Baking-free type refuse burning flyash haydite and manufacturing method thereof

A technology of waste incineration fly ash and ceramsite, applied in the fields of building materials and environmental engineering, can solve the problems of power consumption, high temperature treatment, high treatment cost, secondary pollution, etc., and achieve the effect of low equipment investment and low cost

Active Publication Date: 2009-02-04
TIANJIN YIMING ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these treatment methods can obtain high-quality building materials or can barely be used as resources, they all require high-temperature treatment, high treatment costs, secondary pollution, and large energy consumption, especially the melting method, which can consume waste incineration to generate electricity. The total electrical energy generated

Method used

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  • Baking-free type refuse burning flyash haydite and manufacturing method thereof
  • Baking-free type refuse burning flyash haydite and manufacturing method thereof
  • Baking-free type refuse burning flyash haydite and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The composition (dry weight) of the core 1 is: waste incineration fly ash 50%, ordinary portland cement 44.8%, fly ash 5%, heavy metal stabilizer 0.2%. The heavy metal stabilizer is sodium sulfide. Firstly, the waste is incinerated for chemical stabilization treatment. The heavy metal stabilizing agent is made into an aqueous solution with a mass concentration of 2%, and then sprayed into the waste incineration fly ash, the amount of the aqueous solution added is about 20% of the weight of the fly ash, and the mixture is uniformly stirred. Ordinary Portland cement, fly ash and fly ash stabilized by chemicals are measured and sent to a mixer, mixed with water, and then sent to a disc granulator 1 for rolling granulation to form a spherical core 1 . The diameter of the core 1 is controlled to be 5-15 mm by adjusting the rotation speed, inclination angle and water spray volume of the original disc granulator. Send the kernel 1 into the disc granulator 2, sprinkle portlan...

Embodiment 2

[0030] The composition (dry weight) of inner core 1 is: waste incineration fly ash 69.5%, Portland cement 30%, heavy metal stabilizing agent 0.5%, heavy metal stabilizing agent is the combination of sodium sulfide and mercapto collector, heavy metal stabilizing agent The concentration of ceramsite is 3.5%, the granulation method is extruding into ball granulation, the cladding material is lime powder, and the natural curing condition of ceramsite is 30 days under the condition of 15-25 ℃. All the other steps are the same as in Example 1. The simple compressive strength of the present embodiment waste incineration fly ash ceramsite is 5-7MPa, and bulk density is 900-950kg / m 3 .

Embodiment 3

[0032] The composition (dry weight) of inner core 1 is: waste incineration fly ash 60%, Portland cement 25%, fly ash 14.6%, heavy metal stabilizing agent 0.3%, heavy metal stabilizing agent is soluble phosphate and mercapto collector The combination, the concentration of the heavy metal stabilizer is 3.5%, the granulation method is extrusion into ball granulation, the cladding material is Portland cement, and the natural curing condition of the ceramsite is 20 days at 20-30°C. All the other steps are the same as in Example 1. The simple compressive strength of the ceramsite in this embodiment is 6-8MPa, and the bulk density is 900-950kg / m 3 .

[0033]As mentioned in the technical background, waste incineration fly ash is a solid hazardous waste, which contains heavy metals such as Pb, Cd, Cr, Cu, Zn and Ni, etc., and contains highly toxic organic pollutants such as dioxin (PCDD / Fs). Therefore, it is very important to conduct an environmental risk assessment of unfired ceram...

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Abstract

The invention provides a non-burned porcelain granule which adopts fly ash generated by waste incineration as the main raw material and a manufacturing method thereof; the non-burned porcelain granule comprises a spherical inner core 1 and a shell 2 attached outside; wherein, the components (dry weight) of the inner core 1 are as follows: 50 to 70 parts of fly ash generated by waste incineration, 25 to 50 parts of portland cement, 0 to 15 parts of coal ash and 0.2 to 0.5 part of heavy metal stabilized agent; the shell 2 adopts ordinary portland cement or lime. The method includes the following steps: firstly, the agent stabilization treatment is carried out on the fly ash generated by waste incineration; then the fly ash is mixed with the portland cement and coal ash to be granulated, thus manufacturing the inner core 1; finally, the inner core 1 is coated on the shell 2 in a pan granulator for natural curing. The method adopts the fly ash which is the dangerous waste as the raw material of the porcelain granule for resource utilization, realizes the harmlessness of the whole treatment process and has the advantages of economy, environmental protection and less investment of one-off equipment.

Description

technical field [0001] The invention relates to the technical field of environmental engineering and the field of building materials, in particular to non-burning ceramsite with waste incineration fly ash as the main raw material and a manufacturing method thereof. Background technique [0002] Municipal solid waste incineration technology has the advantages of complete disinfection, significant weight reduction, and heat recovery. As an alternative technology to landfill, it is developing rapidly in China. At present, the waste incinerated accounts for about 10% of the total waste in my country. However, the waste incineration process will produce solid hazardous waste fly ash (accounting for 2-5% of the waste incineration), which contains heavy metals with high leaching concentrations, such as Pb, Cd, Cr, Cu, Zn and Ni, etc., and contains Highly toxic organic pollutant dioxins (PCDD / Fs). According to international practice, these fly ash must be harmless before final dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/08
CPCC04B20/1077C04B18/021C04B2111/00017C04B20/107Y02W30/91C04B18/08C04B18/081
Inventor 郝辉
Owner TIANJIN YIMING ENVIRONMENTAL TECH CO LTD
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