Extended Duty (XD) Knelson™ batch concentrator

Specifically designed to withstand the severe operating conditions inherent to the hard-rock milling circuit

XD Concentrator
  • Overview
  • Services

The Extended Duty (XD) Knelson™ batch concentrator is the premium class of batch centrifugal concentrators available in the mining industry today. The XD was specifically designed to withstand the severe operating conditions inherent to the hard-rock milling circuit. Compact design, rugged construction and the highest possible level of quality components makes XD the unit of choice for the most demanding precious metal recovery applications.

The XD Advantage:

  • High-grade stainless-steel piping and rotor assembly quality
  • Compact design requiring 20% less floor space
  • Patented centre-discharge design for fast, secure concentrate removal
  • Latest design in concentrate cone technology
  • Concentrate cone exchange program available
  • One piece lift-away lid assembly
  • Two-piece rotor with detachable drive shaft
  • Two-piece feed tube with quick replace nozzle
  • Easy-clean water jacket flush ports
  • Full automation package available
  • Replaceable silt discharge nozzles

Concentrate Cone Exchange Program

FLSmidth Knelson offers a concentrate cone exchange program. This is a simple, cost effective and timely method of concentrate cone replacement that upgrades the customer's existing used cone with the latest in concentrate cone technology.

The concentrate cone is a key component in every Knelson™ concentrator, known for gold recovery, fine gold recovery and recovery of other precious metals. The concentrate cone consists of a highly durable polyurethane inner shell, stainless outer shell and separate wear parts consisting of a discharge wear cone and deflector pad.

Under typical conditions, a properly maintained Knelson™ concentrate cone will provide years of operational performance. In situations of poor maintenance, over-feeding and coarse feed, over time the concentrate cone will be subject to wear.

In the case where the concentrate cone requires repair or replacement, an alternative is available; the FLSmidth Knelson concentrate cone exchange program.

The advantage of this program is to provide FLSmidth Knelson customers with a next-to-new quality concentrate cone at a reduced cost and upgrade the customer to the latest in concentrate cone technology - G5 (Generation 5) concentrate cone.


  • Offers an upgrade to the latest in advanced concentrate cone technology 
  • Cost to repair the concentrate cone is less than purchasing a new cone 
  • Guaranteed FLSmidth Knelson quality standards on all concentrate cone re- manufacturing replacements 
  • Thorough inspection of concentrate cone 
  • Up to 60% reduced water consumption by upgrading to a G5 cone 
  • Up to 50% increased throughput 
  • Increased concentrate grades 
  • Improved maintenance features 
  • Improved wear resistance 
  • 1-year warranty on all re-furbished concentrate cone exchanges


How the Program Works

  1. Place an order (or quote) for an "exchange" concentrate cone through the online form. 
  2. The parts and service department will contact you with additional details as required 
  3. FLSmidth Knelson will ship a fully refurbished concentrate cone from their inventory 
  4. Upon receipt of the refurbished concentrate cone, simple "exchange" the re- furbished concentrate cone with your existing concentrate cone. 
  5. Send the old concentrate cone back to Knelson to credit the core value to your account

Specification Sheets

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