Preparation method of composite deoxidizer for steelmaking

A composite deoxidizer and uniform mixing technology, which is applied in the field of steel smelting and manufacturing to achieve the effects of fast reaction speed, shortened reduction time and reduced oxygen content

Inactive Publication Date: 2020-04-17
吉林常春高氮合金研发中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of prepar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] A method for preparing a composite deoxidizer for steelmaking specifically includes the following steps:

[0019] Step S1: Mix 120g CaO and 100g water evenly, and stir into a paste;

[0020] Step S2. Add 180g of aluminum powder to the part (about half) of the paste-like CaO, stir and mix uniformly to form a spherical particle structure, then dry the spherical particles, and then place them in the remaining paste-like CaO to make CaO Wrapped on spherical particles;

[0021] In step S3, 40 g of boron carbide, 70 g of boron phosphide, 200 g of silicon dioxide, and 490 g of ferrous sulfide are processed into a particle shape, which is then mixed with the particles prepared in step S2.

Example Embodiment

[0022] Example 2

[0023] A method for preparing a composite deoxidizer for steelmaking specifically includes the following steps:

[0024] Step S1: Mix 80 g of CaO and 60 g of water uniformly, and stir into a paste;

[0025] Step S2. Add 150g of aluminum powder into the part (about half) of the paste-like CaO, stir and mix uniformly to form a spherical particle structure, then dry the spherical particles, and then place them in the remaining paste-like CaO to make CaO Wrapped on spherical particles;

[0026] In step S3, 50 g of boron carbide, 80 g of boron phosphide, 250 g of silicon dioxide, and 390 g of ferrous sulfide are processed into a particle shape, which is then mixed with the particles prepared in step S2.

Example Embodiment

[0027] Example 3

[0028] A method for preparing a composite deoxidizer for steelmaking specifically includes the following steps:

[0029] Step S1: Mix 100g CaO and 80g water evenly, and stir into a paste;

[0030] Step S2. Add 200g of aluminum powder to part (about half) of the paste-like CaO, stir and mix uniformly to form a spherical particle structure, then dry the spherical particles, and then place them in the remaining paste-like CaO to make CaO Wrapped on spherical particles;

[0031] In step S3, 20 g of boron carbide, 50 g of boron phosphide, 220 g of silicon dioxide, and 410 g of ferrous sulfide are processed into a particle shape, and then mixed with the particles prepared in step S2.

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PUM

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Abstract

The invention relates to a preparation method of a composite deoxidizer for steelmaking. The preparation method specifically comprises the following steps of S1, uniformly mixing 8-12 parts by weightof CaO and water, and conducting stirring to obtain a paste; S2, adding 15-25 parts by weight of aluminum powder into part of pasty CaO, conducting uniform stirring and mixing to prepare a spherical particle structure, then drying the spherical particles, and then putting the spherical particles into the remaining pasty CaO, and wrapping the CaO on the spherical particles; and S3, machining 2-5 parts by weight of boron carbide, 5-8 parts by weight of boron phosphide, 20-25 parts by weight of silicon dioxide and 40-50 parts by weight of ferrous sulfide into granules, and mixing the granules with the particles prepared in the step S2. The deoxidizing agent prepared by the method is good in deoxidizing effect and quick in slag change, the addition amount of the aluminum powder can be greatlyreduced due to addition of the boride, and the mechanical property of steel is prevented from being influenced by excessive deoxidizing product aluminum oxide.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting and manufacturing, and relates to a deoxidizer for smelting, in particular to a [0002] A preparation method of a composite deoxidizer for steelmaking. Background technique [0003] The harmfulness of oxygen in steel is mainly manifested in the following three aspects. (1) Inclusions: When molten steel solidifies, the excess oxygen combines with other elements in the steel to form non-metallic inclusions, which destroys the continuity of the steel matrix and reduces the strength limit, impact toughness, elongation, etc. of the steel. Various mechanical properties, magnetic properties, welding properties, etc. (2) Bubble formation: The oxygen content in molten steel is too high, and it will react with carbon in the steel again during the casting process to generate CO gas, which will cause defects such as pores, looseness, and even rise in the steel ingot (billet). It will cause the ste...

Claims

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Application Information

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IPC IPC(8): C21C7/06
CPCC21C7/06
Inventor 陈咨伟
Owner 吉林常春高氮合金研发中心有限公司
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