Sepro-tech DNS Equipment

We introduce ourselves as an ISO 9001: 2015 certified company. We have been in the market since 2007 and serving to steel, power & mining sector under the register trade mark of “Sepro-tech engineers®.

We are proud to contribute to the environment friendly and low cost technology, as our technology is dry separation process. It is noteworthy that the patent for Dry Separation Technology & the Design is registered

With a substantial experience of manufacturing Iron Ore Beneficiation plants and supplied beneficiation plants from 10 TPH to 120 TPH to number of Iron Ore mines & Sponge Iron plant for up - gradation of low grade Iron Ore for under our belt, we are now confidently diversifying into other areas.

Now we have developed the same dry, eco friendly and low cost technology for beneficiation of Manganese Ore, Chromium Ore, Slag & metal separation from non-ferrous alloys such as Silico manganese Ferro-manganese, Ferro-chrome, Stainless steel metal recovery and for Baryte concentration etc.

The Sepro-tech DNS is basically Air based Density Separator which may referred as “Air jig” the media used for floatation and stratification is simply the air. The Sepro-tech DNS is capable to operate in the Density range of minimum 0.1 Tons/ to maximum 8 Tons/cub. mtr & size range from, +3mm to - 25mm.

Sepro-tech DNS is Dry Separation Technology which does not require water or liquid for separation. Also the separation cost is very low.

Operation of Sepro-tech DNS (Dry Technology)

Sepro-tech DNS is basically a Density Separator Equipment which uses atmosphere Air as a media for separation. It’s completely Dry Separation Technology.

The ROM after crushing and screening into required size directly fed to Sepro-tech DNS. This equipment segregates the material into two different densities as per the setting.

Sepro-tech DNS operates on “Relative Density” of the material i.e. two materials have difference in densities are separated with the help of this equipment.

The basic principle of the density separator involves flowing of dry granular material over an inclined vibrating Stratification Deck. Positive air pressure generated in the special chamber is forced up through the Stratification Deck and through the bed of material. This air flow holds material in stratified floatation. The particular movement of the Stratification Deck generates the Air pulsation. The lighter material in upper strata blows with every air pulses and discharged through Low Density outlet, whiles the heavier material in the lower strata travel uphill along the inclined vibrating Stratification Deck and is discharged from High Density outlet.

Three parameters are controlled according to the Relative Density, Mineralogy Libration of minerals & feed size.

  • Air Volume
  • Deck Inclination
  • Vibration Frequency

All the three parameters are controlled with the help of PLC based control panel for greater accuracy and to achieve sensitive performance.

The Sepro-tech DNS is modular system having a single module of throughput 10 TPH to 12.5 TPH. To achieve higher capacity, numbers of module are added together. (I.e. to achieve a capacity of 40 TPH have to install such four units of equipment).

Sepro-tech DNS operates in the size range of 3mm to 25 mm, & +25 mm to -50 mm. However it is recommended to feed a narrow band of size per equipment for example 3 to 6, 6 to 12, 12 to 25 mm, 25 mm to 35 mm & 35 to 50 mm etc. which will improve the efficiency of equipment, if there is very narrow density difference between two fractions to be separated. The equipment is wonderfully robust in design. Capable to work in dusty, corrosive, abrasive & open environment, remarkably efficient & exceptionally easy.

Features of Sepro-tech DNS (Dry Technology)

1100% Indigenous product with high efficiency of separation.
2Proven technology for dusty, corrosive and abrasive environment.
3Easy to operate and low maintenance system.
4Sepro-tech DNS is a modular equipment and can have multiple installations to achieve higher capacities.
5Available from 100 TPD to 1000 TPD throughput capacity.
6Operates within density range minimum 0.1 Tons/cub. mtr. To maximum 8 Tons/cub. mtr.
7Input size range in between +3 mm to -25 mm & +25 mm to -50 mm.
8No compressed air required.
9The system is skid mounted. No civil foundations are required.
10Easy to retrofit, Easy to dismantle, transport and install.
11The Process is completely dry and does not require any water or liquid, hence nonpolluting, environment friendly technology.
12Advance Electronics Control System along with Specially developed software program is incorporated into the Technology to increase the efficiency & Sensitivity of the equipment along trouble free operation


Automation for the Sepro-tech DNS Equipment.

Three parameters are controlled according to the Relative Density, Mineral to be processed, feed size and feed rate.

  • Air Volume
  • Deck Inclination
  • Vibration Frequency

All the three parameters are controlled with the help of PLC based control panel for greater accuracy and to achieve sensitive performance.


Air Volume

To control the Air Volume Sepro-tech DNS is equipped with Variable Inlet Vane Damper (VIV) & VFD in PID mode. A Variable Inlet Vane Damper is equipped with Quarter turn Electrical Actuator. A VIV Damper operates in 0 degree to 30 degree & 30 degree to 60 degree. Which modifies the Fan curve & also provide pre-spin in the direction of Fan rotation hence it will help to reduce the resistance to the Air resulting in a new modified Fan performance curve.
A VFD in PID Mode compares a signal from PLC & Air Velocity sensors resulting in the modulation of Fan speed which gives a constant Air volume & build comparatively constant positive Air pressure in the chamber. The user can increase or decrease the air volume in percentage of total volume through Touch Screen HMI.
A software program is developed for synchronizing between VIV Dampers, a VFD for impellers to achieve a sensitivity performance.

Deck Inclination

Stratification Deck of Sepro-tech DNS equipment equipment will be inclined or declined as per entered value by user through G.U.I. the position is indicated on display mm.

Vibration Frequency of Stratification Deck

The frequency of Vibration Deck for Stratification is directly proportional to the RPM of drive. This RPM is controlled with the help of V.F.D. User can increase or decrease the RPM through G.U.I. the display indicates current RPM of the drive.