High Melting Point Metal Atomization Nozzle Design
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Solution Overview
Problem
Conventional methods for producing fine metallic powders struggle to achieve small particle size, low standard deviation in size distribution, and spherical shape, particularly for high melting point metals and alloys, leading to low recovery and quality issues in applications like electronic devices, 3D printing, and catalytic materials.
Innovation Solution
A novel atomization process with a specific atomization nozzle design, including a diverting channel and controlled gas flow, which adjusts the angle and velocity of the atomization gas to achieve a high melting point metal or alloy powder with a small standard deviation in particle diameter and improved sphericity, using an inert gas environment and water injection to prevent oxidation and enhance powder collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional atomization techniques are used to produce fine metallic powders, then production cost is reduced, but particle size distribution standard deviation increases and sphericity decreases
Solution Approach 1:
The atomization process is segmented into multiple controlled stages: molten metal is divided into droplets through a specialized nozzle, then further atomized by gas flow, and finally collected in controlled portions. This segmentation allows precise control over particle size distribution while maintaining manufacturability.
Solution Approach 2:
The invention employs dynamic control of atomization parameters including variable gas flow rates, adjustable nozzle positions, and controlled molten metal flow rates. This dynamic adjustment enables optimization of particle size distribution standard deviation without requiring complete process redesign.
2Productivity
If conventional atomization techniques are used, then equipment simplicity is maintained, but powder recovery in defined size fraction decreases
Solution Approach 1:
The system incorporates feedback control mechanisms where particle size distribution is monitored and atomization parameters are automatically adjusted to maintain optimal recovery yields. This feedback loop maximizes powder recovery in defined size fractions while managing system complexity through automated control.
Solution Approach 2:
The invention systematically varies critical parameters such as atomization gas pressure, molten metal temperature, and nozzle geometry to optimize powder recovery. By controlling these parameters within specific ranges, high recovery yields are achieved without requiring excessively complex equipment configurations.
3Shape
If conventional atomization methods are used, then process simplicity is maintained, but particle sphericity and size uniformity deteriorate
Solution Approach 1:
The atomization nozzle is specifically designed with curved surfaces and optimized geometries that promote spherical droplet formation. The nozzle internal flow paths are contoured to minimize turbulence and promote uniform spherical particle shapes, directly addressing the sphericity requirement through geometric design.
Solution Approach 2:
The nozzle design incorporates asymmetric flow channels and angled injection patterns that create controlled turbulence and promote uniform spherical formation. This asymmetric design breaks up irregular droplet shapes and enhances sphericity without requiring overly complex multi-component nozzle assemblies.
4Length of moving object
If finer particle sizes are targeted, then application requirements are met, but standard deviation in size distribution increases
Solution Approach 1:
The system performs preliminary classification of particles during the atomization process itself, using controlled gas flow patterns to separate particles by size before collection. This preliminary action ensures that fine particles are isolated with minimal variation in size, maintaining low standard deviation even at reduced particle dimensions.
Solution Approach 2:
The invention introduces an additional spatial dimension for particle classification by using vertically stacked collection zones with different gas flow velocities. This dimensional approach allows simultaneous collection of fine particles with consistent size distribution while maintaining control over standard deviation through height-based separation.
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 produces fine spherical powders with a low standard deviation in size distribution, achieving higher yields within a prescribed particle size range and improved sphericity, reducing oxidation and agglomeration, and enhancing the quality of high melting point metal powders for various industrial applications.
Implementation Method 1
a) providing a molten high melting point metal or alloy to an atomization zone; b) providing at least one atomization gas stream to the atomization zone
Implementation Method 2
providing at least one atomization gas stream comprising an inert gas to the atomization zone
Implementation Method 3
The atomization manufacturing process may further comprise the step of adding water in the atomization chamber
Data Source
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AI summary
There are provided high melting point metal or alloy powder atomization manufacturing processes comprising providing a melt of the high melting point metal or alloy through a feed tube; diverting the melt at a diverting angle with respect to a central axis of the feed tube to obtain a diverted melt; directing the diverted melt to an atomization area; and providing at least one atomization gas stream to the atomization area. The atomization process can be carried out in the presence of water within an atomization chamber used for the atomization process.