Method for preparing aggregates with high apparent density through industrial waste residues

A technology of apparent density and industrial waste residue, which is applied in the field of building materials to achieve the effects of alleviating supply shortages, being conducive to environmental protection and reducing development

Active Publication Date: 2016-06-29
天津朝阳环保科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the resource utilization of industrial waste residue has become a research hotspot. The resource utilization of waste incineration ash is mainly based on waste incineration ash as raw material to burn cement clinker or ceramsite. Ceramsite is a kind of lightweight aggregate for construction. Replace traditional crushed stones, river pebbles, etc. to make lightweight aggregate concrete products such as lightweight panels; the resource utilization of chromium slag, lead slag, and nickel slag is mainly to use them as admixtures for building materials, and waste There are very few studies on the co-processing of incineration ash and other industrial wastes to make aggregates with high apparent density

Method used

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  • Method for preparing aggregates with high apparent density through industrial waste residues

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Embodiment 1

[0021] Take 50% of garbage incineration ash, 5% of chromium slag, 5% of lead slag, 5% of nickel slag, and 35% of clay by weight, and grind it to less than 100 microns; then add water accounting for 14% of the weight of the solid material, and stir to form a uniform Put the slurry into a molding machine, and extrude it into a 0.8cm ball with a pressure of 15MPa; put the prepared ball into a drying oven, and dry it at 105°C for 12 hours. Put the dried pellets into the muffle furnace, raise the temperature up to 300°C at a rate of 6°C / min, keep it warm for 20 minutes, then raise the temperature up to 1000°C at a rate of 8°C / min, and then increase the temperature from 3°C / min The heating rate is raised from 1000°C to 1175°C, and the calcination is completed at 1175°C for 20 minutes; the pellets are naturally cooled to room temperature in the muffle furnace to obtain aggregates with high apparent density.

[0022] The apparent density of the obtained aggregate is 2700Kg / m 3 .

Embodiment 2

[0024] Take 20% of waste incineration ash, 7% of chromium slag, 25% of lead slag, 8% of nickel slag, and 40% of clay by weight, and grind it to less than 100 microns; then add water accounting for 18% of the weight of the solid material, and stir to form a uniform Put the slurry into a molding machine, and extrude it into a 1.2cm ball with a pressure of 8MPa; put the prepared ball into a drying oven, and dry it at 105°C for 12 hours. Put the dried pellets into the muffle furnace, raise the temperature up to 300°C at a rate of 4°C / min, keep it warm for 30 minutes, then raise the temperature up to 1000°C at a rate of 8°C / min, and then increase the temperature by 3°C / min The heating rate is raised from 1000°C to 1150°C, and the calcination is completed at 1150°C for 10 minutes; the pellets are naturally cooled to room temperature in the muffle furnace to obtain aggregates with high apparent density.

[0025] The apparent density of the obtained aggregate is 2800Kg / m 3 .

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Abstract

The invention discloses a method for preparing aggregates with the high apparent density through industrial waste residues. The method comprises the steps that 10-50% of waste incineration ash, 1-40% of chromium slag, 1-40% of nickel slag, 1-50% of lead slag, 10-60% of clay and other industrial waste residue soil are uniformly mixed and ground into powder, water is added for stirring to be uniform, and the aggregates with the high apparent density are obtained through burning by means of the technologies such as extrusion pelletization, drying, calcination and cooling; resource utilization of industrial waste residues is achieved, the scientific and effective way is provided, and the obtained aggregates with the high apparent density can be used for preparing concrete.

Description

technical field [0001] The invention relates to a method for disposing and utilizing industrial waste residues, in particular to a method for preparing aggregates with high apparent density from industrial waste residues, and belongs to the technical field of building materials. Background technique [0002] The amount of urban domestic waste in my country is increasing at a rate of 8% to 10% per year, and waste disposal has become an imminent problem. Waste incineration has become a science of waste disposal due to its advantages of large capacity reduction, harmlessness, and resource utilization. effective method. However, waste incineration will produce a large amount of ash, including fly ash and bottom ash. Fly ash is considered a dangerous solid waste because it contains a large amount of toxic heavy metals and dioxins. The incineration ash is solidified and stabilized. In addition, with the development of the metallurgical industry, industrial waste residues (such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02
CPCC04B18/023C04B14/10C04B18/10C04B18/141
Inventor 张磊张亚楠荣辉王雪平杨久俊
Owner 天津朝阳环保科技集团有限公司
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