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Method for manufacturing foamed bricks based on construction waste soil

A technology of engineering dregs and foam bricks, which is applied in the field of waste utilization, can solve problems such as environmental pollution, surrounding surface water and groundwater pollution, and achieve the effects of reducing environmental pollution and improving mechanical properties

Inactive Publication Date: 2016-06-29
CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: in view of the leachate or leachate produced by the fermentation of domestic garbage mixed in and the showering of rainwater and the immersion of surface water and groundwater during the stacking and landfill process of current engineering dregs, resulting in Serious pollution of surrounding surface water and groundwater, and serious environmental pollution, the present invention firstly removes light impurities and metal impurities in engineering dregs by manual screening and magnetic separation, and then combines them with hydrogen peroxide under high temperature and high pressure Mixing reaction to remove harmful substances and microorganisms, and then mix them with kaolin, feldspar particles, etc., supplemented with foaming agents, adhesives and other additives, and finally roast to prepare foam bricks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] First remove the plastic, glass and rubber impurities in the construction dregs by manual screening, then dry them naturally, put them into a brick crusher for crushing when the water content reaches 5%, and sieve to obtain a 20-mesh project The slag particles are put into a magnetic separator, and after the metal impurities are removed, they are mixed with hydrogen peroxide with a mass fraction of 5% according to a material-to-liquid mass ratio of 1:2; the above-mentioned container is pressurized to 0.5MPa, Heat to 120°C, keep the temperature for 50 minutes, then cool naturally to room temperature, remove the impurities floating on the liquid surface, then filter, collect the filtrate and put it in an air dryer to air dry to obtain pretreated engineering slag; take 1kg of pretreated engineering slag Soil, 700g of 80-mesh kaolin, 120g of 100-mesh bamboo powder and 210g of 100-mesh feldspar particles were mixed evenly, put into a calcination furnace at 900°C for 30 minute...

example 2

[0023] First remove the plastic, glass and rubber impurities in the construction dregs by manual screening, and then dry them naturally. When the water content reaches 10%, put them into a brick crusher for crushing, and sieve to obtain a 20-mesh project. The slag particles are then put into a magnetic separator, and after the metal impurities are removed, they are mixed with hydrogen peroxide with a mass fraction of 5% according to a material-to-liquid mass ratio of 1:2; the above-mentioned container is pressurized to 0.7MPa, Heating to 150°C, keeping the temperature for 70 minutes, then naturally cooling to room temperature, removing impurities floating on the liquid surface, and then filtering, collecting the filtrate and putting it in an air dryer to air dry to obtain pretreated engineering slag; take 3kg of pretreated engineering slag Soil, 800g 80-mesh kaolin, 150g 100-mesh bamboo powder and 260g 100-mesh feldspar particles were mixed evenly, put into a calcination furnac...

example 3

[0026]First remove the plastic, glass and rubber impurities in the construction dregs by manual screening, and then dry them naturally. When the water content reaches 8%, put them into a brick crusher for crushing, and sieve to obtain a 20-mesh project. The slag particles are then put into a magnetic separator, and after the metal impurities are removed, they are mixed with hydrogen peroxide with a mass fraction of 5% according to a material-to-liquid mass ratio of 1:2; the above-mentioned container is pressurized to 0.6MPa, Heat to 140°C, keep the temperature for 60 minutes, then cool naturally to room temperature, remove impurities floating on the liquid surface, then filter, collect the filtered matter and put it in an air dryer to air dry to obtain pretreated engineering slag; take 2kg of pretreated engineering slag Soil, 780g 80 mesh kaolin, 140g 100 mesh bamboo powder and 230g 100 mesh feldspar particles are mixed evenly, put into a calcination furnace at 900°C for 35min,...

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Abstract

The invention relates to a method for preparing foam bricks based on engineering dregs, and belongs to the technical field of waste utilization. The present invention aims at leachate or leachate produced by the fermentation of domestic garbage mixed in and the showering of rainwater and the immersion of surface water and groundwater in the process of stacking and landfilling the current engineering dregs, causing damage to the surrounding surface water and groundwater. Serious pollution, and the problem of serious environmental pollution, the present invention first removes light impurities and metal impurities in engineering dregs by manual screening and magnetic separation, and then mixes them with hydrogen peroxide at high temperature and high pressure to remove harmful impurities. Substances and microorganisms, and then mixed with kaolin, feldspar particles, etc., supplemented with foaming agents, adhesives and other additives, and finally roasted to prepare foam bricks.

Description

technical field [0001] The invention relates to a method for preparing foam bricks based on engineering dregs, and belongs to the technical field of waste utilization. Background technique [0002] Engineering slag is mainly composed of soil, scattered mortar and concrete fragments, bricks and stones produced by chiseling, scrap metal, bamboo wood, waste generated in the process of building decoration, various packaging materials and other wastes, etc. , the proportion of soil is about 60%. Since the muck contains a lot of alkaline concrete, which seriously affects the growth of crops, it is generally used for deep pit landfill, and the disposal occupies a large area. [0003] Although most cities have fixed spoil points, with the continuous expansion of the urbanization process, the discharge of construction waste has increased year by year, seriously affecting the urban environment. Therefore, the government has issued relevant construction waste management measures, requ...

Claims

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Application Information

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IPC IPC(8): C04B28/08C04B38/10C04B18/02
CPCC04B28/08C04B18/023C04B2201/20C04B2201/32C04B2201/50
Inventor 王力威宋国
Owner CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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