唯物辩证法认为,自然界的一切资源都可以综合利用。因此,综合利用是发展工业的一个重要方向,是社会主义国家的一项重要的经济政策,是多快好省地建设社会主义的一条重要途径。实践证明,一个工厂除了生产主要产品外,还可以同时得到若干副产品。自然界中独生的矿物是很少的,绝大多数矿物都是彼此伴生的。石墨矿石当中除石墨外还有黄铁矿、磁黄铁矿、斑铜矿等金属 Materialist dialectics believe that all resources in nature can be comprehensively utilized. Therefore, comprehensive utilization is an important direction for the development of industry, an important economic policy for the socialist countries, and an important way for building socialism in a more rapid and economical manner. Practice has proved that a factory in addition to producing the main products, but also get a number of by-products. The only minerals in nature are rare, the vast majority of minerals are associated with each other. In addition to graphite graphite, there are pyrite, pyrrhotite, bornite and other metals