绿色矿冶

At present, the utilization rate of nonferrous metallurgical slag in China is far from the ideal level. Long-term open-air accumulation of waste slag not only wastes land resources and pollutes the environment, but also causes the waste of valuable resources. Therefore, it is urgent to make high-value and harmless use of nonferrous slag. This paper introduced the classification and physicochemical properties of the four kinds of typical nonferrous slag: red mud, ferronickel slag, copper slag and lead-zinc slag systematically, and then introduced the resource utilization of nonferrous metallurgical slag from two aspects of valuable metals extraction and building materials preparation, analyzing the the characteristics of various valuable metal extraction technologies such as mineral processing, hydrometallurgy, pyrometallurgy and the combined technology of hydrometallurgy and pyrometallurgy, as well as the application of nonferrous metallurgical slag in the filed of building materials such as the preparation of cement, concrete, brick, roadbed, glass ceramics and mine filling and the field of environmental protection such as waste water, waste gas treatment and soil remediation, and finally put forward some suggestions to improve the comprehensive utilization rate of nonferrous slag.