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Use of fly ash from burning city domestic garbage

A technology for municipal solid waste and incineration fly ash, applied in the field of waste recycling, can solve the problems of low added value of fly ash recycling products, high cost of fly ash recycling, leaching of heavy metal ions, etc. The effect of reducing the leaching concentration and the small original particle size

Inactive Publication Date: 2006-08-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above utilization methods fail to solve practical engineering problems: (1) The leaching of heavy metal ions in fly ash after recycling is always worrying; (2) The cost of recycling fly ash is too high to be suitable for mass production; (3) The added value of fly ash resource products is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, ultrafinely pulverize the waste incineration fly ash to 500 mesh, take 100 grams of dried fly ash powder, put it into the grinding tank of the planetary ball mill, mix it with the grinding beads at a mass ratio of 1:3, and inject 2.5 ml of single ten dialkyl phosphate; then stirred at a speed of 450 rpm for 10 minutes, sieved and separated the grinding beads, and sealed the modified fly ash powder for storage.

[0020] The modified fly ash powder is mixed with the polypropylene base material at a mass ratio of 20%, added with 10% of plasticizer and other auxiliary agents to extrude and granulate, and finally injection molded as required. After testing, the mechanical properties of fly ash-filled polypropylene products meet the technical indicators in the national standards; EPA TCLP leaching toxicity test was used to test fly ash polypropylene products, and the results showed that the leaching concentration of heavy metals was lower than the standard limit .

Embodiment 2

[0022] First, ultrafinely pulverize the waste incineration fly ash to 1200 mesh, take 100 grams of dried fly ash powder, put it into the grinding pot of the planetary ball mill, mix it with the grinding beads at a mass ratio of 1:3, and inject 3.0 ml of lauroyl Sodium sarcosinate; then stirred at a speed of 450 rpm for 15 minutes, sieved and separated the grinding beads, and sealed the modified fly ash powder for storage.

[0023] The modified fly ash powder is mixed with the polypropylene base material at a mass ratio of 15%, extruded and granulated by adding 15% of plasticizer and other auxiliary agents, and finally injection molded as required. Alternatively, the modified fly ash powder is mixed with the polypropylene base material at a mass ratio of 15%, and 10% plasticizer and other auxiliary agents are added to extrude and granulate, and finally injection molded as required.

[0024] The above-mentioned fly ash-filled polypropylene products were completed in a plastic fa...

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PUM

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Abstract

The present invention relates to new use of fly ash from burning city domestic garbage, and the fly ash is used as stuffing for polymer material after being activated with surfactant in a dry process. Fly ash is first crushed to 500-1200 mesh and stoved, and then mixed with surfactant in the ratio of 100 to 1-5 inside a ball mill through grinding for 5-30 min, with the modified fly ash being preserved hermetically. The modified fly ash in 10-15 wt% is added into polypropylene base material to produce product reaching relevant standard. The present invention has wide material source, low cost, no secondary pollution caused by the activation treatment and excellent market foreground.

Description

technical field [0001] The invention relates to a new application of municipal solid waste incineration fly ash, specifically uses municipal solid waste incineration fly ash as filler of polymer materials, and belongs to the technical field of waste resource utilization. Background technique [0002] With the rapid development of my country's national economy, people's living standards have been greatly improved, and the amount of urban solid waste has increased sharply. Statistical data show that in 2003, the volume of domestic waste removal and transportation in the country was as high as 148.57 million tons, an increase of 8.8% over the previous year, which has seriously threatened and affected the environment on which human beings depend for survival. [0003] Waste incineration is a method of high-temperature thermochemical treatment of waste under aerobic conditions. It has many advantages such as small footprint, high volume reduction rate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/08C08K9/04
Inventor 何品晶张后虎邵立明章骅
Owner TONGJI UNIV
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