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Preparation method of paste homogenization for vibration-compression molding special graphite

A special graphite, molding technology, applied in building insulation materials, buildings, building components, etc., can solve problems such as poor bonding and adverse effects on green homogeneity

Active Publication Date: 2021-07-30
ZIBO CONTINENTAL CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The vibration-compression molding process requires the paste to have a certain degree of looseness and plasticity, so the amount of binder is 3-5% lower than that of extrusion molding, and the binding force between powder (-0.075mm) and binder is much greater than The binding force between the granules and the binder, so it is easy to form small groups with powder and binder as the main components during kneading. The small diameter is 5-6mm, and the large diameter can reach 20-30mm. The edges are smooth and relatively Hard, because it cannot be broken during vibration-compression molding, resulting in poor bonding, which has a great adverse effect on the homogeneity of the green body

Method used

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  • Preparation method of paste homogenization for vibration-compression molding special graphite

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Experimental program
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Effect test

Embodiment 1

[0029] Select the calcined petroleum coke of -1+0.5mm and -0.075mm, mix it according to the mass ratio of 40:60, add it to the kneading pot, and then add the melted medium-temperature coal tar pitch into the kneading pot according to the mass ratio of 18:82 to the aggregate kneading for 45 minutes to produce a paste; spread the paste evenly on a clean steel plate, and let it cool down to room temperature naturally; crush the cooled paste with a roller crusher until it passes through a sieve below 3.0mm; The divided paste is loaded on the preheating trolley, the thickness of the paste is 50mm, and the distance between each layer of paste is 25mm. After pushing it into the preheating chamber for preheating for 1 hour, the paste temperature is 144°C. A good paste has good looseness and plasticity, no lumps, and the aggregate and binder are evenly mixed.

[0030] The green body produced with this paste has a smooth appearance, a compact cross-sectional structure, and evenly distri...

Embodiment 2

[0032] Select the calcined petroleum coke of -1+0.5mm and -0.075mm, mix it according to the mass ratio of 40:60, add it into the kneading pot, and then add the melted medium-temperature coal tar pitch into the kneading pot according to the mass ratio of 19:81 to the aggregate kneading for 45 minutes to produce paste; spread the paste evenly on a clean steel plate, and cool it down to room temperature naturally; crush the cooled paste with a roller crusher until it passes through a sieve below 3.0 mm; sieve Put the good paste on the preheating trolley, the thickness of the paste is 60mm, the distance between each layer of paste is 25mm, push it into the preheating chamber to preheat for 1.2 hours, the temperature of the paste is 145 ℃, the preheated The paste has good looseness and plasticity, no lumps, and the aggregate and binder are evenly mixed.

[0033] The green body produced with this paste has a smooth appearance, compact cross-sectional structure, and uniform distribut...

Embodiment 3

[0035] Select the calcined petroleum coke of -1+0.5mm and -0.075mm, mix it according to the mass ratio of 40:60, add it into the kneading pot, and then add the melted medium-temperature coal tar pitch into the kneading pot according to the mass ratio of 20:80 to the aggregate Mix and knead for 45 minutes to produce a paste; spread the paste evenly on a clean steel plate, and cool it down to room temperature naturally; crush the cooled paste with a double-roll crusher until it passes through a sieve below 3.0mm. Put the sieved paste on the preheating trolley, the thickness of the paste is 80mm, and the distance between each layer of paste is 25mm, push it into the preheating chamber for 1.5 hours, the temperature of the paste is 147 ℃, preheat The hot paste has good looseness and plasticity, no lumps, and the aggregate and binder are evenly mixed.

[0036] The green body produced with this paste has a smooth appearance, compact cross-sectional structure, and uniform distributio...

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Abstract

The invention relates to a method for preparing paste homogenization for vibration-compression molding special graphite, and belongs to the technical field of paste preparation. The preparation method comprises the following steps: 1. Ingredients: weigh the aggregate and the binder, the mass ratio of the aggregate to the binder is 80:20-82:18; 2. Kneading: mix the bone Add the material and binder into the kneading pot, and then add the melted medium-temperature coal tar pitch; 3. Cooling: spread the paste obtained in step 2 on a clean steel plate and cool it to room temperature; 5. Preheating: put the screened paste on the preheating trolley, push it into the preheating chamber, and preheat for 1-1.5mm Hour. The preparation method provided by the invention can solve the problem of agglomerates in the paste, improve the homogeneity of the paste, produce a green body with high homogeneity, and provide a strong guarantee for the improvement of the homogeneity of the final special graphite product.

Description

technical field [0001] The invention relates to a method for preparing paste homogenization for vibration-compression molding special graphite, and belongs to the technical field of paste preparation. Background technique [0002] "The embankment of a thousand miles is destroyed by an ant's nest", which is the same principle when using special graphite products. If the performance of the product is uneven, it will be consumed quickly when it is used in a flawed place, which will affect the overall service life. Therefore, the better the homogenization of special graphite products, the better the performance, especially the greatly improved service life. Although the uniformity of the product can be improved to a certain extent by the method of dipping, if the homogenization of the green body is not good, even dipping cannot completely make up for it, so the homogenization of the green body plays an important role in the homogenization of the final product. The most importa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00
Inventor 柳文阁王政魏宁
Owner ZIBO CONTINENTAL CARBON