Research progress on recycling of gypsum solid waste
XIN Xiangyu
CHEN Guangli
ZHANG Xiuzhi
FENG Shuxia
HUANG Yongbo
WANG Xujiang
DUAN Guangbin
Abstract：The chemical composition of different types of gypsum was reviewed.The regeneration methods and application fields of gypsum such as waste gypsum,phosphogypsum,desulfurized gypsum,fluorine gypsum and titanium gypsum were summarized.After the waste gypsum is hydrated into recycled gypsum,the recycling of gypsum resources can be realized.After the regenera-tion of phosphogypsum,it can be used as building gypsum,cement retarder and chemical fertilizer,etc.Desulfurized gypsum can be converted into high strength gypsum or building gypsum under certain conditions,and fluoropgypsum and titanium gypsum can only be used in primary processing.The development status and trend of gypsum solid waste industry were summarized.Although the comprehensive utilization rate of phosphogypsum and desulfurized gypsum has been increased year by year,there are few advanced gypsum products at the present stage.Because the output of titanium gypsum and fluoropgypsum is small,the comprehensive utilization rate needs to be further improved.Due to the different types of gypsum solid waste in different regions,it is suggested to choose the appropriate treatment and utilization method of solid waste according to the region,introduce relevant policies and learn from the advanced solid waste treatment technology abroad.It is believed that the problems of economy,environmental protection and utilization rate should be considered comprehensively in solid waste treatment,which will be the development trend of gypsum solid waste regeneration industry in the future.
Keywords：solid wastegypsumphosphogypsumdesulfurized gypsumrecycled gypsumregeneration
Publication Date：2023-02-25
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 10-18 )