Ear on Processing
Understanding the root causes of bulk material flow failures with Solids Handling Technologies' Scott Miller
· Summarized
Key takeaways
- Proper testing of flowability is crucial to prevent failures in bulk solid storage systems.
- The angle of repose is not a definitive measure of flowability and can vary depending on conditions.
- Environmental factors greatly influence the flow properties of bulk materials, necessitating realistic testing.
- Understanding consolidation load and its impacts can prevent flow issues in materials.
- Continuous learning from both successes and failures is vital in managing bulk solids effectively.
Summary
Introduction to Bulk Solids Flowability
In this episode, Daniel Gatti from Processing Magazine introduces an article by Scott Miller on the complexities of bulk solids flowability. The discussion emphasizes the importance of understanding the flow properties of bulk materials to avoid storage failures.
Challenges of Flow in Storage Systems
The podcast details common issues in bulk solid storage systems, such as arching and rat-holing. It outlines how these failures occur when materials do not flow properly despite being in seemingly appropriate storage setups. Daniel emphasizes the need for realistic testing to predict and mitigate these issues.
Measuring Flow Properties
Scott Miller explains various methods for measuring flow properties, including shear and wall friction testing. This testing helps predict how bulk materials behave in storage and informs the design of storage vessels tailored to specific materials.
The Angle of Repose and Its Limitations
The podcast critiques the angle of repose as a flowability indicator, explaining that it can vary based on storage conditions. It underlines that flowability is not a constant and can change under differing stresses and circumstances.
Influence of Environmental Conditions
Daniel discusses how external factors such as temperature and humidity affect the flowability of materials. Specific materials are highlighted for their varying behaviors under different environmental conditions.
Case Study: Flowability of Salt
Listeners are presented with a case study on salt to illustrate how flowability depends on conditions such as humidity and stress. Testing under the worst-case scenario conditions is stressed as crucial for understanding real-world material performance.
Final Thoughts and Continuous Learning
The episode concludes with a reflection on the importance of humility in testing and handling bulk solids. Understanding that unforeseen factors can impact flowability encourages ongoing learning and adaptation in storage solutions.
Sponsors
- Solids Handling Technologies · Scott Miller, a senior consultant at Solids Handling Technologies, discusses bulk solids flowability and avoiding storage failures.
Show notes
This In Processing segment, an audio version of an article written by Miller, explores how consolidation load, storage time, and vessel geometry impact bulk solid flow performance in process manufacturing operations worldwide.
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