Pulping Testing & Properties 

Scope and Learning Objectives:
These labs and videos demonstrate various procedures used to analyze raw materials such as wood, chips, pulping liquor, bleaching chemicals; and the resulting pulp. They will also illustrate with video demonstrations the pulping process, screening, bleaching, preparation of laboratory handsheets, flotation deinking, microscopes, and others. The overall learning objective is to increase your understanding of why and how these tests and procedures are performed.

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If you are studying these laboratories as part of a training or educational program, it is recommended that you complete all of the labs, including the thought questions at the end of each lab. Some of the labs will require calculations and analysis of data, and other labs will provide final data without calculations. The outline you should follow for each lab is:

1. Read the Objectives.
2. Read the section on Background to familiarize yourself with the topic and test.
3. Perform the Tasks

3.1 View the Testing Video 3.2 Review Instructor directions; and/ or the appropriate Lab Manual instructions; and/or the TAPPI Standard, or Useful Method in for in depth details and instructions. 3.3 Perform the tests and collect the data; or use the video data. Do the Calculations, if required.

4. Answer the Thought Questions.

Topics:

Introduction and Overview Laboratory Safety Chip Evaluations 1. Chip Moisture & Density 2. Chip Classification Pulping Liquor Analysis 3. White Liquor ABC test Pulping 4. Pulping Digester Operation 5. Screening of Pulp Bleaching of Pulp 6. Pulp Bleaching 7. Pulp Brightness 8. Bleach Liquor Analysis

Analysis & Testing of Pulp 9. Permanganate Number of Pulp 10. Viscosity of Pulp 11. CSF Freeness of Pulp 12. Consistency of Pulp 13. Refining of Pulp – Valley Beater 14 Refining of Pulp – PFI Mill 15. Preparation of Handsheets 16. Use of Microscopes Recycling 17. Flotation Deinking