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Device and method for preparing coal-based carbon foam through microwave heating under normal pressure

A technology of microwave heating and carbon foam, which is applied in ceramic products, applications, household appliances, etc., can solve problems such as cracking, and achieve the effect of shortening time and reducing energy consumption

Active Publication Date: 2017-01-04
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to provide a kind of coal-based carbon foam preparation time that can greatly shorten the preparation time of coal-based carbon foam primary body, reduce energy consumption; And solve the problem of coal-based carbon foam existing macro cracks and cracking under normal pressure microwave heating preparation coal-based carbon foam installation

Method used

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  • Device and method for preparing coal-based carbon foam through microwave heating under normal pressure
  • Device and method for preparing coal-based carbon foam through microwave heating under normal pressure
  • Device and method for preparing coal-based carbon foam through microwave heating under normal pressure

Examples

Experimental program
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Effect test

Embodiment 1

[0064] (1) Precursors for preparing coal-based carbon foams:

[0065] Grinding dry bituminous coal with a volatile content of 20.45% on ash-free basis to 60-200 mesh, as a precursor for preparing coal-based carbon foam powder, for later use;

[0066] Or the prepared coal-based carbon foam powder precursor, and then the vitrinite enrichment obtained through enrichment and separation, is used as the coal-based carbon foam powder precursor for preparation;

[0067] Or add the coal-based carbon foam powder precursor to the metal mold, pressurize the powder precursor to 5-20MPa with a press, and make a coal-based carbon foam precursor for later use;

[0068] Grinding dry ash-free coking coal with a volatile content of 20.45% to 60-200 mesh, putting 1500 grams of pulverized coal into a metal mold, and pressing it to 10 MPa with a press to obtain a coal-based carbon foam precursor;

[0069] (2) Heating to prepare coal-based carbon foam primary body:

[0070] Move the shape precurso...

Embodiment 1-4

[0079] Examples 1-4 reflect the impact of changes in the type of coal and foaming temperature on the bulk density and compressive strength of carbon foam; Examples 5-8 reflect the change in the type of vitrinite enrichment and the effect of foaming temperature Change, the impact on the carbon foam bulk density and compressive strength; embodiment 9-13 embodies the impact of the change of material mechanical pressure on the carbon foam bulk density and compressive strength when the vitrinite enrichment is the precursor; Examples 14-18 reflect the influence of the change of the heating rate of microwave heating on the bulk density and compressive strength of carbon foam when the vitrinite enrichment is used as the precursor; Examples 19-22 reflect the enrichment of vitrinite When the material is a precursor, after microwave heating to the foaming temperature, the change of the constant temperature time (that is, the foaming time) affects the volume density and compressive strengt...

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Abstract

The invention provides a device and a method for preparing coal-based carbon foam through microwave heating under normal pressure. The device mainly comprises a microwave protection box, a support, a quartz mold, a microwave generator, an intelligent temperature controller and a microwave power regulator, wherein the support and the quartz mold are arranged in the microwave protection box; the microwave generator is arranged below the support; the intelligent temperature controller and the microwave power regulator are arranged outside the microwave protection box. The preparation method is a method for preparing coal-based carbon foam through microwave heating under normal pressure and comprises the following main steps: preparing a precursor of the coal-based carbon foam, preparing a primary body of the coal-based carbon foam through microwave heating and carrying out carbonizing treatment on the primary body of the coal-based carbon foam, thus preparing the coal-based carbon foam. The device and the method have the beneficial effects that the time of preparing the coal-based carbon foam is greatly shortened, the energy consumption is reduced and the problem that macrocracks and even cracking appear when the coal-based carbon foam is prepared depending on heat conduction is solved; meanwhile, the method has the characteristics of simplicity and practicability and easiness in popularization.

Description

technical field [0001] The invention belongs to the technical field of preparing coal-based carbon foam, in particular to a device and method for preparing coal-based carbon foam by microwave heating under normal pressure. Background technique [0002] Carbon foam is an emerging material with both structural and functional properties. It is a lightweight carbon material with three-dimensional crosslinked pores, pore walls, and different pore crosslinked parts. The pore structure of carbon foam includes volume density, porosity, true density, pore morphology, average pore diameter, pore density (that is, the number of pores per unit volume of carbon foam)), pore size distribution, etc. By changing the types and properties of raw materials and preparation parameters, the pore structure of carbon foam can be tailored, and then the performance of carbon foam can be regulated. Therefore, carbon foam has the properties of being a thermal management material, a wave-absorbing mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/52C04B35/64
CPCC04B35/522C04B35/64C04B38/067C04B2235/6562C04B2235/667C04B2235/77C04B2235/96C04B2235/9607
Inventor 徐国忠王绍艳钟祥云徐桂英
Owner UNIV OF SCI & TECH LIAONING
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