Title of Invention

THREE-POINT BUS BAR FEEDING METHOD OF SMALL AMPERAGE ALUMINUM ELETROLYTIC CELLS AND BUS CONNECTION STRUCTURE THEREOF

Abstract

The present invention discloses a three-point bus bar feeding method of small amperage aluminum electrolytic cells, characterized it that electrixcal current flowing out from a cathode steel rod of a preceding aluminum electrolytic cell flows to cthode aluminum buses on both sides of an aluminum electrolytic cell, and in that the electrical current is divided into two portions bu the cathode alyminum bus and enters into an anode bus respectively from both ends of the alyminum eletrolytic cell. The present invention can effectively reduce magnetic field in the electrolytic cell. make the magnetic field in the whole cell evenly distributed with multiple peaks, relatively low valleys and a smaller gradient, and effectively solve the problem with magentic field of a small amperage pre-baked electrolytic cel. The present invention can allow the small amperage pre-baked electrolytic cell to obtain a reasonable distribution of magnetic field in the electrolytic cell and a stable velocity field of the melted flow so as to ensure stability and a higher current efficiency during production of the electrolytic cell.

Full Text

FORM 2 THE PATENTS ACT, 1970 (39 of 1970) COMPLETE SPECIFICATION (See Section 10; rule 13) TITLE THREE-POINT BUS BAR FEEDING METHOD OF SMALL AMPERAGE ALUMINUM ELETROLYTIC CELLS AND BUS CONNECTION STRUCTURE THEREOF APPLICANT CHINA ALUMINUM INTERNATIONAL ENGINEERINGCORPORATION LIMITED B-15/F., Tongtai Mansion, 33 Jinrong Street Xicheng District Beijing 100032 China Nationality : a Chinese corporation The following specification particularly describes the nature of this invention and the manner in which it is to be performed 14-MAR-2006 15:26 FROM TO 9-00914424621190 P.02/07 Three-point Bus Bar Feeding Method of Small Amperage Aluminum Electrolytic Cells and Bus Connection Structure thereof Technical Field The present invention relates to a bus bar feeding method of small amperage aluminum Electrolytic cells and a connection structure thereof Background Art At present as China exerts a more and more rigid environment requirements for aluminum electrolytic cells, a number of the currently ongoing small amperage aluminum electrolytic cells will not survive unless they are innovated. In the solutions to innovation of small amperage electrolytic cells, pre-baking of anode and strengthened electrical current are the most feasible option. However, if electrical current is still fed at two points at a single end of a small amperage aluminum electrolytic cell as usual, that is, electrical current flows along the direction of the anode bus into the electrolytic cell via the anode after being fed into the anode bus from a riser bus at one end, which will necessarily cause the current in the anode bus uneven at both ends. And the magnetic field generated by the electrical current will necessarily form a relatively large gradient in the length direction of the electrolytic cell, and the magnetic field, under the action of the horizontal electrical current, will cause the melted Sow in the electrolytic cell to bulge, fluctuate and even tilt under the action of the magnetic field force so that the electrolytic cell cannot form a regular and stable oven sides. In the meantime, velocity field formed by the melted flow in the electrolytic field under the action of the magnetic field force will become unstable. The instability in all the respects will necessarily cause much fluctuation of the electrolytic cell cause cell voltage swing and reduce efficiency, which brings about a great harm to production and management and a hard problem to innovation of small amperage aluminum electrolytic cells. What’s more, a desirable effect is hard to obtain even by taking the method of bus compensation which causes increase of bus used. 1 14-MAR-2006 15:27 FROM TO 9-00914424621190 P.03/07 An object of the present invention is to provide a three-point bus bar feeding method of small amperage aluminum Electrolytic cells and a connection structure thereof such that the electrical current enters the anode bus from both ends of the electrolytic cell, thereby thoroughly solving the problem of imbalance of magnetic filed inside the electrolytic cell due to feeding of electrical current at a single end. The present (invention is realized as follows: electrical current flowing out from a cathode steel rod of a preceding aluminum electrolytic cell flows to cathode aluminum buses on both sides of an aluminum electrolytic cell (1), the electrical current is divided into two portions by the cathode aluminum bus and enters into an anode bus (3) respectively from both ends of the aluminum electrolytic cell (1). The connection structure thereof is as follows; each end of the aluminum electrolytic cell (1) is provided with riser buses (2); one riser bus at one end and two riser buses at the other end; one end of the riser bus (2) is connected to the cathode aluminum bus and the other end is connected to the anode bus (3) in the aluminum electrolytic cell(1) As compared with the prior art, the present invention can effectively reduce magnetic field in the electrolytic cell, make the magnetic field in the whole cell evenly distributed with multiple peaks, relatively low valleys and a smaller gradient, and effectively solve the problem with magnetic field of a small amperage pre-baked electrolytic cell. The present invention can allow the small amperage pre-baked electrolytic cell to obtain a reasonable distribution of magnetic field in the electrolytic cell and a stable velocity field of the melted flow so as to ensure stability and a higher current efficiency during production of the electrolytic cell Practice proves that the present invention can obtain an optimal dynamic electromagnetic hydromechanic operation effect in the electrolytic cell, result in an even distribution of magnetic field in the whole cell, a stable flow of electrolyte and aluminum fluid layer and a suitable flow rate, and make concentration of alumina in the while cell even and uniform. The present invention creates a good prerequisite to ensure that small amperage aluminum electrolytic cells, after being innovated, can achieve high technological and 2 14-MAR-2006 15: 27 FROM TO 9-00914424621190 P.04/07 economic indexes. Brief Introduction of Drawings Fig. 1 is a perspective view of the present invention. Preferred Embodiments According to the embodiment of the present invention, electrical current flowing out from the cathode steel rod of the preceding aluminum electrolytic cell flows to cathode aluminum buses on both sides of the aluminum electrolytic cell (1), the electrical current is divided into two portions by the cathode aluminum bus: one portion flowing into a riser bus (2) at one end and the other portion flowing into two riser buses (2) at the other end of the electrolytic cell; the electrical current enters into an anode bus (3) respectively from both ends of the aluminum electrolytic cell(1)

