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Graphite material for producing nanogate carbon and preparation method thereof

A graphite material and nano-carbon technology, applied in the field of graphite materials, can solve the problem that the bulk density, purity and resistivity cannot meet the requirements of use, the performance and scale cannot meet the market demand at the same time, and the production technology of isostatic graphite products is immature, etc. problems, to achieve the effect of shortening the production cycle, speeding up the excitation speed, improving the bulk density and mechanical properties

Inactive Publication Date: 2011-10-12
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the following reasons, isostatic graphite materials are not suitable for large-scale industrial production: 1. The price of needle coke used in the production of isostatic graphite products is high, and the preparation process of isostatic graphite products is complicated and technically difficult. All of these lead to the extremely high cost of isostatic graphite products
2. The production technology of domestic isostatic graphite products is still immature, only a few manufacturers can produce some low-end and small-sized products, and high-end large-size isostatic graphite products need to be imported from abroad
[0006] At present, the graphite materials produced in the domestic market either fail to meet the requirements for use in important parameters such as bulk density, purity, and resistivity, or can only be produced in small-scale and small-scale production, and cannot meet the market in terms of performance and scale. need

Method used

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  • Graphite material for producing nanogate carbon and preparation method thereof
  • Graphite material for producing nanogate carbon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] After the calcined petroleum coke is crushed and sieved, it is made into three grades of pellets of 1-0.5mm, 0.5-0.075mm and powder (particle size less than 0.075mm), which are placed in three silos respectively; pitch coke After being crushed and sieved, it is made into powder, stored in the silo, and then the calcined petroleum coke and pitch coke are proportioned (85:15) through electronic batching; the calcined petroleum coke is divided into 1 -0.5mm accounts for 20%, 0.5-0.075mm accounts for 35%, and powder accounts for 45% for proportioning.

[0047] Put the above-mentioned mixture into a kneading pot for dry mixing, the dry mixing time is 20 minutes, and the temperature of the dry material is 120°C.

[0048] Add modified asphalt to the kneading pot for wet mixing, the mass percentage of dry material and modified asphalt is 75:25, wherein the modified asphalt is added in two times, the first addition is 45% of the total modified asphalt, Kneading with the dry mat...

Embodiment 2

[0055] After the calcined petroleum coke is crushed and sieved, it is made into three grades of pellets of 1-0.5mm, 0.5-0.075mm and powder (particle size less than 0.075mm), which are placed in three silos respectively; pitch coke After being crushed and sieved, it is made into powder, stored in the silo, and then the calcined petroleum coke and pitch coke are proportioned (90:10) through electronic batching; the calcined petroleum coke is divided into 1 -0.5mm accounts for 25%, 0.5-0.075mm accounts for 35%, and powder accounts for 40% for proportioning.

[0056] Put the above mixed materials into a kneading pot for dry mixing, the dry mixing time is 30 minutes, and the temperature of the dry materials is 130°C.

[0057] Add modified asphalt to the kneading pot for wet mixing, the mass percentage of dry material and modified asphalt is 80:20, wherein the modified asphalt is added in two times, the first addition is 50% of the total modified asphalt, Kneading with the dry mate...

Embodiment 3

[0064] After the calcined petroleum coke is crushed and sieved, it is made into three grades of pellets of 1-0.5mm, 0.5-0.075mm and powder (particle size less than 0.075mm), which are placed in three silos respectively; pitch coke After crushing and screening, it is made into powder, stored in the silo, and then the calcined petroleum coke and pitch coke are mixed according to (88:12) through electronic batching; the calcined petroleum coke is divided into 1 -0.5mm accounts for 25%, 0.5-0.075mm accounts for 30%, and powder accounts for 45% for proportioning.

[0065] Put the above mixed materials into a kneading pot for dry mixing, the dry mixing time is 25 minutes, and the temperature of the dry materials is 125°C.

[0066] Add modified asphalt to the kneading pot for wet mixing, the mass percentage of dry material and modified asphalt is 77:23, wherein the modified asphalt is added in two times, the first addition is 55% of the total modified asphalt, Kneading with the dry ...

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Abstract

The invention discloses a high-volume density fine particle graphite material for producing nanogate carbon and a preparation method thereof. The preparation method mainly comprises the following steps of: crushing, screening and electronically batching; adding tar coke for dry mixing and adding modified asphalt for wet mixing; and vibrating for forming, primarily roasting, primarily impregnating, secondarily roasting, graphitizing and machining to obtain the finished product. On the basis of the prior art, by optimizing the process formula and a key technology according to the use requirement, the preparation method can be used for producing the high-volume density fine particle graphite material for producing nanogate carbon. The graphite material has the characteristics of high purity,high volume density, small particle, low resistivity, uniform and delicate structure, certain mechanical strength and the like.

Description

Technical field: [0001] The invention relates to a graphite material, in particular to a graphite material for producing nano-carbon and a manufacturing method thereof. Background technique: [0002] Due to its special properties, nano-carbon is widely used in electric heating materials, battery manufacturing, magnetic recording materials, agriculture, aviation, aerospace and other fields, and the market demand is large. CN1579932A and CN1579933A have realized the nano-carbon through the pulse electrode method. High-efficiency industrial production in large quantities. The pulsed electrode method uses high-purity graphite material as the anode, and the inert electrode as the cathode. The anode graphite electrode obtains energy under the action of AC pulse current. When the energy obtained by some carbon atoms on the graphite electrode reaches enough to overcome the interaction between graphite carbon atoms When the force is applied, it is excited into the electrolyte to for...

Claims

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Application Information

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IPC IPC(8): C01B31/00C01B31/04
Inventor 杨晓峰张培模张日清庞中海阮明礼叶宛丽范志利
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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