Easily Master The Scheelite Flotation Process And Equipment

Characteristics of scheelite ore: scheelite has good floatability. There are many gangue minerals containing calcium in the scheelite ore, such as calcite, fluorite, apatite and so on, which complicate the flotation process.

This flowchart design is for a complete 500tpd scheelite ore flotation process plant. The details flow as follows:

 1. Already crushed ore less than 20mm is unloaded to a fine ore bin. An electromagnetic vibrating feeder is installed under the fine ore bin to evenly feed less than 20mm fine ore to the belt conveyor, then to the ball mill.

2. The ball mill uses 2.4m diameter by 4.5m length, which can achieve 500 tons capacity daily. The output of the ball mill goes to the spiral classifier for classification of coarse particles and fine particles. The underflow of the spiral classifier is coarse particles, which will be back to the ball mill for grinding again. The overflow of the spiral classifier is fine particles,which are qualified materials and go to the flotation process. The function of the spiral classifier here is to work with a ball mill together aimed to form a closed grinding circuit. The spiral classifier here uses double spirals by 1.5meters diameter, also can use single spiral by 2 meters diameter to match 2.4×4.5m ball mill.

3. The qualified materials from the spiral classifier go to a material mixing tank, there are 5 chemical mixing tanks and 5 chemical storage tanks next to it. After the materials are mixed with chemicals, then go to the flotation machine.

4. The flotation process is divided into three stages:

1). The function of the first stage of flotation is to remove the sulfide in the raw ore. 10 cells of flotation machines are used, respectively:   cells for roughing separation once, 6 cells for scavenging separation twice, and 3 cells for concentrating separation once, all of which use SF-4 model flotation machine.

2). The function of the second stage of flotation is to remove the easy floating impurities in the raw ore. 18 cells of flotation machine are used, respectively: 4 cells for roughing separation once, 12 cells for scavenging separation thrice, and 2 cells for concentrating separation once, all of which use SF-4 model flotation machine.

3). The function of the third stage of flotation is to remove the gangue containing calcium in scheelite. 18 cells of flotation machine are used, respectively: 4 cells for roughing separation once, 8 cells for scavenging separation twice and 6 cells for concentrating separation quintic. SF-2.8 flotation machine is used for roughing separation, scavenging separation and the first concentrating separation, and SF-0.7 flotation machine is used for the second to fifth concentrating separation.

After the three-stage flotation process, impurities such as sulfide and calcium-containing gangue were removed, making the final scheelite concentrate with high grade and good quality.

5. Finally, the scheelite concentrate after flotation is sent to thickener by slurry pump for adjusting the slurry density that is required by the disc vacuum filter, then the underflow of thickener is sent to disc vacuum filter by slurry pump for filtering and dewatering concentrate. The overflow of thickener is clear water which goes back to the return water pool.