Experiment on the New Process of Multicomponent Utilization of Ludwigite Ore in Liaoning
There are many kinds of valuable metals in a low-grade ludwigite ore in Liaoning,includ-ing boron,iron,magnesium and so on.However,the existing production process only focuses on the separa-tion of boron and iron,and there are problems such as low recovery rate of valuable components such as bo-ron and iron,and no recovery of magnesium.In order to further improve the comprehensive utilization rate of the ludwigite ore and realize the high efficient separation and recovery of all components,the beneficiation process test is carried out on the basis of the study of ore properties.The test results show that the new pro-cess of stage crushing pre-concentration tailings discarding-grinding low intensity magnetic separation-bo-ron-magnesium separation on low intensity magnetic tailings is adopted for the raw ore.The new process si-multaneously extracts boron and iron minerals,and finally obtains a qualified boron-iron mixed concen-trate.The iron grade is 47.83%,the iron recovery rate can reach 92.25%,the B2O3 grade is 6.48%,and the B2O3 recovery rate is 60.86%.The separation effect of boron and magnesium in low intensity magnetic tail-ings is good.The content of B2O3 in boron concentrate is 15.19%,and the recovery rate of raw ore is 28.65%.The serpentine concentrate containing magnesium mineral reaches the first grade standard,and the yield can reach 12.38%.The comprehensive recovery rate of boron can reach 89.51%,which realizes the separa-tion and comprehensive and efficient recovery of boron,iron and magnesium resources.
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