A preparation method of slag system that simultaneously controls the hydrogen-oxygen content of electroslag ingots

A simultaneous control and electroslag ingot technology, applied in the field of electroslag remelting slag system, can solve the problems of low hydrogen permeability, inability to effectively control the oxygen content and hydrogen content of steel ingots, reduce the hydrogen and oxygen content of steel ingots, and achieve reduction Hydrogen content, improve production efficiency and economic benefits, and prevent moisture absorption

Active Publication Date: 2016-06-15
ANHUI FUKAI STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] 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 the hydrogen content in the steel ingot, and provides a method for preparing the slag system that simultaneously controls the hydrogen-oxygen content of the electroslag ingot, Adopting the technical scheme of the present invention, the prepared slag system has low oxygen and low hydrogen permeability, which can reduce the hydrogen and oxygen content of the steel ingot in the electroslag remelting process

Method used

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  • A preparation method of slag system that simultaneously controls the hydrogen-oxygen content of electroslag ingots
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  • A preparation method of slag system that simultaneously controls the hydrogen-oxygen content of electroslag ingots

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Embodiment 1

[0032] 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:

[0033] 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 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 >90%, and the particle s...

Embodiment 2

[0040] 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:

[0041] 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 >90%, and the particl...

Embodiment 3

[0046] 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:

[0047] 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 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 >90%, and the particl...

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Abstract

The invention discloses a preparation method for a slag system of controlling the hydrogen and oxygen content in an ESR ingot at the same time, and belongs to the technical system of ESR slag systems. The slag system comprises, 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 includes the steps that slag materials are prepared according to a proportion according to the components and weight percentage requirement for preparing the slag system, and comprise limestone, dolomite, fluorite, bauxite, cerium oxide powder and lanthanum oxide powder; the mixed slag materials are pre-melted at the temperature of 1600 DEG C, and in the pre-melting process, Fe-Al electrodes are adopted inside an electro slag smelting device; liquid state slag materials are poured into a steel mold, cooled and packaged after breaking. The oxygen content of the ESR ingot can be controlled to be increased by smaller than 0.0008% in the process of electro slag remelting, the hydrogen content of the ESR ingot can be controlled to be increased by smaller than 0.0003%, and the purpose of controlling the hydrogen and oxygen content in the ESR ingot at the same time is achieved.

Description

[0001] The patent application of the present invention is a divisional application with the application number: 2013104293204. The filing date of the original application is: September 18, 2013. The name of the invention is: a new slag system that simultaneously controls the hydrogen-oxygen content of electroslag ingots. and its preparation method. technical field [0002] The invention belongs to the technical field of electroslag remelting slag systems, and more specifically relates to a method for preparing slag systems that simultaneously controls the hydrogen-oxygen content of electroslag ingots. Background technique [0003] 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:...

Claims

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Application Information

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