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Resources 2014, 3 167 Figure 6. Off gas emission control installation at the IsaSmelt furnace at Umicore e-waste recycling facility [60]. Reprinted with the permission from AMS, 2006. 3.2. Metals Recovery from E-Waste at Rönnskär Smelters The Rönnskär Smelters (Boliden Ltd., Skelleftehamn, Sweden) are used for the recovery of metals from e-waste. Figure 7 shows the flow sheet diagram of the process at Rönnskär Smelters. A variety of scrap from the non-ferrous and electronic industry is introduced into the process at different stages depending on the purity and requirement of the final product. For instance, high copper containing scrap is fed into the converting process directly, but low-grade e-waste is fed into the Kaldo furnace. The annual recycling of wastes (including e-waste) is more than 100,000 tons. The feed material of the Kaldo converter consists of blended lead concentrates and e-waste that are combusted with the supply of oxygen and oil. The main steps in the Rönnskär Smelters are drying, roasting, smelting, converting and refining, as schematically shown in Figure 7. Figure 7. Flow sheet diagram of the Rönnskär smelters [63]. Reprinted with permission from Association of Plastics Manufecturers in Europe (APME), 2000.PDF Image | Metal Extraction Processes for Electronic Waste
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