Micro-expansion pressed-in charcoal adhesive and preparation process thereof

A micro-expanded and expanded graphite technology, applied in the field of ferroalloy electric furnace sealing carbon glue and blast furnace, can solve the problems of accelerating the damage of the furnace lining, hindering the heat transfer of the furnace lining, increasing the temperature of the furnace lining, etc., and achieving the effect of excellent sealing performance and excellent filling performance.

Inactive Publication Date: 2013-08-07
叶乐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gaps form a network structure and are connected to each other. Under production conditions, high-temperature gas fills the gaps, which seriously hinders the heat transfer from the furnace lining to the cooling equipment or the furnace shell, causing the internal temperature of the furnace lining to rise, accelerating the damage of the furnace lining, and endangering the safe production of the furnace. and longevity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, the expansion press-in charcoal gel is in kg, and the weight of each component is:

[0024] Expanded graphite 65, aluminum powder 5, tar 10, thermoplastic phenolic resin 20. By mixing these four components, it becomes a micro-expansion pressed-in carbon gel.

[0025] The carbon glue made according to this ratio has a thermal conductivity of 15.3W / m?k, a volume expansion rate of 10%, and a plastic deformation of 11%.

Embodiment 2

[0027] In this embodiment, the expansion press-in charcoal gel is in kg, and the weight of each component is:

[0028] Expanded graphite 50, aluminum powder 10, tar 15, thermoplastic phenolic resin 25. By mixing these four components, it becomes a micro-expansion pressed-in carbon gel.

[0029] The thermal conductivity of the carbon glue made according to this ratio reaches 13.6 W / m?k, the volume expansion rate is 8.9%, and the plastic deformation is 9.1%.

Embodiment 3

[0031] In this embodiment, the expansion press-in charcoal gel is in kg, and the weight of each component is:

[0032] Expanded graphite 45 , aluminum powder 3 , tar 25 , thermoplastic phenolic resin 27 . By mixing these four components, it becomes a micro-expansion pressed-in carbon gel.

[0033] The thermal conductivity of the carbon glue made according to this ratio reaches 10.8W / m?k, the volume expansion rate is 5.6%, and the plastic deformation is 6.1%.

[0034] The above-mentioned expansion of the present invention is pressed into each index of charcoal gel as follows:

[0035] 1) Excellent flow performance: it can flow into pores below 0.05mm under the action of external force.

[0036] 2) Excellent filling performance: it can effectively fill the gap below 3mm.

[0037] 3) Excellent sealing performance: under the conditions of blast furnace and ferroalloy electric furnace smelting, gas does not penetrate.

[0038] 4) Excellent micro-expansion performance: the volum...

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PUM

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Abstract

The invention relates to a sealing charcoal adhesive used in blast furnace and ferroalloy electric furnace, and especially relates to a micro-expansion pressed-in charcoal adhesive applied between a blast furnace bottom hearth and a cooling device, and between a ferroalloy electric furnace graphite lining and furnace housing. The charcoal adhesive comprises the raw materials of, by weight, 45-65 parts of expansion graphite, 5-25 parts of tar, 1-10 parts of aluminum powder, and 3-30 parts of thermoplastic phenolic resin. During long-time application in blast furnace and electric furnace low-temperature sections, heat can be effectively conducted, in-furnace coal gas communication can be prevented, furnace lining cooling capacity can be improved, charcoal brick lining corrosion speed can be reduced, and entire furnace lining service life can be prolonged.

Description

technical field [0001] The invention relates to a sealing carbon glue for blast furnaces and ferroalloy electric furnaces, in particular to a micro-expansion pressed carbon glue suitable for use between the hearth of the blast furnace bottom and cooling equipment, between the graphite lining of the ferroalloy electric furnace and the furnace shell . Background technique [0002] Blast furnaces and ferroalloy electric furnaces are indispensable large-scale smelting equipment in the metallurgical industry. The life of the furnace bottom and hearth lining determines the life of a generation of furnace service. Generally, the service life of the first generation of large-scale blast furnaces is 8 to 12 years, and the service life of the first generation of electric furnaces for smelting ferromanganese, ferronickel, and ferrochrome alloys is 0.5 to 3 years. [0003] With the advancement of science and technology, in order to realize the large-scale blast furnace and ferroalloy e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 叶乐景延明陈群涛李伟肖国正余万德李大红姜浩杜建超韩小珍岳向旭李福兴
Owner 叶乐
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