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Fire-resistant composite material for investment casting lining as well as preparation method thereof

A technology of investment casting and composite materials, which is applied in the field of casting refractory materials, can solve the problems of affecting the stability of silica sol coatings, affecting the quality of castings, and consuming large foreign exchange, so as to achieve the effects of not easy peeling, good heat preservation, and reduced porosity

Inactive Publication Date: 2018-07-06
合肥聪亨新型建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the zircon used in domestic silica sol investment casting surface coatings is mainly imported from Australia, which not only consumes a large amount of foreign exchange, but also has a high price. In order to reduce the cost of castings and improve economic benefits, many investment casting manufacturers and some scientific research institutions are Actively try to use new low-cost refractory materials to replace zircon, including some refractory materials originally used as reinforcement layers, such as mullite powder, etc., but because these materials contain more impurities, when preparing silica sol coatings, the leached Ions can affect the stability of silica sol coatings, which in turn affect the quality of castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of refractory composite material for investment casting inner lining of this embodiment includes the following raw materials in parts by weight:

[0038] 10 parts of compound metal powder, 8 parts of silicon powder binder, 5 parts of inorganic binder, 15 parts of ore powder, 9 parts of modified composite filling soil, 8 parts of modified quartz powder, and 3 parts of flake graphite.

[0039] The composite metal powder in this embodiment is a mixture of alumina micropowder, zirconia micropowder, and titania micropowder in a weight ratio of 4:1:2, with a particle size of 3-6 μm.

[0040] The silica powder binder in this embodiment is: take clay and silica powder, put into ethylene glycol with 3 times the total mass of clay and silica powder, stir at 80°C for 25min, make clay and silica powder dissolve in ethylene glycol Disperse evenly.

[0041] The inorganic binder in this embodiment is a mixture of nano-silicon carbide and powdered water glass in a weight ratio ...

Embodiment 2

[0051] A kind of refractory composite material for investment casting inner lining of this embodiment includes the following raw materials in parts by weight:

[0052] 20 parts of compound metal powder, 14 parts of silicon powder binder, 9 parts of inorganic binder, 25 parts of ore powder, 13 parts of modified composite filling, 16 parts of modified quartz powder, and 5 parts of flake graphite.

[0053] The composite metal powder in this example is a mixture of alumina micropowder, zirconia micropowder, and titania micropowder in a weight ratio of 4:1:2, with a particle size of 6 μm.

[0054] The silicon powder binder in this embodiment is: take clay and silicon powder, put it into ethylene glycol with 5 times the total mass of clay and silicon powder, stir at 100°C for 30min, make clay and silicon powder dissolve in ethylene glycol Disperse evenly.

[0055] The inorganic binder in this embodiment is a mixture of nano-silicon carbide and powdered water glass in a weight ratio...

Embodiment 3

[0065] A kind of refractory composite material for investment casting inner lining of this embodiment includes the following raw materials in parts by weight:

[0066] 15 parts of compound metal powder, 11 parts of silicon powder binder, 7 parts of inorganic binder, 20 parts of ore powder, 11 parts of modified composite filling, 12 parts of modified quartz powder, and 4 parts of flake graphite.

[0067] The composite metal powder in this embodiment is a mixture of alumina micropowder, zirconia micropowder, and titania micropowder in a weight ratio of 4:1:2, with a particle size of 3-6 μm.

[0068] The silica powder binder in this embodiment is: take clay and silica powder, put into ethylene glycol with 4 times the total mass of clay and silica powder, stir at 90°C for 28min, make clay and silica powder dissolve in ethylene glycol Disperse evenly.

[0069] The inorganic binder in this embodiment is a mixture of nano-silicon carbide and powdered water glass in a weight ratio of...

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Abstract

The invention discloses a fire-resistant composite material for investment casting lining as well as a preparation method thereof. The fire-resistant composite material for investment casting lining comprises the following raw materials in parts by weight: 10 to 20 parts of compound metal powder, 8 to 14 parts of silicon powder adhesive, 5 to 9 parts of inorganic adhesive, 15 to 25 parts of mineral powder, 9 to 13 parts of modified composite filled earth, 8 to 16 parts of modified quartz powder and 3 to 5 parts of flake graphite. The fire-resistant composite material for investment casting lining has the characteristics of high volume stability, anti-stripping property, erosion resistance, avoidance of slag hanging and high heat-insulating property, and can withstand erosion and scouring of molten steel and furnace slag to avoid damage when being applied to the lining material; meanwhile, the raw material components are safe and reliable, the raw materials are easily available, the cost is low, the process is simple, operation is facilitated, industrialized production is realized easily, and high practical value and good application prospect are achieved.

Description

technical field [0001] The invention relates to the technical field of casting refractory materials, in particular to a refractory composite material for investment casting inner lining and a preparation method thereof. Background technique [0002] Unshaped refractories are mainly used in kilns, furnaces, [0003] Thermal equipment and structures, etc. For example, converters, electric furnaces, external refining furnaces, ladles, tundishes and other equipment in steelmaking systems; industrial furnace linings with various types and large quantities in steel rolling systems, etc. The application is very extensive. At present, the monolithic refractories produced in our country are still mostly produced by simple ore crushing, manual quantification, feeding, and simple stirring methods. [0004] The pollution of the working environment is serious, and the product quality is difficult to guarantee, resulting in uneven and unstable composition of the monolithic refractory p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 张瑞
Owner 合肥聪亨新型建材科技有限公司
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