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Howden Roots® Blowers has been manufacturing and developing the rotary positive displacement blowers that bear their name continuously since 1854.

​Today, they produce robust, heavyduty bi-lobe or tri-lobe designs that deliver reliable performance with innovative Whispair™ technology for low noise, low pulsation compression – perfect for mineral processing.

Howden equipment is used in many applications. In initial ore treatment fans are used for washing or percolation in ore leaching to increase airflows, and fans and blowers are used to provide air for flotation cells. Smelting of concentrated base metal ores (copper, lead, zinc) is a process in which fans and the turbo compressors provide air for the reactions. Centrifugal fans exhaust the gases from the converters and smelters.

Cleveland in conjunction with Howden are major suppliers of fans for alumina refineries and aluminium smelters.