With the continuous acceleration of urbanization, the issue of garbage has become an important topic. Incineration is a common method in garbage disposal. When burning garbage, a large amount of slag is generated. The slag contains a certain amount of metal, and if not recycled, it will not only waste resources but also cause pollution to the environment. This paper will introduce the methods and steps of metal recovery from Incineration plant slag.
1、 Significance of metal recovery from slag of Incineration plant
The significance of slag metal recovery in Incineration plant lies in the recovery and utilization of resources. The slag contains various metal elements, such as iron, copper, aluminum, etc. These metal elements can be recycled to save resources and reduce pollution. Meanwhile, the metal elements in the slag are usually high in content and can be recycled as raw materials for the production of new products.
2、 Methods of metal recovery from Incineration plant slag
The methods of metal recovery from Incineration plant slag mainly include physical methods and chemical methods.
1. Physical methods
The physical method of mainly separates metal elements from slag through mechanical sorting, gravity separation, and other methods. This method is relatively simple, but its efficiency is low, and only some metal elements can be separated.
2. Chemical methods
Chemical methods mainly use chemical reactions to extract metal elements from slag. This method is highly efficient, but requires the use of some chemical reagents, and the treated waste liquid also needs to be treated.
3、 Steps of slag metal recovery in Incineration plant
The steps of slag metal recovery in Incineration plant mainly include the following aspects:
1. Slag collection
Firstly, it is necessary to collect the slag generated by incineration. The slag is usually cooled before being collected. The collected slag needs to undergo preliminary treatment to remove impurities.
2. Slag crushing
Next, it is necessary to crush the slag. The metal elements in slag usually exist in the form of particles and need to be broken into smaller particles for subsequent treatment.
3. Metal sorting
After crushing, it is necessary to separate the metal elements in the slag. Physical or chemical methods can be used for sorting. Physical methods mainly separate metal elements from slag through methods such as gravity separation and magnetic separation. Chemical methods mainly use chemical reactions to extract metal elements from slag.
4. Metal extraction
Finally, it is necessary to extract the selected metal elements. The extraction method can be different based on different metal elements. For example, methods such as electrolysis and leaching can be used to extract metal elements.
4、 Application of slag metal recovery in Incineration plant
The slag metal of Incineration plant can be used as raw materials to produce new products after recycling. For example, the recycled iron element can be used to produce steel, and the recycled aluminum element can be used to produce aluminum alloys, etc. At the same time, the recycled metal elements can also be used as renewable resources for the production of new electronic products, automotive components, etc.
The metal recovery from the slag of Incineration plant is an important way of Recycling. By using physical and chemical methods, the metal elements in the slag can be separated, achieving the goal of saving resources and reducing pollution. In practical applications, different extraction methods need to be used based on different metal elements to achieve the optimal results.