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Converter foamed slag pressing agent and using method thereof

A technology of slag pressing agent and foam slag, which is applied in the field of metallurgy, can solve problems such as splashing, blowing damage, and burning equipment, and achieve the effect of small particle size fluctuation range and cost reduction

Inactive Publication Date: 2011-10-12
DASHIQIAO RONGYUAN MAGNESIUM MINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Serious mistakes in operation will cause splashing, causing slag and iron to spurt out instantly, causing blowing damage and increasing the consumption of steel materials
At the same time, splashing also endangers the safety of operators and may burn equipment
Therefore, taking measures directly to suppress the development of foamy slag will be more beneficial to eliminate the hidden dangers caused by excessive foaming of slag, but there is no published literature introducing technical solutions to such problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composition of converter foam slag pressing agent contains CaO35%, MgO20%, Al 2 o 3 15%, SiO 2 15%, FeO0.6%, B 2 o 3 1.5%, impurity 12.9%, the appearance is spherical with a diameter of 20mm;

[0028] The preparation method is as follows: mix boron mud powder, metallurgical lime powder and aluminum ash evenly, and mix the mixing ratio according to the chemical analysis results of each raw material according to the above-mentioned components; wet the mixed material with water on the pelletizing machine and roll it into a ball with a diameter of 20mm, the amount of water used when wetting with water is subject to the ability to make the material into a ball;

[0029] Then dry naturally until the moisture weight content<1%, to obtain the converter foam slag pressing agent;

[0030] The method of use is:

[0031] Ordinary steel is smelted on a 150t converter, and the molten iron is pre-desulfurized;

[0032] Transport the converter foam slag pressing agent to the...

Embodiment 2

[0035] The composition of converter foam slag pressing agent contains CaO30%, MgO25%, Al 2 o 3 10%, SiO 2 10%, FeO0.9%, B 2 o 3 2.0%, impurity 22.1%, the appearance is spherical with a diameter of 25mm;

[0036] The preparation method is as follows: mix boron mud powder, metallurgical lime powder and aluminum ash evenly, and mix the mixing ratio according to the chemical analysis results of each raw material according to the above-mentioned components; wet the mixed material with water on the pelletizing machine and roll it into a ball with a diameter of 25mm, the amount of water used when wetting with water is subject to the ability to make the material into a ball;

[0037] Then dry it at 120±10°C until the moisture weight content is less than 1%, and obtain the converter foam slag pressing agent;

[0038] The method of use is:

[0039] The 80t converter smelts ordinary steel, and the molten iron is pre-desulfurized, so the composition of the molten iron is unstable;

...

Embodiment 3

[0043] The composition of converter foam slag pressing agent contains CaO30%, MgO25%, Al 2 o 3 10%, SiO 2 10%, FeO0.5%, B 2 o 3 2.5%, impurity 22%, the appearance is spherical with a diameter of 30mm;

[0044] The preparation method is as follows: mix boron mud powder, metallurgical lime powder and aluminum ash evenly, and mix the mixing ratio according to the chemical analysis results of each raw material according to the above-mentioned components; wet the mixed material with water on the pelletizing machine and roll it into a ball with a diameter of 30mm, the amount of water used when wetting with water is subject to the ability to make the material into a ball;

[0045] Then dry it at 120±10°C until the moisture weight content is less than 1%, and obtain the converter foam slag pressing agent;

[0046] The method of use is:

[0047] Transport the converter foam slag pressing agent to the converter top silo, add it into the converter from the feeding system, and add i...

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PUM

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Abstract

The invention discloses a converter foamed slag pressing agent and a using method thereof. The converter foamed slag pressing agent comprises the following components in percentage by weight: 30 to 35 percent of CaO, 20 to 25 percent of MgO, 10 to 15 percent of Al2O3, 10 to 15 percent of SiO2, less than 1 percent of FeO, 1.5 to 2.5 percent of B2O3, and the balance of impurities. The using method comprises that: the converter foamed slag pressing agent is added into a converter at the carbon oxidation period of converter blowing, wherein the adding amount of the slag pressing agent is 2 to 3 kg / t of molten steel. Wastes produced after the production of corresponding industries are used in the slag pressing agent, so the slag pressing agent is favorable for saving energy, improving the utilization rate of resources and protecting the environment, and simultaneously is favorable for promoting proper foaming in the converter.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a converter foam slag pressing agent and a using method thereof. Background technique [0002] During the smelting process of the converter, due to the strong impact of the oxygen jet on the molten pool and the boiling effect of CO bubbles generated by the carbon-oxygen reaction, the metal, slag and gas in the upper part of the molten pool are violently mixed in three phases, forming developed emulsification and foam in the converter. state. The accurate emulsification concept refers to the dispersion of metal droplets or bubbles in the slag. If the amount of droplets or bubbles is small and can move freely in the slag, this phenomenon is called slag steel or slag gas emulsification; if there are only bubbles in the slag, Moreover, if the number of bubbles is too large or the bubbles are too large to move freely, this phenomenon is called slag foaming, which is a ...

Claims

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Application Information

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IPC IPC(8): C21C5/28C21C5/36
Inventor 戴云阁王德康
Owner DASHIQIAO RONGYUAN MAGNESIUM MINE CO LTD