High Consistency Refining

SKU: C-693Duration: 20 Minutes Certificate Included

Pay-per-view (PPV) format perfect for individual users.

Get immediate access to this interactive eLearning course online. Must be used within 30 days, expires 48 hours after launch.

Great for in-person classroom training or as an alternative to DVD.

Includes printable documents and Convergence Video Player for Windows systems. Content expires after 1 year.

Ideal for corporate licensing and volume users who also need administrative tracking and reporting on training.

Get this interactive eLearning course into your LMS or learn how you can leverage our LMS to deliver training to your workforce.

Need multiple courses or have lots of users? Just let us know a little more about what you need and we’ll get you some great volume pricing.

 Need help deciding? Compare delivery formats.

Course Details

Specs

Training Time: 20 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Refining is the mechanical treatment of pulp fibers to develop paper and board sheet properties. The two main types of refining are low consistency refining and high consistency refining. This module will examine the design and operation of high consistency refining systems.

Learning Objectives

At the end of this module, you will be able to:

  • Identify safety hazards and safety guidelines associated with refiners
  • Differentiate between low consistency and high consistency refining
  • Identify and describe the equipment used in high consistency refiner systems
  • Describe the design and operation of high consistency refiners
  • Identify the sheet properties affected by high consistency refining

Key Questions

The following key questions are answered in this module:

How does high consistency refining differ from low consistency refining?
Low consistency refining increases the fibers' surface area available for bonding and several sheet strength properties. However, it reduces freeness and drainage. High consistency refining creates microcompressed and curly fibers, which improve sheet stretch and porosity, as well as some strength properties, like tear. It also reduces freeness and drainage, but to a lesser degree.

On what paper or board grades is high consistency refining used?
High consistency refining is well-suited to the production of kraft sack papers and other similar grades which must withstand high levels of strain during use.

At what consistency is high consistency refining performed?
High consistency refining is performed above 20% consistency, and consistencies between 30 and 40% are quite common.

How is 30 to 40% consistency stock transported to the high consistency refiners?
Screw conveyors are typically used to move high consistency stock from the presses to the refiners.

What happens to the filtrate that is removed from the stock by the presses that are positioned ahead of high consistency refiners?
This filtrate can be used to redilute the stock after it has been refined, before it is metered back into the papermaking process.

Sample Video Transcript

Below is a transcript of the video sample provided for this module:

High consistency refiners are typically disc type refiners, which utilize one rotating disc or rotor and one stationary disc or stator. The process sides of the discs are fitted with metal refining plates which are covered with a variety of raised bars. A screw type or ribbon type feeder delivers a constant flow of high consistency stock into the center of the space between the two discs. Refining takes place as the stock travels outward between the bars of opposite discs as the rotor rotates. The rotor is driven by a large motor and a smaller motor is used to adjust the gap between the plates. This adjustment is called opening and closing the plates.

Customer Q&A

Ask a Question

Sorry, we're missing some information

I would like to have several employees take multiple courses. How can I set that up?

We're in the process of making bulk course and multiple user purchases easier. But for now, you can order multiple courses and contact us with details on who you'd like to assign courses to. We can set up each user's training plan and make sure everyone gets the eLearning assignments they need.

Can I get a free full-length preview of a course to see what this course covers?

While we do our best to offer details on course contents, we don't normally offer full-length previews. But please contact us with more details for a better understanding of what your organizaton needs and how we can help.

Do I get a certificate when I complete a course?

Yes. All of our courses allow you to print a completion certficate upon successfully passing the integrated test at the end of each eLearning course.

How do I log in to take a course that I have already paid for?

You'll receive an email with login details moments after you purchase your pay-per-view (PPV) course. Just click the login link and enter the user name and password provieded.

Do you have courses in different languages?

Yes. While all of our courses are originally produced in English, we develop many courses in a growing number of languages, including Chinese, Dutch, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Tamil, and Thai. Availabl languages are normally displayed in the Course Details section on each course page.
Added to Cart! Click here to view your cart.