It is mainly classified after rough grinding of raw ore. Coarse-grained products on the screen are recovered from coarse tantalum and niobium minerals and mica minerals rich in rare metals by high gradient magnetic separation-heavy liquid separation. After flotation of products under the screen through sulfide ore, fine tantalum and niobium minerals and feldspar minerals rich in rare metals are recovered successively by flotation method. The combined collector bisphosphonic acid, benzohydroxamic acid and soybean oleic acid which have better selectivity and collecting ability were added in the flotation process of tantalum and niobium. With this process, tantalum and niobium minerals with good indexes were obtained and other associated rare metals were recovered comprehensively. Comprehensive recovery process of associated tantalum and niobium ore.Tantalum and niobium are rare metals with high melting point, which are widely used in aerospace, military industry, semiconductor and other fields, and are indispensable metal materials for high-tech industry. China is rich in tantalum and niobium mineral resources, but there are few single deposits, most of which are associated deposits, and are often accompanied by rubidium, beryllium and other rare metals, which have great comprehensive utilization value. The beneficiation of tantalum and niobium minerals is usually recovered by means of gravity separation, magnetic separation and flotation according to the different properties of tantalum and niobium minerals.
For example, for the ore with high density tantalum and niobium minerals and coarse dissemination particle size, gravity separation is usually adopted as the main separation process. For the ores with high mineral density and coarse dissemination size of tantalum and niobium minerals, the separation process combining gravity separation with magnetic separation and electric separation is mostly adopted. For ores with high mineral density and fine dissemination size of tantalum and niobium minerals, flotation is the main separation process. However, for the associated tantalum and niobium minerals with uneven dissemination particle size, dispersed distribution, complex components and rich in other rare metals, the above method has the defects of low tantalum and niobium recovery rate, low tantalum and niobium concentrate grade, and other valuable metals can not be reasonably recycled.[Raw ore is screened and graded after rough grinding, and coarse and fine minerals are recovered by different processing technologies, which not only reduces the cost of subsequent regrinding and achieves the effect of early recovery and early utilization, but also reduces the cycle loss of minerals in the process, and is conducive to improving the total recovery rate of tantalum and niobium minerals. Coarse-grained tantalum-niobium minerals are recovered by magnetic separation-heavy liquid separation method. Heavy liquid separation method is suitable for separating a small amount of minerals with particle size greater than 0.1mm.
