Atomized Powder Processing Liquid Classifier System
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Solution Overview
Problem
Existing processes for producing reactive metal powders often result in powders with reduced flowability due to the presence of ultrafine particles adhering to fine particles, which are not effectively removed during sieving.
Innovation Solution
A method and system for processing atomized powders that involves contacting the powder with a removal liquid and adding energy to detach ultrafine particles from fine particles, followed by separating the removal liquid and ultrafine particles from the fine particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional sieving processes are used to produce reactive metal powders, then production efficiency is maintained, but ultrafine particles adhere to fine particles reducing flowability
Solution Approach 1:
A classification liquid is introduced as an intermediary medium to facilitate the separation of ultrafine particles from fine particles. The liquid enables density-based classification where ultrafine particles become suspended in the liquid while fine particles remain separated, significantly improving flowability without requiring complex mechanical modification of existing sieving equipment
Solution Approach 2:
The process changes the physical state and density parameters of the powder mixture by introducing a classification liquid. By controlling the liquid density and flow conditions, ultrafine particles are selectively suspended and removed, transforming the powder's flow characteristics from poor to excellent while maintaining a relatively simple process configuration
2Ease of operation
If ultrafine particles are removed from atomized powder, then flowability is significantly improved, but additional processing steps are required
Solution Approach 1:
The process employs hydraulic classification using a liquid medium to separate ultrafine particles from fine particles. By utilizing fluid dynamics and density differences, the system achieves effective particle separation in a continuous flow process, improving flowability without requiring multiple batch processing steps that would extend production time
Solution Approach 2:
The method utilizes phase transition of the classification liquid (between liquid and vapor states) to facilitate separation and subsequent drying of the powder. The liquid phase enables particle classification, while vapor phase removal efficiently eliminates the liquid from separated particles, achieving both flowability improvement and process efficiency
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
The process significantly improves the flowability of the reactive metal powders by removing ultrafine particles, enhancing the powder's ability to flow and perform in applications such as additive manufacturing.
Implementation Method 1
adding energy to the mixture of the atomized powder and the removal liquid with a liquid classifier system to detach the ultrafine particles from the fine particles, and separating, with the liquid classifier system, the removal liquid and the detached ultrafine particles from the fine particles
Data Source
AI summary
A method for removing ultrafine particles from an atomized powder includes contacting the atomized powder with a removal liquid to form a mixture of the atomized powder and the removal liquid, the atomized powder comprising fine particles and ultrafine particles, adding energy to the mixture of the atomized powder and the removal liquid with a liquid classifier system to detach the ultrafine particles from the fine particles, and separating, with the liquid classifier system, the removal liquid and the detached ultrafine particles from the fine particles.