当今非金属矿产品总的发展趋势是需求量不断增长,价格也十分可观。从产值来看,仅次于能源矿产而高于金属矿产居于第二位。许多非金属矿产通过对原矿石的适当加工,尤其经过深加工后,身价大为提高。例如:我国的硅藻土,原矿出口每吨仅 The general trend of today’s non-metallic mineral products is the continuous increase in demand, the price is also very impressive. From the perspective of output value, it is second only to energy minerals but higher than metal minerals. Many non-metallic minerals have been greatly increased in value through proper processing of raw ore, especially after deep processing. For example: China’s diatomite, raw ore export only per ton