Heavy Industries

Mining, Mineral and Cement Industries

Customer challenges

Mining and mineral plants are typically located in remote areas far from power generation plants. Power is distributed through long overhead lines, which may stretch up to hundreds of kilometers, weakening grids and lowering the fault levels. Power quality issues arise when a weak network is used to feed large winders, sag mills, or other heavy mining loads. When the heavy motors are started, arising flicker and voltage sags may disturb other loads in the plant. Voltage sag may also significantly reduce motor torque and thus affect productivity. Even if mining plants are operated on capacitive power plant, additional gensets are needed to keep the short-circuit level higher resulting in higher operational costs. Another major concern in mining plants are high harmonic distortions caused by DC, Cycloconverter and VSD drives. This kind of power quality problems will damage capital mining equipment and obstruct the continuity of mining processes.

Solutions

Applications

  • Mine winders
  • Sag mills, Ball mills and Rod mills
  • Conveyers
  • Crushers and grinders
  • Excavators
  • Large inductive loads such as fans, pumps and compressors
  • Shovels
  • Kiln drive

Customer benefits

The key benefits of improving power quality in Mining, Mineral and Cement industries include:

  • Increased motor torque and up to 30 % better payload
  • Improved production capacity of large mining loads without jams
  • Fewer gensets requirements and still more effective short-circuit capacity
  • Fuel savings and lower operating costs
  • Energy savings
  • Extended lifetime of the lining
  • Compliance with strict grid codes including IEEE 519, G5/4, IEC61000 3-2, 3-4 and other power quality standards and recommendations

Our success stories from heavy industry



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