A process for operating an oxidizable combustion gas cleaning unit in a metallurgical plant, including the steps of: (a) passing an oxidizable combustion gas from a metallurgical reactor, in particular a blast furnace gas from a blast furnace, in a packed bed scrubber arrangement through a packed bed in countercurrent with a washing water or in a spray scrubber arrangement to remove cyanide compounds, in particular hydrogen cyanide, and to increase the removal of chloride compounds, in particular hydrogen chloride, from the combustion gas by solubilizing the cyanide and chloride compounds in the washing water, (b) collecting the washing water containing solubilized cyanide and chloride compounds at a bottom end of the packed bed or spray scrubber arrangement, and (c) collecting a cleaned oxidizable combustion gas at a top of the packed bed or spray scrubber arrangement, wherein a base is added to the washing water before step (a).

A process for operating an oxidizable combustion gas cleaning unit in a metallurgical plant, including the steps of: (a) passing an oxidizable combustion gas from a metallurgical reactor, in particular a blast furnace gas from a blast furnace, in a packed bed scrubber arrangement through a packed bed in countercurrent with a washing water or in a spray scrubber arrangement to remove cyanide compounds, in particular hydrogen cyanide, and to increase the removal of chloride compounds, in particular hydrogen chloride, from the combustion gas by solubilizing the cyanide and chloride compounds in the washing water, (b) collecting the washing water containing solubilized cyanide and chloride compounds at a bottom end of the packed bed or spray scrubber arrangement, and (c) collecting a cleaned oxidizable combustion gas at a top of the packed bed or spray scrubber arrangement, wherein a base is added to the washing water before step (a).

The present disclosure discloses a sintering system. The sintering system includes: a rotary sintering furnace having an exhaust opening configured to discharge exhaust gas; and an exhaust gas treatment system connected to the exhaust opening and configured to treat the exhaust gas discharged from the rotary sintering furnace. The exhaust gas treatment system includes multi-stage treatment devices connected in series. At least one stage of the multi-stage treatment devices is a dust separation device. The dust separation device is configured to separate dust from the exhaust gas. At least one stage of the multi-stage treatment devices is a spray tower. The spray tower is disposed downstream of the dust separation device and configured to wash the exhaust gas that has been treated by the dust separation device.

The present disclosure discloses a sintering system. The sintering system includes: a rotary sintering furnace having an exhaust opening configured to discharge exhaust gas; and an exhaust gas treatment system connected to the exhaust opening and configured to treat the exhaust gas discharged from the rotary sintering furnace. The exhaust gas treatment system includes multi-stage treatment devices connected in series. At least one stage of the multi-stage treatment devices is a dust separation device. The dust separation device is configured to separate dust from the exhaust gas. At least one stage of the multi-stage treatment devices is a spray tower. The spray tower is disposed downstream of the dust separation device and configured to wash the exhaust gas that has been treated by the dust separation device.