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Thermal conductive graphite blocks for blast-furnace bottom and hearth

A technology of high thermal conductivity graphite and hearth, applied in blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems such as poor oxidation resistance and small thermal conductivity, achieve low porosity, high compressive and flexural strength, and reduce corrosion and the effect of osmotic erosion

Inactive Publication Date: 2011-03-30
HENAN FANGYUAN CARBON GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by this method is that the existing graphite blocks have low thermal conductivity, poor alkali resistance and oxidation resistance, and a blast furnace bottom with high thermal conductivity, good alkali resistance and oxidation resistance is provided. Hearth with high thermal conductivity graphite block

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The high thermal conductivity graphite block for blast furnace bottom and hearth of the present invention, its raw material is made up of the following components by weight:

[0033] 11 to 15 parts by weight of petroleum coke with a particle size of 2 mm < ≤ 4 mm

[0034] 10 to 14 parts by weight of petroleum coke with a particle size of less than or equal to 1 mm

[0035] 0.075mm

[0036] Petroleum coke with particle size ≤0.075mm 34-40 parts by weight

[0037] Medium temperature asphalt 22-25 parts by weight.

[0038] The preparation method of high thermal conductivity graphite block for blast furnace bottom and hearth of the present invention comprises the following steps:

[0039] (1) Calcination: vacuum calcining petroleum coke at 1300~1350℃ for 30~40min;

[0040] (2) Crushing and batching: the calcined petroleum coke is crushed and sieved into particles with a particle size of 2mm

Embodiment 2

[0047] The high thermal conductivity graphite block for blast furnace bottom and hearth of the present invention, its raw material is made up of the following components by weight:

[0048] 11 parts by weight of petroleum coke with 2mm

[0049] 12 parts by weight of petroleum coke with particle size ≤ 2 mm

[0050] 58 parts by weight of petroleum coke with 0.075mm < particle size ≤ 0.15mm

[0051] Petroleum coke with particle size ≤0.075mm 35 parts by weight

[0052] 22 parts by weight of medium temperature asphalt.

[0053] The preparation method of high thermal conductivity graphite block for blast furnace bottom and hearth of the present invention comprises the following steps:

[0054] (1) calcination: the petroleum coke was calcined in vacuum at 1300 ° C for 40 min;

[0055](2) Crushing and batching: the calcined petroleum coke is crushed and sieved into particles with a particle size of 2mm

Embodiment 3

[0062] The high thermal conductivity graphite block for blast furnace bottom and hearth of the present invention, its raw material is made up of the following components by weight:

[0063] 2mm

[0064] 14 parts by weight of petroleum coke with particle size ≤ 2 mm

[0065] 0.075mm

[0066] Petroleum coke with particle size ≤0.075mm 38 parts by weight

[0067] 23 parts by weight of medium temperature asphalt.

[0068] The preparation method of high thermal conductivity graphite block for blast furnace bottom and hearth of the present invention comprises the following steps:

[0069] (1) calcination: the petroleum coke was calcined in vacuum at 1350 ° C for 30 min;

[0070] (2) Crushing and batching: the calcined petroleum coke is crushed and sieved into particles with a particle size of 2mm

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Abstract

The invention provides thermal conductive graphite blocks for a blast-furnace bottom and a hearth, belonging to the technical field of carbon refractory. The raw materials of the graphite blocks comprise the following components in parts by weight: 11-15 parts of petroleum coke with grain size of more than 2mm and less than or equal to 4mm, 10-14 parts of petroleum coke with grain size of more than 1mm and less than or equal to 2mm, 53-60 parts of petroleum coke with grain seize of more than 0.075mm and less than or equal to 0.15mm, 34-40 parts of petroleum coke with grain seize of less than or equal to 0.075mm, and 22-25 parts of mesothermal asphalt. In the formula of the thermal conductive graphite blocks for the blast-furnace bottom and the hearth, high-quality needle cokes with higherintensity and easy graphitization are used, a small grain formula is adopted, and a high-pressure multi-soaking and multi-baking method is adopted, so that an impregnant can penetrate through the holes of the graphite blocks, thus reducing the porosity of the graphite blocks, improving the compactness, volume density and intensity of the products, improving the coefficient of heat conductivity and alkali-resistant corrodibility of the graphite blocks greatly, fundamentally solving the problem of low coefficient of heat conductivity of the graphite blocks, and meeting the requirement on quality of the graphite blocks with high thermal conductivity for large blast furnaces.

Description

technical field [0001] The invention belongs to the technical field of carbonaceous refractory materials, and in particular relates to a high thermal conductivity graphite block for the bottom and hearth of a blast furnace. Background technique [0002] After the inner lining of the same blast furnace is matched with a variety of materials, the life of the blast furnace is significantly prolonged. Among them, the graphite block is suitable for the bottom layer of the blast furnace bottom and the hearth to build the cooling stave. Using its high thermal conductivity, it can strengthen the cooling of the furnace bottom and the hearth, reduce the temperature of the furnace bottom and the brick lining of the hearth, and prolong the life of the furnace lining. During the operation of the blast furnace, the bottom and hearth of the blast furnace are subject to chemical erosion for a long time, the flow of molten iron scours the carbon bricks, the oxidation of the carbon bricks, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52C04B35/66C04B35/622C21B7/06
Inventor 李健伟石欣肖伟
Owner HENAN FANGYUAN CARBON GRP
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