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Mullite carbon brick and preparation method thereof

A technology of mullite carbon brick and fused mullite, which is applied in the field of mullite carbon brick and its preparation, can solve the problems of magnesia raw material shortage and price rise, and achieve corrosion resistance and thermal shock resistance The effect of performance, steps are easy to operate, and the preparation method is simple

Inactive Publication Date: 2018-05-22
江苏苏嘉集团新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing magnesia raw material is in short supply and the price is soaring, and provides a kind of mullite carbon brick with sufficient raw material, low price and stable price and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A mullite carbon brick, comprising components by weight percentage: 75% fused mullite particles, 14% fused mullite fine powder, 8% carbon, 1% antioxidant, 2% binder .

[0024] The preparation method of mullite carbon brick comprises the steps:

[0025] (1) Mixing: Mixing is carried out with a rotary circulation mixer, and the fused mullite particles, fused mullite fine powder, carbon, antioxidant, and binder are weighed respectively according to the ratio of raw materials. Put the fused mullite particles into the mixer and dry mix for 5 minutes, then add phenolic resin and continue mixing for 5 minutes, then add carbon to it, mix for 8 minutes, finally add fused mullite fine powder and antioxidant and continue mixing for 10 minutes Form mud material, the speed of mixing machine is set at 970r / min;

[0026] (2) Compression molding: Add the mixed mud into the mold and use a composite vacuum friction brick press to press and form bricks with a pressure of 3000KN;

[002...

Embodiment 2

[0029] A mullite carbon brick, comprising components by weight percentage: 70% fused mullite particles, 20% fused mullite fine powder, 5% carbon, 2% antioxidant, 3% binder .

[0030] The preparation method of mullite carbon brick comprises the steps:

[0031] (1) Mixing: Mixing is carried out with a rotary circulation mixer, and the fused mullite particles, fused mullite fine powder, carbon, antioxidant and binder are respectively weighed according to the ratio of raw materials. Put the fused mullite particles into the mixer and dry mix for 8 minutes, then add phenolic resin and continue mixing for 10 minutes, then add carbon to it, mix for 10 minutes, finally add fused mullite fine powder and antioxidant and continue mixing for 12 minutes To form mud, the mixer speed is set at 980r / min;

[0032] (2) Compression molding: Add the mixed mud into the mold and use a composite vacuum friction brick press to press and form bricks with a pressure of 3500KN;

[0033] (3) Baking and...

Embodiment 3

[0035] A mullite carbon brick, comprising components by weight percentage: 65% fused mullite particles, 20% fused mullite fine powder, 8% carbon, 4.2% antioxidant, 2.8% binder .

[0036] The preparation method of mullite carbon brick comprises the steps:

[0037] (1) Mixing: Mixing is carried out with a rotary circulation mixer, and the fused mullite particles, fused mullite fine powder, carbon, antioxidant and binder are respectively weighed according to the ratio of raw materials. Put the fused mullite particles into the mixer and dry mix for 10 minutes, then add phenolic resin and continue mixing for 8 minutes, then add carbon to it, mix for 12 minutes, finally add fused mullite fine powder and antioxidant and continue mixing for 12 minutes Form mud material, the speed of mixing machine is set at 970r / min;

[0038] (2) Compression molding: Add the mixed mud into the mold and use a composite vacuum friction brick press to press and form bricks with a pressure of 4000KN;

...

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Abstract

The invention relates to a mullite carbon brick and a preparation method thereof, which belong to the technical field of refractory matter preparation. The mullite carbon brick is prepared from the raw materials: 60 to 75 parts of electro-fused mullite particles, 10 to 30 parts of electro-fused mullite fine powder, 5 to 10 parts of carbon, 1 to 5 parts of antioxidant, and 1 to 3 parts of binding agent. The preparation method comprises the steps of weighing the raw materials according to the raw material ratio, feeding into a mixer for fully mixing, then compression moulding in a brick machine,and finally baking and curing to obtain the mullite carbon brick. The preparation method provided by the invention is simple, the steps are easy to operate, and the mullite particles replace magnesiaparticles, so that the cost increase caused by shortage of magnesia raw materials and price soars is relieved, and meanwhile, excellent performances of erosion resistance and thermal shock resistanceof a magnesia carbon brick are maintained.

Description

technical field [0001] The invention relates to a mullite carbon brick and a preparation method thereof, and relates to the technical field of refractory material preparation. Background technique [0002] Since the late 1970s, the introduction of carbon into refractory materials has caused a revolution in smelting refractory materials represented by magnesia carbon bricks. Due to the full use of the ultra-high melting point of graphite carbon, the advantages of high temperature, high strength and low thermal expansion rate. Carbon-containing refractory products have the advantages of high refractoriness, good slag resistance, strong thermal shock resistance and low high temperature creep, and are widely used in continuous casting systems of steelmaking blast furnaces, electric furnaces, converters, and refining furnaces, with long service life increase in magnitude. At the same time, since most carbon-containing products do not need high-temperature firing, energy saving,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185
CPCC04B35/185C04B35/66C04B2235/422
Inventor 曹丽云龚育才张雪松俞晓东茹红强
Owner 江苏苏嘉集团新材料有限公司
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