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| TABLE 7 | |||||||||||||||||||||
| CLINKER PRODUCED AND FUEL CONSUMED BY THE CEMENT INDUSTRY IN THE UNITED STATES, BY PROCESS1 | |||||||||||||||||||||
| Fuel consumed2 | Waste fuel | ||||||||||||||||||||
| Clinker produced3 | Petroleum | Natural gas | Tires | Solid | |||||||||||||||||
| Quantity | Coal4 | coke | Oil5 | (thousand | (thousand | (thousand | Liquid | ||||||||||||||
| Active | (thousand | Percentage | (thousand | (thousand | (thousand | cubic | metric | metric | (thousand | ||||||||||||
| Kiln process | plants | metric tons) | of total | metric tons) | metric tons) | liters) | meters) | tons) | tons) | liters) | |||||||||||
| 2005: | |||||||||||||||||||||
| Wet | 23 | 11,807 | 13.5 | 1,480 | 586 | 29,300 | 22,800 | 85 | 9 | 479,000 | |||||||||||
| Dry | 79 | 70,809 | 81.0 | 7,340 | 1,740 | 58,000 | 310,000 | 315 | 110 | 894,000 | |||||||||||
| Both6 | 4 | 4,790 | 5.5 | 679 | 21 | --� | 62,000 | 5 | 10 | 93,300 | |||||||||||
| Total7 | 106 | 87,405 | 100.0 | 9,490 | 2,350 | 87,300 | 395,000 | 405 | 130 | 1,470,000 | |||||||||||
| 2006: | |||||||||||||||||||||
| Wet | 23 | 11,659 | 13.2 | 1,530 | 518 | 33,700 | 18,000 | 90 | 19 | 585,000 | |||||||||||
| Dry | 79 | 72,742 | 82.1 | 7,340 | 1,860 | 46,700 | 306,000 | 323 | 283 | 360,000 | |||||||||||
| Both | 3 | 4,154 | 4.7 | 661 | 13 | --� | 44,800 | 5 | -- | 42,600 | |||||||||||
| Total7 | 105 | 88,555 | 100.0 | 9,540 | 2,390 | 80,400 | 369,000 | 418 | 302 | 988,000 | |||||||||||
| -- Zero. | |||||||||||||||||||||
| 1Data exclude Puerto Rico. | |||||||||||||||||||||
| 2All fuel data have been rounded to three significant digits. | |||||||||||||||||||||
| 3Clinker data were all reported; although unrounded, data are thought to be accurate to no more than three significant digits. | |||||||||||||||||||||
| 4Essentially all reported to be bituminous. | |||||||||||||||||||||
| 5Distillate and residual fuel oil. Excludes used oils that were reported under liquid wastes. | |||||||||||||||||||||
| 6Fuel quantities may not represent normal operating conditions owing to the inclusion of a plant that underwent conversion from wet to dry technology | |||||||||||||||||||||
| the year. | |||||||||||||||||||||
| 7Data may not add to totals shown because of independent rounding. | |||||||||||||||||||||
Source: United States Geological Survey Mineral Resources Program