湖北某低品质磷石膏浮选增白试验研究  

Study on the Flotation Purification and Whitening Test of a Low-grade Phosphogypsum in Hubei Province

作　　者：时春昱 杨思原 周俊伟 任浏祎[1,2] 倪高国 刘诚 包申旭 SHI Chunyu;YANG Siyuan;ZHOU Junwei;REN Liuyi;NI Gaoguo;LIU Cheng;BAO Shenxu(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;Key Laboratory of Green Utilization of Key Non-metallic Mineral Resources,Ministry of Education,Wuhan 430070,China;Hubei Xingfa Chemicals Group Co.,Ltd.,Yichang 443000,China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]关键非金属矿产资源绿色利用教育部重点实验室,湖北武汉430070 [3]湖北兴发化工集团股份有限公司,湖北宜昌443000

出　　处：《金属矿山》2024年第3期117-124,共8页Metal Mine

基　　金：湖北省科技重大专项(编号:2022ACA004-5);荆门市重大科技攻关揭榜挂帅项目(编号:20231h0228);武汉理工大学襄阳示范区研究生创新实践专项(编号:XYDZ-2022B03)。

摘　　要：磷石膏是湿法制磷酸工艺产生的固废,针对磷石膏品质差、白度低、难以资源化利用的问题,以湖北某磷石膏为例,运用XRD、SEM、显微镜等手段,系统地研究了其化学组成、矿物组成、微观形貌、嵌布粒度等工艺矿物学性质,并进行了提纯除杂试验。结果表明,试验用磷石膏中的主要矿物为二水硫酸钙,主要脉石矿物为石英,同时存在少量碳粒、有机质、水溶性磷氟。在煤油用量800 g/t、松醇油用量10 g/t条件下脱碳,1231用量100 g/t、MIBC用量300 g/t条件下脱硅,通过双反浮选—再磨再选流程处理,获得的磷石膏精矿纯度为97.28%、白度为58.15%,指标良好,品质满足国标一级品质量标准。该试验的成功为大宗、高附加值利用磷石膏固废指明了方向。Phosphogypsum is a solid waste generated by the wet process phosphoric acid process.Aiming at the problems of poor quality,low whiteness,and hardly utilization of phosphogypsum,systematic process mineralogy research by multiple a-nalysis methods including XRD,SEM and micro morphology for a phosphogypsum in Hubei were conducted.Based on which,improving purification removing impurities experiments was conducted.The results indicated that the main mineral composition of the tested phosphogypsum is calcium sulfate dihydrate with main gangue mineral of quartz,meanwhile the small amount of carbon particles,organic matter and water-soluble phosphorus and fluorine is also existed.With the usage of 800 g/t of kero-sene and 10 g/t of 2#oil for carbon removal,100 g/t of 1231 and 300 g/t of MIBC for silicates removal,a full process of"double reverse flotation,regrinding and reselection"could be used for obtaining good indicators of phosphogypsum concentrate with 97.28%purity and 58.15%whiteness.The indexes is better and purity and impurity content of phosphogypsum concen-trate all meet the first class product in Chinese national standard.The success of the experiment points out the direction for large-scale and high value-added utilization of phosphogypsum solid waste.

关 键 词：磷石膏 工艺矿物学 浮选 磨矿 白度 

分 类 号：TD923[矿业工程—选矿] TD97