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A method for preparing square bricks by microwave sintering of industrial waste and the products obtained therefrom

A technology of industrial waste and microwave sintering, which is applied in the field of inorganic non-metallic materials (ceramics) to achieve the effects of wide sources, short holding time and saving ceramic raw materials

Inactive Publication Date: 2015-09-09
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no report has been found so far that completely adopts industrial waste to prepare square bricks, so all the use of industrial waste to prepare square bricks has obvious advantages and industrial application value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The weight percentage of the green body formula is: fly ash 50%, feldspar tailings 50%, after batching, dry ball milling, sieving (250 mesh sieve, sieve residue is 0), granulation, compression molding (pressure 5MPa), microwave firing (using silicon carbide powder as auxiliary heating material) to obtain products, wherein the sintering temperature is: 1000 ° C, the firing time is 2.5 hours, and the holding time is 10 minutes. The water absorption rate of the square brick products is 3.2%, and the compressive strength is 77.5MPa.

Embodiment 2

[0012] The weight percentage of the green body formula is: fly ash 50%, feldspar tailings 50%, after batching, dry ball milling, sieving (250 mesh sieve, sieve residue is 0), granulation, compression molding (pressure 5MPa), microwave firing (using silicon carbide powder as auxiliary heating material) to obtain products, wherein the sintering temperature is: 1000 ° C, the firing time is 3 hours, and the holding time is 10 minutes. The water absorption rate of the square brick products is 2.3%, the compressive strength is 98.7MPa.

Embodiment 3

[0014] The weight percentage of the green body formula is: 60% fly ash, 40% feldspar tailings, after batching, dry ball milling, sieving (250 mesh sieve, sieve residue is 0), granulation, compression molding (pressure 5MPa), microwave sintering (using silicon carbide powder as auxiliary heating material) to obtain products, wherein the sintering temperature is: 1050 ° C, the firing time is 2.5 hours, and the holding time is 10 minutes. The water absorption rate of the square brick products is 1.2%, the compressive strength is 116.3MPa.

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Abstract

The invention relates to a method for preparing a square brick by using industrial waste through microwave sintering and a prepared product. The industrial waste is taken as a raw material. A blank formula consists of the following components in percentage by weight: 50-75 percent of pulverized fuel ash and 25-50 percent of feldspar quarry tailings. The product is obtained by material proportioning, dry ball milling, sieving, pelletizing, compression molding and microwave firing, wherein the sintering temperature is 1,000-1,050 DEG C, the firing time is 2-3 hours, and the heat preserving time is 10-15 minutes. In the method, industrial waste is completely taken as the raw material, the water absorption of the prepared square brick is lower than 3.5 percent, and the tensile strength of the prepared square brick is 75-125MPa. By adopting the method, ceramic raw materials which are in shortage are saved. Moreover, the method is consistent with the national policy of energy conservation and emission reduction, thus the method has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials (ceramics), and specifically relates to a method for preparing square bricks by microwave sintering of industrial wastes and a product thereof. Background technique [0002] Square brick is a new type of building material, and it is a new and ideal decoration material for paving squares, airports, stations and sidewalks. Due to the high-quality raw materials used in the production of square bricks, the price of the product is high, which affects the market competitiveness of the product. To use fly ash discharged from local thermal power plants as the main raw material to produce square bricks. But up to now, no report has been found to completely adopt industrial waste to prepare square bricks, so all the use of industrial waste to prepare square bricks has obvious advantages and industrial application value. Contents of the invention [0003] The technical problem to be solved...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/01C04B35/64
Inventor 刘阳熊春华
Owner JINGDEZHEN CERAMIC UNIV