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Medium and low carbon steel mold flux for bloom and preparation method thereof

A technology for mold slag and low-carbon steel, applied in the field of metallurgical auxiliary materials for steelmaking, can solve the problems of large surface tension of mold slag, difficult slag inclusion, etc., and achieve the effects of significant economic and environmental benefits, less slag inclusion, and lower production costs.

Active Publication Date: 2019-08-30
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the purpose of the present invention is to address the deficiencies of the prior art, to provide a low-carbon steel mold flux for blooms, using low-cost magnesium slag as a raw material, reducing the amount of flux to increase the surface tension of the mold flux, and preparing The surface tension of the mold slag is high, the ability to wet the steel is strong, the adsorption and inclusion capacity is greatly enhanced, the steel slag interface is easy to separate, and the slag inclusion is not easy, which can reduce the inclusion defects caused by the mold slag factor and improve the internal quality of the pure steel

Method used

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  • Medium and low carbon steel mold flux for bloom and preparation method thereof

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Effect test

Embodiment 1

[0037] A medium-low-carbon steel mold flux for a bloom, prepared from the following raw materials in parts by weight: 19 parts of wollastonite, 40 parts of magnesium slag, 2 parts of quartz, 2 parts of bentonite, 6 parts of coke gemstone, 10 parts of fluorite, and soda ash 3 parts, 7 parts of boron glass powder, 3 parts of magnesia powder, 2 parts of 390 medium carbon graphite, 3 parts of high carbon earthy graphite, 2 parts of semi-reinforcing natural gas carbon black, 1.5 parts of binder and sodium lignosulfonate 0.3 parts.

[0038] Among them, the binder is yellow dextrin; the particle size of wollastonite, quartz, bentonite, burnt gemstone, fluorite, soda ash and boron glass powder is 200 mesh.

[0039] The preparation method of the low-carbon steel mold flux in the above-mentioned bloom comprises the following steps:

[0040] (1) Raw material pretreatment: Stir the magnesium slag evenly, dry its water content ≤ 1%, and crush it to a particle size of 200 mesh ≥ 95%. After...

Embodiment 2

[0048] A medium-low-carbon steel mold flux for a bloom, prepared from the following raw materials in parts by weight: 34 parts of wollastonite, 30 parts of magnesium slag, 3 parts of quartz, 1 part of bentonite, 5 parts of coke gemstone, 7 parts of fluorite, and soda ash 1 part, 4 parts of boron glass powder, 2 parts of magnesia powder, 4 parts of 390 medium carbon graphite, 4 parts of high carbon earthy graphite, 2 parts of semi-reinforced natural gas carbon black, 2 parts of binder and sodium lignosulfonate 0.3 parts.

[0049] Among them, the binder is yellow dextrin; the particle size of wollastonite, quartz, bentonite, burnt gemstone, fluorite, soda ash and boron glass powder is 200 mesh.

[0050] The preparation method of the low-carbon steel mold flux in the above-mentioned bloom comprises the following steps:

[0051] (1) Raw material pretreatment: Stir the magnesium slag evenly, dry it with a water content of ≤1%, crush it to a particle size of 200 mesh ≥95%, take sam...

Embodiment 3

[0059] A medium-low-carbon steel mold flux for a bloom, prepared from the following raw materials in parts by weight: 35 parts of wollastonite, 20 parts of magnesium slag, 6 parts of quartz, 5 parts of bentonite, 2 parts of coke gemstone, 5 parts of fluorite, and soda ash 2 parts, 2 parts of manganese carbonate, 3 parts of boron glass powder, 3 parts of magnesia powder, 5 parts of 390 medium carbon graphite, 6 parts of high carbon earthy graphite, 3 parts of semi-reinforcing natural gas carbon black, 3 parts of binder and 0.3 parts of sodium lignosulfonate.

[0060] Among them, the binder is yellow dextrin; wollastonite, quartz, bentonite, burnt gemstone, fluorite, soda ash, manganese carbonate, and boron glass powder all have a particle size of 200 mesh.

[0061] The preparation method of the low-carbon steel mold flux in the above-mentioned bloom comprises the following steps:

[0062] (1) Raw material pretreatment: Stir the magnesium slag evenly, dry its water content ≤ 1%...

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Abstract

The invention discloses bloom medium / low-carbon steel protecting slag and a preparation method thereof, and belongs to the field of steel making metallurgy accessories. The bloom medium / low-carbon steel protecting slag is prepared by the following raw materials in parts by weight: 19-39 parts of wollastonite, 20-40 parts of magnesium slag, 2-6 parts of quartz, 1-5 parts of bentonite, 2-6 parts offlint clay, 3-10 parts of fluorite, 1-3 parts of soda, 0-2 parts of manganese carbonate, 3-7 parts of boron glass powder, 1-4 parts of magnesia powder, 2-5 parts of 390 medium-carbon graphite, 3-6 parts of high-carbon soil graphite, 1.5-3 parts of semi-reinforced natural gas carbon black, 1.5-3 parts of binding agent, and 0.2-0.4 part of sodium lignin sulfonate. Low-cost magnesium slag is used asthe raw materials; the surface tension of the protecting slag is improved through reducing the use level of flux; the prepared protecting slag is high in surface tension and inclusion absorption capacity, easy to separate steel slag interfaces and not easy to include the slag; the inclusion defect caused by protecting slag factors can be reduced; and the internal quality of purified steel is improved.

Description

technical field [0001] The invention relates to the field of steelmaking and metallurgical auxiliary materials, in particular to a low-carbon steel mold slag for a bloom and a preparation method thereof. Background technique [0002] Medium and low carbon steel (C content 0.17-0.60%) has good mechanical properties, so it has a wide range of applications. [0003] The use of low-carbon steel is limited due to its low strength, but appropriately increasing the manganese content in carbon steel and adding trace amounts of vanadium, titanium, niobium and other alloying elements can greatly increase the strength of the steel. If the carbon content in the steel is reduced and a small amount of aluminum, boron and carbide forming elements are added, an ultra-low carbon bainite group can be obtained with high strength and good plasticity and toughness. The strength and hardness of medium carbon steel are higher than those of low carbon steel, but the plasticity and toughness are lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
Inventor 陈守杰王建伟杨利刘小军朱先狮
Owner HENAN TONGYU METALLURGY MATERIALS GRP