Process and installation for treating oil-containing mill scale and similar materials.

摘要

To remove oil from oil-containing wet mill scale, mill-scale sludge and similar substances, these substances are treated in a continuous furnace (12) combined with an iron-ore sintering plant. Hot cooler exhaust air from the sintering cooler (5) flows in countercurrent to the mill scale through the continuous furnace (12). In this process, the scale is dried and some of the oil is burnt. The cooler exhaust air is then fed with the volatile oils into the ignition furnace (3) of the sintering machine (1) as combustion air and the residual oils are burnt therein. This prevents unburnt oils depositing in the electrostatic filter (8). Dry mill scale freed of oil can be fed to the mixed material (17).