四川某高镁低品位磷矿浮选试验研究  

Experimental Study on Flotation of a High Magnesium and Low Grade Phosphate Rock in Sichuan

作　　者：李双龙 王进明[1,2,3] 何林圳 吴然 董发勤 Li Shuanglong;Wang Jinming;He Linzhen;Wu Ran;Dong Faqin(School of Environment and Resource,Southwest University of Science and Technology,Mianyang,Sichuan 621010;Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education,Mianyang,Sichuan 621010;Sichuan Province Non-metallic Ore Powder Modification and High Value Utilization Technology Engineering Laboratory,Mianyang,Sichuan 621010)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]固体废物处理与资源化教育部重点实验室,四川绵阳621010 [3]四川省非金属矿粉体改性与高值化利用技术工程实验室,四川绵阳621010

出　　处：《非金属矿》2024年第4期60-64,共5页Non-Metallic Mines

基　　金：矿物加工科学与技术国家重点实验室平台基金项目(BGRIMM-KJSKL-2022-21)。

摘　　要：针对四川某高镁低品位磷矿,采用反浮选试验进行提磷降镁研究。该矿MgO品位高达9.10%,P_(2)O_(5)品位仅为18.30%,主要含磷矿物为氟磷灰石、胶磷矿,脉石矿物主要为白云石和石英,矿物间嵌布粒度细。结果表明,经过条件试验选择硫酸作为磷矿物抑制剂,硫酸粗选用量为22 kg/t,磨矿细度-0.074 mm质量分数占82.00%,捕收剂为自制羧酸类捕收剂L+H混合药剂,通过开路浮选试验确定“1粗2扫3精”浮选流程,经闭路浮选试验可使磷精矿中MgO品位降至1.07%,P_(2)O_(5)品位达到30.17%,P_(2)O_(5)回收率为78.67%,最终实现该高镁质低品位磷矿的资源化利用。Reverse flotation test was used to extract phosphorus and reduce magnesium from a high magnesium and low grade phosphate rock in Sichuan Province.The MgO grade of the mine was 9.10%,and the P_(2)O_(5) grade was only 18.30%.The main phosphate minerals were fluorapatite,collophanite,and gangue minerals were mainly dolomite and quartz.The mineral distribution granularity was fine.The results showed that sulfuric acid was selected as phosphate inhibitor through conditional test,and the amount of sulfuric acid was 22 kg/t in rough flotation.The content of-0.074 mm in grinding fineness was 82.00%,and the collector was a mixture of carboxylic acid collector L+H which was made in the laboratory.The flotation process of"one stage of roughing,two stages of scavenging and three stages of cheaning"was determined by open-circuit flotation test.The closedcircuit flotation test can reduce the grade of MgO to 1.07%,and increase the grade of P_(2)O_(5) to 30.17%and the recovery rate of P_(2)O_(5) to 78.67%.Finally,the resource utilization of the phosphate ore with high magnesium and low grade is realized.

关 键 词：磷矿 脱镁 反浮选 氟磷灰石 白云石 

分 类 号：TD97[矿业工程—选矿]