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Analysis of Wood Chips for Paper Production and Pulp

The quality of the wood chips is crucial for pulp manufacturing, and at RISE, we offer several different analyses to ensure the quality of the wood chips. By carefully examining and assessing various properties, we can identify any deficiencies or deviations that may affect the production process and the quality of the resulting pulp.

Purpose

We analyse several key parameters in wood chips, including bark content, moisture content, bulk density, and dimensions, to ensure high-quality pulp production:

  • Bark content: Affects pulp quality by introducing impurities; measurement indicates how well the chips have been cleaned.
  • Bulk density: Reflects the packing density of the chips, influencing flowability and the absorption of cooking chemicals.
  • Dimensions and thickness: Consistent size distribution and optimal thickness are crucial for effective impregnation, chemical absorption, and uniform cooking quality.

These parameters collectively optimise the process and enhance the quality and uniformity of the pulp.

Methods

  • Dry content SCAN-CM 39:94 Determination of bark content in wood chips for the production of chemical and mechanical pulps. It is applicable for the determination of wood grade chips, preferably in conjunction with the method of chip size distribution described in SCAN-CM 40.
  • Size distribution SCAN-CM 40:01 Classification of wood chips intended for the production of chemical and mechanical pulps and is applicable in determining the quality of wood chips in terms of chip size and fineness.
  • Bark content SCAN-CM 42:06 Determination of bark content in wood chips for the production of chemical and mechanical masses. 
    Dry-Crude Density or Bulk Density SCAN-CM 46:92 Method for determining the bulk density of wood chips intended for the production of chemical or mechanical pulps. It is also possible to measure the bulk volume of wood chips, i.e. the volume of loosely packed chips. 
  • Thickness and thickness distribution SCAN-CM 47:92 The method is applicable in determining the quality of wood chips. 
    Length and length distribution, width and width distribution SCAN-CM 48:01 Determination of mean length and length distribution of wood chips intended for the production of chemical or mechanical pulps (accepted chips). 
  • Wood content in bark fraction SCAN-CM 53:94 Determination of the wood content of the bark fraction from a bark drum or from other debarking machinery. The method is applicable in the determination of wood losses in the debarking process. The total timber loss also includes breakage.
  • Dry-raw density SCAN-CM 43:95 Determination of the basic density of wood chips for production of chemical and mechanical pulps.

 

  • Metals
  • Extractives
  • Carbohydrates
  • Ash content

Delivery

RISE offers a report that includes data in Excel format and relevant images and diagrams. It is carefully compiled using standard methods for the conducted analyses. The report also includes an assessment of measurement uncertainty to ensure the reliability of the presented results. 

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Service

Analysis of Wood Chips for Paper Production and Pulp

Instrument

Density, Weights, Balances

Metrology Area

Humidity, Length and geometry, Mass / Weight

Price

Price on tender

Delivery time

The delivery of results is scheduled based on our order backlog and the scope as well as the complexity of your assignment. We aim to ensure that your results are delivered on time, taking into account the specific requirements of your project. Thank you for your understanding and patience as we work to provide you with the best possible service.

Supports the UN sustainability goals

3. Good health and well-being
6. Clean water and sanitation
7. Affordable and clean energy
8. Decent work and economic growth
9. Industry, innovation and infrastructure
11. Sustainable cities and communities
12. Responsible consumption and production
13. Climate action
14. Life below water
15. Life on land

Contact person

Mats Westin

Forsknings- och utvecklingsingenjör

+46 10 722 32 49

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Lars Sundvall

Contact person

Lars Sundvall

Gruppchef Processteknik

+46 70 526 52 21

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