It is estimated that by 2030, primary energy will continue to dominate energy sources, accounting for 84% of global energy use. Among them, the use of coal is rising.
The formation of coal is a long process, it is made of millions of years ago plant branches and rhizomes, long-term formation of black fossil fuels under high temperature and high pressure, known as "black **" coalification can be divided into three categories: lignite, bituminous coal and anthracite, which can be subdivided into 17 subcategories.
The higher the degree of coalification, the higher the carbon content in the coal, and the more demanding the time and conditions required for its formation.
Coal can be divided into thermal coal, coking coal and chemical coal according to the use demand. The main use demand is in thermal power plants, smelting steel, building materials, domestic coal, etc. Some coals, such as some bituminous coals (lean coal, gas coal, etc.), can be used as both thermal coal and coking coal.
China is currently the world's major coal producer, accounting for half of the world's total coal output, and is also the world's largest coal consumer and importer.
In 2022, China will import 29.3 billion tons, 45600 million tons. It can be seen that China's imported coal is far lower than its own production, and it is basically self-sufficient.
In terms of exports, since 2003, China has imposed strict quota restrictions on coal exports, and the export volume is very small, so the impact of the export part on coal is negligible.