Al4SiC4 ternary non-oxide converter slag-stopping sliding plate and preparation method thereof

A converter slag blocking and non-oxide technology, which is applied in the field of adding Al4SiC4 ternary non-oxide converter slag blocking sliding bricks and its preparation, can solve the problems of low temperature strength reduction, poor thermal shock stability, etc., and achieves increased strength, improved High temperature strength, effect of improving oxidation resistance

Inactive Publication Date: 2020-02-14
MAANSHAN LIER KAIYUAN NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems of poor thermal shock stability, low high-temperature strength and reduced service life of existing ordinary converter slag-blocking sliding bricks, the present invention provides an Al-added 4 SiC 4 Ternary non-oxide converter slag retaining slide brick and preparation method thereof, by adding Al 4 SiC 4 , improve the thermal shock stability, high-temperature thermal strength, and high-temperature oxidation resistance of converter sliding bricks, and increase the service life of sliding bricks

Method used

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  • Al4SiC4 ternary non-oxide converter slag-stopping sliding plate and preparation method thereof
  • Al4SiC4 ternary non-oxide converter slag-stopping sliding plate and preparation method thereof

Examples

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Embodiment 1

[0047] The addition of Al in this embodiment 4 SiC 4The preparation method of the ternary non-oxide converter slag retaining slide brick comprises the following steps:

[0048] (1) Fine powder premixing: the platy corundum fine powder, Al 4 SiC 4 Fine powder, active α-Al 2 o 3 Micropowder, carbon black, metal Al powder, and composite antioxidant are premixed in a V-shaped mixer for 60 minutes, and the premixed fine powder is placed in a dry kang room at 60°C for 3 days;

[0049] (2) Particle material batching: 2.3-1mm tabular alumina particles, 1-0.5mm tabular corundum particles and 0.5-0.045mm tabular corundum particles are batched according to the weight percentage by the automatic batching system;

[0050] (3) Mixing and milling: Dry mix the granules in step (2) in an inclined high-speed mixer for 3 minutes, then add 4% composite liquid resin binder (first add silicone resin, then add phenolic resin) and wet mix 6 minutes, then add the pre-mixed fine powder in (1) ste...

Embodiment 2

[0059] The composition and weight percentage of the converter slag blocking slide described in this embodiment are: 28% of plate-shaped corundum particles with a particle diameter of 2.3-1mm, 17% of plate-shaped corundum particles with a particle diameter of 1-0.5mm, and a particle diameter of 0.5-0.045mm plate-shaped corundum particles 19%, 0-0.045mm plate-shaped corundum fine powder 14%, active α-Al 2 o 3 Micropowder 6.5%, Al 4 SiC 4 5% fine powder, 2.5% carbon black, 4% active metal aluminum powder, 4% composite antioxidant, the total percentage is 100%; plus 4.5% liquid resin binder.

Embodiment 3

[0061] The composition and weight percentage of the converter slag blocking slide described in this embodiment are: 31% of plate-shaped corundum particles with a particle diameter of 2.3-1mm, 15% of plate-shaped corundum particles with a particle diameter of 1-0.5mm, and a particle diameter of 0.5-0.045mm plate-shaped corundum particles 18%, 0-0.045mm plate-shaped corundum fine powder 15%, active α-Al 2 o 3 Micropowder 5%, Al 4 SiC 4 4% of fine powder, 3% of carbon black, 5% of active metal aluminum powder, 4% of composite antioxidant, the total percentage is 100%, and 5% of liquid resin binder is added.

[0062] The addition of Al described in Table 1 Examples 1 to 3 4 SiC 4 Physical and chemical properties of ternary non-oxide converter slag retaining slide

[0063]

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Abstract

The invention discloses an Al4SiC4 ternary non-oxide converter slag-stopping sliding plate and a preparation method thereof, and belongs to the technical field of sliding plates. The sliding plate includes the following components: 25-33 wt% of plate-shaped corundum particles having a particle size of 2.3-1 mm, 16-24 wt% of plate-shaped corundum particles having a particle size of 1-0.5 mm, 20-26wt% of plate-shaped corundum particles having a particle size of 0.5-0.045 mm, 10-15 wt% of plate-shaped corundum fine powder having a particle size of 0-0.045 mm, 5-8 wt% of active alpha-Al2O3 micropowder, 2-6 wt% of Al4SiC4 fine powder, 2-3 wt% of carbon black, 4-8 wt% of active metal aluminum powder, and 4 wt% of a composite antioxidant; and a compound liquid resin binder accounting for 4-5% ofthe total weight is added. The thermal shock stability, high-temperature thermal strength and high-temperature oxidation resistance of the converter sliding plate are improved, and the service life of the sliding plate is prolonged.

Description

technical field [0001] The invention belongs to the technical field of converter slag blocking sliding bricks, and more specifically relates to a 4 SiC 4 A ternary non-oxide converter slag-stopping sliding brick and a preparation method thereof. Background technique [0002] Conventionally, slag-stopping balls or slag-stopping cones are used for slag-stopping in converter tapping. About 1 minute before the end of tapping, the slag-stopping cones are manually put into the slag-stopping cones from the furnace mouth of the converter through a special bidding car, and the body density of the slag-stopping cones is between the steel slag and the The principle between the molten steel, the slag retaining cone is suspended between the steel slag and the molten steel, and after the steel is tapped, the slag retaining cone blocks the tapping hole to realize the slag retaining operation. The method has low slag blocking efficiency, large amount of slag lowered into the ladle, and hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/103
CPCC04B35/103C04B2235/3826C04B2235/402C04B2235/424C04B2235/5427C04B2235/5436C04B2235/606C04B2235/656C04B2235/6567C04B2235/77C04B2235/96
Inventor 周亮张远红陈正常纪凯汪玉娇宋普华
Owner MAANSHAN LIER KAIYUAN NEW MATERIAL
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