Apparatuses and systems for vertical electrolysis cells

Patent metadata

Field	Value
Publication number	US-12091765-B2
Application number	US-202117556757-A
Country	US
Kind code	B2
Filing date	Dec 20, 2021
Priority date	Mar 30, 2016
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

In one embodiment, the disclosed subject matter relates to an electrolytic cell that has: a cell reservoir; a cathode support retained on a bottom of the cell reservoir, wherein the cathode support contacts at least one of: a metal pad and a molten electrolyte bath within the cell reservoir, wherein the cathode support includes: a body having a support bottom, which is configured to be in communication with the bottom of the electrolysis cell; and a support top, opposite the support bottom, having a cathode attachment area configured to retain a at least one cathode plate therein.

First claim

What is claimed is:

1. A method for producing aluminum, comprising:
(a) passing current between an anode and a cathode through an electrolytic bath of an electrolytic cell, the electrolytic cell comprising:
(i) a plurality of vertical anode plates,
(ii) a plurality of vertical cathode plates,
(iii) a cathode support located on and coupled to a carbon cathode block, wherein the cathode support is in contact with at least one plate of the plurality of vertical cathode plates,
(A) wherein the cathode support is a separate component from the carbon cathode block,
(B) wherein the cathode support comprises at least one cathode attachment configured to retain the at least one plate of the plurality of vertical cathode plates,
(C) wherein the at least one cathode attachment comprises at least one of:
(1) surface grooves on an upper surface of the cathode support, wherein the surface grooves are configured to directly contact and support the at least one plate of the plurality of vertical cathode plates,
(2) raised extended portions, wherein the raised extended portions are configured to support the at least one plate of the plurality of vertical cathode plates; and

(b) feeding a feed material into the electrolytic cell.

2. The method of claim 1 , further comprising (c) electrolytically reducing the feeding material into a metal product.

3. The method of claim 2 , further comprising: (d) draining the metal product from the plurality of vertical cathode plates to a bottom of the electrolytic cell to form a metal pad.

4. The method of claim 2 , wherein the metal product has a purity of P1020.

5. The method of claim 1 , wherein the electrolytic bath comprises at least one of NaF, AlF 3 , CaF2, MgF2, LiF, and KF.

6. The method of claim 1 , wherein the cathode support comprises at least one of titanium diboride-carbon composite material, titanium diboride, silicon carbide, boron nitride, silicon nitride, hafnium boride, hafnium boride-carbon composite material, zirconium diboride, zirconium diboride-carbon composite material, and carbonaceous materials.

7. The method of claim 1 , wherein the at least one plate of the plurality of vertical cathode plates is constructed of a transition metal boride compound.

8. The method of claim 7 , wherein the transition metal boride compound is titanium diboride.

9. The method of claim 1 , wherein the surface grooves comprise a sufficient depth to retain the plurality of vertical cathode plates.

10. The method of claim 1 , wherein the plurality of vertical cathode plates comprises at least one of a first cathode plate and a second cathode plate, wherein an edge of the first cathode plate touches an edge of the second cathode plate.

11. The method of claim 1 , wherein the at least one cathode attachment further comprises a plurality of pins.

12. The method of claim 11 , wherein the plurality of pins includes a first set of pins and a second set of pins.

13. The method of claim 11 , wherein pin bottoms of the plurality of pins are retained by corresponding openings in the cathode support.

14. The method of claim 13 , wherein the plurality of pins are positioned in a spaced relation from one another and wherein at least some of the plurality of pins support the at least one plate of the plurality of vertical cathode plates in a vertical configuration.

15. The method of claim 1 , wherein the carbon cathode block is fixedly coupled to a bottom of the electrolytic cell.

16. The method of claim 1 , wherein both the plurality of vertical anode plates and the plurality of vertical cathode plates are configured in an alternating parallel configuration.

17. The method of claim 1 , wherein the electrolytic cell further comprises an anode assembly for retaining at least one plate of the plurality of vertical anode plates.

18. The method of claim 1 , wherein the cathode support comprises carbonaceous materials.

19. The method of claim 1 , wherein the at least one plate of the plurality of vertical cathode plates is comprised of multiple cathode plates.

20. The method of claim 1 , wherein the raised extended portions define a rack.

Assignees

• Alcoa Usa Corp

Inventors

• Mosser Benjamin D
• Sworts Lance M

Classifications

• C25C7/005

  of cells for the electrolysis of melts (C25C7/02 - C25C7/06 take precedence) · CPC title

• C25C3/12

  Anodes · CPC title

• C25C3/10

  External supporting frames or structures · CPC title

• C04B35/64

  Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F}) · CPC title

• C04B35/58

  based on borides, nitrides, {i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides} or silicides {(containing free binder metal C22C29/00)} · CPC title