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Dolomite non-burning carbon brick and preparation method thereof

A technology of dolomite and carbon bricks is applied in the field of new dolomite non-burning carbon bricks and their preparation, which can solve the problem that the hydration resistance needs to be improved, so as to improve the hydration resistance, improve the life of the furnace lining and prevent water the effect of

Inactive Publication Date: 2013-03-13
营口鲅鱼圈耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese invention patent with the publication number CN1800083A discloses a hydration-resistant dolomite fired brick and its manufacturing process; these two patent applications have proposed technical solutions to the problem of hydration resistance, but their hydration resistance still needs to be solved. to improve

Method used

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  • Dolomite non-burning carbon brick and preparation method thereof
  • Dolomite non-burning carbon brick and preparation method thereof
  • Dolomite non-burning carbon brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A dolomite non-fired carbon brick, which uses calcined synthetic high-iron dolomite that is not broken after leaving the kiln as aggregate, and in the calcined synthetic high-iron dolomite, Fe 2 o 3 5-10% by weight, and 20-40% by weight of CaO; the dolomite non-fired carbon brick is made of the following raw materials in proportion by weight:

[0027] Calcination to synthesize high-iron dolomite 3mm~5mm 26

[0028] Calcination to synthesize high-iron dolomite 1mm~3mm 28

[0029] Fused magnesia 0.088mm~1mm 20

[0030] Fused magnesia ≤0.088mm 10

[0031] Graphite 8

[0032] Aluminum powder 2

[0033] Silica fume 2

[0034] asphalt 2

[0035] Phenolic resin 2.

[0036] The method of calcining and synthesizing high-iron dolomite is as follows: use natural dolomite ore, lightly burn at 900°C-1200°C to obtain lightly burnt dolomite, add iron oxide red to the digested dolomite, oxidize The amount of iron red added is 5-10% of the total weight; then artificial granulat...

Embodiment 2

[0042]A dolomite non-fired carbon brick, which uses calcined synthetic high-iron dolomite that is not broken after leaving the kiln as aggregate, and in the calcined synthetic high-iron dolomite, Fe 2 o 3 5-10% by weight, and 20-40% by weight of CaO; the dolomite non-fired carbon brick is made of the following raw materials in proportion by weight:

[0043] Calcined synthetic high-iron dolomite 3mm~5mm 28

[0044] Calcination to synthesize high-iron dolomite 1mm~3mm 25

[0045] Fused magnesia 0.088mm~1mm 18

[0046] Fused magnesia ≤0.088mm 12

[0047] Graphite 11

[0048] Aluminum powder 1

[0049] Silica fume 1

[0050] asphalt 2

[0051] Phenolic resin 2.

[0052] The method for calcining and synthesizing high-iron dolomite is as follows: use natural dolomite ore, lightly burn at a temperature of 900°C-1200°C to obtain lightly burnt dolomite, and add dolomite with a particle size of ≤0.088mm to the digested dolomite. The magnesia fine powder is mixed evenly, and the...

Embodiment 3

[0055] A dolomite non-fired carbon brick, which uses calcined synthetic high-iron dolomite that is not broken after leaving the kiln as aggregate, and in the calcined synthetic high-iron dolomite, Fe 2 o 3 5-10% by weight, and 30-55% by weight of CaO; the dolomite non-fired carbon brick is made of the following raw materials in proportion by weight:

[0056] Calcined synthetic high-iron dolomite 3mm~5mm 30

[0057] Calcination to synthesize high-iron dolomite 1mm~3mm 26

[0058] Fused magnesia 0.088mm~1mm 22

[0059] Fused magnesia ≤0.088mm 15

[0060] graphite 5

[0061] Aluminum powder 4

[0062] Silicon fume 3

[0063] asphalt 5

[0064] Phenolic resin 4.

[0065] The method for calcining and synthesizing high-iron dolomite is as follows: use natural dolomite ore, lightly burn at a temperature of 900°C-1200°C to obtain lightly burnt dolomite, and add dolomite with a particle size of ≤0.088mm to the digested dolomite. The magnesia fine powder is mixed evenly, and th...

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Abstract

The invention relates to a dolomite non-burning carbon brick and a preparation method thereof. In the invention, calcined synthetic high-iron dolomite which is not cracked after kiln discharge is used as the aggregate, wherein the weight percentage of Fe2O3 is 5-10%, and the weight percentage of CaO is 20-55%. The dolomite non-burning carbon brick is prepared from the following raw materials in parts by weight: 26-30 parts of calcined synthetic white high-iron dolomite (3-5mm), 25-28 parts of calcined synthetic dolomite (1-3mm), 18-22 parts of fused magnesite (0.088-1mm), 10-15 parts of fused magnesite (<=0.088mm), 1-4 parts of aluminum powder, 5-15 parts of graphite, 1-3 parts of silicon powder, 2-5 parts of asphalt and 2-4 parts of phenolic resin. The preparation method comprises the procedures of premixing, mulling, blank compacting and heat treatment. By using the calcined synthetic high-iron dolomite which is not cracked after kiln discharge as the aggregate, the invention prepares the dolomite non-burning carbon brick having high waterproofing performance and low price.

Description

technical field [0001] The invention relates to the technical field of unfired carbon bricks used in the iron and steel metallurgy industry, in particular to a novel dolomite unfired carbon brick and a preparation method thereof. Background technique [0002] CaO has the function of purifying molten steel, and its role in smelting high-quality steel such as stainless steel, pure steel and low-sulfur steel is being paid more and more attention by people. In addition, CaO also has unique chemical stability, and CaO can coexist with C at a higher temperature than MgO. For example, when smelting high-grade car plate IF steel with extremely low total impurity content, it is required that the smelting must be under high vacuum conditions to meet the target requirements, that is, when the vacuum degree reaches 67Pa (about 0.5 Torr), the refining task can be realized and completed. Under the condition of such a high vacuum degree, the reaction temperature of MgO and C drops to abou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 周清德周晨光
Owner 营口鲅鱼圈耐火材料有限公司
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