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Palm-based artificial graphite and preparation method thereof

An artificial graphite and palm-based technology, applied in chemical instruments and methods, petroleum industry, inorganic chemistry, etc., can solve the problems of cumbersome process, low degree of graphitization, high production cost, etc., achieve good magnification, high degree of graphitization, The effect of low production cost

Pending Publication Date: 2020-11-06
ZHONGHE TIANCHENG TECH DEV (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the present invention provides a palm-based artificial graphite and its preparation method to solve the problems of cumbersome process, high production cost and low degree of graphitization in the existing artificial graphite preparation method.

Method used

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  • Palm-based artificial graphite and preparation method thereof
  • Palm-based artificial graphite and preparation method thereof
  • Palm-based artificial graphite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of preparation method of palm-based artificial graphite comprises the steps:

[0052] Step 1. The palm-based body is screened through a drum vibrating sieve to remove powder and dust to obtain high-quality palm shell raw materials. The qualified palm-based body is transported into the drying system for drying. The moisture contained in the palm-based body 40%-50%, after drying, the water content will be reduced to less than 15%, and the dried palm-based powder will be crushed by a crusher to obtain palm-based powder with a particle size of 0.2-0.8mm.

[0053] Mix asphalt and tire oil at a weight ratio of 1:5, and stir at 80°C-150°C for 1 hour to obtain a mixed liquid of asphalt tire oil.

[0054] Step 2, mixing the palm-based powder and the asphalt tire oil mixed liquid at a weight ratio of 1:1.5 at a temperature of 80°C-150°C for 1h-2h to obtain a mixed material.

[0055] Step 3, fermenting the mixed material together with 0.3% hydrogen peroxide of the mixed ma...

Embodiment 2

[0062] A kind of preparation method of palm-based artificial graphite, this preparation method has following difference with embodiment 1, other is with embodiment 1:

[0063] The concrete steps of described graphitization treatment are as follows:

[0064] Wash the high-temperature graphitization furnace twice, evacuate to a vacuum of 0.1MPa, then fill with argon to atmospheric pressure, evacuate to 0.1MPa, and then fill with argon to slightly positive pressure;

[0065] 100kg of carbonized material is cooled by the cooling system, then passed through particle shaping, and then enters the high-temperature graphitization furnace;

[0066] Under an argon atmosphere with a ventilation flow rate of 5L / min-15L / min, heat up the high-temperature graphitization furnace to 3000°C at a rate of 10°C / min and keep it for 4 hours, then naturally cool down to room temperature to obtain 81.5kg of palm-based artificial graphite . The material loss rate during the graphitization process was ...

Embodiment 3

[0068] A kind of preparation method of palm-based artificial graphite, this preparation method has following difference with embodiment 1, other is with embodiment 1:

[0069] The concrete steps of described graphitization treatment are as follows:

[0070] Wash the high-temperature graphitization furnace twice, evacuate to a vacuum of 0.1MPa, then fill with argon to atmospheric pressure, evacuate to 0.1MPa, and then fill with argon to slightly positive pressure;

[0071] 100kg of carbonized material is cooled by the cooling system, then passed through particle shaping, and then enters the high-temperature graphitization furnace;

[0072] Under an argon atmosphere with a ventilation flow rate of 5L / min-15L / min, heat up the high-temperature graphitization furnace to 3000°C at a rate of 15°C / min and keep it for 5 hours, then cool down naturally to room temperature to obtain 85.2kg of palm-based artificial graphite . The material loss rate during the graphitization process was ...

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Abstract

The invention discloses palm-based artificial graphite and a preparation method thereof, and relates to the technical field of graphite, and the preparation method comprises the following steps: screening palm shells, and sequentially drying and crushing the palm shells which are qualified in screening to obtain palm-based precursor powder; mixing and stirring asphalt and tire oil in proportion toobtain asphalt tire oil mixed liquid; mixing and stirring the palm-based precursor powder and the asphalt tire oil mixed liquid to obtain a mixed material; carrying out fermentation treatment on themixed material and a catalyst to obtain a fermented mixed material; and sequentially carrying out thermal cracking and graphitization treatment on the fermented mixed material to obtain the palm-basedartificial graphite. The preparation method of the palm-based artificial graphite is simple, safe and reliable in operation process, high in production efficiency, low in production cost and high inproduct graphitization degree.

Description

technical field [0001] The invention relates to the technical field of graphite, in particular to a palm-based artificial graphite and a preparation method thereof. Background technique [0002] Graphite, as the most important negative electrode material for lithium-ion batteries, is roughly divided into natural graphite, artificial graphite, and mesocarbon microspheres according to its type. Among them, artificial graphite has many excellent properties, so it is widely used in metallurgy, machinery, electrical, chemical, textile, national defense and other industrial sectors. [0003] In the metallurgical industry, artificial graphite can be used as steelmaking electrodes, while electrodes made of natural graphite are difficult to use in steelmaking electric furnaces with harsh conditions; in the machinery industry, graphite materials are often used as additives for lubricating oil to transport corrosive media Piston rings, lithium-ion battery negative electrode materials,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205C10L1/00H01M4/587H01M10/0525
CPCC01B32/205C10L1/00H01M4/587H01M10/0525Y02E60/10
Inventor 刘宇邱云辉
Owner ZHONGHE TIANCHENG TECH DEV (BEIJING) CO LTD
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