Extracție selectivă a mineralelor utile

Mineralele utile de zăcământ și materiile prime minerale sunt utilizate într-o gamă largă de aplicații ca de exemplu ca materie primă pentru construcții sau ca sursă de energie. Dar cum sunt exploatate? Ce metode permite roca pentru a fi exploatată în mod selectiv și rentabil?

Forarea și derocarea prin împușcare nu mai sunt metode actuale în lucrările de exploatare a mineralelor și de terasamente. Răspunsul WIRTGEN GROUP: minerit de suprafață - cu materialul extras fie încărcat direct în basculante de carieră sau depus în cordoane.

Minerit de suprafață: încărcare directă în basculanta de carieră

One of the most important features of the WIRTGEN Surface Miners is their ability to load the cut material directly onto trucks. WIRTGEN Surface Miners are designed for front loading or rear loading, depending on the model concerned.

Front loading

On the front-loading 2200 SM, the discharge belt is mounted at the front of the machine. It can be slewed to either side and the discharge height adjusted as required. Depending on the size of the truck, these machines load the trucks either from the rear or from the side. The operator of the Surface Miner has a clear view of the truck.

Rear loading

Other models, such as the 2500 SM and 4200 SM, are rear loaders, their discharge conveyor being mounted at the rear of the machine. The conveyor can be slewed about 90 degrees to either side and the discharge height adjusted as required. The operator of the Surface Miner can swivel his seat to the right or left to ensure that he has a clear view of the truck.

Gently loading trucks with small-sized material

In all cases, the fine grained material cut by the WIRTGEN Surface Miner ensures that the truck body is loaded uniformly, continuously and completely. These loading characteristics allow the truck size to be selected as required. Trucks with aluminium bodies and increased payload can also be used under certain circumstances, for example.

Your advantages:

  • No material re-handling
  • Direct loading onto trucks is usually the most economical method if the material is to be transported over distances of more than approx. 500 m.

Minerit de suprafață: depunerea materialului în cordoane

When working in windrowing mode, the cut material is deposited directly behind the machine without using the conveyor. This makes the cutting process independent of any loading processes (onto trucks). However, the material must subsequently be re-handled by a front loader.

In many cases, the higher productivity achieved by windrowing as compared with direct loading balances out the additional costs incurred for renewed handling of the material (e.g. by wheeled loaders).

Moreover, this method does not give rise to any belt wear and does not incur operating costs for the conveyor system.

Your advantages:

  • No time lost waiting for trucks
  • No belt wear / higher availability
  • Higher production output than when loading with conveyors
  • Larger lump sizes
  • Greater selectivity when working steep and inclined seams
  • Most economical method for transport distances of less than approx. 150 m when handled by wheeled loaders and approx. 500 m in scraper operation

Surface mining: Depositing the material laterally

Sidecasting the material means that a stockpile is produced by dumping the material from several cuts on a pile via the belt. Depending on the slewing angle of the conveyor belt, material from 3 to 5 adjacent cuts can be piled up. Depending on the height of the resultant pile, the material can easily be picked up again by a front loader.

Your advantages:

  • Material can be mixed as it is mined
  • Stockpiling in the mine
  • No time lost waiting for trucks
  • Independent operation

The innovative technology cuts expenses for machines and personnel and saves a considerable amount of time when compared to conventional methods. At the same time, it produces even, stable surfaces and embankments, and permits the selective mining of individual rock layers. And that’s not all: Surface mining is a low-dust, low-noise method that causes no damaging vibrations and therefore permits effective mining of useful minerals close to residential areas or roads.

Cutting costs, boosting product quality and efficiency

The mined and crushed material is so small that it can be processed profitably, requiring minimum subsequent treatment. Mining bauxite, phosphate, kimberlite or salt has become increasingly profitable and the surface miner can even mine hard limestone or granite with unconfined compressive strengths of up to 260 MPa without blasting.

WIRTGEN ROMANIA este membru al WIRTGEN GROUP, un grup de companii care operează la nivel mondial din sectorul de mașini de construcții și care cuprinde mărcile tradiționale de produse: WIRTGEN, VÖGELE, HAMM, KLEEMANN si BENNINGHOVEN. În calitate de lider tehnologic, oferim clienților noștri soluții de mașini mobile pentru construcția de drumuri și de reabilitare a drumurilor, instalații pentru minerit și pentru prelucrarea mineralelor sau materialelor reciclate, precum și pentru producția de asfalt.
Cifrele noastre cheie : În 2016, WIRTGEN GROUP a realizat o cifră de afaceri consolidată de 2,59 miliarde de euro. In prezent WIRTGEN GROUP are 8.000 de angajați.

© 2017 WIRTGEN ROMANIA