Screening of gold from waste power plant slag

Screening of gold from waste power plant slag

With the continuous acceleration of urbanization, the problem of garbage is becoming increasingly serious. Garbage power plants have been widely used as a way of treating garbage. However, garbage power plants generate a large amount of slag, which causes significant environmental pollution. However, slag also contains a certain amount of metals, such as copper, aluminum, zinc, etc., which can be recycled. This article will introduce the operational steps for screening gold from waste power plant slag.

1、 The principle of screening slag gold

Slag gold screening is a method of metal separation that utilizes differences in physical and chemical properties. Metals in slag generally exist in the form of compounds, such as oxides, sulfides, etc. The physical and chemical properties of these compounds are different from those of the slag itself, so these metals can be separated from the slag through certain methods.

2、 Operating steps for screening slag gold

1. Preparation of slag samples

Firstly, a certain amount of slag samples need to be collected from the waste power plant. Attention should be paid to avoiding contamination of the sample during collection to avoid affecting subsequent experimental results. The collected samples need to be dried, ground, and other treatments to facilitate subsequent experimental operations.

2. Chemical analysis of slag samples

The slag sample contains multiple metals and requires chemical analysis to determine the content of each metal. Chemical analysis generally adopts flame Atomic absorption spectroscopy, Inductively coupled plasma mass spectrometry, etc.

3. Physical separation of slag samples

Mix the slag sample with a certain amount of water to form a mud like substance. Then place the mud into a centrifuge for centrifugal separation, separating the mud into two layers: upper and lower. The upper layer is water, and the lower layer is slag. Remove the slag from the lower layer and place it in a sieve for screening. When screening, attention should be paid to the pore size of the sieve to facilitate the separation of slag with different particle sizes.

4. Separation of slag metal

Acid wash the separated slag to reduce the metal ions into metals. Then, the reduced metal is electrolyzed and separated to obtain pure metal.

3、 Conclusion

Through the above experimental operations, the metal in the slag of garbage power plants can be separated and recycled. This not only benefits the conservation and utilization of resources, but also reduces environmental pollution. Therefore, the slag gold screening technology has great application prospects.

In short, the gold screening technology for waste power plant slag is a beneficial technology for environmental protection and resource utilization. Through the introduction of this article, it is believed that readers have a deeper understanding of slag gold screening technology.

Screening of gold from waste power plant slag