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Phenolic resin containing nano-carbon powder, nano-carbon modified low carbon magnesium carbon brick and production method thereof

A technology of nano-carbon powder and phenolic resin, which is applied in the field of low-carbon magnesia-carbon bricks and its preparation, can solve the problems of low thermal conductivity and unintroduced performance indicators, and achieve low carbon content, improved anti-stripping performance, and low thermal expansion coefficient. Effect

Inactive Publication Date: 2010-09-22
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the document, this low-carbon magnesia-carbon brick has a lower thermal conductivity than ordinary magnesia-carbon bricks, but the document does not introduce the specific performance indicators of the brick

Method used

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  • Phenolic resin containing nano-carbon powder, nano-carbon modified low carbon magnesium carbon brick and production method thereof
  • Phenolic resin containing nano-carbon powder, nano-carbon modified low carbon magnesium carbon brick and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, the preparation that contains nano-carbon powder phenolic resin and nano-carbon modified low-carbon magnesia-carbon brick

[0033] 1. Preparation of phenolic resin

[0034] (1) 100 parts by weight of phenol, 112.5 parts by weight of 37% formaldehyde solution and 1.5 parts by weight of polyethylene glycol octylphenyl ether are added to the reaction kettle together, and 20 parts by weight of 30nm average particle diameter are slowly added while stirring. Nano carbon black, disperse for 40 minutes under the action of ultrasonic waves, then keep warm at 40°C and stir for 60 minutes;

[0035] (2) Add 1.0 parts by weight of catalyst NaOH, adjust the pH value to 9, control the temperature to 105°C and keep it warm for 3.0h, and stop the reaction;

[0036] (3) Vacuum dehydration under reduced pressure for 4.0 hours until the viscosity is 5.0 Pa·s, then cooling and discharging to obtain a phenolic resin binder containing nano-carbon black.

[0037] 2. Preparation o...

Embodiment 2

[0044] Example 2: Preparation of phenolic resin containing nano-carbon powder and nano-carbon modified low-carbon magnesia-carbon brick

[0045] 1. Preparation of phenolic resin

[0046] (1) 100 parts by weight of phenol, 120 parts by weight of 37% formaldehyde solution and 1.5 parts by weight of polyvinylpyrrolidone are added together in the reactor, slowly adding 45 parts by weight of nano-graphite with an average particle diameter of 60nm while stirring. Disperse under action for 50 minutes, then keep warm at 60°C and stir for 30 minutes;

[0047] (2) Add 2.0 parts by weight of NaOH, adjust the pH value to 8.5, control the temperature to 100° C. and keep it warm for 2.0 hours to stop the reaction;

[0048] (3) Vacuum dehydration for 2.0 hours until the viscosity is 3.0 Pa·s, cooling and discharging to obtain a phenolic resin binder with evenly dispersed nano-graphite.

[0049] 2. Preparation of low carbon magnesia carbon bricks

[0050] (1) Weigh separately: 100 parts by...

Embodiment 3

[0056] Example 3: Preparation of phenolic resin containing nano-carbon powder and nano-carbon modified low-carbon magnesia-carbon brick

[0057] 1. Preparation of phenolic resin

[0058] (1) 100 parts by weight of phenol, 120 parts by weight of 37% aqueous formaldehyde solution and 1.2 parts by weight of triethanolamine are added to the reactor together, while stirring, slowly add 22 parts by weight of nano-graphite with an average particle diameter of 50 nm, and ultrasonically disperse for 60 minutes , and then the temperature was kept at 50°C and stirred for 30 minutes;

[0059] (2) Add 3.0 parts by weight of NaOH, adjust the pH value to 9.0, control the temperature to 100° C. and keep it warm for 2.0 hours to stop the reaction;

[0060] (3) Vacuum dehydration under reduced pressure for 6.0 hours until the viscosity is 2.0 Pa·s, then cooling and discharging to obtain the nano-graphite phenolic resin binder.

[0061] 2. Preparation of low carbon magnesia carbon bricks

[0...

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Abstract

The invention relates to a low-carbon MgO-C brick containing modified phenolic resin and nanocarbon which are produced by nano carbon powder and a preparation method thereof. Phenolic resin bonding agent containing nano carbon powder is produced by ohenol, formaldehyde, a dispersant and nano carbon powder; the low-carbon MgO-C brick is produced by adopting fused magnesite, graphite, phenolic resin and an antioxidant as raw materials. The ultrasonic dispersion method adopted by the invention replaces partial graphite with the nano carbon powder and leads the nano carbon powder into the low-carbon MgO-C brick, thus obviously improving the anti-erosion ability and the oxidation resistance of the MgO-C brick. The brick has comparatively low thermal expansion coefficient, low thermal conductivity, low oxidative mass loss and thinner decarburized layer; a slag resistance experiment under conditions of 1600 DEG C, 3h heat preservation and carbon sequestration shows that erosion and osmosis phenomenon of the brick are not obvious, thereby being applicable to sites of converters, electric furnaces and ladle working linings, external scouring of furnaces, key components for continuous castings and refractories for blast furnace ironmaking etc., thus having comparatively large application range.

Description

1. Technical field [0001] The invention relates to a magnesia refractory material and a preparation method thereof, in particular to a low-carbon magnesia-carbon brick modified by nano-carbon powder containing phenolic resin and nano-carbon and a preparation method thereof. 2. Background technology [0002] The application history of magnesia refractories is very long, but the thermal expansion coefficient of magnesia bricks is large, and it is easy to peel off during use. Magnesia carbon bricks are developed by adding graphite on the basis of magnesia bricks. Because graphite has a small thermal expansion coefficient and is not easily wetted by slag, it can improve the anti-stripping performance of magnesia-carbon bricks, and can slow down the penetration of slag into the brick and improve its erosion resistance. At present, magnesia carbon bricks have been widely used in converters, electric furnaces, ladles and refining outside the furnace. Since the carbon content of M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/06C08K3/04C04B26/12C04B35/04
Inventor 贾晓林封鉴秋崔全掌陈万仓李大兵
Owner ZHENGZHOU UNIV
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