基于粒度对混合稀土纯矿物浮选过程影响分析

Analysis of the Influence of Particles on the Flotation Process of Mixed Rare Earth Pure Minerals

以包头白云鄂博混合稀土纯矿物为研究对象,通过对不同粒度混合稀土纯矿物浮选及其动力学行为探索,研究了矿物粒度对浮选过程的影响。结果表明:混合稀土精矿的动力学与一级动力学模型的匹配度最高,同时不同粒径的颗粒对矿物浮选行为产生较大的影响。在混合稀土纯矿物分批刮泡粗选中,-40+10μm颗粒的浮选速率常数及REO的最大回收率均大于-10μm和+40μm颗粒;而对于混合稀土纯矿物一次粗选、三次精选浮选流程来说,随着精选次数的增加,可浮性优的颗粒(-40+10μm粒级)在浮选精矿中的富集程度逐渐增大,并且在第3次精选精矿中其比例远高于可浮性差的颗粒(+40μm粒级和-10μm粒级)。因此,对于白云鄂博稀土纯矿物浮选来说,-40+10μm颗粒可浮选性优于+40μm和-10μm颗粒。通过对白云鄂博稀土混合矿粒度在浮选过程的研究,为其浮选工艺提供了有力的理论依据。

Taking the Baiyunebo mixed rare earth pure minerals as the research object,the flotation kinetics and its dynamic behavior of mixed rare earth pure minerals with different granularity were explored,and the effect of mineral grain size on the flotation process was also studied. The results show that the first order dynamic model was most suitable to fit the kinetics of the mixed rare earth pure minerals,and the particles with different sizes have a great influence on the flotation process. The flotation rate constants of-40 ＋ 10 μm particles and the maximum recoveries of REO were larger than those of-10 μm and ＋ 40 μm particles in coarse selection of mixed rare earth pure minerals by batch selection. As for the flotation process of mixed rare earth pure minerals,with the increase of the selection times,the enrichment degree of the floating particles（-40 ＋ 10 μm particles） in the flotation concentrate is gradually increased,and the proportion of the particles in the concentrate is much higher than that of the particles with poor floatability（ ＋ 40 μm particles and-10 μm particles）. Therefore,for the flotation of rare earth pure minerals in Baiyunebo,the flotation performance of the with the size range in-40 ＋ 10 μm particles is better than that of ＋ 40 μm and-10 μm. By studying the particle size of the Baiyunebo rare earth mixed ore in the flotation process,it provides a strong theoretical basis for its flotation process.