Method for preparing seepage brick by coal ash

A technology of fly ash and permeable bricks is applied in the field of preparation of floor tiles, which can solve the problems of difficult to achieve ideal water permeability, compressive strength and flexural strength, etc., and achieve the effects of being conducive to environmental protection, good sound absorption effect, and pollution reduction.

Inactive Publication Date: 2009-12-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these permeable brick production technologies do not solve the problem of raw material particle gradation, so it is difficult to achieve ideal water permeability and compressive and flexural strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Put the fly ash and potassium feldspar raw materials into a ball mill for dry grinding respectively, use alumina ball stone as the grinding medium, control the mass ratio of the ball and the raw material to be 3:1, grind for 0.5h respectively, and then pass through 120 Mesh sieve, use permanent magnet to remove iron from the sieved fly ash, and then use electromagnetic to remove iron, so that Fe in fly ash 2 o 3 content of less than 0.5%;

[0028] 2) Get the fly ash after iron removal, potassium feldspar and kaolin after sieving with fly ash: potassium feldspar: kaolin=40%: 40%: 20% mass percentage mixes mixture and puts mixture Wet milling and mixing in the ball mill, that is, using alumina ball stone as the grinding medium, controlling the mass ratio of balls, mixture and water to 3:1:0.5, and grinding for 0.5h to form a mixture slurry;

[0029] 3) Pass the mixed slurry through a 120-mesh sieve, put it into an electric heating constant temperature blast drying ov...

Embodiment 2

[0039] 1) Put the fly ash and potassium feldspar raw materials into a ball mill for dry grinding, use alumina ball stone as the grinding medium, control the mass ratio of the ball and the raw material to 2.5:1, grind for 2 hours respectively, and then pass through 120 meshes respectively Sieve, use permanent magnet to remove iron from the sieved fly ash, and then use electromagnetic to remove iron, so that Fe in fly ash 2 o 3 content of less than 0.5%;

[0040] 2) Get the fly ash after iron removal, potassium feldspar and kaolin after sieving with fly ash: potassium feldspar: kaolin=60%: 30%: 10% mass percentage mixes the mixture and put the mixture Wet milling and mixing in the ball mill, that is, using alumina ball stone as the grinding medium, controlling the mass ratio of balls, mixture and water to 2.5:1:0.5, and grinding for 2 hours to form a mixture slurry;

[0041] 3) Pass the mixed slurry through a 120-mesh sieve, put it into an electric heating constant temperature b...

Embodiment 3

[0051] 1) Put the fly ash and potassium feldspar raw materials into a ball mill for dry grinding, use alumina balls as the grinding medium, control the mass ratio of the balls and raw materials to 2.8:1, grind for 1 hour respectively, and then pass through 120 meshes respectively Sieve, use permanent magnet to remove iron from the sieved fly ash, and then use electromagnetic to remove iron, so that Fe in fly ash 2 o 3 content of less than 0.5%;

[0052] 2) Get the fly ash after iron removal, potassium feldspar and kaolin after sieving with fly ash: potassium feldspar: kaolin=50%: 35%: 15% mass percentage mixes mixture and puts mixture Wet milling and mixing in a ball mill, that is, using alumina balls as a grinding medium, controlling the mass ratio of balls, mixture and water to 2.8:1:0.5, and grinding for 1 hour to form a mixture slurry;

[0053] 3) Pass the mixed slurry through a 120-mesh sieve, put it into an electric heating constant temperature blast drying oven, and d...

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Abstract

The invention relates to a method for preparing a seepage brick by coal ash. The coal ash, potash feldspar and kaolin are mixed and put into a ball mill for wet grinding to be even, so as to form mixed slurry; the mixed slurry is dried into powder material and then pressed into green body; the pressed green body is sintered and cooled naturally and then is put into an edge runner mill to be smashed into aggregate; waste glass is put into the ball mill for dry grinding, and then bentonite is added and grinding is continued, so as to form mixed material; arabic gum solution is added into the mixed material to form mixed slurry, and then the aggregate and the mixed slurry are stirred to be even, filtered by pumping by a circulation water vacuum pump and then put into a steel mould to be pressed into a green body; and the pressed green body is dried and sintered, cooled naturally and then taken out, thus obtaining the coal ash seepage brick. The invention takes industrial waste coal ash and waste glass powder as raw materials, which is beneficial for saving natural resources and reducing production cost; meanwhile the raw materials are sintered at high temperature, no harmful gas is produced in sintering except gas given off by the raw materials, and pollution of waste gas towards environment is reduced.

Description

technical field [0001] The invention relates to a method for preparing floor tiles, in particular to a method for preparing water seepage bricks by using waste fly ash and waste glass. Background technique [0002] With the progress of society, the surface of the city is increasingly covered by buildings and concrete and other impervious pavements, forming an "urban desert". These hardened pavements make it difficult to exchange heat and moisture between the ground surface and the air, and the ability to naturally regulate the temperature and humidity of the urban ground is significantly reduced. In rainy days, prevent rainwater from infiltrating directly into the ground, causing water to accumulate everywhere, affecting the comfort and safety of roads, and blocking the way for rainwater to directly replenish groundwater, making it difficult for urban groundwater to rise, directly affecting the healthy growth of urban surface vegetation. Greening is difficult, aggravating t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B3/00B28B11/24B28C1/18B28C1/02B28C1/08B28B7/00C04B18/02
Inventor 黄剑锋曹丽云李颖华吴建鹏
Owner SHAANXI UNIV OF SCI & TECH
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