Combined XRF-XRT X-Ray Separator for Coated Metal Sorting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing X-ray separators for sorting nonferrous metals in recycled materials face limitations in spatial and chemical resolution, particularly when dealing with heterogeneous materials and surface coatings, leading to inaccurate identification and separation of metals like aluminum and copper.
Innovation Solution
A combined X-ray separator that simultaneously performs both XRF and XRT analyses using a single source, with optimized parameters for fluorescence and transmission sensors, allowing for synchronized data acquisition to enhance spatial and chemical resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If eddy current separators are used to remove ferrous and non-ferrous metals, then metal removal capability is improved, but the system requires multiple separate units increasing device complexity and space requirements
Solution Approach 1:
The patent combines ferrous and non-ferrous metal separation into a single integrated eddy current separator unit. The separator is configured with a drum that generates eddy currents to repel both ferrous and non-ferrous metals simultaneously, eliminating the need for multiple separate separator units while maintaining effective metal removal capability from the mixed recyclable material stream.
2Measurement precision
If multiple separate separator units are used for ferrous and non-ferrous metals, then separation effectiveness is improved, but processing time increases due to sequential processing
Solution Approach 1:
The integrated eddy current separator enables continuous simultaneous separation of both ferrous and non-ferrous metals in a single pass through the recyclable material stream. The drum rotates continuously, maintaining constant eddy current generation that repels metal contaminants without interruption or sequential processing steps, thereby reducing processing time while maintaining separation effectiveness.
3Productivity
If multiple separate separator units are deployed, then metal separation capability is improved, but the system occupies more space increasing facility requirements
Solution Approach 1:
The patent integrates the functionality of multiple separate separator units into a single compact eddy current separator. By combining ferrous and non-ferrous metal separation capabilities in one unit with a shared drum and housing, the system achieves equivalent metal separation capability while occupying significantly less facility space than would be required for multiple separate units.
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 combined system provides enhanced accuracy in identifying metal compositions and shapes, overcoming individual technique limitations, enabling reliable separation of metals with surface coatings and internal inhomogeneities, and reducing costs compared to separate systems.
Implementation Method 1
an eddy current separator to separate ferrous and non-ferrous metals from the processed material
Implementation Method 2
separators that utilize eddy currents to remove metal contaminants from a stream of processed material
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An X-ray separator for sorting metals from recycled material includes an X-ray source (1) that produces a radiation beam (2) capable of passing through the material carried by a conveyor belt (3) and reaching an array of transmission sensors (4) and also generating a fluorescence signal that is detected by an array of fluorescence sensors (5) placed adjacent to the beam (2), so that the separator simultaneously performs both fluorescence and transmission analysis using both phenomena caused by the single beam (2).