Rotary Rotor Radial Blades Melt Refining
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Solution Overview
Problem
Existing rotary devices for refining molten metals, such as those described in EP 0332292 and WO 2004/057045, do not effectively mix the melt and disperse bubbles throughout the melting vessel, leading to prolonged refining times and inconsistent slag composition due to accumulation of impurities at the bottom.
Innovation Solution
A rotary device with a cylindrical rotor attached to a hollow shaft, featuring two parallel disks connected by radial partitions, arcuate radial blades on the lower side, and longitudinal ribs on the rotor circumference to enhance bubble dispersion and mixing, creating a torus-shaped vortex that lifts impurities to the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the rotor is designed with a smooth circumference or recesses only, then the rotor offers little resistance to the molten metal and has extended service life, but the molten metal cannot mix effectively and bubbles cannot disperse throughout the entire melting vessel
Solution Approach 1:
The rotor circumference is segmented into multiple radial blades that divide the flow path of the molten metal. This segmentation creates multiple discrete flow streams that interact with each other, enhancing mixing efficiency while the blades remain attached to the rotor body, preserving structural integrity and service life.
Solution Approach 2:
Radial blades are added to the rotor design, introducing a new dimensional element that extends from the rotor surface into the melt. This transforms the rotor from a two-dimensional surface structure to a three-dimensional volume-displacing structure, enabling effective mixing without compromising rotor durability.
2Ease of manufacture
If the rotor does not extend beyond the cylinder contour, then manufacturing is simpler and service life is extended, but inclusions with higher specific gravity accumulate at the bottom of the vessel
Solution Approach 1:
The rotor design incorporates radial blades that dynamically interact with the molten metal during rotation, creating active mixing zones. This dynamic structure allows the rotor to maintain a compact cylindrical轮廓 for ease of manufacture while generating complex flow patterns that prevent inclusion accumulation and ensure homogeneous slag composition.
3Device complexity
If gas is supplied through radial channels without additional mixing structures, then the device structure is simpler, but bubble dispersion throughout the entire melting vessel is insufficient
Solution Approach 1:
The gas supply function and mixing function are merged into a single integrated rotor structure. The radial channels that supply gas also serve as the structural framework for the radial blades, eliminating the need for separate mixing components while achieving effective bubble dispersion throughout the melting vessel.
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 solution significantly reduces production time for removing impurities and metal content in slag, improving the consistency and composition of the refining process by thoroughly stirring the melt and distributing bubbles throughout the vessel.
Implementation Method 1
a rotary device that creates a vortex in the melt
Implementation Method 2
These bubbles permeate the melt, and hydrogen diffuses into them, rising with them to the surface
Implementation Method 3
hydrogen diffuses into them, rising with them to the surface
Data Source
Figure 1a~2c
Figure 3a~4c
Figure 5a~6c
AI summary
A rotational device for refining metal melts has a cylindrical rotor (1) fastened to a hollow shaft (2), which rotor is formed from two parallel discs (3, 4) connected to radial partitions (5), and has a central void (6), which is open at the bottom and is connected at the top to a feed bore in the shaft (2), wherein ducts (7) originate from the central void (6), which ducts are separated by the partitions (5) and are wider in the radial direction. The rotor (1) in this device is provided with radial vanes (8) on the underside.