Forui Machinery Helps to Get Tungsten Concentrate of High-grade.

                                                                                 -------Tungsten beneficiation flow sheet & equipment
 

Most of tungsten is low grade and different flow sheets shall be designed for different kinds of ores. Here are the main beneficiation methods for black tungsten and white tungsten.
1. Flow sheet and plants for black tungsten beneficiation

a. pre-separation
Most of tungsten is lean ore with dilution rate of over 80%. And this makes it important to remove most of the waste stone before gravity separation. And the main pre-separation method in China is hand-selection. Heavy-medium method and photoelectricity separation has been used sometimes while the equipment involved is heavy-medium separator and photoelectricity separator.

b. gravity separation
The beneficiation method for black tungsten is gravity separation because of tungsten's big density. Gravity separation can separate it from material with density lower than 3.5-4. Quartz black tungsten is of large grain size and gravity separation can do a great job in this situation.
In gravity separation, jigger and shaking table is the common machines involved. For coarse or block tungsten, jigger is used commonly. Usually, the ore needs screening before jigging. Jigging is added in the milling phases to recover the block tungsten and to reduce pelitization of tungsten. The concentrate from jigger occupies over 50% in the tungsten beneficiation factories.
Shaking table is used for the fine ore separation with its great beneficiation efficiency. And strict classification is necessary before the shaking table, and usually water spiral classifier is used here.

c. mud tungsten separation
Floatation separation is adopted for the mud tungsten separation. After trial and error, flow sheet of branch crossflow floatation and different-speed selection and agitation is used to gain the great beneficiation efficiency with chemicals-saving.
As to magnetic separation, wet intensity magnetic separator is adopted to separate tungsten with great efficiency.


2. White tungsten separation flow sheet and equipment
The beneficiation of white tungsten is usually a combination of gravity separation and floatation separation or single floatation. Some white tungsten factories still do the pre-separation.

White tungsten has a great floatability, and it is usually together with calcic quartz like calcite, fluorite, apatite to make the floatation separation completed. Adding multi-metal salt to sodium silicate can help to improve the floatation alternativeness and gain great separation beneficiation.

Gongyi Forui Machinery Factory is a professional R & D manufacturer of jiggers, shaking table, magnetic separator, floatation separator. Forui has small machines for the sample test to design flow sheet and plant allocation.

 

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