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Pneumatic mechanical flotation machines

Pneumatic mechanical machines of “RIF” type are designed for ore dressing by froth floatation method. Due to origial design, Floatation machine “RIF” is produced for various floatation operations considering special features of mineral raw-material dressing.

Hydrodynamic conditions created by RIF Aeration Units due to optimal bottom and rising flows of pulp allow increasing the amount of finely dispersed air and reducing the power consumed by the aerator unit drive.

Design of the RIF flotation machines ensures:
• Effective floatation of particles of wide fineness range including the class of +0.2 mm and more.
• High index of content and recovery of useful components in concentrate, reduce of tailing loss. 
• High operation reliability.

The main design feature of the floatation machines is modular principle of construction, which allows their efficient implementation during reconstruction of floatation sections of existing enterprises with limitations for roof height and lifting equipment capacity. Due to such design, it is easy to transport the flotation machines both by railway and by truck.

 

 

 

 

The RIF machines consist of the following main sections (modules):(module I) — receiving section; (module II) — chamber section; (module III) — section of froth overflow channels; (module IV) — intermediate section; (module V) — discharge section; (module VI) — section of double chamber.

DESIGN SPECIAL FEATURES

• Quantity of modules II, III, IV is determined subject to machine arrangement variant. 
• In the machine direct flow line, it is recommended to install: for floatation machines with the chamber capacity from 0.2 up to 8.5 m3 — not more than 6-8 chambers; for floatation machines with the chamber capacity from 16 up to 40 m3 - not more than 4 chambers. Direct flow lines of the machine are connected with the use of intermediate section (module IV).
• Housing units of the floatation machines modules are produced in special ways (racks) of ship technology.
• Cover housing of the V-belt drives is produced from reinforced plastic which allows to reduce the noise level, increase the aesthetic perception of the item.
• Housing units of the floatation machines modules are produced in special ways (racks) of ship technology. 
• Chambers of the floatation machines are equipped with transversal froth overflow channels. 
• Internal surface of the floatation machines housing units is protected from chemical erosion with special polymeric rubber coating and the places exposed to abrasive wearing are protected with rubber metallic lining. 
• Hydrodynamic operation mode of the floatation machines is corrected depending on floatation operation.

 

 

 

 

 

 

 

ADVANTAGES

• High-grade new hydrodynamic conditions created by RIF Aeration Units of new design due to optimal bottom and rising flows of pulp allow to increase the amount of finely dispersed air and to reduce the power consumed by the aerator unit drive of new design. 
• Effective flotation of wide fineness range including of class +0.2 mm and more. 
• High index of content and recovery of useful components in concentrate, reduce of tailing loss. 
• Split shaft impeller block. 
• High operation reliability.

Upgrading of dressing mill at Uchalinsky mining and dressing complex, RUSSIA

Magnetite concentrate flotation finishing section at Inguletskiy Mining and Ore Dressing Combine, Krivoy Rog, UKRAINE

Upgrading of bulk floatation at Nickolayevsky dressing plant, KAZAKHSTAN

Upgrading of flotation section at Zangezursky MMK dressing plant,Kadzharan, ARMENIA
Name of the main parameter and size

RIF 0,2

RIF 0,5

RIF 1,5

RIF 3,5

RIF 6,5

RIF 8,5

RIF 16

RIF 25

RIF 45

1. Chamber capacity, m3

0,2 ± 0,02

0,5 ± 0,05

1,5 ± 0,15

3,5 ± 0,2

6,5 ± 0,4

8,5 ± 0,4

16 ± 1,25

25 ± 1,25

45 ± 2,0

2. Current capacity, m3 • min-1, up to

0,4

0,8

20,

4,5

10,0

10,0

16,0

20,0

40,0

3. Power of aerator drive electric motor per the chamber, kW,not more, at the density of ore, less than 3.0 t • m-3

1,5

5,5

11,0

15,0

22,0 (30,0)

22,0 (30,0)

37,0 (45,0)

37,0 (45,0)

45,0 (55,0)

4. Rated consumed power, kW • m-3, not more than

6,0

10,4

6,0

3,2

3,04 (4,6)

2,3 (2,9)

2,0 (2,5)

1,4 (1,6)

0,9 (1,2)

