Kraft Pulp Mill Consulting


Who Should Attend:

  • Process Engineers wishing to received a fundamental grounding in fiber screening. 
  • Operators who have never had any formal classroom training on the subject of screening. Turn your operators from people who "run" a screen room to someone who can "operate" a screen room. 
  • Foremen, superintendents and managers who need to gain a more thorough knowledge of the theory and practice of screening. 

Topics to be covered:

  • Intro: Why screen?; Why clean?; What's the difference?
  • Gravity Screens
  1. Theory of operation 
  2. Typical Arrangement 
  3. Operating Practices
  4. Operational Issues & Troubleshooting
  • Pressure Screens
  1. Theory of Operation
  2. Typical Arrangements
  3. Operating Practices
  4. Screen Plate Design - Slots vs. Perforations
  5. Operational Issues & Troubleshooting
  • Mass Balances Around Screens
  • Rejects Handling
  • Centrifugal Cleaners
  1. Theory of Operation
  2. Arrangement within Screen Rooms
  3. Operational Issues & Troubleshooting

Learning Outcomes:

Upon completion of this one day course, the attendee can expect to know:

  1. The operating principles upon which the modern day screen room is based

  2. The typical arrangement of screens within a screen room and the reasons for it.
  3. The student will be able to outline a mass balance around a screen room to aid in optimization work.
  4. The common process problems faced in a screen room and ways to remedy them.
  5.  The student will have a basic understanding of centrifugal cleaners and how they can be incorporated into a screen room system.


Who Should Attend

  • Process engineers and Technical Assistants needing a thorough grounding in the way that the Kraft pulping liquor cycle operates.
  • Operators, Shift Foremen and Day Foremen who work in the Recovery, CZX or Lime Kiln area that have never had any formal training in how their portion of the recovery cycle fits into the whole.
  • Vendor personnel that service the Kraft pulp mill that need an understanding of the Kraft liquor cycle
  • Non - technical personnel who desire to learn about the cyclic nature of the Kraft pulping cycle. This can be a powerful tool from the standpoint of promoting mill image in the community. Since the basics of the environmental mandates of the recovery cycle are included, these employees will gain a proper understanding of the conservation of chemicals that is achieved by the mill.
    Topics to be covered:
  • Intro: The nature of the Kraft pulping process - its cyclic nature and importance of that concept.
  • White Liquor
  1. Chemical composition and its action on pulp
  2. Sulphidity - what is it and why does it matter?
  3. Major pulping variables and their implication
  • Black Liquor
  1. Brown Stock Washing
  2. Evaporation & Concentration
  3. Recovery Boiler Operation
  • Concept of reduction and its importance
  • Smelt tank operation
  • Green Liquor
  • Recausticizing & Lime Kiln Operation
  1. Slaking Reaction 
  2. Recausticizing reaction
  • Environmental Considerations in the modern Kraft mill
  1. Air emissions
  2. Effluent emissions and their treatment

Learning Outcomes:

Upon the completion of this one day course, the student can expect to:

  1. Understand the fundamental workings of the chemical cycle in a modern Kraft pulp mill.

  2. Be able to appreciate the "closed" nature of the process and the conservation of chemical components that it represents.

  3. Understand the interrelationship of the individual operations that compose the "liquor side" of the pulp mill and their importance to one another.
  4. Have a basic understanding of the environmental mandates under which a modern Kraft mill operates and how these mandates are met and dealt with.


Short Courses & Operator Training

At the present time three different short courses are being offered. If you have need of operator training in another area, please contact us and we will set up something uniquely suited to your needs.

Please call or email for a quote for a presentation of any of these courses at your mill

The local Paper Mill – What A Good Neighbor!

Topics to be covered:

  • ​Conservation of wood resources in today's mill
  • What causes the pulp mill's odor
  • Air pollution and how it is controlled
  • Water pollution and how it is controlled
  • Post consumer recycling - problems and opportunities

Learning Outcomes:

Upon completion of this 1/2 day course, the attendee can expect to know:

  1. Why it is not necessary to use paper substitutes to "save trees"
  2. How modern pulp mills control all emissions to safe environmental levels that do not cause harm

Pemble Consulting