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Language: English Portuguese Russian
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Kraft Pulping Series (Details)Includes 12 courses for $499/year. Pulping Library (Details)Includes 72 courses for $1,499/year.
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Training Time: 31 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Portuguese, Russian
The purpose of a brown stock system is to process the brown stock, and, usually in this order: remove high density trash, break down or remove uncooked wood, and wash black liquor from the brown stock. This module will explain the process steps within a brown stock system, and the various types of equipment which are used to accomplish each operation.
At the end of this module, you will be able to:
The following key questions are answered in this module:
What is brown stock?Brown stock is the name for the mixture of cooked wood chip and cooking liquor that is discharged from a digester.
What is the goal of a brown stock system?The purpose of a brown stock system is to remove all components of the cooked, discharged pulp mixture from the digester that would interfere with paper or board making.
Why is are rock trap located immediately after the digester?The rock trap removes dense components such as rocks that might damage downstream equipment.
What is the purpose of brown stock screening?Brown stock screening relies primarily on size differences to remove components which are no suitable for paper or board making.
What is being washed from the pulp in brown stock washers?Spent cooking chemicals, or ""black liquor"", is washed from the cooked pulp in the brown stock washers.
Below is a transcript of the video sample provided for this module:
Brown Stock Screening
View Course
Brown Stock Washing
Continuous Cooking Introduction
Kraft Recovery Boilers - Liquor System
Recausticizing Fundamentals
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