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Powder Mixing Engineering Guide

Powder Blending / Solids Mixing / Solids Blending

Powder Mixing Technology

A free online Engineering Guide to the mixing of powder, granules and more generally Bulk Solids.

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How to mix powders ? What is ordered mixing ? What is powder blending ? Our Mixing Engineering Guide gives access to all knowledge interesting to Process Engineers in the field of Dry Mixing to answer questions related to design or operations of mixing processes.

Dry Mixing of powder and solids


Coefficient of variation - How to calculate homogeneity of a dry-mix

Learn how to assess the homogeneity of bulk solids mixtures by calculating the coefficient of variation (CV). Find out how to compute the CV and interpret its significance. Discover the importance of considering confidence intervals when determining mixing quality. Ensure your mix meets specifications for a successful outcome.

Froude number

Explore the Froude Number and its importance in powder mixing. Learn how to calculate it, understand its significance, and discover its applications in different types of mixers. Access a free Froude number calculator for practical use.

Homogeneity

Learn how to assess the homogeneity of powder mixtures in an industrial setting. Discover the importance of defining what "homogeneous" means for your specific application and how to determine tolerances. Find out how to choose an appropriate tracer for analysis and understand the sampling process. Calculate the coefficient of variation (CV) to evaluate mixture uniformity and interpret the results using confidence intervals.

Loading sequence Batch mixers

Understand the significance of loading sequence in powder mixers. Learn how to optimize the order in which ingredients are loaded to achieve efficient mixing. Discover why small ingredients should not be loaded first and explore techniques for quick and effective loading. Additionally, find out how running the mixer at low speed during loading can enhance the overall mixing process and reduce cycle time.

Mixer ATEX speed

Learn how to prevent dust explosions in mixers by understanding the concept of "ATEX speed." ATEX speed is the critical rotation speed of a mixer's shaft where the tip speed of the agitator is maintained at 1 m/s. Running the mixer below this limit is essential during loading and discharging, which are stages where dust clouds can form. This precaution minimizes the risk of dust explosions. Calculate the ATEX speed using a straightforward equation and the radius of the mixing tool. Ensure your mixer operates safely and efficiently.

Mixer discharge time - Improve discharging time of mixer

Learn about mixer discharge time and how to optimize it. Discharge time refers to the time required to empty a bulk solids mixer, and it's crucial for efficient batch operations. The weight discharged follows a specific pattern during the process, with the last portion taking longer to remove. Discover ways to speed up the unloading process, such as controlling the discharge using a timer and running the mixer at a low speed. Different types of discharge valves are also explained, providing insight into their discharge times. Get a better understanding of optimizing discharge times for batch powder mixers.

Mixing mechanisms

Learn about the different mixing mechanisms for bulk solids and which type of industrial mixer is suitable for each category. Understand diffusive mixing, where particles move randomly, and discover mixers like tumbler mixers and drum blenders that fall into this category. Explore convective mixing, which involves a forced movement of solids using an agitator, and its applications in mixers like ribbon blenders. Finally, delve into shear mixing, which efficiently breaks down agglomerates, and learn about mixers like ploughshare mixers that utilize shear forces. Get insights into the pros and cons of various mixer types.

Mixing speed

Optimizing dry mixing processes? Understand mixing speed's critical role. Quicker speed shortens mix time but can damage solids. Find typical mixing speeds for various mixers to guide your process.

Mixing time - Calculate and improve mixing time

Want to optimize your powder dry mixing process? Learn about factors influencing mixing time. Mixing volume, speed, and Froude number matter. Get insights into typical mixing times for various mixers. If your mixing time is too long, check mixer speed, loading, and more.

Mixing tool tip speed

Learn how to calculate agitator tip speed. Understand its importance, especially regarding ATEX safety limits. Access a free Excel calculator for tip speed calculation, applicable to various agitators. Boost your knowledge today.

Liquid addition to dry mix

Discover techniques for efficiently incorporating liquids into dry powders during industrial mixing. Explore methods such as spraying and injecting, optimal mixer types, and the importance of liquid addition for granulation and enhancing mixing performance.

Best mixers

Find the ideal powder mixer for your specific application. This guide explores mixing purposes, capacity, ingredient properties, and more to help you make the right choice. From small-scale manual operations to large-scale automated processes, discover the best mixer options for your needs.

Powder mixing troubleshooting guide

Optimize your powder mixing process with practical solutions. Learn how to reduce mixing time, improve homogeneity, minimize powder breakage, speed up discharge, and increase your mixer's capacity.

Mixing volume - Minimal Nominal Maximum volume - Increase mixer capacity

Discover the essential details for selecting and sizing batch powder dry-mixers. Learn about mixer size ranges, understand useful volume vs. total volume, and calculate the right mixer capacity for your production line.

Power consumption

Learn about the factors affecting the energy consumption of powder mixers. Explore the specific power consumption for various mixer types, helping you understand and optimize your mixing processes more efficiently.

Sampling

Discover the essentials of sampling in the context of dry mixing. Learn why sampling is crucial for assessing homogeneity and explore different methods and tools to ensure effective and reliable results.

Segregation and Demixing

Explore the factors behind powder segregation and its impact on mixing processes. Discover the mechanisms leading to segregation and practical tips for minimizing its effects to achieve better blend uniformity.

Powder blend homogeneity and particle sizes

Learn how particle size impacts blend homogeneity in your mixing processes. Discover the mechanisms of segregation due to particle size differences and explore ways to improve blend uniformity through material specification, pre-grinding, and post-grinding.

Continuous mixing

Explore continuous dry mixing processes, their underlying principles, and suitable mixer types. Learn how to control these processes and discover a wide range of applications across various industries, including food, pharmaceuticals, chemicals, ceramics, and construction materials.

Differences batch mixing and continuous mixing

Considering a new solid mixing system? This webpage offers a comparison between batch and continuous mixing for pharmaceuticals, food, and chemicals. It helps you weigh factors like recipe complexity, capacity, layout requirements, segregation, competency, and more, aiding in your technology choice.

Loss in weight feeding

Interested in Loss In Weight Feeders (LIWF)? This webpage explains what they are and how they control material dosing by measuring weight changes over time. It delves into dosing control, design considerations, accuracy, hopper capacity, material flow, and process interfaces to help you understand and utilize these feeders effectively.

Preblend - Premix

Learn about preblend and premix in the powder industry. Understand why you might choose to preblend, how to preblend, and the mixing quality required for this process. Explore the concept of a carrier ingredient in preblends.

Food powder mixing

Explore this informative page to gain insights into the world of food powder mixing. Whether you're a small-scale business owner looking for practical mixing solutions or part of a large-scale production facility aiming to maintain high-quality standards, this resource offers valuable guidance. Learn about different mixer types and their suitability for various applications, ensuring you make the right choice for your specific needs.

Blending cohesive powders

Learn how to tackle cohesive powders effectively. This page provides insights into the challenges of mixing these materials, offers guidance on choosing the right mixer, and highlights an advantage: reduced segregation post-mixing. Don't let cohesive powders hinder your production; discover the solutions here.

Dry mixing of cements

Learn how bulk solids Process Engineering plays a crucial role in construction. Discover the right mixers for dry-mixing cements and mortars. From single shaft to planetary mixers, find the perfect solution for your construction needs. Plus, explore options for adding water to create wet concrete and mortar.


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