含磷污水滤渣制备过磷酸钙的试验研究  

Experimental Study on the Preparation of Single Superphosphate from Phosphorus Containing Wastewater Filter Residue

作　　者：张芷紫 廖秋实 肖林波 田承涛 黄琴 孟洋 刘燕琴 王焜 刘珍珍 ZHANG Zhizi;LIAO Qiushi;XIAO Linbo;TIAN Chengtao;HUANG Qin;MENG Yang;LIU Yanqin;WANG Kun;LIU Zhenzhen(Hubei Sanning Chemical Co.,Ltd.,Zhijiang,Hubei 443206,China;Hubei Phosphoric Acid and Phosphate Engineering Technology Research Center,Yichang,Hubei 443000,China;Wuhan Institute of Technology,Wuhan,Hubei 430070,China)

机构地区：[1]湖北三宁化工股份有限公司,湖北枝江443206 [2]湖北省磷酸及磷酸盐工程技术研究中心,湖北宜昌443000 [3]武汉工程大学,湖北武汉430070

出　　处：《肥料与健康》2024年第3期46-50,共5页Fertilizer & Health

基　　金：湖北省重点研发计划项目(2023BCB079)。

摘　　要：为充分利用处理磷石膏渗滤液后产生的废渣(一次中和滤渣和二次中和滤渣),开展了以中和滤渣为原料生产过磷酸钙的试验,考察了一次中和滤渣、硫酸、二次中和滤渣、磷酸用量对过磷酸钙产品中有效磷、水溶性磷、游离酸、硫等含量的影响。结果表明:当一次中和滤渣、硫酸、二次中和滤渣的质量比为1∶2∶2.5,磷酸加入量为一次中和滤渣质量的20%时,得到的过磷酸钙产品能达到国家标准《过磷酸钙》(GB/T 20413—2017)中合格品Ⅱ的要求。以处理磷石膏渗滤液后产生的废渣为原料生产过磷酸钙,既解决了污水滤渣的后处理问题,又实现了资源的回收利用。In order to fully utilize the waste residue(primary neutralization filter residue and secondary neutralization filter residue)generated from the treatment of phosphogypsum leachate,experiments are conducted on the production of single superphosphate using neutralization filter residue as raw material.The effects of the dosage of primary neutralization filter residue,sulfuric acid,secondary neutralization filter residue,and phosphoric acid on the content of available phosphorus,water-soluble phosphorus,free acid,and sulfur in single superphosphate products are investigated.The results show that when the mass ratio of primary neutralization filter residue,sulfuric acid,and secondary neutralization filter residue is 1∶2∶2.5,and the amount of phosphoric acid added is 20% of the mass of primary neutralization filter residue,the obtained single superphosphate product can meet the requirements of qualified product Ⅱ in the national standard"Single Superphosphate"(GB/T 20413—2017).The production of single superphosphate using waste residue generated from the treatment of phosphogypsum leachate as raw material not only solves the problem of post-treatment of sewage filter residue,but also realizes the recycling and utilization of resources.

关 键 词：一次中和滤渣 二次中和滤渣 过磷酸钙 磷石膏 资源回收 

分 类 号：TQ442.11[化学工程—化学肥料工业] X786[环境科学与工程—环境工程]