coal quality的意思|示意

Coal quality is the set of physical and chemical characteristics of coal. It directly affects the efficiency and cost of using coal in various industrial applications. Coal quality is determined by a combination of the following properties:

1. Moisture content: Moisture content affects the ease of handling, storage, and burning of coal. Low-moisture coal is easier to transport and has a higher calorific value than higher-moisture coal.

2. Volatile matter content: Volatile matter content is an indicator of the combustibility of coal. Higher volatile matter content means higher calorific value and easier combustion.

3. Ash content: Ash content affects the ease of burning and transport of coal. Low-ash coal produces less combustion dust when burned and is easier to transport than higher-ash coal.

4. Sulphur content: Sulphur content affects the environmental impacts when burning coal. Low-sulphur coal produces less sulfur dioxide emissions when burned.

5. Hardness: Hardness affects the pulverising efficiency of coal. Harder coal requires more energy to break down, resulting in higher costs for grinding.

Coal quality can vary greatly between different sources of coal. Knowing the coal quality of a given source is important for optimising coal usage and ensuring an efficient and cost-effective operation.