MOLTEN METAL TRANSFER SYSTEM AND ROTOR
First Claim
1. A rotor for use in a tube for directing molten metal upward, the rotor comprising one or more rotor blades, wherein each rotor blade comprises:
- (a) a first portion having (i) a leading edge with a thickness of ⅛
″
or greater, (ii) a first upper surface angled to direct molten metal upwards, and (iii) a first bottom surface with an angle equal to or less than the angle of the first upper surface as measured from a vertical axis; and
(b) a second portion integrally formed with the first portion, the second portion having (i) a second upper surface angled to direct molten metal upwards, the angle of the second upper surface being greater than the angle of the first upper surface as measured from the vertical axis, and (ii) a second bottom surface, the second bottom surface having an angle greater than the angle of the first bottom surface as measured from the vertical axis.
1 Assignment
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Accused Products
Abstract
The invention relates to systems for transferring molten metal from one structure to another. Aspects of the invention include a transfer chamber constructed inside of or next to a vessel used to retain molten metal. The transfer chamber is in fluid communication with the vessel so molten metal from the vessel can enter the transfer chamber. A powered device, which may be inside of the transfer chamber, moves molten metal upward and out of the transfer chamber and preferably into a structure outside of the vessel, such as another vessel or a launder.
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Citations
68 Claims
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1. A rotor for use in a tube for directing molten metal upward, the rotor comprising one or more rotor blades, wherein each rotor blade comprises:
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(a) a first portion having (i) a leading edge with a thickness of ⅛
″
or greater, (ii) a first upper surface angled to direct molten metal upwards, and (iii) a first bottom surface with an angle equal to or less than the angle of the first upper surface as measured from a vertical axis; and(b) a second portion integrally formed with the first portion, the second portion having (i) a second upper surface angled to direct molten metal upwards, the angle of the second upper surface being greater than the angle of the first upper surface as measured from the vertical axis, and (ii) a second bottom surface, the second bottom surface having an angle greater than the angle of the first bottom surface as measured from the vertical axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 64)
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13. A system for transferring molten metal out of a vessel, the system comprising:
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(a) a vessel, the vessel having a cavity and including a transfer chamber having an opening in communication with the cavity, the transfer chamber including, an uptake section above the opening; (b) an outlet in communication with the uptake section and above the opening; and (c) a molten metal pump having a motor, a drive shaft connected to the pump and extending into the uptake section, the drive shaft connected to a rotor, wherein the rotor is configured to move molten metal upward into the uptake section, where it exits the outlet. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 47, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 59, 60, 62, 63, 65, 66)
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- 41. A vessel for use in a system for transferring molten metal, the vessel including a cavity, a transfer chamber with an opening in communication with the cavity, the transfer chamber having an uptake section above the opening, and an outlet above the opening, the outlet in communication with the uptake section.
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46. A method of forming a transfer well to a vessel for containing molten metal, the method comprising the steps of:
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(a) creating a form adjacent a side of the vessel, the form defining a transfer well having an outer wall, a top surface, a bottom surface, and a an opening in the top surface, and an internal cavity, the internal cavity having a chamber for holding molten metal, a restricted area above the chamber, an uptake section above the restricted area and in communication with the opening in the top surface, an outlet in communication with the uptake section; (b) placing refractory material in the form to create the transfer well, wherein the side other vessel adjacent the transfer well forms part of the outer wall of the transfer well; and (c) forming an opening near the bottom surface in the side of the vessel adjacent the transfer well.
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53. A transfer well system for use with a vessel including a cavity for containing molten metal, the transfer chamber system being in fluid communication with the vessel cavity and including:
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(a) an inlet in communication with the cavity to permit molten metal to enter the transfer chamber; (b) an enclosed inner section and an open section, the enclosed inner section having a first opening in communication with the open section; (c) a pump positioned in the transfer chamber, the pump having a motor, a drive shaft having a first end connected to the motor, and a second end, and a rotor connected to the second end, wherein the shaft is positioned at least partially in the enclosed inner section and the rotor is positioned at least partially in the enclosed inner section; (d) an outlet above the first opening and below the motor, wherein molten metal can exit the transfer chamber through the outlet; (e) wherein the rotor has a diameter, and the enclosed inner section has an interior diameter, and the interior diameter is between ⅛
″
to 1″
greater than the diameter of the rotor;wherein, as the pump operates the rotor is rotated and directs molten metal up into the enclosed inner section and out of the outlet.
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67. A method of forming a first structure for the transfer of molten metal from the first structure to a second structure, the method comprising the steps of:
- forming a transfer chamber in the first structure, the transfer chamber having an opening, an uptake section above the opening, and an outlet in communication with the uptake section and above the opening and leading out of the first structure;
wherein the transfer chamber includes a section at or above the opening, but below the outlet, configured to receive a molten metal pump rotor with between 1/32″ and
¼
″
of clearance along the entire circumference.
- forming a transfer chamber in the first structure, the transfer chamber having an opening, an uptake section above the opening, and an outlet in communication with the uptake section and above the opening and leading out of the first structure;
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68. A method of transferring molten metal from a first structure to a second structure, the method comprising the steps of:
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(a) providing a first structure having a transfer chamber in the first structure, the transfer chamber having an opening, an uptake section above the opening, and an outlet in communication with the uptake section and above the opening and leading out of the first structure;
wherein the transfer chamber includes a section at or above the opening, but below the outlet, configured to receive a molten metal pump rotor with between 1/32″ and
¼
″
of clearance along the entire circumference;(b) positioning a molten metal pump in the first structure, such that the rotor is positioned in the section; and (c) activating the pump to rotate the rotor, which moves molten metal up the uptake section and out of the outlet.
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Specification