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Impervious castable for aluminum melting furnace and preparation method

A castable and aluminum melting furnace technology, applied in the field of metallurgy, can solve the problems of peeling and damage of refractory materials, frequent maintenance of furnace lining, poor infiltration ability, etc., to improve quality, excellent infiltration ability, and improve the effect of use

Active Publication Date: 2019-03-01
SHANDONG LUMING NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, no matter what kind of transition layer lining material of aluminum melting furnace, due to long-term use in the environment of high temperature and temperature fluctuations, at the same time, according to the process requirements, different metal materials must be added into the furnace for alloying operation, the furnace lining is covered by aluminum liquid and alloy The erosion of materials, the erosion of the stirring and flowing metal liquid, and the thermal stress caused by frequent temperature fluctuations in the furnace will lead to peeling and damage of refractory materials, and even leakage, resulting in frequent maintenance of furnace lining
Especially at high temperature, the viscosity of molten aluminum is quite low, and its fluidity and scouring are very strong. However, the existing castables have poor resistance to the penetration of this high-temperature metal aluminum into its interior. Once the molten aluminum enters the castable liner The interior is easy to react with the active and easily replaced substances in the castable, such as silicon oxide, to form aluminum ash or corundum nodules to expand the volume and cause the lining to crack

Method used

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  • Impervious castable for aluminum melting furnace and preparation method
  • Impervious castable for aluminum melting furnace and preparation method
  • Impervious castable for aluminum melting furnace and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: A kind of anti-seepage castable for aluminum melting furnace, comprising the following raw materials in parts by weight: Al 2 o 3 The content is 75 parts of 42% low-porosity coke gemstone, 20 parts of micropowder composite material, 3 parts of sillimanite, 2 parts of calcium aluminate cement, 0.17 part of additive, and 0.1 part of water reducing agent.

[0035] The Al 2 o 3 The critical particle size of the low porosity burnt stone with a content of 42% is 5 mm, and the minimum particle size is 0.088 mm; the particle size of the composite fine powder is 0.5 μm; the particle size of the micro-swelling agent sillimanite is 0.02 mm.

[0036] The Al 2 o 3 The content is 42% Al in low porosity coke particles 2 o 3 The mass percentage content is ≥ 42%; the Al in the sillimanite 2 o 3 Mass percentage content ≥ 50%; Al in the pure calcium aluminate cement 2 o 3 The mass percentage content is more than or equal to 72%.

[0037] A method for preparing an ...

Embodiment 2

[0042] Embodiment 2: A kind of anti-seepage castable for aluminum melting furnace, comprising the following raw materials in parts by weight: Al 2 o 3 The content is 72 parts of 43% low-porosity coke gemstone, 23 parts of micropowder composite material, 2 parts of sillimanite, 3 parts of calcium aluminate cement, 0.18 part of additive, and 0.08 part of water reducer.

[0043] The Al 2 o 3 The critical particle size of the low-porosity burnt stone with a content of 43% is 3 mm, and the minimum particle size is 0.088 mm; the particle size of the composite micropowder is 0.5 μm; the particle size of the micro-swelling agent sillimanite is 0.02 mm.

[0044] The Al 2 o 3 Al content of 43% in low porosity coke particles 2 o 3 The mass percentage content is ≥ 43%; the Al in the sillimanite 2 o 3 Mass percentage content ≥ 50%; Al in the pure calcium aluminate cement 2 o 3 The mass percentage content is more than or equal to 72%.

[0045] A method for preparing an anti-seepa...

Embodiment 3

[0050] Embodiment 3: a kind of anti-seepage castable for aluminum melting furnace, comprising the following raw materials in parts by weight: Al 2 o 3 The content is 70 parts of 45% low-porosity coke gemstone, 21 parts of micropowder composite material, 2 parts of sillimanite, 3 parts of calcium aluminate cement, 0.17 part of additive, and 0.09 part of water reducer.

[0051] The Al 2 o 3 The critical particle size of the low porosity burnt stone with a content of 45% is 5 mm, and the minimum particle size is 0.088 mm; the particle size of the composite micropowder is 0.5 μm; the particle size of the micro-expansion agent sillimanite is 0.02 mm.

[0052] The Al 2 o 3 Al content of 45% in low porosity coke particles 2 o 3 The mass percent content is ≥ 45%; the Al in the sillimanite 2 o 3 Mass percentage content ≥ 50%; Al in the pure calcium aluminate cement 2 o 3 The mass percentage content is more than or equal to 72%.

[0053] A method for preparing an anti-seepage...

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Abstract

The invention belongs to the technical field of metallurgy and particularly relates to an impervious castable for an aluminum melting furnace and a preparation method. Low-porosity flint clay with aluminum oxide content of 42%-45% is used as aggregate of the castable; aluminum liquid permeation and erosion resistance of the castable is enhanced by adoption of a micropowder composite material, andporosity of the castable is adjusted; self-compaction of the castable is improved by additives; water consumption in a castable mixing process is reduced by a water reducing agent; high-temperature shrinkage of the castable is resisted by a slight expanding agent. The impervious castable for the aluminum melting furnace has advantages that density of castings is improved, a liquid-state substancewith high viscosity and great performances can be formed in a matrix material at a high temperature and capable of plugging pores in the castings to prevent high-temperature aluminum from permeating into a castable body, and accordingly contact between high-temperature aluminum and substances prone to reaction in the castable is reduced, and aluminum liquid permeation is prevented.

Description

technical field [0001] The invention relates to an anti-seepage pouring material for an aluminum melting furnace and a preparation method thereof, belonging to the technical field of metallurgy. Background technique [0002] The working transition layer material of the molten pool of the aluminum melting furnace is all made of high-alumina bricks in the use of traditional lining materials. This lining material will cause a lot of brick joints, and the molten aluminum can easily penetrate into the furnace lining along the brick joints. The interior reacts with the brick body material, thereby destroying the furnace lining material and reducing the service life of the furnace body. The working transition layer made of castables has good structural integrity of the furnace body, no gaps in masonry bricks, and high strength. Compared with high-alumina bricks, the service life of the aluminum melting furnace is greatly improved. Due to the superiority of the castable, it can rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B33/04
CPCC04B33/04C04B35/66C04B2235/3206C04B2235/3217C04B2235/3222C04B2235/3418C04B2235/3472C04B2235/447C04B2235/5427C04B2235/5436C04B2235/5445
Inventor 白明科刘永杰白明迅
Owner SHANDONG LUMING NEW MATERIALS
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