Method for forming refuse-firing flyash

Abstract

The invention is concerned with a molding method to fly ash of burning garbage. Add 2 to 15 percent of additive and mix with 5 to 7 percent of water, and make into ball with ball making machine and maintain the ball at nature condition. The formulation of additive is 2 to 10 percent of common portland cement with 425 size or 3 to 10 percent slaked lime and 1 to 5 percent industry syrup. The powder fly ash is disposed into ball by physics and chemistry denaturalization disposal to improve the metallurgy capability of stuff. The lixiviating toxicity of fly ash reduces greatly and the lixiviating concentration to all kind of heavy metal is lower than the standard without the second time of pollution. The anti-press intention of fly ash ball reaches the demand of transport and fusion to separate heavy metal.

Description

technical field [0001] The invention relates to a treatment method for waste incineration fly ash, in particular to a method for molding waste incineration fly ash so that no secondary pollution occurs during transportation and storage, and the compressive strength fully meets the requirements of transportation and melting separation. technical background [0002] Garbage incineration will produce a large amount of fly ash, which contains a large amount of heavy metals. If it is not handled properly, it will leach toxic substances and cause secondary pollution. In the prior art, the usual treatment methods for a large amount of fly ash produced in waste incineration are: 1) cement solidification. Although this technology has many advantages, the most critical problem is that due to the heavy metals in the final solidification body still exist, solidification The heavy metals in the body may still leach and re-enter the environment under different chemical conditions, causing...

AI Technical Summary

Problems solved by technology

[0002] Garbage incineration will produce a large amount of fly ash, which contains a large amount of heavy metals. If it is not handled properly, it will leach toxic substances and cause secondary pollution.

In the prior art, the usual treatment methods for a large amount of fly ash produced in waste incineration are: 1) cement solidification. Although this technology has many advantages, the most critical problem is that due to the heavy metals in the final solidification body still exist, solidification The heavy metals in the body may still leach and re-enter the environment under different chemical conditions, causing unpredictable impact on the environment

2) The melting and solidification method is to directly heat the fly ash to a molten state to make it form a glass body to stabilize heavy metals. This method not only consumes a lot of energy, but also has high leaching toxicity, which is easy to carry out during transportation and smelting. produce secondary pollution

1. Stabilizers are expensive

2. High processing costs

3. The process is complex and immature