Lignite is a kind of low-grade coal, which is formed by peat diagenetic formation of humic coal, it’s the lowest degree of coalification, always present brown, dark brown, dim or asphalt luster color, no cohesive. Its physical and chemical properties are between peat and bituminous coal. High water content, high volatile, low density, containing humic acid, oxygen content up to 15 ~ 30%, easy to fragmentation, spontaneous combustion in the air. According to China's coal classification standards, they are divided into two categories: light transmittance PM 30 ~ 50% of the old lignite and PM less than or equal to 30% of the young lignite. Chinese and Indonesian lignite are mostly old lignite.

Jiutian engaged in coal, coal slurry drying industry for many years, through the physical and chemical properties of coal and lignite drying temperature, pressure, air speed and oxygen quantity such related parameter research, Jiutian establish lignite dryer test base in Inner Mongolia, after many experiments demonstrate technology research, successfully developed for lignite drying and lignite upgrade equipment.Our company lignite dryer can reduce the moisture of lignite 25-60% to 15-30%, after processing the calorific value of coal can reach 30-80%, direct as a substitute for thermal coal, bituminous coal and anthracite used in power plants.The technical equipment through has been running in China's Inner Mongolia, yunnan, xinjiang and Indonesia,it is security, stability, energy conservation, environmental protection,which has a huge and potential market, suitable for various coal mining enterprises.