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Porous carbon material and its preparation method

A porous carbon and raw material technology, applied in the field of porous carbon materials and their preparation, can solve the problems of low filtration precision, inconvenient regeneration, low transmittance, etc., achieve good transmittance, good wetting effect, and increase strength Effect

Inactive Publication Date: 2013-04-17
ZIGONG YUXING CARBON PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the porous carbon filter material manufactured by traditional methods has low transmittance and low filtration accuracy during the purification process, and is easy to block, inconvenient to regenerate, and easy to fail.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The porous carbon material prepared by the following steps:

[0026] (1) Raw petroleum coke is selected as the raw material, and ammonium chloride is used as the pore former. The raw materials are all commercially available;

[0027] (2) Crushing and spheroidizing and grading: the raw petroleum coke is crushed and spheroidized with a vortex jet mill, and divided into two particle sizes (-70 mesh + 100 mesh) and (-100 mesh + 160 mesh) with an ultrasonic vibrating screen powder;

[0028] (3) Ingredients: The spheroidized powder obtained above is mixed by mass percentage (-70 mesh + 100 mesh): (-100 mesh + 160 mesh) = 35: 65, plus 10% chlorine based on the total weight of raw materials Ammonium

[0029] (4) Mixing: add the above ingredients into the mixer for heating and mixing, and inject 25% of the total weight of the raw materials and the pore former into the boiled coal tar as the binder, the mixing temperature is 150°C, and the mixing time is 2h;

[0030] (5) Molding: The mat...

Embodiment 2

[0035] (1) Raw pitch coke is selected as the raw material, wood chips powder is used as the pore former, and the raw materials are all commercially available;

[0036] (2) Crushing and spheroidizing and grading: the raw petroleum coke is crushed and spheroidized with a vortex jet mill, and divided into (-100 mesh + 200 mesh) powder with an ultrasonic vibrating screen;

[0037] (3) Ingredients: the spheroidized powder obtained above plus 5% sawdust powder based on the total weight ratio of the raw materials;

[0038] (4) Mixing: add the above ingredients into the mixer for heating and mixing, and inject 30% of the total weight of the raw materials and the pore former into the boiled coal tar as the binder, the mixing temperature is 140°C, and the mixing time is 1.5h;

[0039] (5) Molding: the material obtained above is hot-molded on a hydraulic press at a mold temperature of 150°C;

[0040] (6) Roasting: the green compact obtained above is fired in a carbon roasting furnace at a roasting...

Embodiment 3

[0044] 1. Select metallurgical coke as raw material; use foaming agent as pore-forming agent, raw materials are commercially available;

[0045] 2. Crush and spheroidize and classify; use vortex jet mill to crush and spheroidize metallurgical coke and use ultrasonic vibrating screen to classify into (-40 mesh + 80 mesh) this kind of powder;

[0046] 3. Ingredients: Add 5% foaming agent based on the total weight of the raw material powder to the spheroidized powder obtained above.

[0047] 4. Mixing: Add the above ingredients into the mixer for heating and mixing, and inject the boiled coal tar with a ratio of 35% of the total amount of the raw materials and the pore former as the binder, the mixing temperature is 150°C, and the mixing time is 2 hours.

[0048] 5. Molding: The material obtained above is hot-molded on a hydraulic press at a mold temperature of 150°C

[0049] 6. Firing: The compact obtained above is fired in a carbon baking furnace with a maximum firing temperature o...

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PUM

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Abstract

The invention discloses a porous carbon material and its preparation method. The preparation method provided by the invention successively comprises steps of: raw material and auxiliary material selection, pulverization, spheroidization, grading, burdening, mixing, molding, roasting and the like. Green petroleum coke and green pitch coke are creatively used as raw materials. A filtration materialprepared after spheroidization of a green coke powder has large contractility, high strength, uniform pore distribution, smooth pore path, high filtration precision and good transmissivity, is not easy to block during the purification process, is easy to regenerate, and has long service life. The porous carbon material prepared in the invention can be widely used as a filtration material, a thermal insulation material, a conductance electrode and the like.

Description

Technical field [0001] The invention relates to a new type of material, in particular to a porous carbon material and a preparation method thereof. Background technique [0002] Currently, porous materials used to purify liquids and gases are mostly ceramic materials, metal and alloy materials, polymer materials and fiber materials. Some of these materials are resistant to corrosion but not high temperature, and some are resistant to high temperature but not corrosion resistant. In high-risk substances, heavy metals, precious metals, coal gasification, and environmental protection, a purification material that can withstand high temperature and corrosion, has good permeability, high filtration accuracy, and easy cleaning is required. Due to the chemical stability, high temperature resistance and corrosion resistance of carbon, the filtration requirements can be met by controlling the pore formation. However, the porous carbon filter material manufactured by the traditional meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02
Inventor 袁援张玉桃张宜国王富光
Owner ZIGONG YUXING CARBON PRODS
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