With the acceleration of China's industrialization process, the power industry is also constantly developing. As a harmful waste, power plant slag has caused serious pollution to the environment. In order to protect the environment, the resource utilization of power plant slag has become a current hot topic.
1、 Types of slag in power plants
The slag of power plants is mainly divided into two types: coal combustion slag and gas combustion slag.
Coal combustion slag refers to the ash and coal slag generated during the combustion of coal. Among them, ash refers to the non combustible part of coal during combustion, while coal slag refers to impurities such as minerals in coal.
Gas combustion slag refers to the waste generated during the combustion of natural gas, liquefied gas, and other gases.
2、 Hazards of power plant slag
The main harm of power plant slag lies in its pollution to the environment. Coal combustion slag contains a large amount of heavy metals, such as lead, mercury, cadmium, etc., which cause significant pollution to soil and water sources. At the same time, coal combustion slag also contains a large amount of harmful gases such as sulfur dioxide and nitrogen oxides, which can cause pollution to the atmospheric environment.
Gas combustion slag contains a large amount of iron oxide and aluminum oxide, which can have an impact on soil and water sources. At the same time, gas combustion slag also contains a large amount of greenhouse gases such as carbon dioxide, which will exacerbate global climate change.
3、 Resource utilization of slag in power plants
In order to reduce the harm of power plant slag to the environment, we can treat it through resource utilization.
1. Resource utilization of coal combustion slag
Coal combustion slag contains a large amount of minerals and nutrients, such as potassium, phosphorus, etc., and can be used as fertilizer. At the same time, coal combustion slag can also be used for manufacturing building materials, cement, etc.
2. Resource utilization of gas combustion slag
Gas combustion slag contains a large amount of iron oxide and aluminum oxide, which can be used to manufacture materials such as ceramics and glass. At the same time, gas fired slag can also be used to manufacture building materials such as cement and concrete.
4、 Operation steps for resource utilization of slag in power plants
1. Resource utilization of coal combustion slag
(1) Screening: Screen the coal combustion slag to remove impurities.
(2) Processing: The coal combustion slag is processed and processed to produce fertilizers, building materials, etc.
2. Resource utilization of gas combustion slag
(1) Screening: Screen the gas combustion slag to remove impurities.
(2) Processing: Process the gas combustion slag to produce materials such as ceramics and glass, or to produce building materials such as cement and concrete.
5、 Conclusion
The resource utilization of power plant slag is a necessary measure to protect the environment. By utilizing coal combustion slag and gas combustion slag as resources, the harm to the environment can be reduced, while also creating more economic value. We should actively promote the resource utilization of power plant slag and jointly protect our environment.
