|
| TABLE 6 | ||||||||||||
| FIRE CLAY SOLD OR USED BY PRODUCERS IN THE UNITED STATES, BY USE1 | ||||||||||||
| (Thousand metric tons and thousand dollars) | ||||||||||||
| 2006 | 2007 | |||||||||||
| Quantity | Value | Quantity | Value | |||||||||
| Pr | 848 | 19,000 | 565 | 23,800 | ||||||||
| U | ||||||||||||
| Heavy clay products and lightweight aggregates2 | 609 | NA | 325 | NA | ||||||||
| Refractories: | ||||||||||||
| Firebrick, block, shapes | 3 | NA | -- | NA | ||||||||
| Grogs and calcines | 140 | NA | W | NA | ||||||||
| Other refractories3 | 46 | NA | W | NA | ||||||||
| Miscellaneous4 | 50 | NA | 240 | NA | ||||||||
| Total | 848 | 19,000 | 565 | 23,800 | ||||||||
| NA Not available. W Withheld to avoid disclosing company proprietary data; included in "Miscellaneous." | ||||||||||||
| -- Zero. | ||||||||||||
| 1Data are rounded to no more than three significant digits; may not add to totals shown. | ||||||||||||
| 2Includes common brick, concrete block, portland cement, and structural concrete. | ||||||||||||
| 3Includes kiln furniture, mortar and cement, and miscellaneous refractories. | ||||||||||||
| 4Includes floor tile, wall tile, and other unknown uses. | ||||||||||||
Source: United States Geological Survey Mineral Resources Program