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Sintered brick prepared from domestic waste incineration fly ash and phosphorite tailings and preparation method thereof

A technology of domestic waste incineration and phosphate rock tailings, applied in the field of fired bricks, to achieve the effects of ensuring sustainable development, reducing potential hazards, and saving treatment and disposal costs

Active Publication Date: 2014-04-16
珠海雄峰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At home and abroad, there have been no reports of other scholars using fly ash as the main raw material to develop ceramic tiles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A kind of sintered brick made of domestic waste incineration fly ash and phosphate rock tailings, the mass percentage composition of its raw materials is:

[0065] Household waste incineration fly ash 20%

[0066] Clay 30%

[0067] Phosphate rock tailings 50%.

[0068] Above-mentioned a kind of burnt brick that is made with domestic garbage incineration fly ash and phosphate rock tailings, its preparation process comprises the following steps:

[0069] (1) Pretreatment of raw materials before crushing

[0070] Ventilate and dry domestic waste incineration fly ash, clay, and phosphate rock tailings in a drying room at 15°C for 36 hours;

[0071] (2) Crushing of raw materials

[0072] Grinding the pretreated raw material obtained in step (1), controlling the output fineness of 60% to be between 200 and 250 mesh;

[0073] (3) Aging of raw materials

[0074] Add water to the pulverized raw material obtained in step (2) and stir in a mixer, control the amount of water ...

Embodiment 2

[0090] A kind of sintered brick made of domestic waste incineration fly ash and phosphate rock tailings, the mass percentage composition of its raw materials is:

[0091] Household waste incineration fly ash 25%

[0092] Clay 30%

[0093] Phosphate rock tailings 45%.

[0094] Above-mentioned a kind of burnt brick that is made with domestic garbage incineration fly ash and phosphate rock tailings, its preparation process comprises the following steps:

[0095] (1) Pretreatment of raw materials before crushing

[0096] Ventilate and dry domestic waste incineration fly ash, clay, and phosphate rock tailings in a drying room at 20°C for 40 hours;

[0097] (2) Crushing of raw materials

[0098] Grinding the pretreated raw material obtained in step (1), controlling the output fineness of 60% to be between 200 and 250 mesh;

[0099] (3) Aging of raw materials

[0100] Add water to the pulverized raw material obtained in step (2) and stir in a mixer, control the amount of water ...

Embodiment 3

[0108] A kind of sintered brick made of domestic waste incineration fly ash and phosphate rock tailings, the mass percentage composition of its raw materials is:

[0109] Household waste incineration fly ash 30%

[0110] Clay 30%

[0111] Phosphate rock tailings 40%.

[0112] Above-mentioned a kind of burnt brick that is made with domestic garbage incineration fly ash and phosphate rock tailings, its preparation process comprises the following steps:

[0113] (1) Pretreatment of raw materials before crushing

[0114]Ventilate and dry domestic waste incineration fly ash, clay, and phosphate rock tailings in a drying room at 20°C for 40 hours;

[0115] (2) Crushing of raw materials

[0116] Grinding the pretreated raw material obtained in step (1), controlling the discharge fineness of 65% to be between 200 and 250 mesh;

[0117] (3) Aging of raw materials

[0118] Add water to the pulverized raw material obtained in step (2) and stir in a mixer, control the amount of wate...

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Abstract

The invention discloses a sintered brick prepared from domestic waste incineration fly ash and phosphorite tailings and a preparation method thereof. The sintered brick prepared from domestic waste incineration fly ash and phosphorite tailings is prepared from the following raw materials in percentage by mass: 20-30% of domestic waste incineration fly ash, 25-30% of clay and 40-50% of phosphorite tailings. The preparation method comprises the following steps: pretreating the raw materials before pulverization, pulverizing the raw materials, aging the raw materials, forming the raw materials, drying the blank, and sintering, thereby finally obtaining the sintered brick prepared from domestic waste incineration fly ash and phosphorite tailings. The invention implements recycling of domestic waste incineration fly ash and phosphorite tailings, and can destroy dioxin in fly ash in the sintering process, and the finished product with compact structure can fix heavy metals in the fly ash, thereby converting the fly ash into harmless substances.

Description

technical field [0001] The invention relates to a sintered brick, in particular to a sintered brick made from domestic waste incineration fly ash and phosphate rock tailings and a preparation method thereof. Background technique [0002] Waste incineration fly ash is a secondary pollutant (hereinafter referred to as fly ash) produced in the process of waste incineration, and its production rate is generally 2-5%. Fly ash is rich in harmful substances such as heavy metals, dioxins, and dissolved salts, and is listed as a hazardous waste by many countries. It needs to be pretreated before it can be landfilled or reused. [0003] At present, there are two main safe disposal methods for fly ash in China. One is to carry out solidification / stabilization treatment before entering the hazardous waste landfill; the other is to meet more stringent leaching indicators (domestic waste Landfill Pollution Control Standard (GB168892-2008)) can be sent to sanitary landfill for landfill. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C04B33/132C04B33/135C04B33/22
CPCY02P40/60
Inventor 张海英
Owner 珠海雄峰环保科技有限公司