Case Histories

RESTORING THE CAPACITY OF MINING TAILING PONDS IN BRAZIL

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Project Details

  • Location: Brazil
  • Year: 2018

Project Description

A mid-size iron mine in the vicinities of Belo Horizonte in Minas Gerais State, Brazil is now using Dragflow hydraulic pumps to restore the capacity in their tailing ponds. The reason for this, is because only Dragflow pumps can take these sediments in such a high concentration that the material does not need dewatering prior to loading on trucks. 

The problem

The Minas Gerais state in Brazil has one of the highest concentration of iron mines per square kilometer in the world. These mines, upon receiving the ore from the pits and processing it through the plant, produce a large quantity of solid waste (known as mine tailings) that are deposited in sedimentation ponds inside the processing plant. Once these ponds are filled with sediment, it must be transported to a larger embankment area for final disposal. This was the case of the mine, and it was reaching critical levels. 

One of the main concerns here, was keeping the costs at a minimum for the mine, so there should be as little steps in the process as possible. 

Our solution

A Dragflow HY85 hydraulic driven dredging pump was coupled to the arm of an excavator and powered using the auxiliary hydraulic lines in order to make an autonomous unit with no need for additional hydraulic power unit. The pump, once in operation was able to move such high concentrations of the tailings, that there was no need to dewater the pump mixture output. The material was directly loaded on trucks using the discharge pipeline. The trucks then carried the material to their final disposal area in a larger embankment off-site, a few kilometers away. 

This solution was as cost effective as possible and has provided the opportunity to Dragflow to equip other 2 excavators with hydraulic pumps. 

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