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Analyses for Cellulose Pulp

In pulp mills, it is of utmost importance to consider many different parameters to ensure both efficient operations and high quality of the produced pulp. One of the most crucial factors is the raw material used, namely wood.

Optimization of Pulp Production Through Analyses

The quality and composition of the wood directly impact the final product, and a consistent supply of high-quality wood is crucial to ensure stable and continuous production.

In addition to the raw material, the chemical environment in the production process is also of great importance. The chemical environment affects the fibers in the wood throughout the process, from cooking to bleaching and further to the formation of the finished pulp. Properly balanced chemicals and process parameters are essential to maintain fiber integrity and to avoid damage or quality issues in the final pulp.

Through careful monitoring and control of these parameters, pulp mills can ensure a consistent production of high-quality pulp, which is crucial to meet market demands and maintain a competitive operation. Therefore, continuous optimization and improvement of the process are of great importance to ensure efficiency, quality, and long-term sustainability in the pulp industry.

Maintaining control over pulp quality is essential for achieving good runnability and product quality. This is achieved through analyzing relevant pulp properties and fiber dimensions. RISE has packaged some analyses that provide a comprehensive overview of important properties.

Fiber Properties and Chemical Analyses

  • To ensure high-quality pulp production, it is crucial to conduct thorough analyses of both fiber and pulp properties. These analyses include a variety of parameters that provide insights into different aspects of the pulp's composition, structure, and performance.
  • When it comes to fiber and pulp properties, the analyses include:
  • - Schopper-Riegler degree (SR) / Canadian Standard Freeness (CSF) (ISO 5267-1, -2): This parameter measures the pulp's freeness, which is important for assessing how well the pulp can be processed in subsequent production processes.
  • - Water Retention Value (WRV) (ISO 23714): WRV measures the pulp's ability to retain water, which is relevant for process efficiency and product quality.
  • - Fiber dimensions (length, width, shape, weight, fines, distribution, curl, kinks): These parameters provide a detailed picture of the fiber properties and can affect the pulp's structure and final properties.
  • - Fiber content (microscopy): Analysis of fiber content provides information about the amount of fibers in the pulp, which is crucial for assessing pulp quality and usability.
  • - Fines content (Brit Jar) (SCAN CM 66:05): Fines content measures the proportion of fine particles in the pulp, which can affect properties such as sheet formation and basis weight.
  • - Sheet formation (Fineness test with or without drainage water) (ISO 5269): Sheet formation test assesses the pulp's ability to form sheets, which is an important property for the final product.
  • - Basis weight (ISO 536): Basis weight is a measure of the pulp's density and can affect its strength and durability.
  • - Thickness, density/bulk (ISO 534): These parameters provide information about the pulp's density and structure, which can affect its performance in various applications.
  • - Tensile strength properties (ISO 1924-2, -3): Tensile strength properties measure the pulp's strength and resistance to loading.
  • - Burst strength (ISO 2758): Burst strength is a measure of the pulp's strength and resistance to deformation.
  • - Tear strength (ISO 1974): Tear strength is an important property for assessing the pulp's durability and resistance to wear.
  • - Air permeability (ISO 5636-3): Air permeability measures the pulp's permeability to air, which can affect its ability to dry and be processed.
  • These are just a few examples of the many analyses performed to ensure high-quality pulp production. Each parameter provides important information that helps optimize the process and ensure that the produced pulp meets the desired specifications and requirements.
  • Chemical analyses play a crucial role in understanding the composition and properties of pulp and fiber. These analyses provide detailed information about various chemical components and compounds present in the pulp, which is important for assessing its quality, usability, and environmental impact. Below is a detailed description of some of the chemical analyses conducted:
  • - Carbohydrates (internal method): This analysis measures the amount of carbohydrates in the pulp, including sugars, starch, and other carbohydrate compounds. This is important for assessing the pulp's nutritional content and its potential use in various applications.
  • - Alpha-, beta-, gamma-cellulose (internal method): This analysis separates and quantifies the different types of cellulose in the pulp. Cellulose is the main component of plant fibers and is crucial for the pulp's strength and structure.
  • - Extractives content: This analysis measures the amount of extractable substances in the pulp, which can include soluble compounds, extractive substances, and other impurities.
  • - Free phenol groups (internal method): This analysis measures the amount of free phenol groups in the pulp, which may be of interest for assessing the pulp's chemical reactivity and environmental impact.
  • - Fiber charge (SCAN-CM 65): This analysis measures the amount of charge on the fibers in the pulp, which can affect their interaction with other chemicals and their ability to form sheets.
  • - Kappa number (ISO 302): Kappa number measures the pulp's ability to absorb water and other liquids, which can affect its ability to dry and be processed.
  • - Metals (SCAN-CM 38, 54, 63): This analysis measures the amount of metals in the pulp, which can be important for assessing the pulp's purity and its potential impact on the environment.
  • - Viscosity (ISO 5351): Viscosity is a measure of the pulp's liquid properties, which can be of interest for assessing its suitability for various applications.
  • - Washable COD/TOC (SCAN-C45, SCAN-CM44): This analysis measures the amount of washable organic compounds and total organic carbon in the pulp, which can be of interest for assessing its environmental impact.
  • By conducting these chemical analyses, a deeper understanding of the pulp's composition and properties can be obtained, which is crucial for optimizing the production process and ensuring that the produced pulp meets the desired requirements and specifications.

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. All relevant parameters significant to the specific analysis are included to provide a comprehensive picture of the situation. Additionally, detailed comments and explanations are provided to offer further insight and understanding of the presented data.

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Analyses for Cellulose Pulp

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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.

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