干扰床用于磷矿分选的初步探讨

Preliminary study of teetered bed separator for phosphate classification

本文通过对磷矿性质的研究,明确干扰床在磷矿分选中主要是根据粒度进行分选,从而实现P2O5的富集,P2O5品位从22.81%增加到24.44%。另外,矿石中各组分密度的不同对分选有一定的作用,在粒级为0.71~0.212mm中,P2O5品位从27.48%升高到29.10%。通过调整干扰床的床位和床层密度可控制分选效果,当床位为1.3m、床层密度为1.5g/cm3时,溢流中大于0.212mm含量为20.28%,底流中小于0.212mm的含量为6.24%,小于0.038mm的含量为1.59%,达到分选要求,且受给料量的影响较小。

Based on the study of process mineralogy and PSD of phosphate,it is clear that the classification of the teetered bed separator in phosphate beneficiation largely depends on the particle size which leads to the enrichment of P 2O 5 and the P 2O 5 grade increases from 22.81%in feed to 24.44%in underflow.What s more,the bed density has a certain impact on the classification and the P 2O 5 grade in 0.710~0.212 mm increases from 27.48%in feed to 29.10%in underflow.The classification effect will be adjusted according to the teetered bed density and level.In case of the level 1.3 m and teetered bed density 1.5 g/cm 3,the percentage>0.212 mm in overflow is 20.28%,the percentage<0.212 mm and<0.038 mm in underflow are respectively 6.24%and 1.59%,which is well for classification and hardly influenced by the throughput.