Magnetic Composite Particles for Targeted Inductive Heating
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Solution Overview
Problem
Current magnetic composite particles lack the capability for targeted heating using an alternating field, which is essential for specific applications such as selective magnetic heating and enhanced oil recovery.
Innovation Solution
Magnetic composite particles comprising ferromagnetic materials with a vitreous binder phase, designed to be spherical with a diameter between 0.2 to 20 mm, and a magnetic object size ratio of 1:10 to 1:5000, allowing for efficient inductive heating when exposed to an alternating magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If magnetic composite particles are used for separation applications, then they can absorb biological substances, but they lack the capability for targeted heating using alternating magnetic fields
Solution Approach 1:
The patent employs composite materials by combining ferromagnetic particles (providing magnetic responsiveness and heating capability) with a vitreous binder phase (providing structural stability and biocompatibility). This composite structure enables the particles to simultaneously achieve targeted heating through alternating magnetic fields while maintaining their separation functionality, thus resolving the contradiction between temperature control capability and application versatility
2Power
If the magnetic object size is increased to improve heating efficiency, then heating performance improves, but the ratio of magnetic object diameter to composite particle diameter becomes too large
Solution Approach 1:
The patent optimizes the size parameters by controlling the magnetic object diameter to be between 0.5 μm and 200 μm, and the composite particle diameter to be between 1 μm and 50 μm, maintaining a diameter ratio between 1:10 and 1:1000. This parameter optimization ensures sufficient heating efficiency while preserving the composite particle structure and manufacturability, resolving the contradiction between heating power and manufacturing precision
3Productivity
If the composite particle diameter is increased to improve flow properties in oil applications, then permeability increases, but the particles may settle too quickly in suspensions
Solution Approach 1:
The patent specifies composite particle diameters between 1 μm and 50 μm, particularly between 5 and 20 mm, optimizing the balance between flow properties and suspension stability. This size range provides sufficient permeability for oil flow enhancement while maintaining adequate suspension stability to prevent excessive settling, resolving the contradiction between productivity and sedimentation speed
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 particles achieve targeted heating, reducing viscosity and facilitating the separation or extraction of liquid fractions from geological formations, and can be reused, enhancing processes like oil well flow rates and cleaning particulate materials.
Implementation Method 1
designed to be spherical with a diameter between 0.2 to 20 mm or 0.3 to 50 mm, in particular between 5 and 20 mm... allowing for efficient inductive heating when exposed to an alternating magnetic field
Implementation Method 2
The invention relates to magnetic composite particles which comprise at least one magnetic object and a vitreous binder phase... allowing for efficient inductive heating when exposed to an alternating magnetic field
Implementation Method 3
Magnetic refers to materials that can be attracted by a magnet, i.e. for example ferromagnetic or superparamagnetic materials. Magnetic is also understood to mean materials which are referred to as soft magnetic materials, e.g. Ferrites
Data Source
AI summary
The invention relates to magnetic composite particles and to a method for the production thereof and to the use thereof. Such particles can be used as proppants and allow for deliberate heating by applying an alternating magnetic field.