Preparation method for molten steel purifying agent

A purification agent and liquid steel technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problem of not promoting the growth, floating and removal of inclusions, not lowering the melting point of fine inclusions in steel, and unfavorable steel products Quality and other issues, to achieve the effect of improving purification effect, promoting removal and improving quality

Active Publication Date: 2017-10-13
MAANSHAN HUASHENG METALLURGICAL SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention improves the fluidity of the slag, purifies the molten steel to a certain extent, and reduces the content of inclusions in the molten steel. It can promote the growth, floating and removal of inclusions very well, which is not conducive to further improving the quality of steel products

Method used

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  • Preparation method for molten steel purifying agent
  • Preparation method for molten steel purifying agent
  • Preparation method for molten steel purifying agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The cleaning agent of this embodiment is granular, and the cleaning agent is spherical granular, and the particle diameter is 5 ~ 10mm; ): 1, the preferred 8:1 of the present embodiment, the effective components include aluminum metal, lime powder, silicon carbide powder, titanium dioxide and biomass, the effective components are as follows in parts by mass: 50-70 parts of metal aluminum, 20-70 parts of lime powder 40 parts, 5-20 parts of titanium dioxide, 5-15 parts of silicon carbide powder, 2-4 parts of biomass, selected in this embodiment: 60 kg of aluminum metal, 30 kg of lime powder, 18 kg of titanium dioxide, 15 kg of silicon carbide powder, and 3 kg of biomass.

[0042]It is worth noting that each component in the effective components is in powder form, and the particle size is ≤0.1mm, that is, metal aluminum, lime powder, titanium dioxide, and silicon carbide powder are in powder form, and metal aluminum, lime powder, titanium dioxide, raw The particle size of ...

Embodiment 2

[0067] The basic content of this embodiment is the same as that of Example 1, except that the cleaning agent is in the form of granules, the cleaning agent is in the form of spherical particles, and the diameter of the particles is 5-10mm; the cleaning agent includes effective components and bonding components, and the effective components The mass ratio to the adhesive component is (5-10):1, preferably 5:1 in this embodiment.

[0068] The effective components in the purification agent of this embodiment also include graphite powder, red jade soil and magnesium-manganese alloy; the effective components are composed according to the following mass parts, 50-70 parts of metal aluminum, 20-40 parts of lime powder, and 0-30 parts of graphite powder part, 5-20 parts of titanium dioxide, 5-15 parts of silicon carbide powder, 2-4 parts of biomass, 0-1 part of red jade soil, 0-2 part of magnesium-manganese alloy; the present embodiment is 50 kg of metal aluminum, 20 kg of lime powder, ...

Embodiment 3

[0079] The basic content of this embodiment is the same as that of Example 1, except that the adhesive component of the purifying agent also includes starch and kaolin, and the adhesive component is composed of the following parts by mass: 60-80 parts of kaolin, 20-40 parts of sulfonated phenolic resin parts, starch 0-10 parts, oil sands 0-5 parts. This embodiment is composed according to the following mass: 80 kg of kaolin, 40 kg of sulfonated phenolic resin, 5 kg of starch, and 2 kg of oil sand. Detect the total oxygen content in molten steel after modification, and record as shown in Table 1, the data change is as follows figure 1 As shown, the mass ratio of the effective component to the binding component is 6:1, and the mixture is completed to obtain the cleaning agent mixture.

[0080] A kind of preparation method of molten steel cleaning agent of the present embodiment, concrete steps are as follows:

[0081] Step 1: Preparation of Adhesive Components

[0082] Weigh ...

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Abstract

The invention discloses a preparation method for a molten steel purifying agent, and belongs to the technical field of steel purifying and smelting. The preparation method comprises the following steps of: mixing active ingredients with adhesion components to obtain a purifying agent mixture, wherein a mass ratio of the active ingredients to the adhesion components is (5-10) to 1, the active ingredients comprise metal aluminum, lime powder, silicon carbide powder, titanium dioxide and biomass, and the adhesion components comprise kaolin and sulfonated phenolic resin; and under action of a briquetting machine or a pelletizer, adhering and pelletizing the purifying agent mixture to obtain a granular purifying agent, and drying and cooling the granular purifying agent for later use. The purifying agent prepared by the preparation method reduces content of oxygen in molten liquid, and CO gas generated by reaction promotes floating removal of inclusion, so that removal of inclusion in steel is promoted; molten liquid treated by the purifying agent is relatively small in residual inclusion dimension and is uniform in distribution; and the active ingredients are matched with the adhesion components, so that the purifying effect of molten steel can be improved.

Description

technical field [0001] The invention belongs to the technical field of clean steel smelting, and more specifically relates to a preparation method of a molten steel purifying agent. Background technique [0002] The performance of steel mainly depends on the chemical composition and structure of steel. The existence of inclusions in the steel destroys the continuity of the steel matrix and causes the inhomogeneity of the steel structure, which will affect the ductility, strength, toughness, fatigue performance, smoothness, corrosion resistance, welding performance and electromagnetic properties of the steel. big impact. The continuous casting process will also cause nozzle nodules, which have a great impact on the production of the continuous casting process and the quality of the slab. Therefore, iron and steel researchers from various countries have devoted a lot of energy to the research on the removal of inclusions in steel, and have also achieved great results in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04B22F1/00
CPCC21C7/0037C21C7/04B22F1/065B22F1/10
Inventor 王海军从俊强凌海涛杨建刘桂成
Owner MAANSHAN HUASHENG METALLURGICAL SCI & TECH DEV
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