关键词:  , 磷石膏, 硫资源, 循环经济, 硫磺

Abstract: It′s analyzed the present status of utilization of phosphogypsum at home and abroad and pointed out that the comprehensive utilization of phosphogypsum has been less than 20% in China.A large number of phosphogypsum is dumped and stacked,which not only takes up a lot of land, but also impacts ecological environment.And in the case of scarcity of resources of sulfur,the resources utilization of phosphogypsum has become an inevitable choice in China.Main problems and solutions of the preparation of sulfuric acid and co-production of cement from phosphogypsum at present were summarized.Based on high decomposition temperature of phosphogypsum and low concentration of sulfur dioxide gas from decomposition of phosphogypsum in the course of the preparation of sulfuric acid and co-production of cement from phosphogypsum,a new technology was proposed,i.e.to reduce phosphogypsum with sulfur instead of coke.And the features and advantages of the new technology were also pointed out.

Key words: phosphogypsum, sulfur resources, recycling economy, sulfur