New slag system for synchronously controlling hydrogen-oxygen content of electroslag ingot and preparation method thereof

A simultaneous control and electroslag ingot technology, applied in the field of electroslag remelting slag system, can solve the problems of inability to effectively control the oxygen content and hydrogen content of steel ingots, reduce the hydrogen and oxygen content of steel ingots, and low hydrogen permeability, etc. Production efficiency and economic benefits, the effect of reducing hydrogen content and eliminating hydrogen permeation

Active Publication Date: 2013-12-25
ANHUI FUKAI STAINLESS STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to overcome the deficiency that the electroslag remelting slag system in the prior art cannot effectively control the oxygen content and hydrogen content in the steel ingot, and provide a new slag system and its preparation for simultaneously controlling the hydrogen-oxygen content of the electroslag ingot method, adopting the technical solution of the present invention, the prepared slag system has low oxygen and low hydrogen permeability, and can reduce the hydrogen and oxygen content of the steel ingot in the electroslag remelting process

Method used

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Embodiment 1

[0036] A new slag system that simultaneously controls the hydrogen-oxygen content of electroslag ingots in this embodiment, the composition and weight percentage of the slag system are: CaF 2 : 43%, CaO: 22%, Al 2 o 3 : 6%, MgO: 8%, Ce 2 o 3 : 16%, La 2 o 3 : 5%. The steps of its preparation method are specifically:

[0037] Step 1. According to the requirements of preparing slag components and weight percentage, the slag material is configured in proportion and mixed evenly. The slag material is limestone, dolomite, fluorite, bauxite, cerium oxide powder and lanthanum oxide powder. In this embodiment The slag composition and weight percentage are: CaF 2 : 43%, CaO: 22%, Al 2 o 3 : 6%, MgO: 8%, Ce 2 o 3 : 16%, La 2 o 3 : 5%; Wherein: the mass percentage of CaO in the limestone>54%, particle size 2~5mm; the mass percentage of MgO in the dolomite>20%, the mass percentage of CaO>30%, particle size 2~5mm; Medium CaF 2 The mass percentage of bauxite is more than 90%,...

Embodiment 2

[0044] A new slag system that simultaneously controls the hydrogen-oxygen content of electroslag ingots in this embodiment, the composition and weight percentage of the slag system are: CaF 2 : 45%, CaO: 20%, Al 2 o 3 : 5%, MgO: 10%, Ce 2 o 3 : 14%, La 2 o 3 : 6%. The steps of its preparation method are specifically:

[0045] Step 1. According to the requirements of preparing slag components and weight percentage, the slag material is configured in proportion and mixed evenly. The slag material is limestone, dolomite, fluorite, bauxite, cerium oxide powder and lanthanum oxide powder. In this embodiment The slag composition and weight percentage are: CaF 2 : 45%, CaO: 20%, Al 2 o 3 : 5%, MgO: 10%, Ce 2 o 3 : 14%, La 2 o 3 : 6%; Wherein: the mass percent of CaO in the limestone>54%, particle size 2~5mm; the mass percent of MgO in the dolomite>20%, the mass percent of CaO>30%, particle size 2~5mm; Medium CaF 2 The mass percentage of bauxite is more than 90%, and th...

Embodiment 3

[0050] A new slag system that simultaneously controls the hydrogen-oxygen content of electroslag ingots in this embodiment, the composition and weight percentage of the slag system are: CaF 2 : 47%, CaO: 18%, Al 2 o 3 : 4%, MgO: 12%, Ce 2 o 3 : 14%, La 2 o 3 : 5%. The steps of its preparation method are specifically:

[0051] Step 1. According to the requirements of preparing slag components and weight percentage, the slag material is configured in proportion and mixed evenly. The slag material is limestone, dolomite, fluorite, bauxite, cerium oxide powder and lanthanum oxide powder. In this embodiment The slag composition and weight percentage are: CaF 2 : 47%, CaO: 18%, Al 2 o 3 : 4%, MgO: 12%, Ce 2 o 3 : 14%, La 2 o 3 : 5%; Wherein: the mass percentage of CaO in the limestone>54%, particle size 2~5mm; the mass percentage of MgO in the dolomite>20%, the mass percentage of CaO>30%, particle size 2~5mm; Medium CaF 2 The mass percentage of bauxite is more than 90...

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Abstract

The invention discloses a new slag system for synchronously controlling the hydrogen-oxygen content of an electroslag ingot and a preparation method thereof, belonging to the technical field of an electroslag remelting slag system. The slag system comprises the following components in percentage by weight: 43-47% of CaF2, 18-22% of CaO, 4-6% of Al2O3, 8-12% of MgO, 14-16% of Ce2O3 and 4-6% of La2O3. The preparation method comprises the steps of proportionally preparing slag charge according to the components of the slag system and the weight percentage requirements, wherein the slag charge comprises limestone, dolomite, fluorite, bauxite, cerium oxide powder and lanthanum oxide powder; pre-melting the mixed slag charge at 1,600 DEG C, wherein the pre-melting process is performed by use of an Fe-Al electrode in an electroslag melting device; pouring the liquid-state slag charge into a steel mould; after the product is cooled, breaking and packaging. By adopting the new slag system and preparation method disclosed by the invention, the oxygen content increase of the electroslag ingot in the electroslag remelting process can be controlled to be less than 0.0008%, and the hydrogen content increase can be controlled to be less than 0.0003%, thereby achieving an aim of synchronously controlling the hydrogen content and oxygen content in the electroslag ingot.

Description

technical field [0001] The invention belongs to the technical field of electroslag remelting slag system, and more specifically relates to a new slag system capable of simultaneously controlling the hydrogen-oxygen content of an electroslag ingot and a preparation method thereof. Background technique [0002] The slag system plays an important role in the electroslag remelting process. It is not only related to the smooth progress of the electroslag remelting process, but more importantly, it has a decisive impact on the quality of the electroslag ingot. At present, the commonly used electroslag remelting slag system has the following two disadvantages: [0003] (1) The oxygen content in the steel ingot cannot be effectively controlled. The current research and production practice have found that when the oxygen in the electrode drops to a certain level, after electroslag remelting, the oxygen content will not be reduced, but will increase to a certain extent. Whether it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18
Inventor 常立忠施晓芳
Owner ANHUI FUKAI STAINLESS STEEL
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