A kind of ultrafine structure isotropic graphite and preparation method thereof
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A technology of isotropic and isotropic coke, applied in the field of ultra-fine structure isotropic graphite and its preparation, which can solve the problems of high operating intensity and so on
Active Publication Date: 2021-04-09
KAIFENG CARBON CO LTD OF CHINA PINGMEI SHENMA GRP +1
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[0006] At present, the traditional method is to use anisotropic coke as the main raw material to prepare isotropic graphite. Roasting, impregnation, secondary roasting and graphitization and other processes, the operation intensity is high
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Embodiment 1
[0041] The ultra-fine structure isotropic graphite of the present invention is represented by weight percent. The ultra-fine structure isotropic graphite is composed of 55% isotropic coke as raw material, 20% high-purity artificial graphite, and 1.5% octadecanoic acid as a friction reducer. %, 23% of hard asphalt and 0.5% of auxiliary additives.
[0042] The auxiliary additive is a mixture of ferric oxide and ferric oxide, and the mixing mass ratio between the two is 5:1.
Embodiment 2
[0044] Embodiment 1 of the present invention is the preparation method of ultrafine structure isotropic graphite, the detailed steps of this preparation method are as follows:
[0045] 1) First, crush the raw material isotropic coke to <10 μm, high-purity artificial graphite to <10 μm, and hard pitch to <45 μm;
[0046] 2) Prepare isotropic coke, high-purity artificial graphite, hard pitch and other raw materials according to the batching ratio of ultra-fine structure isotropic graphite described in Example 1 after step 1);
[0047] 3) placing the other raw materials prepared in step 2) except the friction reducer in an airflow mixer and mixing them uniformly to obtain a mixture;
[0048] 4) Send the mixture obtained in step 3) into a kneader, add the prepared friction reducer, and then heat up to 180°C for kneading. The kneading time is 45 minutes, and the paste is obtained after kneading;
[0049] 5) Cool the paste obtained in step 4) to 130°C for 25 minutes to remove moist...
Embodiment 3
[0061] The ultra-fine structure isotropic graphite of the present invention is represented by weight percent. The ultra-fine structure isotropic graphite is composed of 58% isotropic coke as raw material, 15% high-purity artificial graphite, and 1.5% stearic acid as a friction reducer. %, 25% of hard asphalt and 0.5% of auxiliary additives.
[0062] The auxiliary additive is a mixture of ferric oxide and ferric oxide, and the mixing mass ratio between the two is 5:1.
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Abstract
The invention discloses an ultrafine structure isotropic graphite and a preparation method thereof. The ultra-fine structure isotropic graphite is mainly made of isotropic coke, high-purity artificial graphite, friction reducer, hard pitch and auxiliary additives. First, crush isotropic coke, high-purity artificial graphite and hard pitch, and then mix other raw materials except friction reducer to obtain a mixture; the mixture is kneaded into a paste, and the paste is cooled to make a paste; after paste The paste is molded to obtain a raw product; the raw product is roasted to obtain a primary roasted product; the primary roasted product is impregnated to obtain an impregnated product; the impregnated product is roasted again to obtain a second roasted product; the second roasted product is sent to the graphitization furnace for graphitization treatment, The product ultrafine structure isotropic graphite is obtained. The isotropic graphite product with superfine structure prepared by the invention has the characteristics of high mechanical strength, high hardness, good isotropy, dense structure, low resistivity and the like.
Description
[0001] 1. Technical field: [0002] The invention relates to an isotropic graphite and a preparation method thereof, in particular to an ultrafine structure isotropic graphite and a preparation method thereof. [0003] 2. Background technology: [0004] Isotropic graphite is defined as the degree of isotropy between 1.0 and 1.1. It is an important industrial raw material emerging in recent years. It is a high-quality special graphite. In addition to the properties of graphite itself, it also has many unique physical and chemical properties. Performance (such as: the physical properties in all directions are the same, and the characteristics have nothing to do with the size, shape, and sampling direction; the material structure is compact, the product surface hardness is high, and the mechanical strength is high; the material has good thermal shock resistance, and it can be used in rapid cooling and rapid heating conditions. It is not easy to crack under the environment; high te...
Claims
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