Composite Powder Mixing Uniformity Evaluation via Flow Energy
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Solution Overview
Problem
Current methods for evaluating the mixing uniformity of composite powders are time-consuming, labor-intensive, costly, and not suitable for colored materials, lacking a convenient, rapid, and universal solution.
Innovation Solution
An evaluation method involving determining the raw materials' mass ratio, mixing them for varying times, analyzing flow energy using a Turbula mixer and powder analyzer, and calculating a percentage difference in flow energy to assess uniformity, with a percentage difference of ≤5% indicating uniform mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chloride ionic-selective electrode method is used to determine mixing uniformity, then measurement precision is improved, but loss of time and labor increases
Solution Approach 1:
The patent replaces chemical determination methods (chloride ionic-selective electrode method) with a physical flow energy measurement method. By measuring the flow energy characteristics of the composite powder directly, the invention eliminates time-consuming chemical analysis while maintaining measurement accuracy for mixing uniformity evaluation.
Solution Approach 2:
The invention uses flow energy characteristics as a proxy or copy of the mixing uniformity state. Instead of directly analyzing chemical composition, the method measures flow energy which correlates with mixing uniformity, providing a rapid indirect assessment that avoids lengthy chemical determination processes.
2Ease of operation
If methyl violet method is used to evaluate mixing uniformity, then ease of operation is improved, but object-affected harmful factors increase due to material pollution
Solution Approach 1:
The patent replaces the methyl violet staining method (which uses chemical dyes that can pollute materials) with a mechanical flow energy measurement approach. The flow energy measurement uses no chemicals or stains, thereby eliminating material pollution while maintaining operational simplicity through direct physical measurement.
3Measurement precision
If particle size distribution method or near infrared spectroscopy method is used, then measurement precision is improved, but device complexity and equipment cost increase
Solution Approach 1:
The invention employs a relatively simple flow energy measurement apparatus instead of complex particle size analyzers or near infrared spectroscopy equipment. This approach uses more accessible, less expensive equipment while achieving the same measurement objective, reducing both device complexity and equipment cost.
Solution Approach 2:
The patent substitutes complex optical or particle analysis systems with a mechanical flow energy measurement system. By measuring the energy required to move or fluidize the powder, the invention achieves mixing uniformity assessment using simpler mechanical principles rather than sophisticated optical or analytical instrumentation.
4Measurement precision
If complex analysis equipment is used for determination, then measurement precision is improved, but productivity decreases due to long processing cycle
Solution Approach 1:
The invention replaces complex, time-consuming analytical equipment with a rapid flow energy measurement system. The mechanical measurement can be performed quickly without extensive sample preparation or long analysis cycles, thereby significantly improving processing throughput while maintaining measurement precision.
Solution Approach 2:
The method uses flow energy characteristics as a rapid proxy for mixing uniformity, enabling quick assessment without lengthy chemical or optical analysis. This copying approach allows for fast measurement that enhances productivity while preserving the essential information about mixing quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides a convenient, rapid, and universal evaluation of mixing uniformity, ensuring composite powders are uniformly mixed by stabilizing flow energy within a specific percentage difference, thus ensuring product quality and nutritional distribution.
Implementation Method 1
a propeller rotating deeply from a surface layer of the volume-fixed composite powder to be determined, recording a height H of the propeller entering the composite powder to be determined in real time, and determining flow energy TFEH of composite powder to be determined at corresponding height
Implementation Method 2
mixing the raw materials according to the amount ratio to obtain multiple standard composite powders with different mixing time, wherein a mixing time difference between any two adjacent standard composite powders is not be less than 30 s and not more than 5 min
Data Source
AI summary
An evaluation method of mixing uniformity of composite powder includes: determining raw materials of composite powder to be evaluated and mass ratio; mixing to obtain multiple standard composite powder with different mixing time; determining flow energy of each standard composite powder; analyzing the flow energy of multiple standard composite powders by significant difference method, determining at least 3 consecutive standard composite powders with no significant difference in flow energy according to mixing time from small to large, defining as uniform-mixed standard composite powder, calculating average value of flow energy of uniform-mixed standard composite powder, and recording as standard flow energy TFEs; determining the flow energy of composite powder to be evaluated, calculating percentage difference P·Vds between TFEd and TFEs, and evaluating mixing uniformity of composite powder according to P·Vds.