Comprehensive utilization technology of slag in power plants

Comprehensive utilization technology of slag in power plants

In modern industrial production, power plant slag is an inevitable product. With the development of industry, the output of slag is also constantly increasing. If left untreated, slag can cause significant environmental pollution and waste resources. Therefore, the research and application of comprehensive utilization technology for power plant slag is of great significance.

1、 Classification of slag

Slag refers to a mixture of metal oxides and non-metallic oxides that melts at high temperatures. According to the source and purpose of production, slag can be divided into the following types:

1. Blast furnace slag: The slag generated during the smelting process of iron ore, mainly composed of SiO2, CaO, etc.

2. Electric furnace slag: The slag generated by the electric furnace during the steel smelting process, mainly composed of FeO, Fe2O3, etc.

3. Coking furnace slag: The slag generated during the coal coking process, mainly composed of SiO2, Al2O3, etc.

4. Power plant slag: The slag generated during the coal-fired power generation process, mainly composed of SiO2, Al2O3, etc.

2、 Comprehensive utilization technology of slag

1. Cement slag mixture: Mix slag and cement in a certain proportion to make a cement slag mixture, which is used in the field of building materials.

2. Slag brick making: Mix slag with lime, gypsum and other raw materials in a certain proportion to make slag brick, which is used in the field of building materials.

3. Furnace slag pottery: Mix furnace slag with clay, quartz and other raw materials in a certain proportion to make furnace slag pottery, which is used in fields such as ceramics.

4. Slag making sand: The slag is crushed, screened, and processed to produce slag making sand, which is used in fields such as building materials.

5. Production of alumina from slag: The slag is processed by high-temperature melting, cooling, etc. to produce alumina from slag, which is used in fields such as aluminum smelting.

3、 Advantages of slag comprehensive utilization technology

1. Reduce environmental pollution: Comprehensive utilization of slag can reduce the stacking of slag, thereby reducing environmental pollution.

2. Resource conservation: Comprehensive utilization of slag can convert waste into resources, thereby saving resources.

3. Reduce production costs: Comprehensive utilization of slag can reduce the cost of waste treatment, thereby reducing production costs.

4. Improving economic benefits: The comprehensive utilization of slag can convert waste into useful products, thereby improving economic benefits.

4、 Application prospects of slag comprehensive utilization technology

With the continuous improvement of environmental awareness, the application prospects of slag comprehensive utilization technology are very broad. At present, the comprehensive utilization technology of slag has been widely applied in fields such as building materials, ceramics, and aluminum smelting. In the future, slag comprehensive utilization technology can also be widely applied in fields such as cement, concrete, and road construction.

In short, the comprehensive utilization technology of power plant slag is a very important technology, which can reduce environmental pollution, save resources, reduce production costs, and improve economic benefits. In the future, the application prospects of slag comprehensive utilization technology are very broad, and we should strengthen research and application to promote the development of slag comprehensive utilization technology.

Comprehensive utilization technology of slag in power plants