Lignite is the lowest rank of coal, often referred to as brown coal, used almost exclusively as fuel for steam-electric power generation. It is brownish-black and has a high inherent moisture content, sometimes as high as 45 percent The heat content of lignite ranges from 9 to 17 million Btu per ton on a moist, mineral-matter-free basis. Production data include quantities extracted from surface and underground mines, and normally exclude wastes removed at mines or associated reparation plants.
| 日付 | 値 | 変更 , % |
|---|---|---|
| 2022 | 269 | -13.38% |
| 2021 | 311 | -3.94% |
| 2020 | 323 | -13.24% |
| 2019 | 373 | -17.16% |
| 2018 | 450 | -2.86% |
| 2017 | 463 | -11.76% |
| 2016 | 525 | 8.68% |
| 2015 | 483 | -27.12% |
| 2014 | 662 | -9.35% |
| 2013 | 731 | -3.59% |
| 2012 | 758 | -19.30% |
| 2011 | 939 |