March 38: refers to the size and specification of lump coal, in cm cm. Lump coal: generally refers to lump coal larger than 1.5cm, therefore, March 8th lump coal refers to lump coal with specifications of 3cm-8cm. In addition, the volatile matter of smokeless March 8 coal is basically below 10.
Extended data:
Lump coal use
1. Coal for power generation: about 1/3 of coal in China is used for power generation. At present, the average coal consumption for power generation is about 370 g/(kW h). Power plants use the calorific value of coal to convert thermal energy into electric energy.
2. Coal for steam locomotives: accounting for about 2% of power coal, and the average coal consumption index of steam locomotive boilers is about 100kg/ (ten thousand tons km).
3. Coal used for building materials: accounting for more than 10% of thermal coal, coal used for cement is the most, followed by glass and brick.
4) Coal for general industrial boilers: In addition to thermal power plants and large-scale heating boilers, there are many types of industrial boilers for general enterprises and heating, and the coal consumption accounts for about 30% of thermal coal.
5. Domestic coal: The amount of domestic coal is also relatively large, accounting for about 20% of fuel coal.
6. Metallurgical power coal: Metallurgical power coal is mainly anthracite for sintering and blast furnace injection, and its consumption is less than 65,438+0% of that of power coal.
Baidu Encyclopedia-Erwu Seed Coal
Baidu encyclopedia-sanba lump coal