Comprehensive utilization of slag resources in power plants

Comprehensive utilization of slag resources in power plants

With the development of industrialization, the amount of slag generated in power plants is increasing, and how to effectively utilize these slag resources has become an urgent problem to be solved. This article will introduce the types and characteristics of power plant slag, as well as how to comprehensively utilize slag resources.

1、 Types and characteristics of power plant slag

The slag of power plants is mainly divided into three types: coal powder slag, gas slag, and oil slag. Among them, pulverized coal slag is the most common one, accounting for the majority of the total slag. The main components of pulverized coal slag are silicate, iron oxide and Calcium oxide, which are characterized by high temperature, high hardness and high brittleness.

The main components of gas furnace slag and oil furnace slag are oxides and mixtures of oxides. Compared with pulverized coal furnace slag, their hardness and brittleness are lower, but their Granularity is smaller and easier to treat and use.

Method for Comprehensive Utilization of Slag Resources in Power Plants

1. Cement production

Pulverized coal slag and gas slag can be used to produce cement. The oxides in slag can react with lime in cement to produce cement clinker. Clinker undergoes processes such as sintering and grinding to ultimately become cement. This method not only effectively utilizes slag resources, but also reduces cement production costs.

2. Utilization of fly ash

The fly ash in coal powder slag can be used for concrete manufacturing. Fly ash has good fineness and activity, which can improve the strength and durability of concrete. In addition, fly ash can also be used to manufacture bricks, road materials, etc.

3. Production of slag cotton

Pulverized coal slag can be used to produce slag cotton. Slag cotton is a high-temperature insulation material with excellent insulation and high-temperature resistance. The production process of slag cotton requires high-temperature melting of the slag, and then the slag cotton is made through the fibrosis process.

4. Slag mixture

Slag mixtures can be used in fields such as road base and cement products. Mixing slag with other materials can reduce material costs while improving the mechanical properties and durability of the material.

5. Inorganic fiber products

Pulverized coal slag and gas slag can be used to produce inorganic fiber products, such as glass fiber, ceramic fiber, etc. These fiber products have excellent insulation performance, high temperature resistance, and corrosion resistance, and are widely used in fields such as construction, chemical engineering, and power.

3、 Summary

The comprehensive utilization of power plant slag resources is an important environmental protection work. By comprehensively utilizing slag, not only can the stacking and floor area of slag be reduced, but also environmental pollution and resource waste can be reduced. In the future, we should further explore the utilization value of slag resources, develop more comprehensive utilization technologies of slag resources, and contribute to sustainable development.

Comprehensive utilization of slag resources in power plants