flotation machine

What is flotation machine?

A flotation machine is an important piece of equipment that utilizes the differences in surface chemical properties of materials to separate valuable minerals from ores. Flotation is widely used in mining and mineral processing, primarily by having air bubbles adhere to specific minerals, causing them to float to the surface for collection, while leaving unwanted materials in the slurry.

Flotation machines are key equipment for efficiently extracting minerals from complex ores. Many models of flotation machines are available, and different equipment can be selected according to different types of ores and processing requirements. CHUNLEI flotation machines can significantly improve mineral recovery rates and reduce waste in mining operations.

What Is flotation machine Used For?

Flotation machine as a kind of mining flotation machine has the characteristics of large suction capacity and long life of wearing parts.Flotation machine is widely used in the flotation operation of nonferrous metals, black metals and nonmetals with obvious effect.

For example, A copper ore beneficiation plant in the beneficiation process only used the re-election method, after sorting the concentrate grade is low. By going to Chunlei Machinery for consultation and through the beneficiation test, the process was finally determined as heavy – flotation process. The flotation machine was used in the flotation, and the design of the forward tilting tank reduces the dead angle in the operation process, which makes the foam movement speed up and the sorting efficiency increase. After sorting, the concentrate taste was 10% higher than expected, and the subsequent economic benefits of the plant were greatly improved.

Applicable materials:It can be widely used in the separation of nonferrous metals, ferrous metals, and nonmetallic minerals, and is suitable for roughing and sweeping operations in large and medium-sized flotation plants.

Flotation Machine Customer Site

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Technical Parameters of Flotation Machine

Model	Effective volume (m3)	Capacity (m3/min)	Impeller diameter(mm)	Impeller diameter (r/min)	Stirring motor power(kW)	Scraper motor power (kW)	Single slot weight (kg)
SF-0.37	0.37	0.2~0.4	300	352~442	1.5	0.55	468
SF-0.7	0.7	0.3~1.0	350	336~384	3	1.1	629
SF-1.2	1.2	0.6~1.6	450	312	5.5	1.1	1373
SF-2	2	1.5 ~3	550	280	11	1.5	1879
SF-2.8	2.8	1.5~3.5	550	280	11	1.5	1902
SF-4	4	2.0 ~4	650	235	15	1.5	2582
SF-6	6	3~6	760	191	30	2.2	3540
SF-8	8	4.0 ~8	760	191	30	2.2	4129
SF-16	16	5.0 ~16	850	169~193	45	1.5	7415
SF-20	20	10 ~12	850	169~193	45	1.5	9828

Working Principle of Flotation Machine

When the impeller rotates, the slurry in the upper and lower impeller chambers is thrown around by the centrifugal force generated by the action of the upper and lower blades, forming a negative pressure zone in the upper and lower impeller chambers. At the same time, the slurry in the upper part of the cover plate is sucked into the upper impeller cavity through the circulating holes on the cover plate, forming the slurry upper circulation. When the lower impeller throws out the slurry in all directions, the slurry in its lower part replenishes to the center, thus forming the lower circulation of the slurry. And the air through the suction pipe, the center cylinder is sucked into the upper impeller cavity, and was sucked into the slurry mixing, the formation of a large number of small bubbles, through the cover plate flow stabilization, uniformly dispersed in the tank, the formation of mineralized air bubbles. Mineralized bubbles float up to the foam layer, scraped out by the scraper that is the foam product.

The structure of flotation machine is mainly composed of tank body, main parts with impeller, motor, scraper and transmission device, etc. Its volume is more than 10m3.

Advantageous features of Flotation Machine

• Impeller with backward tilting double-sided blades can realize double circulation of slurry in the tank.
• Large gap between impeller and cover plate, large suction volume.
• Low impeller circumferential speed, long service life of wearing parts.
• Forward tilting tank body, small dead angle, fast foam movement.
• Large suction volume, low energy consumption.
• Long service life of wearing parts.
• Favorable to the flotation of coarse-grained minerals.
• Mechanical agitation, self-absorption of gas, self-absorption of slurry.

Flotation Machine price

As for the price, we can’t show you the exact price because we deal with customers from all over the world and there are many factors affecting the price. If you want to know the price of Flotation Machine, you can leave a message to us on this page, we have professional sales staff and engineers to explain to you.

As one of the old brand mining machinery manufacturers in Henan, Chunlei Machinery strictly controls every Flotation Machine for sale with more reliable quality. Chunlei has its own R&D team and production site, and sells directly, enjoying factory super low price. What are you waiting for? Contact us immediately!

Flotation Machine FAQ

Q: What if the froth layer in the flotation machine is thin or there is no frothing?

A: First, check if the reagent dosage is insufficient (especially the frother), and adjust the reagent ratio accordingly. Second, check the aeration system; check if the aeration pipe is blocked or if the impeller cover plate is severely worn, resulting in insufficient air intake.

Q: What causes surface turbulence in the flotation tank?

A: This is usually caused by uneven installation of the impeller and cover plate, with one side having a larger gap than the other. The solution is to adjust the gap between the impeller and cover plate to be uniform, and at the same time check for any local damage to the cover plate.

Q: How often should the impeller and stator be replaced?

A: The impeller and stator are the core components most prone to wear. It is generally recommended to check and replace them every 6 months to 1 year. The specific replacement time depends on the abrasiveness of the ore. Wear will affect the flotation effect.

Q: How to deal with insufficient aeration in the flotation machine?

A: Check if the aeration pipe is blocked, if the valve at the pipe opening is fully open, and if the impeller speed is sufficient. If a loose belt causes a decrease in rotational speed, it will also affect the aeration rate. The belt needs to be tightened or the clearance adjusted.

Q: What causes bearing overheating or excessive noise?

A: Common causes include insufficient or contaminated lubricating oil, or damage to the bearing itself. The machine should be stopped, the oil level checked, and lubricating oil added or replaced as needed. Damaged bearings need to be replaced.

Q: What should I do if the flotation machine motor current suddenly increases?

A: This is usually caused by excessive sand accumulation in the tank, leading to increased load. The machine should be stopped immediately, and the sand in the tank flushed with high-pressure water before restarting. Prolonged sand accumulation will burn out the motor.

Q: What should I do if the flotation concentrate grade is low and the tailings run high?

A: Check if the reagent formulation is appropriate (collector-frother ratio), and observe the color and thickness of the froth. Also check if the slurry level control is proper; the froth layer should maintain a certain thickness (200-300mm) to avoid scraping out too much slurry.

Q: What needs to be checked before starting the flotation machine?

A: Check that all bolts are tight; manually rotate the impeller to ensure there is no jamming, preventing sediment buildup and increased motor starting load; check that the lubrication system is functioning properly.

Q: What concentration of slurry can the flotation machine handle?

A: Mechanically agitated flotation machines are typically suitable for slurry concentrations between 10% and 25%, with a solid density generally not exceeding 1.35 t/m³. Excessively high concentrations will affect aeration and flotation efficiency.

Q: What are the key points for daily maintenance of the flotation machine?

A: ① Clean the tank and pipes every 3 months to prevent sediment blockage; ② Lubricate the pump bearings every 3 months; ③ Regularly check the seals to prevent slurry and air leaks; ④ Maintain a stock of spare parts to minimize downtime.