近年来,随着世界经济的快速发展,铜资源消费快速增长。尤其在我国,进入21世纪后铜资源消费量平均每年增长16%。作为冶炼铜的主要原材料,铜精矿的进口量及价格也逐年递增。以南通口岸为例,2005年进口量为95.3万吨,均价为每吨7304元人民币,2006年进口91.2万吨,均 In recent years, with the rapid development of the world economy, the consumption of copper resources has rapidly increased. Especially in our country, after the 21st century, the consumption of copper resources has increased by an average of 16% annually. As the main raw material for smelting copper, copper concentrate imports and prices also increased year by year. Taking Nantong port as an example, the import volume in 2005 was 953,000 tons, with an average price of 7304 yuan per tonne and 912,000 tons in 2006, all of which