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All-solid waste filling material for stabilizing dioxin-containing incineration fly ash and preparation method thereof

A technology for incinerating fly ash and filling material, applied in the field of all-solid waste filling material and preparation, can solve the problems of pollution cost, low early strength, high cost of cement filling and mining, and achieve the effect of saving land

Active Publication Date: 2020-09-01
北科蕴宏环保科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides an all-solid waste filling for stabilizing dioxin-containing incineration fly ash and a preparation method to solve the problems of high mining cost, large cement consumption, and low early strength of existing cemented filling; bulk industrial solid waste, such as tailings A large amount of storage of sand, slag, steel slag, and industrial by-product gypsum causes resource waste and environmental pollution, as well as problems such as high cost, large capacity increase ratio, and large area of ​​safe landfill during the safe disposal of waste incineration fly ash.

Method used

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  • All-solid waste filling material for stabilizing dioxin-containing incineration fly ash and preparation method thereof
  • All-solid waste filling material for stabilizing dioxin-containing incineration fly ash and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] An all-solid waste filling material is prepared from the following raw materials in weight percentage:

[0041] Slag 70%

[0042] Desulfurized gypsum 15%

[0043] Waste incineration fly ash 15%

[0044] A preparation method for all-solid waste filling materials used for stabilizing dioxin-containing waste incineration fly ash, specifically: adding water and mixing the activated cement, aggregate and water reducing agent evenly, the specific steps are as follows:

[0045] (1) Dry the required raw material slag, steel slag, industrial by-product gypsum, and waste incineration fly ash to a moisture content of 0.01% to 0.1%, and then dry the slag, desulfurized gypsum, and waste incineration fly ash by weight percentage on a dry basis. 70%, 15%, and 15% are individually ground to a specific surface area of ​​380, 315, and 120m 2 / Kg mixes in the blender and makes cementing agent;

[0046] (2) The weight ratio of cement / aggregate is 1 / 4, the mass fraction of slurry is 80%...

Embodiment 2

[0060] An all-solid waste filling material is prepared from the following raw materials in weight percentage:

[0061] Slag 20%

[0062] Steel slag 5%

[0063] Phosphogypsum 5%

[0064] Granulated ferrochrome slag 15%

[0065] Waste incineration fly ash 55%

[0066] A preparation method for stabilizing all-solid waste filling materials containing dioxin-containing waste incineration fly ash, the details are as follows: the activated cement, aggregate and water reducing agent are mixed evenly with water, and the specific steps are as follows:

[0067] (1) Dry the required raw materials slag, steel slag, phosphogypsum, granulated ferrochrome slag, and waste incineration fly ash to a moisture content of 0.01% to 0.1%, and then dry the slag, steel slag, phosphogypsum, and granulated ferrochrome slag , Garbage incineration fly ash is separately ground to a specific surface area of ​​380, 350, 325, 405, 150m3 at 20%, 5%, 5%, 15%, 55% by weight percentage on a dry basis 2 / Kg mi...

Embodiment 3

[0082] A filling material for mines, prepared from the following raw materials in weight percent:

[0083]

[0084] A preparation method for stabilizing all-solid waste filling materials containing dioxin-containing waste incineration fly ash, the details are as follows: the activated cement, aggregate and water reducing agent are mixed evenly with water, and the specific steps are as follows:

[0085] (1) Dry the required raw materials slag, fluorine gypsum, carbide slag, and waste incineration fly ash to a moisture content of 0.01% to 0.1%, and then dry the slag, fluorine gypsum, calcium carbide slag, and waste incineration fly ash by weight percentage on a dry basis Separately grind at 35%, 5%, 10%, and 50% to specific surface areas of 400, 280, 320, and 100m 2 / Kg and mixed in a blender to prepare the cement;

[0086] (2) The weight ratio of cement / aggregate is 1 / 3, the mass fraction of slurry is 76%, and the qualified cemented filling material for mine can be obtained b...

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Abstract

The invention provides an all solid waste filling material for stabilizing dioxin incineration fly ash and a preparation method thereof, and belongs to the technical field of solid waste utilization. The filling material comprises a cementing agent and an aggregate, and the cementing agent comprises ore slag, steel slag, industrial by-product gypsum, waste incineration fly ash and the like, and the aggregate comprises mountain sand, river sand, tailing sand or waste rocks and the like. The cementing agent is activated, and evenly mixed in a mixer, according to the weight ratio of cementing agent to aggregate of 1 / 1 to 1 / 10, 0% to 1% of a water reducing agent is added, the mass fraction of slurry is 65%-82%, and the qualified filling material can be obtained by even stirring. The cementing filling material for mines is prepared from the all solid waste system, meanwhile the dioxin-containing waste incineration fly ash can be stabilized, and the environmental problems caused by the waste incineration fly ash dioxin and a large amount of lands required for waste landfill can be solved.

Description

technical field [0001] The invention relates to the technical field of solid waste utilization, in particular to an all-solid waste filling material for stabilizing dioxin-containing incineration fly ash and a preparation method thereof. Background technique [0002] The current industrial system is actually a process of mining resources and discharging waste. Mining activities are the main source of waste discharge to the environment, and its solid waste discharge accounts for 80% to 85% of industrial waste discharge. Tailings, waste rock, coal gangue, fly ash and smelting slag produced during the development and utilization of domestic mineral resources have become the largest industrial solid waste discharge, accounting for 85% of the total solid waste discharge in the country. Mine mining left a large area of ​​mined-out area, stacked waste rocks, waste slag yards and constructed tailings dams, which brought serious safety hazards and environmental loads. Effective joi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
CPCC04B28/142C04B28/143C04B28/144C04B2111/00724C04B2111/00784C04B2201/50C04B18/141C04B18/142C04B18/105C04B18/12C04B2103/302C04B18/144C04B22/064C04B14/068
Inventor 倪文高巍李云云王珂鄢琪慧张钰莹
Owner 北科蕴宏环保科技(北京)有限公司
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