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Composite converter magnesia-carbon brick and preparation method thereof

A converter magnesia-carbon brick and magnesia-carbon brick technology, which is applied in the field of refractory materials, can solve the problems of large difference in mud performance and strength, magnesia-carbon brick breakage, cracks, etc., and achieve improved oxidation resistance and slag erosion resistance , reduce destructive power, ensure the effect of high temperature resistance

Inactive Publication Date: 2019-11-08
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the converter magnesia-carbon brick disclosed in this patent application adopts step forming, and the performance and strength of the two parts of the mud are quite different, and cracks are likely to appear at the interface, resulting in fracture and shedding of the magnesia-carbon brick during use. Affect

Method used

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  • Composite converter magnesia-carbon brick and preparation method thereof

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preparation example Construction

[0041] The invention also discloses a preparation method of a composite converter magnesia-carbon brick, which comprises the following steps:

[0042] 1) Weigh fused magnesia particles, fused magnesia fine powder, carbonaceous raw materials, antioxidants, and binders according to the ratio of each raw material described in part A, mix them evenly, and discharge for later use;

[0043] 2) Weigh fused magnesia particles, fused magnesia fine powder, regenerated magnesia-carbon bricks, carbonaceous raw materials, and binder according to the ratio of each raw material described in part B, mix them evenly, and discharge for later use;

[0044] 3) Weigh the regenerated magnesia-carbon brick particles, regenerated magnesia-carbon brick powder, and binder according to the ratio of each raw material described in part C, mix them evenly, and discharge them for later use;

[0045] 4) Place baffles in the mold to divide the cavity of the mold into three parts, each part correspondingly pla...

Embodiment 1

[0049] This embodiment discloses a preparation method of a composite converter magnesia-carbon brick, which includes taking 50 parts of raw materials for part A, 40 parts of raw materials for part B, and 10 parts of raw materials for part C in stepwise molding, pressing and drying.

[0050] Wherein, the A part includes the following raw material components in parts by mass: fused magnesia particles: 65 parts, fused magnesia fine powder: 15 parts, graphite and carbon black composite powder: 13 parts, graphite modified Phenolic resin: 4 parts, metal aluminum powder and silicon powder: 3 parts; and 30 parts of magnesia with a particle size of 5-3 mm in the fused magnesia particles, 40 parts of magnesia with a particle size of 3-1 mm, and a particle size of 1-0.088 30 parts of magnesia in mm;

[0051] The B part includes the following raw material components in parts by mass: fused magnesia particles: 10 parts, fused magnesia fine powder: 20 parts, regenerated magnesia-carbon bric...

Embodiment 2

[0054] This embodiment discloses a preparation method of a composite converter magnesia-carbon brick, which includes taking 40 parts of raw materials for part A, 30 parts of raw materials for part B, and 30 parts of raw materials for part C, which are formed by step forming, pressing and drying.

[0055] Wherein, the A site includes the following raw material components in parts by mass: fused magnesia particles: 65 parts, fused magnesia fine powder: 15 parts, graphite and nano-carbon fiber composite powder: 13 parts, graphite modified Phenolic resin: 4 parts, metal aluminum powder and silicon powder: 3 parts; and 30 parts of magnesia with a particle size of 5-3 mm in the fused magnesia particles, 40 parts of magnesia with a particle size of 3-1 mm, and a particle size of 1-0.088 30 parts of magnesia in mm;

[0056] The B part includes the following raw material components in parts by mass: fused magnesia particles: 10 parts, fused magnesia fine powder: 20 parts, regenerated m...

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Abstract

The invention discloses a composite converter magnesia-carbon brick and a preparation method thereof, and belongs to the technical field of steel making. The magnesia-carbon brick comprises an A part,a C part, and a B part positioned between the A part and the C part; one side surface of the B part is serrated and is tightly engaged with one side surface of the A part, and the other side surfaceof the B part is also serrated and is tightly engaged with one side surface of the C part. The part A is used as a working layer, wherein a high-quality fused magnesia raw material is adopted to forma stable internal network structure with a carbonaceous raw material and a bonding agent, so that integral high-temperature resistance of the magnesia-carbon brick is improved; the B part is used as atransition between the working layer and a non-working area, wherein a high-quality fused magnesia raw material and regenerated magnesia carbon bricks are adopted, so that integral high-temperature resistance of the magnesia-carbon brick is ensured; and the C part is used as a non-working area, wherein the whole C part is prepared by regenerated magnesia-carbon bricks are adopted, so that production cost is reduced. The composite converter magnesia-carbon brick is suitable for popularization and use by enterprises.

Description

technical field [0001] The invention relates to a refractory material, which belongs to the technical field of steelmaking, in particular to a composite converter magnesia-carbon brick and its preparation method and application. Background technique [0002] Steelmaking converter is a vertical cylindrical furnace that mainly uses liquid pig iron as raw material for steelmaking without external heat source. Its main features are: relying on the physical heat of the liquid pig iron in the converter and the heat generated by the chemical reaction of various components in the pig iron (such as carbon, manganese, silicon, phosphorus, etc.) Ingredients and temperature required. According to the properties of lining refractories, it can be divided into two types: acidic converter and basic converter; according to the position where the gas is blown into the furnace, the converter is divided into bottom blowing, top blowing, side blowing and top-bottom composite blowing converter. ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/043C04B35/634C04B35/622C04B35/80C21C5/44
CPCC04B35/043C04B35/62204C04B35/63476C04B35/66C04B35/80C04B2235/402C04B2235/424C04B2235/425C04B2235/428C04B2235/9676C21C5/44Y02P10/20
Inventor 蔡长秀雷中兴孙枫谭喜阳徐志华
Owner WUGANG REFRACTORY CO LTD
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