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High heat conductivity carbon brick for blast furnace and its producing method

A high thermal conductivity, blast furnace technology, applied in blast furnace, blast furnace details, blast furnace parts and other directions, can solve problems such as insufficient thermal conductivity, avoid roasting batch waste, strengthen furnace bottom cooling effect, and reduce costs.

Inactive Publication Date: 2007-03-14
CHENGDU CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The types of blast furnace carbon bricks currently used include ordinary blast furnace carbon bricks, semi-graphitic blast furnace carbon bricks and microporous carbon bricks for blast furnaces, and the thermal conductivity is less than 14W / m.K

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The raw material composition (percentage by weight) of high thermal conductivity carbon bricks for blast furnaces is as follows:

[0030] 40% of the graphite powder produced by the graphitization process and processing process in the production of graphite electrodes; 37% of the roasted powder produced by the roasting process and processing process in the production of blast furnace carbon bricks; 3% of SiC; 20% of coal tar pitch.

[0031] Dry material particle size composition (weight percent) is as follows:

[0032] 16~4mm is 20%; 4~1mm is 30%; 1~0.15mm is 5%; ≤0.15mm is 45%.

Embodiment 2

[0034] The raw material composition (percentage by weight) of high thermal conductivity carbon bricks for blast furnaces is as follows:

[0035] 50% of the graphite powder produced by the graphitization process and processing process in the production of graphite electrodes; 25% of the roasted powder produced by the roasting process and processing process in the production of blast furnace carbon bricks; 1% of SiC; 24% of coal tar pitch.

[0036] Dry material particle size composition (weight percent) is as follows:

[0037] 16~4mm is 30%; 4~1mm is 20%; 1~0.15mm is 10%; ≤0.15mm is 40%.

Embodiment 3

[0039] The raw material composition (percentage by weight) of high thermal conductivity carbon bricks for blast furnaces is as follows:

[0040] 45% of the graphite powder produced by the graphitization process and processing process in the production of graphite electrodes; 30% of the roasted powder produced by the roasting process and processing process in the production of blast furnace carbon bricks; 2% of SiC; 23% of coal tar pitch.

[0041] Dry material particle size composition (weight percent) is as follows:

[0042] 25% for 16-4mm; 25% for 4-1mm; 7% for 1-0.15mm; 43% for ≤0.15mm.

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Abstract

The present invention relates to refractory carbon material for iron smelting blast furnace, and is especially high heat conductivity carbon brick for blast furnace lining and its production process. The high heat conductivity carbon brick for furnace lining has material comprising adhesive 20-24 wt%, crushed graphite 40-50 wt%, roasted segment 25-37 wt% and non-carbon additive 1-3 wt%. The main materials are side products from carbon plant, needs no calcining, and results in low cost. Using great amount of crushed graphite makes the carbon brick possess heat conducting coefficient up to 30 W / m.K, and is favorable to strengthening the furnace bottom cooling effect and prolonging blast furnace life.

Description

Technical field: [0001] The invention mainly relates to a carbonaceous refractory material for an iron-making blast furnace and a manufacturing method thereof, in particular to a high thermal conductivity carbon brick suitable for use as a blast furnace bottom lining and a manufacturing method thereof. Background technique: [0002] The blast furnace is the main equipment for producing molten iron by the iron ore-coke reduction method in large iron and steel complexes. Carbon bricks are used as lining materials for blast furnace hearth and furnace bottom due to their good high temperature strength, excellent slag resistance, good alkali resistance and good thermal conductivity. In recent decades, due to the rapid development of hot repair technology, the blast furnace body can be hot repaired, and the quality of the refractory materials in the furnace body no longer determines the lifetime of the blast furnace. The furnace hearth of the blast furnace cannot be hot repaired ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/52C21B7/04
Inventor 马历乔王登奎向左良
Owner CHENGDU CARBON
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