|
| TABLE 8 | ||||||||||||||||
| ELECTRIC ENERGY USED AT CEMENT PLANTS IN THE UNITED STATES, BY PROCESS1 | ||||||||||||||||
| Electric energy used2 | Finished | Average | ||||||||||||||
| Generated at plant | Purchased | Total3 | cement | consumption | ||||||||||||
| Quantity | Quantity | Quantity2 | produced4 | (kilowatthours | ||||||||||||
| Number | (million | Number | (million | (million | (thousand | per metric ton of | ||||||||||
| Plant process | of plants | kilowatthours) | of plants | kilowatthours) | kilowatthours) | Percentage | metric tons) | cement produced) | ||||||||
| 2005 | ||||||||||||||||
| Integrated plants: | ||||||||||||||||
| Wet | -- | -- | 23 | 1,770 | 1,770 | 13.2 | r | 13,075 | 135 | |||||||
| Dry | 5 | 486 | 79 | 10,400 | 10,900 | 81.3 | r | 78,423 | 139 | |||||||
| Both5 | -- | -- | 4 | 770 | 770 | 5.7 | 5,029 | 153 | ||||||||
| Total or average3 | 5 | 486 | 106 | 12,900 | r | 13,400 | r | 100.0 | 96,527 | 139 | ||||||
| Grinding plants6 | -- | -- | 7 | 214 | 214 | -- | 2,562 | 84 | ||||||||
| Exclusions7 | -- | -- | 2 | XX | XX | -- | 229 | XX | ||||||||
| 2006 | ||||||||||||||||
| Integrated plants: | ||||||||||||||||
| Wet | 1 | (8) | 23 | 1,770 | 1,770 | 13.1 | 12,741 | 139 | ||||||||
| Dry | 5 | 476 | 79 | 10,600 | 11,100 | 82.3 | 79,014 | 141 | ||||||||
| Both | -- | -- | 3 | 622 | 622 | 4.6 | 4,098 | 152 | ||||||||
| Total or average3 | 6 | 476 | 105 | 13,000 | 13,500 | 100.0 | 95,854 | 141 | ||||||||
| Grinding plants6 | -- | -- | 6 | 160 | 160 | -- | 1,962 | 81 | ||||||||
| Exclusions7 | -- | -- | 2 | XX | XX | -- | 351 | XX | ||||||||
| rRevised. XX Not applicable. -- Zero.� | ||||||||||||||||
| 1Data exclude Puerto Rico. | ||||||||||||||||
| 2Electricity data are rounded to no more than three significant digits because they contain estimates. | ||||||||||||||||
| 3Data may not add to totals shown because of independent rounding. | ||||||||||||||||
| 4Include portland and masonry cements. Data are all reported and have not been rounded. | ||||||||||||||||
| 5Electricity consumption may not represent normal operating conditions owing to the inclusion of one plant that underwent conversion from wet to dry kiln | ||||||||||||||||
| technology during the year. | ||||||||||||||||
| 6Excludes plants that reported production of only masonry cement. | ||||||||||||||||
| 7Plants that reported production only of masonry cement. | ||||||||||||||||
| 8Less than � unit. | ||||||||||||||||
Source: United States Geological Survey Mineral Resources Program