2003年以来,随着世界及中国经济的增长,全球有色金属供求关系发生逆转,国内外多数有色金属的价格均有较大幅度的上扬。不过,随着2005年世界及中国经济增长的放缓,市场对于有色金属的需求兴趣也逐渐下降,更为重要的是,过高的价格将直接损害需求,并导致替代品的使用,而另一方面, Since 2003, with the growth of the world and China’s economy, the supply and demand of non-ferrous metals in the world has reversed. The prices of most non-ferrous metals both at home and abroad have risen substantially. However, with the economic slowdown in the world and China in 2005, interest in non-ferrous metals is also on the decline. More importantly, excessive prices will directly undermine demand and lead to the use of alternatives. on the one hand,