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Water-bound magnesia carbon brick and preparation method thereof

A magnesia-carbon brick and carbon technology, which is applied in the field of water-bonded magnesia-carbon brick and its preparation, can solve problems such as environmental pollution and health injuries of production workers, and achieve the advantages of easy operation of the preparation method, reduction of health injuries, and reduction of pollutants The effect of emissions

Inactive Publication Date: 2018-06-12
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

Organic binders such as phenolic resins contain toxic and harmful substances. Whether in the production and use of binders or magnesia carbon bricks, there will be inevitable environmental pollution, volatile harmful substances, and certain harm to the health of production workers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A water-bonded magnesia-carbon brick, comprising components by weight: 75 parts of fused magnesia particles, 17 parts of fused magnesia fine powder, 3 parts of carbon, 1 part of antioxidant aluminum powder, and 2 parts of starch , 2 parts of sodium hexametaphosphate, 2 parts of water.

[0023] The preparation method of the water-bonded magnesia carbon brick: comprises the steps:

[0024] (1) Mixing: Mixing is carried out with a rotary circulating mixer, and the raw materials are weighed respectively according to the ratio of fused magnesia particles, fused magnesia fine powder, carbon, antioxidant aluminum powder, starch, hexametaphosphoric acid Sodium and water, first put the fused magnesia granules, starch, and sodium hexametaphosphate in a rotary rotary mixer for 5 minutes, then add water and continue mixing for 8 minutes, then add carbon and mix for 8 minutes, and finally add electric Fused magnesia fine powder and antioxidant aluminum powder were mixed for 8 minut...

Embodiment 2

[0028] A water-bonded magnesia-carbon brick, comprising components in parts by weight: 79 parts of fused magnesia particles, 12 parts of fused magnesia fine powder, 4 parts of carbon, 2 parts of antioxidant aluminum powder, and 1 part of starch , 2 parts of sodium hexametaphosphate, 2.5 parts of water.

[0029] The preparation method of the water-bonded magnesia carbon brick: comprises the following steps

[0030] (1) Mixing: Mixing is carried out with a rotary circulating mixer, and the raw materials are weighed respectively according to the ratio of fused magnesia particles, fused magnesia fine powder, carbon, antioxidant aluminum powder, starch, hexametaphosphoric acid Sodium and water, first place the fused magnesia granules, starch, and sodium hexametaphosphate in a rotary rotary mixer for 8 minutes of dry mixing, then add water and continue mixing for 10 minutes, then add carbon and mix for 12 minutes, and finally add electric Fused magnesia fine powder and antioxidant ...

Embodiment 3

[0034] A water-bonded magnesia-carbon brick, comprising components in parts by weight: 80 parts of fused magnesia particles, 10 parts of fused magnesia fine powder, 2 parts of carbon, 3 parts of antioxidant metal silicon powder, and 2 parts of starch Parts, 3 parts of sodium hexametaphosphate, 2 parts of water.

[0035] The preparation method of the water-bonded magnesia carbon brick: comprises the steps:

[0036] (1) Mixing: Mixing is carried out with a rotary circulation mixer, and the raw materials are weighed according to the ratio of fused magnesia particles, fused magnesia fine powder, carbon, antioxidant metal silicon powder, starch, hexadecimal Sodium phosphate and water, first place the fused magnesia granules, starch, and sodium hexametaphosphate in a rotary rotary mixer for 10 minutes of dry mixing, then add water and continue mixing for 12 minutes, then add carbon and mix for 12 minutes, and finally add Fused magnesia fine powder and antioxidant metal silicon powd...

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Abstract

The invention relates to a water-bound magnesia carbon brick and a preparation method thereof and belongs to the technical field of refractory materials. The water-bound magnesia carbon brick comprises 60-85 parts of fused magnesite grain, 10-35 parts of fused magnesite fine powder, 1-20 parts of carbon, 1-5 parts of antioxidant, 1-5 parts of starch, 1-5 parts of sodium hexametaphosphate and 2-4 parts of water. The preparation method includes: weighing the above raw materials proportionally, sufficiently mixing, pressing for forming, and roasting to obtain the water-bound magnesia carbon brick. The preparation method is simple and easy to operate, pollutant emission is reduced, and health damage to production workers is lowered. The starch, sodium hexametaphosphate and the water which arebinding agents used in the process of production are all inorganic binding agents, so that no harmful substance is volatilized, and original performance of magnesia carbon bricks produced through organic binding of phenolic resin is maintained.

Description

technical field [0001] The invention relates to a water-bonded magnesia-carbon brick and a preparation method thereof, and relates to the technical field of refractory material preparation. Background technique [0002] The melting point of magnesium oxide is 2800°C, which has strong high temperature resistance, but its thermal shock resistance and slag resistance are poor; carbon materials represented by graphite also have strong high temperature resistance, and their thermal expansion coefficient is low , The thermal shock resistance is very excellent, and it is not easy to infiltrate with molten steel and steel slag at high temperature. The two are compounded in a certain proportion to form a refractory material with good comprehensive performance - magnesia carbon brick. Due to its excellent corrosion resistance and thermal shock resistance, magnesia carbon bricks are still widely used as lining materials in various steelmaking furnaces, such as converters, steelmaking e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043C04B35/636C04B35/63C04B35/622
CPCC04B35/043C04B35/622C04B35/6313C04B35/636C04B2235/402C04B2235/425
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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