摘要
目前我国大部分磷肥生产企业磷石膏固体废渣只能堆存,占用了大量土地,当堆场防渗处理不好时,投入大量的资金对堆存的磷石膏进行防渗治理,给企业发展带来了很大的经济负担。贵州磷化将磷石膏改性后进行井下充填采矿,可利用磷石膏2000~3000kt/a;通过在建材方面的开发与利用,全面投产后形成1200kt/a建筑石膏粉、1800kt/a高温石膏粉、300kt/a高强石膏粉配套上下游产品、2100kt/a石膏砂浆、石膏条板1×10^7m^2/a、3×10^7m^2/a无纸面石膏板、1.2×106m^2/a石膏配筋大板的生产能力,可消耗磷石膏3000~5000kt/a;与科研单位合作进行磷石膏制硫酸联产活性氧化钙中试项目,对实现贵州“以渣定产”的目标和磷石膏资源化、绿色化、产业化综合利用具有十分重要的意义。
At present, most phosphogypsum production enterprises in our country can only store solid waste residue of phosphogypsum, which occupies a large amount of land.When the seepage prevention treatment of the yard is not good, a large amount of funds are invested in the seepage control of the stored phosphogypsum, which brings a great economic burden to the development of enterprises.The phosphogypsum modified by Guizhou Linhua can be used for underground filling mining, and can consume 2 000-3 000 kt/a of phosphogypsum.Through the development and utilization of building materials, it can form 1 200 kt/a building gypsum powder, 1 800 kt/a high temperature gypsum powder, 300 kt/a high strength gypsum powder supporting upstream and downstream products and 2 100 kt/a gypsum mortar.The production capacity of gypsum strip board 1 ×10^7 m^2 /a, 3×10^7 m^2 /a paperless gypsum board and 1.2 ×10^6 m^2 /a gypsum reinforced board can consume 3 000-5 000 kt/a of phosphogypsum. The pilot project of co-production of activated calcium oxide from phosphogypsum to sulphuric acid in cooperation with scientific research institutes is of great significance to the realization of Guizhou s target of “slag-based production” and the comprehensive utilization of phosphogypsum resources, greening and industrialization.
作者
陈惠云
CHEN Huiyun(Guizhou Linhua Group Co.,Ltd.,Guiyang, Guizhou,550000,China)
出处
《硫酸工业》
CAS
2019年第7期5-6,10,共3页
Sulphuric Acid Industry
关键词
磷石膏
硫磷循环
井下充填
绿色建材
综合利用
phosphogypsum
sulphur-phosphorus cycle
underground filling
green building materials
comprehensive utilization
