A kind of carbon anode and its preparation method and application

A carbon anode and mixing technology, applied in the field of carbon industry, can solve the problems of reducing product yield, polluting the environment, complex process, etc., and achieve the effect of improving structure compactness, reducing process, and reducing process steps

Active Publication Date: 2020-02-04
SHANDONG SHENGQUAN NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of coal tar pitch as a binder will release harmful substances such as sulfur dioxide at high temperatures, pollute the environment, and reduce product yields
[0003] Moreover, in the process of using coal tar pitch to prepare the anode, the temperature during molding is about 145°C. After molding, it needs to be put into water, water-cooled to improve the strength, and then roasted for 20-30 days to prepare the finished anode. The process is complicated and the pass rate is low. and serious pollution

Method used

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  • A kind of carbon anode and its preparation method and application
  • A kind of carbon anode and its preparation method and application
  • A kind of carbon anode and its preparation method and application

Examples

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Embodiment 1

[0050] This embodiment provides a method for preparing a carbon anode, comprising the following steps:

[0051] (a) Aggregate preparation: Weigh 15 parts of 0-1mm petroleum coke, 20 parts of 1-2mm petroleum coke, 30 parts of 2-4mm petroleum coke, 20 parts of 4-8mm petroleum coke, 30 parts of 180 mesh fine powder petroleum coke, 7 parts of crushed graphite and 3 parts of carbon nanotubes were put into a mixer and mixed evenly.

[0052] (b) Preparation of asphalt modified phenolic resin: 200 parts of phenol, 329 parts of 37% formaldehyde, and 4 parts of catalyst are put into the reaction bottle, and the temperature is raised to 73-75° C., and 10 parts of asphalt powder and 10 parts of 50% formaldehyde are taken. Mix the sodium hydroxide solution evenly and put it into the reaction bottle; after constant temperature for 2 hours, dehydrate under reduced pressure until the viscosity is 12000cp / 25°C, add 2 parts of ferric chloride and 4 parts of boric acid to obtain the required res...

Embodiment 2

[0057] This embodiment provides a method for preparing a carbon anode, comprising the following steps:

[0058] (a) Aggregate preparation: Weigh 20 parts of 0-1mm petroleum coke, 20 parts of 1-2mm petroleum coke, 20 parts of 2-4mm petroleum coke, 15 parts of 4-8mm petroleum coke, 30 parts of 180 mesh fine powder petroleum coke, 5 parts of crushed graphite and 5 parts of carbon nanotubes were put into a mixer and mixed evenly.

[0059] (b) Preparation of lignin-modified phenolic resin: put 300 parts of phenol, 429 parts of 37% formaldehyde, and 6 parts of catalyst into the reaction bottle, heat up to 73-75 ° C, keep the temperature for 2 hours, add lignin, and dehydrate under reduced pressure to The viscosity is 8000cp / 25°C, adding 5 parts of iron oxide powder and 4 parts of boric acid, the desired resin is obtained, and the resistivity of the resin carbonized powder is 44mΩ·cm.

[0060] (c) Mix 90 parts of aggregate obtained in step (a), 10 parts of modified phenolic resin ob...

Embodiment 3

[0064] This embodiment provides a method for preparing a carbon anode, comprising the following steps:

[0065] (a) Aggregate preparation: Weigh 20 parts of 0-1mm petroleum coke, 15 parts of 1-2mm petroleum coke, 15 parts of 2-4mm petroleum coke, 15 parts of 4-8mm petroleum coke, 25 parts of 180 mesh fine powder petroleum coke, 15 parts of anthracite, 5 parts of crushed graphite, put into a mixer and mix evenly.

[0066] (b) Preparation of tar-modified phenolic resin: put 200 parts of phenol, 20 parts of tar, and 4 parts of catalyst into the reaction bottle, raise the temperature to 83-85 ° C, and drop 300 parts of 37% formaldehyde into the reaction bottle; keep the temperature for 2 hours Finally, add 6 parts of potassium chromium oxalate trihydrate and 4 parts of boric acid, and dehydrate under reduced pressure to a viscosity of 14000 cp / 25°C to obtain the desired resin. The resistivity of the resin carbide powder is 62 mΩ·cm.

[0067] (c) Mix 90 parts of aggregate obtained...

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Abstract

The invention provides a carbon anode and a preparation method and an application thereof, and belongs to the technical field of carbon industries. The carbon anode comprises the following raw materials: 85-95 parts of aggregate and 5-15 parts of a binder. The preparation method comprises the following steps: mixing the raw materials according to a mass proportion, forming, and performing heat treatment, to obtain the carbon anode. The binder is capable of using liquid phenolic resin as a main body. Compared with a binder of asphalt, mixing in a normal temperature can be realized, a forming technology adopts compression molding, the technology is simple, and operation conditions are moderate. After the phenolic resin is used for heating and solidifying, the carbon anode has the characteristics of excellent dimensional stability, and is capable of realizing rapid warming in a roasting stage, shortening roasting time, and improving production efficiency.

Description

technical field [0001] The invention relates to the technical field of carbon industry, in particular to a carbon anode and its preparation method and application. Background technique [0002] Prebaked anode is an anode material used in the electrolytic aluminum industry. It is used for electrolytic alumina to produce metal aluminum and is an important raw material for the electrolytic alumina industry. At present, the main raw material of the anode is petroleum coke, which is combined with coal tar pitch and made by forming and roasting. However, if coal tar pitch is used as the binder, harmful substances such as sulfur dioxide will be released at high temperature, which will pollute the environment and reduce the product yield. [0003] Moreover, in the process of using coal tar pitch to prepare the anode, the temperature during molding is about 145°C. After molding, it needs to be put into water, water-cooled to improve the strength, and then roasted for 20-30 days to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/532C04B35/83C04B35/622C25C3/12
CPCC04B35/532C04B35/622C04B35/83C04B2235/425C04B2235/5288C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607C25C3/125
Inventor 徐传伟李枝芳马庆刘卫新
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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