Abstract:
Pyrite solid wastes is one kind of the mine solid wastes with typical resource and environmental characteristics, which is discharged during the processes of chemical acid making and sulfur refining and contains many useful and harmful components.In China, the mass of pyrite solid wastes is very large and most of them is difficult to comprehensive utilization due to low useful components.A large amount of pyrite solid wastes not only occupies land and becomes the source of secondary geological disasters such as slag debris flow, but also leads to the heavy metals and other harmful substances into the environment, which seriously threatens the safety of ecology and human settlement.In this paper, the current situation and characteristics of pyrite solid wastes in China are analyzed, in view of the condition of pyrite resource endowment, the development demands of sulphuric acid industry and the discharge of “three wastes” in sulphuric acid production.The environmental effects of pyrite utilization and pyrite solid waste storage in typical slag-producing areas in China are discussed as well.Furthermore, the domestic and foreign levels of comprehensive utilization of pyrite solid wastes are compared in terms of resource potential and technology.Finally, according to the requirements of resources and environment in China, three suggestions about the comprehensive utilization of pyrite solid wastes in China are proposed as follow:improving the guarantee degree of sulfur resources and exploring the resource potentialities of pyrite solid wastes; intensifying development of crucial technologies for utilizing pyrite solid wastes and application of proven technologies; constructing coordinating management systems of comprehensive utilization of pyrite solid wastes and environmental protection.