Chain Conveyors: HHC

Low-wear and high-output conveyor capacities

Chain Conveyors

Apron Feeders / Chain Conveyors

HAZEMAG Apron Feeders HAF and Chain Conveyors HHC are used for feed hopper discharging in primary crushing plants as a loading or discharging conveyor e.g. in the cement and raw material industry. Conveying capacities of up to 2500 t / h with piece sizes of 2.7m3 are possible.


The Apron Feeder consists of heavy – duty conveyor chains, on which the apron pans are mounted. The chains run on support rollers that are mounted to the apron feeder frame. They are driven by chain sprockets and tensioned either mechanically or hydraulically.

Operation Method

The material on the apron feeder is transported by the conveying system. Thus there is no relative movement between the material and the aprons. This therefore leads to low – wear operation.

Tractor – type chains

The chains are heavy tractor – type chains, whose links are lifetime lubricated. Tensioning of the tractor chains is done via a tensioning shaft. Depending on the apron feeder size, it is either mechanically or hydraulically tensioned.

Apron Feeder Pans

An apron feeder pan is bolted to each link of the tractor chain. Every second plate is equipped with a carrier; this secures the material transport. The apron‘s specific contour assures that only very little material finds its way into the inside of the apron feeder.

Support Rollers | Return Rollers

The support rollers are screwed to the frame’s upper side and are lifetime lubricated. The tractor chain moves on these rollers. The support rollers are also lifetime lubricated. In the bunker feed – in area, support rollers are mounted shock – absorbed to reduce the shock loads on the apron feeder construction during tipping. The lifetime lubricated return rollers carry the outside edge of the apron feeder pans on the lower side of the frame.

Slide Rails

Slide rails are mounted under the apron feeder pans along the length; additional lubrication is not necessary. Furthermore in the input area, additional slide rails are attached in order to absorb shock loads.

Drive Unit

The apron feeder is driven either electro-mechanically or hydraulically. The conveying speed is infinitely adjustable; a back stop prevents the feeder from moving backwards.

Protection Guards

The protection guards consist of easy-to-remove protective covers that are mounted on the apron feeder frame as safety guards. The moving parts of the drive unit are protected from unauthorised intervention. Furthermore, the operation of the apron feeder is continuously monitored by an rotation detector.


  • For material extraction from feed hoppers and material conveyance
  • Extra heavy duty design and the very latest technology, backed by an extensive reference list – proven success around the world!
  • Exclusive “Tight Seal System” ensures that the pans remained sealed (no gap) during operation – each pan overlaps its neighboring pan, a result of engineering and precision machining
  • Variable-speed drive either by hydraulics or by planetary gear and frequency-controlled electric motor
  • Integrated spillage conveyor for removal of fine or sticky materials that may form on pans
Chain Conveyor
General Table – Chain Conveyor


General Examples / Guidelines
Limestone, Gypsum, Coal, Potash, Salt
Up to 4000 t/h
Feed Size
-70 inch
Normal Operating Angle
0 – 18 degrees
Conveying Length
Normally up to 75 feet


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