【Process Introduction】：Wolframite consists of the quartz dyke type ores and veinlet tungsten ores. Dissemination size of ores is relatively coarse, so it is easy to separation. Xinhai wolframite mineral processing is a combined separating technology which mainly use gravity separation. And four stages are involved in this process, roughing, gravity separation, cleaning, and slime treatment.
【Application Scope】：This production line is especially applied to wolframite ore with an uneven distribution.
In the stage of roughing, Xinhai provides a method for the wolframite beneficiation plant. That is using vibrating screen and jig in the first stage of fine slime, then going directly to the process of cleaning.
In this stage, Xinhai would always apply the processing of multistage jig, multistage shaking table and regrind of middling. That is, after the stage of fine crushing, the qualified mineral will be classified by vibrating screen and then put into the multistage jig. After that the jig gravity rough concentrate is produced. The coarse jig tailings will be reground. The fine jig tailings will be classified by classifier and then put into multistage shaking table. After that the shaking table gravity rough concentrate is produced. The tailings will be discharged into tailings pond. The mineral left on the table will be reground and concentrated. The gravity sand concentrated by jig and shaking table will be concentrated in the process of cleaning.
In this stage, Xinhai would always apply the processing of flotation-gravity technology or flotation-gravity-magnetic technology, at the same time recycle the accompanying element. In this stage, by using the process of table flotation of coarse and fine particle fractions (combination of flotation and shaking table) and floatation, sulphide ores will be removed. Then the sulphide ore will put to sulfide flotation, and wolframite ore will be further concentrated through gravity sepatation. If the wolframite concentrate contains scheelite and cassiterite, the process of flotation-gravity technology or flotation-gravity-magnetic technology should be applied to separate out wolframite concentrate, scheelite concentrate and cassiterite concentrate.
Common practice of slime treatment in Xinhai is as following. At first, sulfur removal. Then according to the material property to select separation technology to recycle tungsten, such as gravity separation, floatation, magnetic separation, electric separation, etc or combination of several process. At the same time, comprehensive utilization of associated metal minerals.
The raw ore was tungsten ore with a WO3 grade of about 7% which was ≤200mm in size and had medium hardness. The slime and water contents were both smaller than 6%. The grinding fineness was -1mm because tungsten was not liberalized in the fraction of over 1mm.
The BF flotation machine is a self-aspirated mechanical agitation flotation unit with combined slurry suction/non-slurry suction.
SF flotation cell is a mechanical agitation type with slurry suction and air suction.
The submerged classifier is a classifier equipment whose overflow end spiral is completely submerged under the liquid surface.
Wet grid type ball mill is a traditional ball mill that relies on the discharge grid to discharge ore forcibly.
A shaker device that uses the asymmetric reciprocating motion of the bed surface to realize the separation of light and heavy minerals.
A gravity separation equipment that uses different sedimentation speeds of minerals in vertical alternating currents to realize the separation of light and heavy minerals.
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