Magnetic Riffle Gravity Separator for Heavy Metal Recovery
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Solution Overview
Problem
Existing gravity recovery systems lack flexibility in riffle size, shape, and distribution, and require mechanical intervention for disassembly and reassembly, limiting their effectiveness in separating nonmagnetic heavy metal particles like mercury and platinum, and are inefficient in removing metals from water supplies contaminated with lead.
Innovation Solution
A gravity separation system utilizing a geometrically patterned magnetic field generated by a reversible array of permanent and electromagnets to form magnetite riffles of variable shapes and sizes, allowing for instantaneous disassembly and reassembly without mechanical intervention, which traps and sediments metal particles effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If rigid linear riffles are used in gravity recovery systems, then the structure is simple and stable, but the flexibility in riffle size, shape, and distribution is lost
Solution Approach 1:
The patent applies dynamics by replacing static rigid riffles with dynamic magnetic fields that can be adjusted in strength, pattern, and configuration. The magnetic field strength can be varied to control riffle formation, and the field pattern can be changed to create different riffle geometries, providing adaptability without mechanical complexity
Solution Approach 2:
The patent substitutes mechanical riffle structures with magnetic field-based riffle formation. Instead of physically constructing and adjusting rigid riffles, the system uses magnetic fields to induce magnetite particle aggregation into riffle patterns, eliminating mechanical complexity while maintaining structural functionality
2Ease of operation
If conventional sluice box systems are used, then the structure is simple, but mechanical intervention is required for disassembly and reassembly
Solution Approach 1:
The patent replaces mechanical assembly and disassembly operations with magnetic field control. The magnetic field can be instantly activated or deactivated to form or disperse riffles, eliminating the time-consuming mechanical disassembly and reassembly process while improving operational ease
Solution Approach 2:
The system employs periodic activation and deactivation of magnetic fields to control riffle formation and dispersal. This periodic magnetic action allows rapid cycling between operational states without mechanical intervention, reducing time loss while maintaining ease of operation
3Productivity
If magnetite particles are used to form riffles, then nonmagnetic heavy metal particles can be recovered, but the magnetic field must be continuously applied to maintain riffle structure
Solution Approach 1:
The patent applies preliminary action by pre-forming magnetite riffles before the actual separation process. Once formed, these magnetite riffles maintain their structure through particle interlocking and gravity, allowing the magnetic field to be reduced or interrupted during operation, thus maintaining productivity while reducing energy consumption
Solution Approach 2:
The system changes magnetic field parameters from continuous strong fields to intermittent or reduced-strength fields once riffles are formed. This parameter change maintains the structural integrity of magnetite riffles through gravity and particle interactions, reducing energy consumption while preserving the productivity of nonmagnetic heavy metal recovery
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 system enables efficient separation and recovery of metal particles by creating regions of reduced flow with variable riffle patterns, enhancing the trapping of fine particles and allowing for easy dispersal of sedimented metals, thereby improving the efficiency of metal recovery from both solid and liquid streams.
Implementation Method 1
a magnetic member situated exterior to the surface member, including a geometrically patterned array of magnets, the magnetic member being reversibly mounted in sufficient proximity to the surface member to produce a corresponding geometrically patterned magnetic field extending through the surface
Implementation Method 2
a plurality of magnetically susceptible particles, assembleable, under the influence of the geometrically patterned magnetic field, into a corresponding geometrically patterned array of riffles
Implementation Method 3
creating a plurality of regions of reduced flow for the sedimentation of metal particles from the liquid stream
Implementation Method 4
the particles are allowed to sediment out according to their specific gravities
Data Source
AI summary
A magnetic field system for producing an interruptible geometrically patterned magnetic field at a surface, including a surface member including a surface, a magnetic member situated exterior to the surface member, including a geometrically patterned array of magnets, the magnetic member being reversibly mounted in sufficient proximity to the surface member to produce a corresponding geometrically patterned magnetic field extending through the surface, the geometrically patterned array of magnets including magnets selected form the group consisting of permanent magnets, electromagnets, and a combination thereof, the geometrically patterned magnetic field being interruptible by the removal of the magnetic member to a location sufficiently distant from the surface member to withdraw the geometrically patterned magnetic field from the surface, or by the depowering of the powered electromagnets. A gravity separation system for separating and recovering metal particles from a liquid stream of suspended particles to be separated. A method for the gravity separation and recovery of metal particles from a liquid stream with a gravity recovery system.