Promechnologie, Ltd – a process engineering   company offers a wide range of separators: sensor-based separator modules Module of lump separation of mineral feedstock and technogenic wastes (MLS). Let us observe its functioning of the equipment in the example of the model for
ferroalloy slag processing (MLS/T-1).

MLS/T-1 is designed for sorting metal-containing slag in order to recover separate metal-containing  lumps, irrespective of their physical properties (specific weight, magnetic properties, etc.).


Pic. 2. MLS

The Module is a plant installed into a container of 6.0 x 3.0 x 2.7 m  (in length, width, height), pic.2.

The plant includes: 1 – receiving bin; 2 – conveyer feeder; 3 – vibrotable; 4 – transport conveyer; 5 – facility for preparation of conveyer and feedstock parameters; 6 – registration facility; 7 – separation facility; 8 – air preparation system; 9 – automated systems of control over  the process; 10 – separation control system; 11-discharge chute; aspiration system.

Technical characteristics:

# Parameter  Standard
1 Material under processing Metal-containing metallurgic slag
2* Feedstock Fraction, mm 6 – 10** 10 – 20 20 – 40 40 – 80
3* Throughput capacity, tonne/hour (with bulking density on the coveyer ~ 1,4 tonne/m3) 5 12 28 42
4 Preset capacity, Kw 20 25 30 35

* the figures are set by the Client in Performance Specification for Arranging and Production of MLS

** processing of the material of this fraction is expedient at a high cost of a useful product

The principle of performance (Pic. 2)

The feedstock is fed into the receiving bin (1). There it is accumulated and onto the whole width of the conveyer belt of the feeder(2), which feeds the feedstock onto the vibrotable (3). The vibrotable forms a monolayer of it the feedstock and feeds it onto the conveyer belt (4).


Feeding from the feeder


 Forming a monolayer


Sorting facility

Процесс сепарации



 Disposition of system units


Aggregates inside the Module

While the feedstock is moving on the conveyer belt, the parameters of separate lumps are being controlled, fixed and analyzed. Special software (9,10) processes the data and forms a directing signal for the separation facility (7).

The sorting facility beats off the sorted samples by air jets. Thus, two streams of feedstock are formed: “useful” and “waste”.

Useful component is metal and metal-containing lumps, which have a changed trajectory as a result of being beaten off by the air jets. Waste is the mineral component of the feedstock. The important feature in the quality separation of feedstock is the discharge gate valve (11).

Integration into production cycle

The Module is easily integrated into existing production line. Please see the variants below.

Variant 1


Module on a foundation location, the byproduct and target concentrate are shipped by carts

Variant 2


High Module location, the byproduct and target concentrate are shipped by chutes

Variant 3


Stockyard Module location, the byproduct and target concentrate are shipped by conveyers.


The core advantage is a customized approach to the beneficiation process; our plant operates with different options such as physical property changings   and deals with every particular lump in the media.  By the way the sorting quality depends neither on the dust level nor on contamination one in the media. All the mentioned above data leads to the optimally possible quality which is considered ultimately the best one, the dry beneficiation methods are able to achieve:

Benefits of the extra advantages:

The technology has features that are immediately attractive. Let us consider them in the example of the facility MLS/T-1.

  • The Module is applied  in the fields of primary and finishing beneficiation;
  • High productivity: from 5 to 80 ton per hour (depends on fraction sizes  and/or input media density);
  • Wide range  of processing fraction: from +6 to -100 mm;
  • Target concentrate is an extracted only metal-based concentrate regardless of the input media physical properties (specific weight,
    magnetic properties, etc.).
  • High sensitivity to metal components (for a single inclusion – from -2 mm, also fine-dispersed inclusions, joints, coked formations, etc.).
  • Low energy consumption:  0.5 kW per one ton of input media, that is significantly lower than the one consumed by traditional methods.
  • The Module is easily integrated into existing production cycle. It is completely automated. It could be integrated into a factory’s
    automation system.


  • The Module is designed to process a certain type of input media. Any media change requires software correction.