氧化铝主力合约日内涨幅达8.00%，现报3375元/吨

Core Insights - The main contract for alumina has seen an intraday increase of 8.00%, currently priced at 3375 yuan per ton [1] Group 1 - The significant rise in alumina prices indicates strong market demand and potential investment opportunities in the sector [1] - The current price level of 3375 yuan per ton reflects a notable shift in market dynamics, which could impact related industries [1] - The 8.00% increase in the main contract suggests volatility in the alumina market, warranting close monitoring for investors [1]