Documents:

470-CHE-2006 CORRESPONDENCE OTHERS.pdf

470-CHE-2006 CORRESPONDENCE PO.pdf

470-CHE-2006 FORM-18.pdf

470-che-2006 abstract 25-08-2009.pdf

470-CHE-2006 AMANDED CLAIMS 25-02-2010.pdf

470-CHE-2006 AMANDED PAGE OF SPECIFICATION 25-02-2010.pdf

470-che-2006 claims 25-08-2009.pdf

470-CHE-2006 CORRESPONDENCE-OTHERS 25-02-2010.pdf

470-che-2006 correspondence-others.pdf

470-che-2006 description (complete) 25-08-2009.pdf

470-che-2006 drawings 25-08-2009.pdf

470-CHE-2006 EXAMINATION REPORT REPLY RECIEVED 25-08-2009.pdf

470-CHE-2006 FORM-1 25-02-2010.pdf

470-che-2006 form-1 25-08-2009.pdf

470-che-2006 form-3 25-08-2009.pdf

470-che-2006 form-5 25-08-2009.pdf

470-CHE-2006 OTHER DOCUMENT 25-08-2009.pdf

470-CHE-2006 OTHER PATENT DOCUMENT 19-10-2009.pdf

470-CHE-2006 POWER OF ATTORNEY 25-08-2009.pdf

470-che-2006- form 1.pdf

470-che-2006- form 3.pdf

470-che-2006- form 5.pdf

470-che-2006-abstract.pdf

470-che-2006-claim.pdf

470-che-2006-correspondence-others.pdf

470-che-2006-description(complete).pdf

470-che-2006-drawings.pdf