Vertical Magnetic Separator Water-Free Particle Detachment
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Solution Overview
Problem
Current magnetic separation processes for iron ore, particularly those using vertically pulsating high-gradient magnetic separators (VPHGMS), face high water consumption due to the need for water jets to detach particles adhered to matrices by magnetic hysteresis, leading to increased costs and environmental impact.
Innovation Solution
A system is introduced for a VPHGMS that includes a demagnetizer, mechanical cleaning device, and compressed air jets to remove magnetized iron ore particles from magnetic matrices without using water, comprising a demagnetizer positioned above the collection tray, a mechanical cleaning device to scrape the matrices, and a compressed air jet-generating device to separate particles, allowing for efficient detachment without water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water jets are used to detach particles adhered to matrices by magnetic hysteresis, then particle detachment is achieved, but water consumption increases significantly
Solution Approach 1:
The patent replaces the hydraulic system (water jets) with a pneumatic system (compressed air jets) to detach particles from magnetic matrices. The compressed air jets are directed at the matrices to blow detached particles into collection trays, achieving the same detachment function without water consumption.
Solution Approach 2:
The patent uses compressed air (pneumatics) instead of water (hydraulics) to achieve particle detachment. The system includes compressed air supply lines connected to jet nozzles positioned to blow particles off the magnetic matrices during rotation, eliminating water usage while maintaining effective particle removal.
2Productivity
If water jets are used throughout the separation process, then particle detachment is maintained, but production costs and environmental impact increase
Solution Approach 1:
The patent substitutes water-based hydraulic systems with air-based pneumatic systems for particle detachment. This replacement eliminates water consumption and associated environmental issues such as wastewater generation, while maintaining effective particle separation through the use of compressed air jets directed at the rotating magnetic matrices.
3Stability of the object's composition
If demagnetizer is positioned after ore washing step, then particle agglomeration is reduced, but water is still required for separation
Solution Approach 1:
The patent combines the demagnetizer function with the particle detachment function by positioning the demagnetizer in the same operational sequence as the compressed air jet system. The demagnetizer reduces magnetic hysteresis effects on particles while the compressed air jets simultaneously detach particles from matrices, achieving both particle de-agglomeration and water-free separation in an integrated system.
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
This solution significantly reduces water consumption and associated costs and environmental impacts while maintaining separation efficiency, effectively addressing the limitations of existing technologies by facilitating the removal of magnetized particles from magnetic matrices without water.
Implementation Method 1
a demagnetizer (4) positioned above the first collecting tray (7) of at least one collecting tray (7, 8)... A first region (20) of alternating magnetic field will be created at a point in the trajectory of the separation ring (10) by means of the demagnetizer (4)
Implementation Method 2
a third region (22) in which jets of compressed air are applied to the separation ring (10)... at least one compressed air jet-generating device (6) positioned after the mechanical cleaning device (5) of the magnetic matrix
Implementation Method 3
a magnetic field-generating device adapted to generate a magnetic field in the region of the accumulation vessel
Implementation Method 4
even after the matrices leave the influence region of the magnetic field, the ore remains attached to the matrices due to the magnetic hysteresis force
Data Source
AI summary
A system for removing iron ore particles adhered by magnetic hysteresis to a magnetic matrix of a vertical magnetic separator, the vertical magnetic separator having a separation ring with a magnetic matrix; an ore feed inlet an ore accumulation vessel positioned in the lower portion of the magnetic matrix and having an outlet for low magnetic-susceptibility material; a magnetic field-generating device adapted to generate a magnetic field in the region of the accumulation vessel; at least one collection tray positioned internally to the magnetic matrix and adapted to collect material with greater magnetic susceptibility detached from the magnetic matrix; and a collecting container adapted to receive the material with greater magnetic susceptibility from at least one collecting tray. The system further includes a demagnetizer; a mechanical device for cleaning the magnetic matrix positioned at a position subsequent to the demagnetizer; and at least one device generating jets of compressed air.