Moisture is included in the processes of mining, transportation, storage, and washing. The external moisture attached to the surface of coal particles and the large capillary pores, as well as the internal moisture adsorbed or condensed in the capillary pores inside the coal particles, can completely evaporate the internal moisture in the coal when the temperature exceeds 100 ° C
Excessive moisture in coal is not conducive to processing, transportation, thermal stability, and heat conduction, directly affecting the quality of coke, reducing coke production capacity, prolonging coking time, increasing energy consumption in the coking process, and reducing coke yield
The moisture content of coal is divided into two types: internal water (Minh) and external water (Mf) The presence of moisture is extremely detrimental to the utilization of coal. As a fuel, the moisture in coal becomes steam, which consumes heat during evaporation; In addition, the moisture content of clean coal also has a certain impact on coking. Generally, for every 2% increase in moisture content, the calorific value decreases by 100kcal/kg (kcal/kg); For every 1% increase in moisture in refined coal smelting, the coking time is extended by 5-10 minutes.