| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Hearth roasting | Mining | A roasting process in which the ore or concentrate enters at the top of a multiple hearth roaster and drops from hearth to hearth in succession until it is discharged at the bottom. In the downward progress of the ore, the sulfide particles are roasted as they come in contact with the heated air. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
