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Method for preparing melilite phase-containing porous material by using magnesium residue, fly ash and carbide slag

A porous material and fly ash technology, applied in the field of porous materials, can solve the problem that the proportion of industrial solid waste is not too high, and achieve the effect of increasing the proportion and reducing the complexity

Active Publication Date: 2018-01-26
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this preparation method digests three kinds of industrial solid wastes, the proportion of industrial solid wastes used is still not too high

Method used

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  • Method for preparing melilite phase-containing porous material by using magnesium residue, fly ash and carbide slag
  • Method for preparing melilite phase-containing porous material by using magnesium residue, fly ash and carbide slag
  • Method for preparing melilite phase-containing porous material by using magnesium residue, fly ash and carbide slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Specific steps:

[0041] (1) Take 200g of the three solid wastes of magnesium slag, fly ash and carbide slag according to the mass ratio of 1:0.5:0.17;

[0042] (2) Mix the three kinds of slag materials with a vibrating ball mill, and the mixing time is 60s;

[0043] (3) Place the uniformly mixed powder in the mold for compression molding, the molding pressure is 95.9MPa, and the holding time is 60s;

[0044] (4) Place the formed sample in a muffle furnace for high-temperature pressureless sintering. The heating rate is 10°C / min, the sintering temperature is 1150°C, and the holding time is 240min. After the sintering is completed, place it in the muffle furnace for natural cooling ;

[0045] (5) Samples are subjected to subsequent analysis and testing.

[0046] The measured compressive strength is 29.97MPa, the total porosity is 33.72%, the water absorption is 20.10%, and the bulk density is 1.68g / cm 3 . XRD phase analysis, and its porous microscopic morphology are...

Embodiment 2

[0048] Specific steps:

[0049] (1) Take 200g of the three solid wastes of magnesium slag, fly ash and carbide slag according to the mass ratio of 1:0.36:0.07;

[0050] (2) Mix the three kinds of slag materials with a vibrating ball mill, and the mixing time is 60s;

[0051] (3) Place the uniformly mixed powder in the mold for compression molding, the molding pressure is 95.9MPa, and the holding time is 60s;

[0052] (4) Place the formed sample in a muffle furnace for high-temperature pressureless sintering. The heating rate is 10°C / min, the sintering temperature is 1150°C, and the holding time is 240min. After the sintering is completed, place it in the muffle furnace for natural cooling ;

[0053] (5) Samples are subjected to subsequent analysis and testing.

[0054] The measured compressive strength is 98.36MPa, the total porosity is 19.6%, the water absorption is 8.92%, and the bulk density is 2.09g / cm 3 . Its microstructure is as attached image 3 shown.

Embodiment 3

[0056] Specific steps:

[0057] (1) Take 200g of the three solid wastes of magnesium slag, fly ash and carbide slag according to the mass ratio of 1:0.42:0.25;

[0058] (2) Mix the three kinds of slag materials with a vibrating ball mill, and the mixing time is 60s;

[0059] (3) Place the uniformly mixed powder in the mold for compression molding, the molding pressure is 95.5MPa, and the holding time is 60s;

[0060] (4) Place the formed sample in a muffle furnace for high-temperature pressureless sintering. The heating rate is 10°C / min, the sintering temperature is 1150°C, and the holding time is 240min. After the sintering is completed, place it in the muffle furnace for natural cooling ;

[0061] (5) Samples are subjected to subsequent analysis and testing.

[0062] The measured compressive strength is 20.70MPa, the total porosity is 33.74%, the water absorption is 18.97%, and the bulk density is 1.79g / cm 3 . Its XRD phase analysis is as attached Figure 4 shown.

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Abstract

In the prior art, magnesium residue, fly ash, carbide slag and other industrial solid waste have high emission, occupying a large amount of land resources, and easily form dust so as to cause air andwater pollution. According to the present invention, a melilite phase-containing porous material is prepared through high temperature sintering by doping magnesium residue, fly ash and carbide slag, such that the waste can be treated with the waste, the prepared porous material can be used in the fields of sound insulation, thermal insulation, filtration and the like, and the industrial solid waste reutilization field is expanded.

Description

technical field [0001] The invention relates to a method for preparing a porous material containing mellow feldspar phase by utilizing industrial solid waste, and belongs to the field of ceramic materials. Background technique [0002] Yellow feldspar is a kind of mineral in the silicate minerals composed of calcium silicate / sodium silicate containing aluminum, magnesium and iron. The general chemical composition is (Ca, Na) 2 (Al,Mg,Fe 2+ )[(Al,Si)SiO 7 ]. calcium aluminate feldspar Ca 2 Al(AlSi)O 7 and magnesian feldspar (Ca 2 Mg(Si 2 o 7 ) are the two most important minerals in the mellandite group. In the composition, the Mg-Al is completely isomorphic, accompanied by the substitution of Si-Al. Same quality series. These minerals crystallize from calcium-rich alkaline magma. [0003] Yellow feldspar is mainly used in the manufacture of ceramic glazes, ceramics, refractory materials, thermal insulation materials and cement. In addition magnesian feldspar Ca 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/132C04B33/135C04B33/138C04B35/22
CPCY02P40/60
Inventor 韩凤兰罗钊海万秀梁博
Owner BEIFANG UNIV OF NATITIES
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