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 | 4,859 | 7.17% |
| 2021 | 4,534 | -6.90% |
| 2020 | 4,870 | -0.47% |
| 2019 | 4,893 | 197.64% |
| 2018 | 1,644 | 13.75% |
| 2017 | 1,445 | 22.64% |
| 2016 | 1,178 | -1.26% |
| 2015 | 1,193 | 6.19% |
| 2014 | 1,124 | -19.81% |
| 2013 | 1,401 | 5.06% |
| 2012 | 1,334 | -12.01% |
| 2011 | 1,516 |