electricity coal and steam coal are pulverized coal.
Thermal coal is also called bituminous coal/pulverized coal.
The washed and mixed coal is the coal from the coal washing plant, which has washed away the earth and stones and is of poor quality.
Raw coal is extracted directly from Wells or pits without screening and processing, is a mixture of lump coal and pulverized coal.
The procedure is as follows: the raw coal can be separated into pulverized coal (steam coal, electric coal), washed coal and lump coal.
In a broad sense, all power generation, locomotive propulsion, boiler combustion for the purpose of generating power and the use of power coal, referred to as power coal.
The quality of coal used in thermal power plants is an important basis for boiler design and production process.
The characteristics of fuel coal include two aspects: one is coal characteristic, the other is ash characteristic.
Coal characteristics refer to coal moisture, ash, volatile matter, fixed carbon, element content (carbon, hydrogen, oxygen, nitrogen, sulfur), calorific value, ignition temperature, grindability, particle size, etc.
These indicators are directly related to combustion, processing (e.g. pulverized coal), transport and storage.
Ash characteristics refer to the chemical composition of ash, characteristics at high temperature, and specific resistance, etc.
These characteristics have a great impact on the degree of cleaning after combustion, corrosion of steel and the removal of coal ash.
Power with coal in terms of categories, mainly lignite, long flame coal, unbonded coal, poor coal;
Gas and coal and a small amount.
From the commercial coal, mainly washing mixed coal, washing coal, coal powder, coal and so on.
Inferior coal mainly refers to the boiler operation is unfavorable to the ash content (more than 40%) low calorific value (less than 15.
73 mj/kg), anthracite with low volatile matter (less than 10%), lignite with high moisture and low calorific value, and coal with high sulfur (more than 2%), etc.