超声波强化酸浸高磷铁矿石除磷试验研究

Experimental Study on Acid Leaching Intensified by Ultrasonic Wave to Remove Phosphorus from High-phosphorus Iron Ore

针对某焙烧-磁选后的高磷铁精矿(铁品位54.92%,磷含量0.83%),采用超声波强化硫酸浸出其中的磷。试验结果表明:随着超声时间的延长,除磷率逐渐降低,当超声时间为60min时,矿石的铁品位有一定波动,但比原来都有一定程度的提高,可达到58%以上,而铁回收率会随着超声时间的延长呈下降趋势,但都在92%以上;随着矿浆浓度的增加,浸出后矿石中的磷含量也逐渐增加,当矿浆浓度低于6%时,超声波除磷效果显著,固体中磷含量都低于0.24%;铁品位呈下降的趋势,但相对铁精矿都有一定程度的提高,而铁回收率也呈波动增加趋势,从最低的91.89%上升至95.50%。

Sulfuric acidwas used to leach the phosphorus in the high-phosphorus iron ore concentrate after magnetic roasting and separation（iron grade 54.92%,phosphorus content 0.83%）,and the ultrasonic wave was utilized to intensify the effects.The results showed that： with the increase of leaching time,the dephosphorization rate decreased gradually,and 60 min was the best time.The iron grade fluctuated to some extent while the recovery dropped consistently,which was over 92% as a whole.With the increase of pulp density,the remaining phosphorus went up as well.Under the condition of 6% pulp density,the results of dephosphorization by ultrasonic wave were significant,and the remaining phosphorus was under 0.24%,while the recovery of iron rose steadily,from minimum 91.89% to maximum 95.50%.