For the tantalum-niobium ore beneficiation, the raw ore is generally roughed separation in the roughing plant first, and the rough concentrate is sent to cleaning. At present, the main roughing method of tantalum niobium ore is gravity separation. Due to the low grade of tantalum niobite and the relatively high density of useful minerals, it is most suitable to use gravity separation with relatively low-cost method for roughing separation. However, this method has a poor separation effect and a low recovery rate for super fine-grained tantalum-niobium, the flotation method is mainly used for super fine-grained tantalum niobium ore. At present, the gravity separation equipment used in tantalum niobium ore roughing includes jig machine, spiral concentrator, shaking table, centrifugal concentrator and chute, etc.
In addition to tantalum-niobium mineral, tantalum-niobium rough concentrate obtained by gravity separation method often contains useful minerals such as cassiterite, zirconium, xenotime, monazite, ilmenite and other gangue minerals. According to the different properties of minerals, gravity separation, magnetic separation, electric separation, flotation and other methods can be used to separate the final concentrate of various useful minerals.
Different types of ore, tantalum niobium ore processing methods are different, can be roughly divided into three types.
① In the ore only tantalum and niobium minerals is high density and the inlaying granularity is coarse, other useful minerals and gangue mineral density are small. This kind of ore usually obtains the rough tantalum niobium concentrate or the qualified tantalum niobium concentrate directly by gravity separation. The gravity separation tailings are re-ground then use gravity or gravity and magnetic for scavenging can obtain some qualified tantalum niobium concentrate.
② In addition to tantalum niobium minerals, there are one or several useful minerals or gangue minerals in the ore with high density. This kind of ore mainly uses gravity separation or gravity separation combined with magnetic separation process to obtain rough concentrate, discards a large number of waste ore, and then enriches tantalum and niobium according to the density, specific susceptibility, dielectric property, floatability and Hydrometallurgical characteristics of each mineral in the rough concentrate.
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