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Multi-functional permeable brick of domestic waste incineration slag and preparation method thereof

A domestic waste incineration and multi-functional technology, which is applied in the field of domestic waste incineration slag multi-functional permeable bricks and its preparation, can solve the problems of single function of permeable bricks, improve utilization value, overcome utilization rate and low value, and overcome product The effect of a single function

Active Publication Date: 2021-11-02
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above defects in the prior art or the need for technical improvement, the purpose of the present invention is to provide a multi-functional permeable brick for domestic waste incineration slag and its preparation method, wherein the pretreatment method of domestic waste incineration slag (washing, ball milling, screening ), the allocation of auxiliary materials, and the specific parameters of each subsequent processing step (forming method, forming pressure and static pressure time, shape of the mold pressure head, thickness ratio of each layer, etc.) are improved. Compared with the existing technology, it can solve the existing problems The problem of the single function of preparing permeable bricks from slag, the present invention can realize the preparation of a multi-functional integrated permeable brick with a surface layer that is a macropore strength strengthening layer, a middle layer that is permeable and strengthens the adsorption layer, and a lower layer that is microporous and strengthens the adsorption layer, so that it has excellent strength. At the same time, it also has the effect of intercepting, adsorbing and curing runoff pollutants

Method used

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  • Multi-functional permeable brick of domestic waste incineration slag and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Raw materials

[0042] Pretreatment of domestic waste incinerator slag: Stir and wash the domestic waste incinerator slag matured for more than 90 days with water for 3 times at a solid-to-liquid ratio of 1:3 to remove scum. The cleaned slag is ball milled and sieved to remove large particles > 9.5 mm. Further obtain 0.075~1.18mm, 0.85~2.36mm, 2.36~9.5mm domestic waste incineration slag for future use.

[0043] Aggregate: 0.3~1.18mm blast furnace slag, 0.6~1.70mm sludge ash; sludge ash using conventional municipal sludge ash or river and lake bottom mud ash.

[0044] Additives: 0.15~0.425mm calcined vermiculite powder; 0.5~1.5mm length of waste glass fiber;

[0045] (2) Ingredients are proportioned by weight fraction

[0046] Surface base material: 2.36~9.5mm domestic waste incineration slag 50%, 32.5# cement 20%, 0.6~1.70mm sludge ash 24%, length 0.5~1.5mm waste glass fiber 1%;

[0047] Middle base material: 0.85~2.36mm domestic waste incineration slag 45%, cem...

Embodiment 2

[0054] (1) Raw materials

[0055] Pretreatment of domestic waste incineration slag: Stir and wash the domestic waste incineration slag aged for more than 60 days with water at a solid-to-liquid ratio of 1:6 twice to remove scum. The cleaned slag is ball milled and sieved to remove large particles > 9.5 mm. Further obtain slags of 0.075~1.18mm, 0.85~2.36mm, and 2.36~9.5 mm for later use.

[0056] Aggregate: 0.3~1.18mm blast furnace slag, 0.6~1.70mm waste ceramics;

[0057] Additives: 0.15~0.425mm calcined vermiculite powder; 0.5~1.5mm length of waste glass fiber;

[0058] (2) Ingredients are proportioned by weight fraction

[0059] Surface base material: 40% of 2.36~9.5mm domestic waste incineration slag, 30% of 42.5# cement, 29.5% of 0.3~1.18mm blast furnace slag, 0.5% of waste glass fiber with a length of 0.5~1.5mm;

[0060] Middle layer base material: 48% of 0.85~2.36mm domestic waste incineration slag, 25% of cement, 25% of 0.6~1.70mm waste ceramics, 2% of 0.15~0.425mm ...

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Abstract

The invention discloses a multifunctional water-permeable brick for domestic waste incineration slag and a preparation method thereof, belonging to the field of solid waste resource utilization. Washing, ball milling, and grading pretreatment of domestic waste incineration slag are supplemented with aggregates and additives such as blast furnace slag, waste ceramics, sludge ash, etc., and a multi-layer functional integrated permeable brick is prepared by layered pressing. The surface layer of the permeable brick is a macropore strength strengthening layer, a middle layer permeable and strengthened adsorption layer, and a lower microporous strengthened adsorption layer. The multifunctional permeable brick obtained in the present invention has different functions of different layers, thereby achieving the function of adsorbing pollutants and heavy metals in permeable water, and reducing secondary pollution. The permeable brick of the invention has high strength, strong functionality, simple production method and good applicability.

Description

technical field [0001] The invention belongs to the technical field of urban solid waste treatment, and in particular relates to a multifunctional water-permeable brick from domestic waste incineration slag and a preparation method thereof. Background technique [0002] At present, my country's domestic waste reduction, recycling, and harmless treatment methods mainly include landfill, incineration, and composting. The incineration method is a high-temperature heat treatment technology, that is, a certain amount of excess air and garbage are oxidized and burned in a high-temperature (800°C~1000°C) incinerator. The incineration method has a very significant effect on reducing the amount of domestic waste. Generally, the waste can be reduced by 70% and the volume by 90%. Waste incineration technology Waste incineration has the characteristics of significant volume reduction effect and thorough harmlessness. When the waste heat value is high, and the treatment reaches a certai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B38/00
CPCC04B28/00C04B2111/00284C04B2111/00612C04B2201/50C04B18/10C04B18/103C04B18/0481C04B38/0041C04B14/202C04B18/141C04B18/165
Inventor 时亚飞吴志华周汉孔华泽徐欣智和王波黎甜李晓冉张会琴皮科武肖衡林刘德富
Owner HUBEI UNIV OF TECH