US20140363309A1 - Emergency molten metal pump out - Google Patents
Emergency molten metal pump out Download PDFInfo
- Publication number
- US20140363309A1 US20140363309A1 US14/294,858 US201414294858A US2014363309A1 US 20140363309 A1 US20140363309 A1 US 20140363309A1 US 201414294858 A US201414294858 A US 201414294858A US 2014363309 A1 US2014363309 A1 US 2014363309A1
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- Prior art keywords
- pump
- metal
- impeller
- base
- molten metal
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
- F04D7/065—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals for liquid metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
Definitions
- the present exemplary embodiment relates to a molten metal pump. It finds particular application as a pump suitable for emergency pump out situations, and will be described with particular reference thereto. However, it is to be appreciated that the present exemplary embodiment is also amenable to other like applications.
- Molten metals such as aluminum, brass, bronze and zinc are commonly used. Of course, to be placed in a molten state, the metal must be exposed to elevated temperatures.
- furnaces and other devices are used for this purpose, including smelting furnaces for aluminum production, induction furnaces for metal processing, and refractory furnaces for metal recycling. The following paragraphs describe several varied systems in which a molten metal exists.
- Hall-Heroult manufactures aluminum smelting pots consisting of a rectangular steel box insulated with fire bricks along the bottom and the sides. Carbon blocks containing conductor rods are attached to the bottom brick lining, with the rods protruding from the cell structure. The sides of the cell are lined with carbon on top of the firebricks. Square anode blocks constructed form compressed petroleum, coke and coal tar are fixed to rods and suspended from two beam-like bus-bars attached to the cell structure, which as well as supplying electric current can lower or raise the anode blocks.
- Alumina is provided to the cell through an ore bin located above the cell and a portable fume extraction hood covers the cell. Aluminum is derived from the added aluminum within the melting pots via an electrolytic process.
- induction furnaces employ electromagnetic energy to induce electrical currents within a charge of metal or metal alloy.
- the electrical resistance of the metal produces heat as a natural consequence of the induced currents flowing in the metal.
- the combination of applied electrical power and frequency can be chosen to induce sufficient heat within the metal to cause it to melt, providing a molten liquid which can be poured into molds or otherwise used to produce a wide variety of metal products.
- the basic elements of an induction furnace include an electromagnetic induction coil, a vessel having a lining of refractory material, and a support structure for the coil and vessel.
- metals may be melted in reverberatory furnaces.
- a reverberatory furnace direct flame and radiation from hot refractory linings heat the metal.
- a furnace is a steel box lined with alumina or other refractory brick having a flue at one end and a generally vertically lifting door at the other end closing a main entrance for the furnace through which a metal is directly charged into the furnace.
- the charge of molten metal may be introduced through the main entrance and lies in a shallow hearth having a relatively low roof so that flame passes across the surface of the charge.
- Conventional oil or gas burners are usually placed on either side of the furnace to heat the refractory lining and to melt the metal.
- the resulting molten metal is then transferred to a casting machine to produce metal ingot.
- the object In the hot-dip galvanizing of an object, for example of iron, steel etc., the object is immersed in a bath of molten zinc, the iron and zinc forming alloys with one another.
- the molten zinc is typically housed in a refractory container during this process.
- a refractory lined vessel designed to withstand the extreme temperatures associated with molten metals may be employed.
- the interior surface of the refractory lining that contacts the molten metal can become sintered and brittle because of the extreme temperatures to which it is exposed.
- the refractory expands and contracts in response to the heating and cooling cycles. Cracks form in the refractory, permitting small amounts of molten metal to migrate into the granular material. Failure can result in a dangerous situation where molten metal could escape containment.
- each system requires the introduction of energy (e.g. heat or electricity) to keep the metal in a molten state. If the heating system were to fail (or for example power to the system is lost), the molten metal could solidify and ruin the system.
- energy e.g. heat or electricity
- molten metal pumps already exist that can remove molten metal from vessels.
- the pumps are constructed of a refractory material.
- a refractory pump cannot be immersed in molten metal without a relatively lengthy pre-heating process. Accordingly, a traditional refractory pump is unsuitable for emergency pump-out situations.
