Method for preparing graphite crucible with recycled graphite

A technology for regenerating graphite and graphite crucibles, which is applied in the field of waste graphite recycling, can solve problems such as restricting product specifications, and achieve the effects of product quality improvement, energy reuse, and strong corrosion resistance.

Active Publication Date: 2016-01-27
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the molding method is only suitable for pressing products with small dimensions in three directions and with similar dimensions in three directions, which limits product specifications.

Method used

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  • Method for preparing graphite crucible with recycled graphite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1) Preparation of medium-temperature modified asphalt: place the asphalt in an asphalt melting tank at a temperature of 160°C for dehydration and precipitation for 72 hours to obtain medium-temperature modified asphalt;

[0047] 2) Crushing: crush and sieve the regenerated graphite and calcined coke respectively to obtain regenerated graphite powder and calcined coke powder, the particle size of the regenerated graphite powder is 0.5mm, and the particle size of calcined coke powder is 0.075mm, and set aside;

[0048] 3) Ingredients: Take 60kg of the above-mentioned spare regenerated graphite powder and 13kg of calcined coke powder, and mix them evenly to obtain a mixed dry material;

[0049] 4) Kneading: Put the mixed dry material obtained in step 3) into a kneading pot, dry mix for 35 minutes, make the temperature of the mixed dry material reach 128°C, then add 27 kg of prepared medium-temperature modified asphalt, and wet mix for 35 minutes;

[0050] 5) Dry the materi...

Embodiment 2

[0066] 1) Preparation of medium-temperature modified asphalt: place the asphalt in an asphalt melting tank at a temperature of 180°C for dehydration and precipitation for 68 hours to obtain medium-temperature modified asphalt;

[0067] 2) Crushing: crush and sieve the regenerated graphite and calcined coke respectively to obtain regenerated graphite powder and calcined coke powder, the particle size of the regenerated graphite powder is 0.335mm, and the particle size of calcined coke powder is 0.005mm, and set aside;

[0068] 3) Ingredients: Take 60kg of the above-mentioned spare regenerated graphite powder and 15kg of calcined coke powder, and mix them evenly to obtain a mixed dry material;

[0069] 4) Kneading: Put the mixed dry material obtained in step 3) into a kneading pot, dry mix for 45 minutes, make the temperature of the mixed dry material reach 132°C, then add 25 kg of prepared medium-temperature modified asphalt, and wet mix for 45 minutes;

[0070] 5) Dry the mate...

Embodiment 3

[0085] 1) Preparation of medium-temperature modified asphalt: place the asphalt in an asphalt melting tank at a temperature of 160°C for dehydration and precipitation for 75 hours to obtain medium-temperature modified asphalt;

[0086] 2) Crushing: crush and sieve the regenerated graphite and calcined coke respectively to obtain regenerated graphite powder and calcined coke powder, the particle size of the regenerated graphite powder is 0.4mm, and the particle size of calcined coke powder is 0.055mm, and set aside;

[0087] 3) Ingredients: Take 60kg of the above-mentioned spare regenerated graphite and 14kg of calcined coke, and mix them evenly to obtain a mixed dry material;

[0088] 4) Kneading: Put the mixed dry material obtained in step 3) into a kneading pot, dry mix for 38 minutes, make the temperature of the mixed dry material reach 135°C, then add 26 kg of prepared medium-temperature modified asphalt, and wet mix for 38 minutes;

[0089] 5) Dry the material: the kneade...

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Abstract

The invention relates to the technical field of waste graphite recycling, in particular to a method for preparing a graphite crucible with recycled graphite. The method comprises the steps of: 1) putting pitch in a pitch melting tank at 160-180 DEG C for dehydration and settling for 72h to form moderate temperature modified pitch, 2) crushing and screening the recycled graphite and calcined coke respectively to form recycled graphite powder and calcined coke powder for future use, 3) uniformly mixing the standby recycled graphite powder and the calcined coke powder to form a mixed dry material, 4) putting the obtained mixed dry material into a mixing-kneading pot for dry mixing for 35-45min, then adding the moderate temperature modified pitch for wet mixing for 35-45min, 5) cooling mixed and kneaded paste to the room temperature, 6) grinding the aired paste into powder, 7) pressing the ground powder for forming to form a crucible blank, 8) putting the obtained crucible blank in a roasting furnace for roasting, and 9) machining the qualified roasted crucible blank. The method is simple and improves product quality.

Description

technical field [0001] The invention relates to the technical field of regeneration and utilization of waste graphite, in particular to a method for preparing a graphite crucible with recycled graphite. Background technique [0002] Graphite crucible has good thermal conductivity and high temperature resistance. During high temperature use, the thermal expansion coefficient is small, and it has certain strain resistance to rapid heating and rapid cooling. It has strong corrosion resistance to acid and alkaline solutions and has excellent chemical stability. Due to the above excellent properties, graphite crucibles are widely used in the smelting of alloy tool steels and the smelting of non-ferrous metals and their alloys in metallurgy, casting, machinery, chemical and other industrial sectors. For example, graphite crucibles are widely used in precious metal smelting, Lithium battery anode material purification, polysilicon material smelting, ingot casting and other industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/524
Inventor 董贤虎张培林赤九林张培模刘伟凯李江戴雪飞
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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