Why is it necessary to strengthen the production management of aluminum slag treatment?
August 22, 2025
The aluminum slag produced during the casting process, although a waste material, contains recyclable metals and oxide residues. In order to generate reasonable benefits from the energy retention of recyclable metal utilization, it is necessary to strengthen management:
(1) The aluminum slag produced during the melting and casting production process should be treated in shifts. One reason is that a thin Y-Al,0 film will also form on the surface of both solid and liquid aluminum. " -A, 0, is prone to absorbing moisture from the air. When the pastry is treated while still hot, it can reduce the loss of metal during the aluminum wine processing and improve the quality of the treated metal. Cooled electrolytes can also absorb moisture. Adding moisture-absorbing slag to the electrolytic cell will also increase the consumption of electrolytes. Second, handle it in a timely manner to avoid the mixed storage of aluminum slag and minimize the amount of mixed metals as much as possible.
(2) The lead slag produced during the melting and casting production process should be classified and stacked according to the alloy grade. Both the aluminum slag before processing and the metal after processing should be classified and stacked by alloy grade to minimize the amount of mixed metals as much as possible.
(3) Smelting aluminum slag and casting aluminum slag should be collected separately. The aluminium slag produced during the smelting process contains flux components. The aluminum slag produced during the casting process, which does not contain flux components, can be recycled in the reactivation furnace through reactivation to increase the actual yield of the metal.
(4) Aluminum slag containing toxic elements such as rice should be stored separately. When producing aluminum alloys with high magnesium content, a small amount of beryllium is usually added to reduce the burn-off of magnesium. Beryllium is an active element that preferentially oxidizes and accumulates at the surface of molten metals. Therefore, aluminium slag contains a large amount of beryllium oxide (BeO). Beryllium oxide is a toxic substance and should be stored separately and properly kept. The treated waste residue should be sent to a dedicated storage yard to prevent pollution. During the operation, direct contact with the skin should be avoided.
(5) Properly handle the ash and slag. After the aluminum slag is processed, most of its metals can be recycled. It is reported that the extraction rate of aluminum by the foam flotation method is greater than 70%. However, the remaining ash still contains a considerable amount of metal and should not be discarded at will.
