BUSS Kneader series KX

The most efficient mixing technology for anode paste

For more than 60 years the Buss Co-Kneader series KE and CP have been the benchmark for cost-effective compounding of anode paste. We continue the tradition with genuine KX technology. Safe. Efficient. Proven.

In 2012, ten years after the successful introduction of 4-flighted screw technology in plastics compounding – thereby doubling output rates and setting new benchmarks in terms of mixing efficiency – Buss AG undertook to adapt and enhance the proven solver-based math model-ling tools for anode paste mixing.

The resulting 4-flighted KX geometry has the fol-lowing main advantages over traditional 3-flighted technology:

  • Up to 50% more throughput for
    the same machine size
  • More intense mixing thanks to 33%additional shear surface
  • Improved microdispersion due to 45%higher flow separation rate
  • Bigger volumetric capacity

Process Aspects

The KX process zone is divided into four sections, each with a specific purpose and screw geometry:

  • Intake section: The intake section takes up the incoming coke and transports it into the process zone by feeding elements with continuous flights.
  • Transition section: In the transition section, liquid pitch is directly injected into the feedstock via drilled kneading bolts. At the end of this section, the screw profile changes from transport to mixing and kneading.
  • Kneading section: In the kneading and mixing section, the focus is on optimum mixing. Innumerable flow separations and reorientations with uniform shear rates ensure maximum homogeneity.
  • Dynamic throttling: Dynamic throttling is an innovative feature that replaces the flap-die used previously. Screw flights with reduced feeding effect slow down the mass flow to increase the filling degree in the kneading section, resulting in optimized mixing.