摘要
针对某独居石精矿在综合回收过程中出现碱转矿浆变红、酸溶矿浆黏稠起泡沫导致产品变色、生产能力下降问题,采用扫描电子显微镜、红外光谱分析等手段对矿石污染物成分进行分析,并通过条件试验和半工业试验研究了煅烧法对独居石精矿污染物的去除效果。结果表明:碱转变色主要是由覆盖在独居石表面的含羧基、苯环或环烷烃的有机质造成;在煅烧温度400℃、煅烧时间40min条件下,碱转矿浆COD去除率大于94%,有机质去除效果较好,能解决生产处理能力下降30%的问题,还能降低电耗、能耗,解除生产中冒槽引发的职业健康等安全环保风险,同时保证铀、稀土回收率。该法完善了独居石加工流程,具有一定推广价值。
In view of the problems that alkali to solanite concentrate turned red and acid soluble slurry thickened into foam during comprehensive recovery,which led to product discoloration and decreased production capacity,scanning electron microscopy(SEM)and infrared spectrum analysis were used to analyze the composition of ore pollutants,and the removal effect of calcination method on monazite concentrate contaminants were studied through condition test and pilot plant tests.The results show that the alkali transformation color is mainly caused by the organic matter containing carboxyl group,benzene ring or cycloalkane covering the monazite surface.Under the conditions of calcination temperature of 400℃ and calcination time of 40 min,the COD removal rate of alkali to pulp is greater than 94%,and the organic matter removal effect is good,which can solve the problem of 30% reduction in production and processing capacity,reduce power consumption and energy consumption,remove occupational health and other safety and environmental risks caused by fluting in production,and ensure the recovery rate of uranium and rare earth.This method improves the processing process of monazite and has a certain popularization value.
作者
徐锦伯
蒋敏
刘浩
李金明
支梅峰
余文
XU Jinbo;JIANG Min;LIU Hao;LI Jinming;ZHI Meifeng;YU Wen(CNNC Resources Development Co.,Ltd.,Beijing 100013,China;Hunan CNNC Jinyuan New Materials Co.,Ltd.,Hengyang 421007,China;CNNC Huasheng Minerals Co.,Ltd.,Beijing 100013,China;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《湿法冶金》
CAS
北大核心
2024年第4期454-460,共7页
Hydrometallurgy of China
关键词
独居石
有机质
煅烧
半工业试验
分析
去除
污染
monazite
organic matter
calcination
pilot plant tests
analyzation
removal
contaminant
