Mine Cooling Systems are required as a result of deep excavations in more remote locations. For that reason, nowadays, installed refrigeration capacity is in high demand.
For more than a century, Howden has supplied ventilation equipment to every major mining company in the world, from frozen sites in the Arctic and the hottest nations in Africa to some of the deepest mines on the planet.
Learn about how Howden's knowledge is key to energy-saving and increased production on mining sites.
Howden has developed a cutting-edge mine cooling system that is safe and cost-effective.
It is a 15MWR Surface Refrigeration and Bulk Air Cooling System at Caraiba mine in Jaguarari, located 400 km from Salvador in Bahia, Brazil.
Howden has won a contract to supply a cooling system for the expansion of the Prominent Hill mine in South Australia for OZ Minerals.
Howden successfully delivered the first phase of an 8 MW surface bulk air cooling plant for the Roxgold Sanu Yaramoko gold mine in Burkina Faso.
Howden has been awarded a turnkey Mine Cooling system from the design stage to commissioning in Caraiba mine–Brazil. Total Mine Ventilation Solutions
Once a mine reaches a depth of 800m or 1000m, productivity and working conditions inside the mine become increasingly difficult due to the increase in temperature.
For miners to be able to work safely and productively, the ambient air has to be cooled to a wet-bulb temperature of approximately 28˚C.
This is when it's crucial to have an engineering study of the best possible refrigeration solutions tailored to each mining site.
At Howden, we play a vital role in creating Mine Cooling Systems to ensure the best solutions for the mine site.
Howden's experts, with unmatched experience and reference installations, are capable of delivering the most optimal design solution.
A wide and quality portfolio is available, from Surface Bulk Air Coolers to Hard Ice Plants, that ensures business continuity and productivity of the mine site.
It is installed on the surface to cool the downcast shaft air. It works well in shallow mines with shorter distances between the downcast shaft bottom and the mining zone.
Primary system components:
The water is chilled on the surface and sent to the underground works through a chilled water piping system and distributed to underground air coolers.
When the capacity of an existing chilled water reticulation system is maximized, underground refrigeration systems can be used to provide additional cooling.
It is a mobile underground refrigeration unit for localized cooling. Spot Coolers are small refrigeration machines with cooling duties between 200kWR and 1300kWR.
Ice is produced on the surface and conveyed down a shaft into an ice dam located underground. 23kg/s of ice will provide the same cooling as 100kg/s chilled water flow. (77% reduction in flow).
The Ventsim CONTROL's Cooling on Demand (CoD) functionality allows users to monitor temperatures at deeper levels and push back cooled air more efficiently.
The Cooling on Demand aligned with trends it was seeing in the industry towards deeper mines requiring cooled air to achieve higher standards of health and safety for workers.
These new controls ensure the cool air from the cooling plants at surface levels goes where it is required, saving operating and energy costs.
Howden installed a 30 kg/sec 10 MW(R) hard ice plant, using plate ice makers and ammonia refrigeration screw compressor sets, at Mponeng.
With increased depth comes increased ventilation and mine cooling needs, a fact Howden knows well from its experience of working with the deepest mines in South Africa.