Radiofrequency particle separator

Patent metadata

Field	Value
Publication number	US-9480991-B2
Application number	US-201213651102-A
Country	US
Kind code	B2
Filing date	Oct 12, 2012
Priority date	Oct 12, 2012
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

An apparatus for separating a mineral from a liquid including a housing and a fluid having a mineral bearing particle and contained within the housing. The apparatus further includes a generator configured to apply a radio-frequency electromagnetic field to the mineral bearing particle. The field produces a temperature increase within a portion of the mineral bearing particle and the mineral bearing particle transfers heat into the fluid, the heated fluid imposing motion-inducing forces on the particle.

First claim

What is claimed is:

1. An apparatus for separating a mineral from a liquid, comprising:
a housing;
a fluid comprising a liquid and including a mineral bearing particle, the fluid contained within the housing and defining a top surface;
a generator configured to apply a radio-frequency electromagnetic field to the mineral bearing particle, wherein the radio-frequency electromagnetic field produces a temperature increase within a portion of the mineral bearing particle and the mineral bearing particle transfers heat into the fluid, the heated fluid imposing motion-inducing forces on the mineral bearing particle; and
an accumulator positioned to separate the mineral bearing particle from the liquid, wherein the accumulator comprises a strainer configured to collect the mineral bearing particle through physical interaction therewith, the strainer disposed along the top surface of the liquid.

2. The apparatus of claim 1 , wherein the transferred heat from the mineral bearing particle into the fluid forms a thermal current that lifts the mineral bearing particle.

3. The apparatus of claim 1 , wherein the radio-frequency electromagnetic field includes a gradient and a field strength.

4. The apparatus of claim 1 , further comprising a controller configured to vary a heating characteristic by adjusting a parameter.

5. The apparatus of claim 4 , wherein the controller varies the heating characteristic based on a specified target unit size.

6. The apparatus of claim 4 , wherein the controller varies the heating characteristic based on a specified target unit density.

7. The apparatus of claim 1 , wherein the fluid comprises a dielectric fluid.

8. The apparatus of claim 1 , wherein the radio-frequency electromagnetic field increases the temperature of the mineral bearing particle contained within the fluid to at or above a boiling point of the fluid, producing a plurality of vapor bubbles.

9. The apparatus of claim 8 , wherein the mineral bearing particle transfers heat into the fluid uniformly.

10. The apparatus of claim 9 , wherein the temperature of the mineral bearing particle is increased within a region defined by an outer surface of the mineral bearing particle and extending inward to a specified skin depth.

11. The apparatus of claim 10 , wherein heat transferred from the mineral bearing particle boils the fluid, forming the plurality of vapor bubbles within the fluid at a formation rate.

12. The apparatus of claim 11 , wherein the formation rate is controlled to move mineral bearing particle within the fluid at a specified speed.

13. The apparatus of claim 10 , wherein the radio-frequency electromagnetic field includes a specified wave form.

14. The apparatus of claim 13 , wherein the specified wave form is a continuous field having a specified frequency and intensity.

15. The apparatus of claim 13 , wherein the specified wave form is a pulsed electromagnetic field.

16. The apparatus of claim 9 , wherein the temperature of the mineral bearing particle is increased homogeneously.

17. The apparatus of claim 16 , wherein the transferred heat from the mineral bearing particle boils the fluid forming the plurality of vapor bubbles within the fluid at a formation rate.

18. The apparatus of claim 8 , wherein the mineral bearing particle transfers heat into the fluid according to a specified temperature gradient.

19. The apparatus of claim 18 , wherein the transferred heat from the mineral bearing particle boils the fluid forming the plurality of vapor bubbles within the fluid at a formation rate.

20. The apparatus of claim 8 , further comprising a controller configured to vary a heating characteristic by adjusting a parameter.

21. The apparatus of claim 20 , wherein the controller varies the heating characteristic based on a specified target unit size.

22. The apparatus of claim 20 , wherein the controller varies the heating characteristic based on a specified target unit density.

23. The apparatus of claim 22 , wherein the heating characteristic is a size of the plurality of vapor bubbles.

24. The apparatus of claim 22 , wherein the heating characteristic is a formation rate of the plurality of vapor bubbles.

25. The apparatus of claim 1 , further comprising a surrounding fluid disposed adjacent to the fluid and a regulator configured to vary a condition of the surrounding fluid.

26. The apparatus of claim 25 , wherein the regulator comprises a case partially surrounding the fluid and a pressure controller.

27. The apparatus of claim 26 , the surrounding fluid having a pressure, wherein the pressure controller decreases the pressure of the surrounding fluid.

28. The apparatus of claim 1 , wherein the accumulator comprises a catch positioned to receive the mineral bearing particle collected by the strainer.

29. The apparatus of claim 28 , wherein the housing comprises a chute having a length, wherein the strainer comprises a fixed blade, and wherein the fixed blade is angularly offset relative to the length of the chute such that the mineral bearing particle moves along the fixed blade and into the catch.

30. An apparatus for separating a mineral bearing particle from a fluid, comprising:
a housing;
a fluid comprising a liquid and including a mineral bearing particle, the fluid contained within the housing and defining a top surface;
a generator configured to apply a non-uniform radio-frequency electromagnetic field to the mineral bearing particle, wherein the non-uniform radio-frequency electromagnetic field induces a propulsion force that moves the mineral bearing particle within the fluid; and
an accumulator positioned to separate the mineral bearing particle from the liquid, wherein the accumulator comprises a strainer configured to collect the mineral bearing particle through physical interaction therewith, the strainer disposed along the top surface of the liquid.

31. The apparatus of claim 30 , wherein the non-uniform radio-frequency electromagnetic field induces currents within the mineral bearing particle and force is applied to the mineral bearing particle due to interaction of the currents and a magnetic component of the non-uniform radio-frequency electromagnetic field.

32. The apparatus of claim 31 , wherein the propulsion force is generated by gradients in the force applied to the mineral bearing particle.

33. The apparatus of claim 30 , wherein the non-uniform radio-frequency electromagnetic field includes a specified wave form.

34. The apparatus of claim 33 , wherein the specified wave form comprises a continuous wave having a specified frequency and intensity.

35. The apparatus of claim 33 , wherein the specified wave form is a pulsed electromagnetic field.

36. The apparatus of claim 30 , wherein the accumulator comprises a catch positioned to receive the mineral bearing particle collected by the strainer.

37. The apparatus of claim 36 , wherein the housing comprises a chute having a length, wherein the strainer comprises a fixed blade, and wherein the fixed blade is angularly offset relative to the length of the chute such that the mineral bearing particle moves along the fixed blade and into the catch.

Assignees

• Elwha Llc

Inventors

• Baym Michael H
• Briggs Terry
• Gilbert Clark J
• Hillis W Daniel
• Hyde Roderick A
• Ishikawa Muriel Y
• Kare Jordin T
• Myhrvold Conor L
• Myhrvold Nathan P
• Pan Tony S
• Tegreene Clarence T
• Whitmer Charles
• Wood Jr Lowell L
• Wood Victoria Y H

Classifications

• B01D21/34

  Controlling the feed distribution; Controlling the liquid level {; Control of process parameters} · CPC title

• B01D21/009

  Heating or cooling mechanisms specially adapted for settling tanks · CPC title

• B01D21/0009

  Settling tanks making use of electricity or magnetism (electric ultra filters B01D61/425; filters making use of electricity or magnetism B01D35/06; magnetic or electrostatic separation B03C) · CPC title

• B03B1/04

  by additives · CPC title

• B03B1/02 Primary

  Preparatory heating · CPC title