Recycling and utilization of waste power plant slag

Recycling and utilization of waste power plant slag

With the acceleration of urbanization, urban waste treatment has become an important issue. As one of the main methods of urban waste treatment, garbage power plants have become an important component of urban waste treatment. However, the slag generated by garbage power plants is a challenge. How to recycle and utilize the slag generated by garbage power plants has become an urgent problem to be solved.

1、 Types and characteristics of slag

The slag generated by garbage power plants mainly includes fly ash, bottom slag, and gypsum generated from flue gas desulfurization and denitrification. Among them, fly ash refers to the solid particles that are drawn into the flue gas during the combustion process, bottom slag refers to the remaining solid substances after combustion, and gypsum refers to the solid waste generated by flue gas desulfurization and denitrification. The characteristic of these slag is that they contain a large amount of organic and inorganic substances, among which organic substances are mainly combustible substances and inorganic substances are mainly metals, glass, etc.

2、 Recycling and utilization methods of slag

1. Classification of slag

The recycling and utilization of slag requires first classifying the slag. Fly ash and bottom slag can be separated through screening, magnetic separation, pneumatic conveying, and other methods, while gypsum can be separated through sedimentation, filtration, and other methods. The classified slag can be recycled in different ways.

2. Utilization of slag

(1) Utilization of fly ash

Fly ash contains a large amount of organic and inorganic substances, which can be used in fields such as soil improvement, landscaping, and cement manufacturing. Among them, fly ash can be directly used for soil improvement, improving soil fertility and water retention capacity; It can also be used for garden greening as a nutritional source for plants; It can also be used in cement manufacturing to improve the strength and durability of cement.

(2) Utilization of bottom slag

The bottom slag contains a large amount of inorganic substances and can be used in fields such as roadbed construction and cement manufacturing. Among them, bottom slag can be used for roadbed construction to improve the strength and durability of the road surface; It can also be used in cement manufacturing to improve the strength and durability of cement.

(3) Utilization of gypsum

Gypsum contains a large amount of sulfate and calcium, which can be used in fields such as cement manufacturing and building materials manufacturing. Among them, gypsum can be used for cement manufacturing to improve the strength and durability of cement; It can also be used in the manufacturing of building materials to improve their strength and durability.

3、 Advantages of slag recycling and utilization

1. Resource utilization

The recycling and utilization of slag can convert waste into resources, achieve resource recycling, and reduce the exploitation and consumption of natural resources.

2. Environmental protection

The recycling and utilization of slag can reduce the pollution of waste to the environment and reduce the environmental impact of garbage power plants.

3. Economic benefits

The recycling and utilization of slag can reduce the operating costs of garbage power plants and improve economic benefits.

4、 Future Development of Slag Recycling and Utilization

With the acceleration of urbanization, the number and scale of garbage power plants will continue to increase, and slag recycling and utilization will become an important development direction. In the future, the technology and equipment for slag recycling and utilization will continue to be improved, and the recovery and utilization rate of slag will also continue to increase.

Conclusion

Slag Recycling of garbage power plant is an important work, which can realize the resource utilization of waste, reduce the consumption of natural resources, reduce the environmental impact of garbage power plant, and improve economic benefits. In the future, the technology and equipment for slag recycling and utilization will continue to be improved, and the recovery and utilization rate of slag will also continue to increase.

Recycling and utilization of waste power plant slag