Strategy and technical approach for total treatment of phosphogypsum in China
The technical progresses of phosphogypsum treatment in three directions in China are introduced:First,the resource utilization of phosphogypsum stock,which mainly involves the resource utilization of accumulated phosphogypsum,mainly used for building materials,industry,agriculture,and other aspects;Secondly,the incremental harmless treatment of phosphogypsum,which refers to the removal or solidification of harmful impurities in the newly added phosphogypsum through methods such as water washing,neutralization and calcination,effectively controlling the environmental pollution risk of phosphogypsum;The third is phosphogypsum reduction technology,which uses hydrochloric acid or nitric acid to produce phosphoric acid,reducing the displacement of phosphogypsum from the source.To address the issue of phosphogypsum treatment,it is necessary to adopt a comprehensive treatment strategy of resource utilization of stock,harmless incremental treatment and optimization after reduction,in a coordinated manner,with multiple approaches to address the root cause.
万方数据
维普
