In-Furnace Dross Processing
IN-FURNACE DROSS PROCESSING
for liquid metal recovery in the furnace
The concept behind the IFDP is to compress the dross whilst still in the furnace, before removal when it can either get too cold and freezes or thermites exothermically, in both cases preventing effective recovery of the entrapped aluminum. The conditioning of the dross is enabled by a horizontal and vertical moving drain plate. In-Furnace Dross Processing is achieved in harmony with the skimming cycle adding only a 1 – 2 minutes to the cycle. The dross will be dragged onto the furnace sill and squeezed against the cold plate. The liquid Aluminum flows back into the furnace through openings in the skim plate. After the squeezing action is finished the remaining dross will be transferred to specially designed cooling dross pans in front of the furnace. The drain plate is used for a precise positioning of the dross cake. The procedure will be repeated until the furnace is completely de-drossed.
Benefits
- Liquid metal recovery in the melting furnace
- Decreased dross generation
- Retained alloy value
- Reduction of metal losses through thermiting by immediate cooling
- Reduced material handling
- Dross is prepared for further processing such as mechanical separation or conventional dross pressing
- Lower Green House Gas Generation
We offer the following types:
- Skimming machine with IFDP unit
- Upgrade of your existing RIA Skimming Machine
RIA IFDP gives a lot of advantages compared to traditional technologies. The most important is the reduction of metal losses at its occurrence. Up to 80% of the liquid metal contained in the dross flows back into the furnace and does not need to be processed or re-melted. Furthermore, the dross can be cooled immediately during skimming for later mechanical processing. This maximizes metal recoveries within the furnace. The process with a simple modification can also allow the dross to retain enough heat such that when used in conjunction with standard dross pans, the dross can be prepared for hot dross processing or conventionally pressed, further enhancing in house recoveries.
The AI and IFDP features in combination with the known advantages of the RIA skimming machine make this the best available technology for furnace skimming.