Novel scouring-resistant thermal shock-resistant impact brick and preparation method thereof, and current stabilizer

A heat-resistant shock-resistant and scouring-resistant technology, used in manufacturing tools, casting equipment, metal processing equipment, etc., can solve the problems of low overall strength of aluminum-magnesium-carbon bricks, multiple openings of impact bricks, and perforation of impact bricks. Achieve the effect of improving continuous flushing time, ensuring safe production and preventing perforation

Active Publication Date: 2020-10-30
湖南省娄底市宏冶炉料有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing impact bricks use magnesia-carbon bricks and alumina-magnesia-carbon bricks. The thermal expansion of magnesia in magnesia-carbon bricks is easy to cause spalling and fracture, and the overall strength of alumina-magnesia-carbon bricks is not high. Both will cause certain pollution to molten steel, because of its high carbon content, it is especially not suitable for smelting high-quality special steel and other varieties
[0003] In order to meet the requirements of continuous pouring of steel, impact bricks have the problem of multiple pouring when the molten steel level is too low, and ordinary impact bricks are prone to accidents such as perforation and steel leakage

Method used

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  • Novel scouring-resistant thermal shock-resistant impact brick and preparation method thereof, and current stabilizer
  • Novel scouring-resistant thermal shock-resistant impact brick and preparation method thereof, and current stabilizer
  • Novel scouring-resistant thermal shock-resistant impact brick and preparation method thereof, and current stabilizer

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0058] The preparation method of impact brick 30 comprises the steps:

[0059] S1: Mix 6 parts by mass of silicon metal powder, 2 parts by mass of aluminum metal powder, 8 parts by mass of silicon carbide, 50 parts by mass of dense corundum, and 20 parts by mass of aluminum-magnesium spinel, then add 5% phenolic resin, and mill at 500rpm for 20min Uniform, integrally stamped and formed on a 1200-ton press to obtain a stamped and formed plate with a size of 50cm*50cm*7cm; baked to 350°C and cooled for later use.

[0060] Among them, the median particle size of metal silicon powder is 30μm, the particle size of metal aluminum powder is 60-100 mesh; the particle size of silicon carbide fine powder is <0.074mm; the particle size of spinel is 150-250 mesh; -1mm.

[0061] S2: 40 parts by mass of waste corundum with a specification of 5-8mm, 10 parts by mass of waste corundum with a specification of 3-5mm, 10 parts by mass of waste corundum with a specification of 1-3mm, 10 parts by m...

preparation Embodiment 2

[0066] The preparation method of impact brick 30 comprises the steps:

[0067] S1: Mix 5 parts by mass of silicon metal powder, 3 parts by mass of aluminum metal powder, 10 parts by mass of silicon carbide, 60 parts by mass of dense corundum, and 25 parts by mass of aluminum-magnesium spinel, then add 6% phenolic resin, and mill at 500 rpm for 25 minutes Uniform, integrally stamped and formed on a 1200-ton press to obtain a stamped and formed plate with a size of 50cm*50cm*7cm; baked to 350°C and cooled for later use.

[0068] Among them, the median particle size of metal silicon powder is 40μm, the particle size of metal aluminum powder is 60-100 mesh; the particle size of silicon carbide fine powder is <0.074mm; the particle size of spinel is 150-250 mesh; -1mm.

[0069] S2: 45 parts by mass of waste corundum with a specification of 5-8mm, 12 parts by mass of waste corundum with a specification of 3-5mm, 12 parts by mass of waste corundum with a specification of 1-3mm, 8 pa...

preparation Embodiment 3

[0073] The preparation method of impact brick 30 comprises the steps:

[0074] S1: Mix 5 parts by mass of silicon metal powder, 1.5 parts by mass of aluminum metal powder, 10 parts by mass of silicon carbide, 47 parts by mass of dense corundum, and 25 parts by mass of aluminum-magnesium spinel, then add 5% phenolic resin, and ball mill at 500rpm for 25min Uniform, integrally stamped and formed on a 1200-ton press to obtain a stamped and formed plate with a size of 50cm*50cm*7cm; baked to 350°C and cooled for later use.

[0075] The processing conditions of steps S2-S5 are the same as those of the preparation and implementation two.

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Abstract

The invention relates to a novel scouring-resistant thermal shock-resistant impact brick. The brick comprises a punch-formed plate and a casting-formed body. The punch-formed plate is prepared from the following raw materials: metal silicon powder, metal aluminum powder, silicon carbide, compact corundum, aluminum-magnesium spinel and an adhesive. The punch-formed plate is integrally punched andformed by using a press machine. The casting-formed body is prepared from a castable through mold casting, vibration molding, maintenance, demolding and baking. The casting-formed body is prepared from the following raw materials: waste corundum particles, fine white corundum powder, aluminum-calcium cement micro-powder, active aluminum powder, micro-silicon powder, a water reducing agent and water. The punch-formed plate is fixed to a preset position in a mold in advance, the periphery of the punch-formed plate is filled with the castable, and the casting-formed body and the punch-formed plate are integrally formed in a pouring mode. According to the impact brick, punch forming and casting forming are combined, material combination is optimized, waste refractory materials are recycled, the scouring resistance of the impact brick is improved, and the continuous scouring resistance time of the impact brick is 3-5 times or above compared with an existing magnesia carbon brick and the like.

Description

technical field [0001] The invention relates to the technical field of continuous casting materials, in particular to a novel erosion-resistant and heat-shock-resistant impact brick, which is used for making the impact area or current stabilizer of a tundish. Background technique [0002] As an important link in steelmaking production, continuous casting is the basis and guarantee for the entire steelmaking system to achieve high-efficiency and low-cost production. The tundish pouring is the process of converting molten steel into solid state, which is a key process in the continuous casting process. The tundish is an important functional container for receiving molten steel, splitting the molten steel, and promoting the floating of inclusions in the molten steel during the continuous casting process. The long service life, safety and stability of the tundish are the key factors to ensure the production efficiency of continuous casting, and the impact zone at the bottom of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/10C04B35/101C04B35/622B22D41/02
CPCB22D41/02C04B35/10C04B35/101C04B35/62204C04B35/66C04B2235/3222C04B2235/3826C04B2235/402C04B2235/428C04B2235/6562C04B2235/6567C04B2235/9676
Inventor 颜光强
Owner 湖南省娄底市宏冶炉料有限责任公司
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