign inclusions include slag, ...

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Application Information

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IPC IPC(8): B22D41/44
CPCB22D41/44
Inventor 乌力平李应江邓勇毛学庆张雷李宝庆胡晓光谢大为张虎丁太强周寿好熊华报魏刚孔磊单永刚尹纯锋
Owner MAANSHAN IRON & STEEL CO LTD
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