How to choose metals for garbage and slag

How to choose metals for garbage and slag

Garbage slag refers to the solid waste generated in Incineration, which contains a large number of metal elements. These metal elements can be recycled and utilized through mineral processing, but due to the complex composition of waste slag, selecting metals requires certain skills and methods. This article will introduce the methods and steps for selecting metals from waste slag.

1、 Composition analysis of waste slag

Before selecting metals for waste slag, it is first necessary to conduct a composition analysis of the waste slag. The metal elements in waste slag mainly include copper, aluminum, zinc, iron, etc. The content of these metal elements varies, so separate treatments are needed when selecting metals.

2、 Metal selection method for waste slag

1. Magnetic separation method

Magnetic separation is a commonly used method for selecting metals. In the waste slag, the content of iron is relatively high, and iron can be separated by magnetic separation. The specific operation steps are as follows:

(1) Put the waste slag into the magnetic separator.

(2) The magnets in the magnetic separator will adsorb iron elements and separate the iron.

(3) Recycle the iron after magnetic separation.

2. Flotation method

Flotation method is a method of separating metals from non-metals. Metal elements such as copper, aluminum, and zinc can be separated from waste slag by flotation. The specific operation steps are as follows:

(1) Mix garbage and slag with water to form a suspension.

(2) Add a bubbling agent to combine the metal elements in the suspension with bubbles and float to the liquid surface.

(3) Recycling the floating metal elements.

III. Precautions for selecting metals from waste slag

1. When selecting metals from waste slag, different treatments need to be carried out based on the composition of the waste slag to avoid wasting valuable metal elements.

When conducting magnetic separation, it is necessary to pay attention to the magnetic strength of the magnetic separator to avoid misjudging non ferrous elements as iron elements.

3. When using flotation method, it is necessary to pay attention to the amount of bubble agent to avoid insufficient binding of metal elements with bubbles, which may affect the separation effect.

4、 Conclusion

Garbage slag contains a large amount of metal elements, which can be recycled through mineral processing to reduce environmental pollution and save resources. When selecting metals from waste slag, different treatments need to be carried out based on the composition of the waste slag, and attention should be paid to the methods and precautions for selecting metals.

How to choose metals for garbage and slag