Horizontal Belt Filter

Horizontal Belt Filter

Filter Frames

They are manufactured in standard rolled and pressed metal sections. Materials are selected depending on the operating conditions and include:

  • Mild steel, painted or otherwise protected
  • A variety of stainless steels

The Transporter Belt

This belt supports the filter cloth and provides drainage channels and holes for filtrate removal. All our transporter belts have a carcass free center zone to ensure long life by preventing contact between the carcass and corrosive filtrates.

Belt Width:

  • 500 mm
  • 800 mm
  • 1200 mm
  • 1600 mm
  • 2000 mm
  • 2400 mm
  • 2800 mm
  • 3200 mm
  • 4200 mm
  • 4800 mm

Rubber Grades:

There are different grades of rubber available for various duties. Depending on the application we select between:

  • Natural Rubber
  • SBR (HT or LT)
  • EPDM
  • Chlor-Butyl
  • Neoprene

The grade of rubber, filter application and site conditions will normally determine the type of splice required. As a general guide:

  • < 70°C - cold bonded
  • > 70°C - hot bonded


Rubber curbs are bonded or vulcanized to the edges of transporter belt to prevent the inadvertent spillage of feed material cake wash water. They also serve as vacuum seal.

Vacuum Box

Our vacuum box design ensures that it is suited for both the process conditions as well as the mechanical stresses found in the most extreme applications. Vacuum boxes are available in the following materials:

  • A variety of stainless steels
  • Glass reinforced plastic
  • HDPE / PP

Wear Strip and Wear Belt

The concept of wear strips and wear belt for vacuum sealing has been adopted by all major belt filter manufacturers around the world. Wear strips are made from highly wear resistant, low friction material and are attached to the vacuum box shoulders to locate loose wear belts.

Transporter Belt Support

This can be affected in a variety of ways depending on the application of the filters.

  • Heavy duty drying filters typically utilize a system of air boxes which direct a cushion of air to the underside of the belt
  • Light duty washing filters typically utilize a system of wear belt support stations similar to that used for vacuum sealing
  • Another proven system is that of utilizing a support slide manufactured from stainless steel or HDPE with a film of water to provide frictionless belt movement.

Cake Washing Applications

High extraction efficiencies greater than 99.8 % can be achieved when a flooded level of solution is maintained in the wash zone, allowing plug flow displacement. Efficient separation of wash zones from the filter table, spreads in the vacuum box and a patented slope on the filter. By ensuring that no forward leakage occurs, the client is assured of maximum liquor concentration and recovery.

Co-Current Washing

Co-current washing in several stages gives excellent washing efficiency when filtrate dilution is not critical and two to three displacement washes are common.

  • Gold and silver recovers in cyanide processes
  • Recovery of metals in solution followed by precipitation
  • Washing of phosphate rock
  • Recovery of manganese
  • Cement copper
  • Tailings washing as final stage after CCD

Counter – Current Washing

This method is used when down-stream treatment of filtrates requires minimum dilution such as solvent extraction, evaporation or when limited washwater is available. Both cake filtration and vacuum box zones can be effectively and easily divided to give optimum washing.

  • Acid leached copper, cobalt and pyrites
  • Washing nitrates
  • Recovery of alumina from sintered mud
  • Soda ash
  • Recovery of brine
  • Hemi- and di-hydrate calcium sulphate from phosphoric acid
  • Uranium recovery after acid or carbonate leaching
  • Recovery of yellow cake
  • Cellulose pulp washing
  • Vanadium and Tungsten recovery
  • Sugar cane mud washing

Details about some of the mining equipments: