| abstract |
The invention relates to the technical field of aluminum ash treatment, and discloses an efficient and clean secondary aluminum ash harmless treatment method. The secondary aluminum ash is added to a defluorination agent and a heavy metal removal agent, and then grinded and homogenized, followed by high temperature Roasting, the clinker obtained after roasting is high alumina inorganic material. The dust generated during the roasting process is collected by the dust removal device, and the filtered flue gas after the dust removal is subjected to wet absorption defluorination and ozone denitrification before being discharged up to the standard. After the collected dust is dissolved in water, it is evaporated and crystallized to obtain crystalline salt. The invention can cleanly, safely and efficiently process secondary aluminum ash, has the characteristics of simple process flow and low energy consumption, can realize high-value resource utilization of secondary aluminum ash, has strong market adaptability and wide application range. |