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Through-pore porous ceramic prepared by using pulverized fuel ash and preparation method of through-pore porous ceramic

A technology of porous ceramics and fly ash, applied in the field of ceramic materials, can solve the problems of difficult process control, complex preparation process, complicated preparation process, etc., and achieve the effect of expanding the industrial chain of circular economy, simple process and easy-to-obtain raw materials

Inactive Publication Date: 2018-08-31
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this method is relatively complex, time-consuming, and process control is difficult.
[0010] It can be seen from the above documents and patents that the porous ceramic materials currently prepared by using fly ash have a small proportion of industrial solid waste in the raw materials, the maximum is no more than 70%, and at the same time, pore-forming agents, binders, and activators need to be consumed , stabilizers and other additives, etc.; its preparation process is complicated, the process is long, there are many variable factors, and the operation is difficult

Method used

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  • Through-pore porous ceramic prepared by using pulverized fuel ash and preparation method of through-pore porous ceramic
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  • Through-pore porous ceramic prepared by using pulverized fuel ash and preparation method of through-pore porous ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Specific steps:

[0055] (1) Take 100g of fly ash, carbon powder, potassium feldspar and kaolin according to the mass ratio of 90:5:4.2:0.8 (90%︰5%︰4.2%︰0.8%);

[0056] (2) Pulverize and mix the four kinds of slag with a vibrating ball mill to make the particle size 30μm, and the mixing time is 40s;

[0057] (3) Place the uniformly mixed powder in a mold for compression molding, the molding pressure is 41MPa, and the holding time is 60s;

[0058] (4) Place the formed sample in a muffle furnace for high-temperature pressureless sintering, heating rate: room temperature to 200 °C, 1 °C / min, 200 °C to 1100 °C, 5 °C / min, sintering temperature 1100 °C, heat preservation The time is 120 min, the sintering is completed, and it is left to cool naturally in the muffle furnace;

[0059] (5) Samples are subjected to subsequent analysis and testing.

[0060] It has been determined that the ablation rate of the porous ceramic obtained in Example 1 is 18.16%, the water absorption ...

Embodiment 2

[0063] Specific steps:

[0064] (1) Take 100g of fly ash, carbon powder, potassium feldspar and kaolin according to the mass ratio of 80:10:8.4:1.6 (80%︰10%︰8.4%︰1.6%);

[0065] (2) Grinding and mixing the four kinds of slag materials with a vibrating ball mill, so that the particle size is 35 μm, and the mixing time is 40 s;

[0066] (3) Place the uniformly mixed powder in the mold for compression molding, the molding pressure is 120MPa, and the holding time is 60s;

[0067] (4) Place the formed sample in a muffle furnace for high-temperature pressureless sintering, heating rate: room temperature to 200 °C, 1 °C / min, 200 °C to 1100 °C, 5 °C / min, sintering temperature 1100 °C, heat preservation The time is 120 min, the sintering is completed, and it is left to cool naturally in the muffle furnace;

[0068] (5) Samples are subjected to subsequent analysis and testing.

[0069] It has been determined that the ablation rate of the porous ceramic obtained in Example 2 is 20.56%...

Embodiment 2

[0070] The SEM microscopic morphology of the porous ceramics obtained in Example 2 is shown in Figure 2.

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Abstract

The invention belongs to the field of ceramic materials and relates to a through-pore porous ceramic prepared by using pulverized fuel ash and a preparation method of the through-pore porous ceramic.The industrial solid waste pulverized fuel ash is taken as the raw material, a carbon dust is taken as a pore forming agent, a small quantity of kaolin and potassium feldspar is added as sintering aids, and the porous ceramic is obtained through ball-milling, mixing, dry pressing, and sintering at the high temperature. The mixing ratio of the solid waste of the method is up to 90%, wherein the mixing ratio of the pulverized fuel ash is up to 90% when the mixing ratio of the carbon dust is 5%, the proportion of the industrial solid waste pulverized fuel ash in the ingredients is greatly increased, and the purposes of treating the waste by the waste, comprehensively utilizing the resources and expanding the industry chain of circular economy are fulfilled. The total porosity of the porous ceramic is 38%-56%, the volume density is 1.1 g / cm<3> to 1.6 g / cm<3>, the water absorption is 24-50%, and the porous ceramic can be used for filtering high-temperature flue gas, sewage and the like, andthe application field of the industrial solid waste reutilization product is expanded.

Description

technical field [0001] The invention belongs to the field of ceramic materials, in particular to a through-pore porous ceramic prepared by using fly ash and a preparation method thereof. Background technique [0002] With the rapid development of my country's social modernization industry, a large amount of solid waste is produced, which occupies land, pollutes the environment, and imposes a heavy burden on social and economic development and natural environment protection. Making full use of these wastes is of great significance to improving resource utilization efficiency, developing circular economy, building a conservation-oriented society, protecting the environment, and benefiting mankind. However, at present, the reuse of industrial solid waste in my country is mainly in the form of temporary road and ground landfill, sintering to prepare cement clinker, sintering to make bricks and other simple reprocessing methods. The types of industrial solid waste used and the pr...

Claims

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Application Information

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IPC IPC(8): C04B33/135C04B33/13C04B38/06
CPCC04B33/131C04B33/1352C04B38/068C04B2235/3472C04B2235/77C04B38/0003C04B38/0074C04B38/0067Y02P40/60
Inventor 海万秀韩凤兰姜木俊
Owner BEIFANG UNIV OF NATITIES
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