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: Except for thermal power plants and large-scale heating boilers, there are many types of general enterprises and heating industrial boilers, and the coal consumption is large and scattered, accounting 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.
Lump coal screening system
At present, many infrastructure mines or small and medium-sized coal mines in China have not established coal preparation plants, and lump coal can not be separated, so it can only be sold together with open-pit coal, so the calorific value is low, and the sales price naturally cannot go up, which greatly reduces the benefits.
Furthermore, coal quality is the key slogan, so how can we do a good job of coal quality? Most coal mines still use a lot of labor, and arrange workers to pick up lump coal on moving belt conveyors or scrapers.
This has three main disadvantages. First, the safety of employees cannot be guaranteed, and it is common to touch hands and feet frequently, and what is more serious is the fracture of hands and feet; Secondly, the more manpower is invested, the greater the cost.
Thirdly, because the belt conveyor or scraper conveyor is running, it can only pick up a small part of lump coal, which is only a drop in the bucket for the overall benefit.
In view of this, we have been exploring and designing new equipment from the source, that is, installing a coal preparation system at the first underground loader to screen lump coal of various sizes according to needs, that is, lump coal screening system, in order to improve lump coal rate and improve enterprise benefits.
References:
Baidu encyclopedia-lump coal