5. Volume of air supplied to aerator per chamber, m3 • min-1, up to

0,2

0,5

1,5

3,0

6,0

6,0

10,0

12,0

15,0

6. Rated air volume per chamber, m3 • min-1 • m-3, not more than

1,0

1,0

1,0

1,0

-

-

-

-

-

7. Rated air volume per chamber surface area, m3 • min-1 • m-2, not more than

-

-

-

-

1,2

1,2

1,3

1,3

1,2

8. Excessive air pressure at the air manifold inlet; kPa, within

7-10

7-10

15-25

15-25

20-35

30-40

35-45

35-45

45-55

9. Nominal voltage of electric motor power supply, V

380

380

380

380

380

380

380

380

380

10. Number of chambers in the direct flow cascade, not more than

8

8

8

6

6

6

4

4

3

Automatic system of pulp level and air flowrate stabilization ASSUP-RV

 

To maintain the pulp level in the floatation machines cascades, intermediate and discharge sections are equipped with automatic system of pulp level and air rate stabilization which:

• ensures high reliability due to two-channel control system; 
• allows monitoring visually the current and preset pulp level values as well as fast change of controller task and settings; 
• is fast acting and ensures smooth control of the pulp level; 
• allows control of the current value of pulp/air mixture density;  
• is long –life due to design of the pulp level sensor not inclined to incrustation unlike float sensors and using of highly reliable automatic controller; 
• allows to exclude pulp density impact by means of two piezometric sensors lowered to various chamber depths

.

Advantages:

• Implementation of programmed controllers with the operator's display panel, simple procedure of process regulation and control system. 
• Implementation of reliable pneumatic drives of plug valves and air gates. 
• Possibility of manual control of actuating devices. 
• Possibility of operation in both local control mode and as part of the dressing plant Automatic system of process control.

TANK PNEUMATIC MECHANICAL FLOATATION MACHINES:

Advantages:

• Increasing of froth removal rate.

• Regulation of chamber capacity in order to optimize pulp residence time in the chamber.

• Increasing of process parameters of floatation by creation of efficient hydrodynamic conditions provided by design of aeration unit and configuration of chamber bottom part

 

Special design features are the following:

In the chamber it is possible to install additional channels (radial ones) as well as a special device performing froth removal function and froth direction to peripheral channels. Radial channels and special devices are installed in order to increase froth removal perimeter or change froth surface area/ froth removal perimeter ratio.

In the middle of the chamber lower part, there is an aeration complex RIF consisting of stator, impeller and flow former.

The lower part of the chamber is protected from abrasive wearing with the rubber lining. The lining is fixed to the frame with special rubberized clamps.

Floatation machine is equipped with an automatic system to maintain pulp level within the defined limits and air flowrate supplied to the chamber.

Froth removal sensors are installed in order to control the froth product removal.

To maintain the pulp level in the chamber, bottom parabolic form valves with pneumatic drive are used.

The chamber design provides connection of the direct flow lines without an intermediate section.

You can see characteristics of the most frequently used floatation machines below.

In order to obtain necessary floatation capacity, tank machines are composed in direct flow cascades with the drop between cascades of not more than 500 mm.

.

RIF 30Ц

RIF 65Ц

RIF 85Ц

RIF 100Ц

RIF 130Ц

RIF 200Ц

1. Chamber capacity, m3

30 ± 1,5

65 ± 3,0

85 ± 4,0

100 ± 5,0

130 ± 6,0

200 ± 10,0

2. Current capacity, m3 • min-1, up to

45

60

80

100

130

200

3. Power of aerator drive electric motor per the chamber, kW, not more, at the density of ore less than 3.0 t • m-3

45

(55)

55

(75)

75

(110)

110

(132)

132

(160)

160

(200)

4. Volume of air supplied to aerator per chamber, m3 • min-1, up to

16,0

16,0

19,0

22,0

25,0

29,0

5.Tank
Diameter, mm
Height to the edge, mm

3500

3580

5000

3300

5500

3580

6000

4180

6000

4600

6780

5540

6. Excessive air pressure at the air manifold inlet; kPa, within

40-50

45-50

50-55

55-60

60-70

72-75

7.Nominal voltage of the electric motor power supply, V

380 (+29)

(-38)

380 (+29)

(-38)

380 (+29)

(-38)

380 (+29)

(-38)

380 (+29)

(-38)

380(+29)

(-38)

8. Number of chambers in the direct flow cascade, not more than

3

3

2

2

2

1

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