Coal knowledge (understanding the nature and use of coal)

Coal is a common fossil fuel with a wide range of uses. It is the main energy source of fuel, chemical raw materials, building materials and electric power industry. This paper will introduce the properties and uses of coal, and provide some operating steps to help readers better understand and use coal.

First, the nature of coal.

1. Composition of coal

Coal is mainly composed of carbon, hydrogen, oxygen, nitrogen, sulfur and other elements, of which the carbon content is the highest, generally above 50%. Different kinds of coal have different compositions, which affect their combustion performance and use.

2. Classification of coal

According to the formation process and characteristics of coal, coal can be divided into lignite, bituminous coal, anthracite and lean coal. Among them, lignite has high water content and low calorific value, and is mostly used for power generation and heating; Bituminous coal and anthracite have high calorific value and are mostly used in metallurgy, chemical industry and other fields; Lean coal has low calorific value and is mostly used in brick factories, ceramic factories and other fields.

3. Physical properties of coal

Physical properties of coal include density, hardness and color. Different kinds of coal have different physical properties, which affects their processing and use.

Second, the use of coal.

1. Coal combustion

Coal is an important fuel, widely used in power generation, heating, industrial production and other fields. Coal will produce a lot of heat energy in the combustion process, which can be converted into electric energy, heat energy and other forms to provide energy for people's production and life.

2. Chemical utilization of coal

Coal can be converted into various chemical products through chemical reactions, such as synthetic ammonia, synthetic methanol, synthetic oil and so on. These products are widely used in chemical industry, medicine and agriculture.

3. Coal building materials

Coal can be used to produce cinder bricks, cinder stones and other building materials, and it has good thermal insulation, fire prevention and other properties, and is widely used in the construction field.

Third, the use of coal.

1. Coal combustion

Put coal into a furnace or boiler, light it, and control the combustion temperature and oxygen supply to generate heat energy.

2. Chemical utilization of coal

Coal is processed and converted into required chemical products through chemical reaction.

3. Coal building materials

Coal is processed into cinder bricks, cinder stones and other building materials used in the construction field.