Iran Mercantile Exchange witnessed the trading of more than 62,000 tons of commodities valued at over $28.1 million on Tuesday, including 21,300 tons of polymers, 520 tons of granulated sulfur, 3,000 tons of vacuum bottoms, 16,545 tons of bitumen and 300 tons of aluminum ingots. In addition, 15,400 tons of bitumen were traded for export purposes, the IME reported on its website.