氧化铝主力合约日内下跌4.00%，现报3052元/吨

Core Viewpoint - The main contract for alumina has decreased by 4.00%, currently priced at 3052 yuan per ton [1] Group 1 - The alumina market is experiencing a significant decline in prices, indicating potential volatility [1] - The current price of alumina is reported at 3052 yuan per ton, reflecting a notable drop [1]