Centre Discharge (CD) Knelson batch concentrator

The Centre Discharge (CD) Knelson™ batch concentrator historically has been the industry workhorse and most widely used centrifugal equipment for precious metal recovery

CD Concentrator
  • Overview

The CD concentrator has now become the machine of choice for most alluvial mining operators where conditions are generally less severe than those present in hard rock mill environments. The CD series is also an economical alternative for applications where project economics may not support the purchase of a premium class XD unit.

The CD series provides a cost effective alternative to the XD series concentrator through the use of carbon steel construction, and it provides precisely the same high level of metallurgical performance as the XD model line of centrifugal concentrators.

The CD series concentrator has been proven through countless hours of reliable trouble-free operation in hundreds of mines worldwide. Mild-steel components make the CD series Knelson™ concentrator the popular choice and economic alternative of placer and hard-rock operators who do not require stainless-steel wetted components. It can be supplied with a manual control system or can be equipped to provide hands-free fully automated operation

The CD Advantage:

  • Centre-discharge design for fast concentrate removal
  • State-of-the art concentrate cone technology
  • Concentrate cone exchange program available
  • Low water requirement
  • Durable, long lasting Linatex® wear linings
  • Full automation package available
  • Heavy-duty bearing seal arrangement
  • Durable urethane-based finish


The CD series Knelson™ concentrator is available in four models. The CD10 and CD12 are suitable for primary concentration in low tonnage operations, for pilot scale test work and for the upgrading of gravity concentrates.

The CD20 and CD30 model centrifugal concentrators are suitable for production-scale operation typically in alluvial operations. The CD series can also be applied in hard rock mills which are considered low corrosion environments.

Specification Sheets

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