High-temperate and high-strength carbon daub

A high-strength, carbon-based technology, applied in the field of adhesives, can solve problems such as hearth damage, ablation, and extravasation, and achieve the effect of prolonging service life and high strength

Active Publication Date: 2012-07-25
河南远洋新材料技术有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] When traditionally building ironmaking blast furnace hearths, the binder used between carbon bricks is generally prepared by mixing phenolic resin and carbon powder. Due to the poor high temperature resistance of this binder, when the blast furnace temperature rises When the temperature is above 1000°C, the binder will be ablated at high temperature, and the molten iron will seep out from between the carbon bricks, destroying the hearth and affecting the service life of the blast furnace

Method used

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Embodiment Construction

[0015] The high-temperature high-strength carbon cement of the present invention is prepared from raw materials anthracite, artificial graphite powder, comprehensive additives and liquid resin according to the following proportions by weight and method:

[0016] The first step is to treat the purchased anthracite (ash <6%, volatile matter = 6-8%, moisture <5%) in a graphitization furnace at 2300°C for 24 hours, and then crush it to 100 mesh graphitized anthracite after natural cooling powder spare;

[0017] In the second step, the above prepared graphitized anthracite coal powder, graphite powder with a particle size of 100 mesh (ash content less than 0.5%, resistivity <200μΩm) and comprehensive additives (novolac resin, rosin or hexamethylenetetramine, etc.) are graphitized Anthracite coal powder: graphite powder: comprehensive additive=40±10:30±10:30±10 weight proportions are uniformly mixed into powder (wherein the preferred ratio among the three is graphitized anthracite c...

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Abstract

The invention discloses a high-temperate and high-strength carbon daub, which is prepared from raw material anthracite, artificial graphite powder, comprehensive additive and liquid resin with the following method in the following steps of: firstly, processing the anthracite at high temperature in a graphitization furnace, and breaking into powder after the anthracite is cooled; evenly mixing thegraphitized anthracite, the graphite powder and the comprehensive additive at the mass ratio of 40+ / -10:30+ / -10:30+ / -10 into powder material; evenly stirring the powder material and the liquid resin at the ratio of 3:1; and standing and defoaming for 1 hour to obtain a finished product. The high-temperate and high-strength carbon daub has the advantages of high strength; when the temperature reaches 850 DEG C, the strength is only 6-8MPa; when the temperature rises to the 1150 DEG C, molten iron in the hearth of a blast furnace tends to the melting state, and the strength of the carbon daub disclosed by the invention is still maintained at 6-8MPa; when the temperature reaches 1600 DEG C, the strength of the carbon daub disclosed by the invention is maintained at 6-8MPa, and the molten iron does not ooze from carbon brick gaps so as to prevent from damaging the hearth; and the service life of the hearth is prolonged.

Description

technical field [0001] The invention relates to a binder, in particular to a high-temperature and high-strength carbon cement used for masonry iron-making blast furnace carbon bricks. Background technique [0002] When traditionally building ironmaking blast furnace hearths, the binder used between carbon bricks is generally prepared by mixing phenolic resin and carbon powder. Due to the poor high temperature resistance of this binder, when the blast furnace temperature rises When the temperature is above 1000°C, the binder will be ablated at high temperature, and the molten iron will seep out from between the carbon bricks, destroying the hearth and affecting the service life of the blast furnace. Contents of the invention [0003] The object of the present invention is to provide a high-temperature high-strength carbon cement, which can prolong the service life of a blast furnace for more than two years when used as a masonry hearth binder. [0004] To achieve the above...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 白周京向左良刘欣荣白海钦孟轲白吉康
Owner 河南远洋新材料技术有限公司
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