- a molten metal pump comprised of a metal base defining a pumping chamber.
- the pump further includes a motor mount adapted to receive a motor, at least one metal post extending between the base and the motor mount, and a metal shaft disposed between the motor and an impeller disposed in the pumping chamber.
- a bearing ring engages the impeller.
- the pumping chamber will include an inlet and an outlet and a metal riser tube in fluid communication with the outlet is also provided.
- a method for emergency pump out of a molten metal from a vessel comprises identifying a condition precedent which requires rapid removal of the molten metal from the vessel, and then introducing a pump including at least a metal base, a metal post and a metal riser tube into the molten metal.
- a pump including at least a metal base, a metal post and a metal riser tube into the molten metal.
- the impeller By rotating a shaft and impeller combination with a motor, the impeller being disposed within the base and configured to direct molten metal into the riser tube, molten metal is transferred through the riser tube into a second vessel.
- the present pump constructed primarily from metal, does not require preheating and can be introduced into a molten metal even when the pump components are at a temperature below about 100° C.
- FIG. 1 is a perspective view of a molten metal pump
- FIG. 2 is a rear elevation view of the pump of FIG. 1 ;
- FIG. 3 is a side elevation view of the pump of FIG. 1 ;
- FIG. 4 is a top plan view of the pump of FIG. 1 ;
- FIGS. 5A , 5 B and 5 C are representative of the pump base of FIG. 1 in various phases of assembly ( FIG. 5A is fully exploded, FIG. 5B is partially exploded by part grouping, and FIG. 5C is assembled);
- FIG. 6 is a cross-sectional view of a pump base
- FIG. 7 is the molten metal pump of FIG. 1 including an outlet conduit adapter attached to the riser.
- a motor 111 is attached to a rotatable shaft 113 by a coupling assembly (not visible).
- the shaft 113 is attached at its lower end to a rotatable impeller 117 which rotates within a pumping chamber 118 defined by base 119 .
- a birdcage impeller of the type disclosed herein is suitable but alternative impeller embodiments are envisioned to work equally well.
- the impeller 117 and pumping chamber 118 are in fluid communication with an inlet 134 and an outlet 133 of the base 119 .
- the use of a graphite or ceramic (refractory materials) impeller can advantageously minimize thermal expansion issues.
- a first bearing ring pair 121 and a second bearing ring pair 122 are provided to allow proper rotation of the impeller 117 .
- the bearing rings advantageously prevent erosion so that flow can be maintained.
- the motor 111 is supported and connected to the base assembly 119 by a pair of posts 125 which are attached to a motor mount platform 129 via bolt assemblies 131 .
- a riser tube 132 has a first end disposed in fluid communication with the outlet 133 in the base 119 and is secured at a second end to the motor mount platform 129 via a coupling adaptor 137 .
- the shaft, posts and riser tube can be constructed of any high temperature resistant metal, such as stainless steel.
- the base assembly is comprised of steel plates 140 , 141 , 142 , 143 and 144 . Of course, it is envisioned that more or fewer than five plates can be used to assemble the base. Three plates is considered to be the most likely minimum number. Interposed between each of the plates is sealing gasket 145 , 146 , 147 and 148 which can be constructed of Graphoil.
- the plates can be constructed, for example, from 304, 316 and/or 330 stainless steel.
- Silicon carbide bearing rings particularly outer bearings 121 and 122 are seated within recesses in the base and are similarly surrounded by expansion gaskets (which can be constructed of FryeWrap XFP expanding paper from Unifrax Corporation) 150 , 151 , 152 and 153 , forming an interface between the silicon nitride bonded silicon carbide bearing ring and the adjacent metal surfaces on the outside edge and outer wall.
- expansion gaskets which can be constructed of FryeWrap XFP expanding paper from Unifrax Corporation
- the expanding gaskets keep bearing rings aligned notwithstanding dissimilar thermal expansion.
- sealing gaskets 154 and 155 seal the inside edge of the bearing rings.
- Shaft 113 is secured to the impeller 117 .
- graphite impeller 117 can be machined with a quadralobal extension 160 .
- Extension 160 can be shaped in the same manner as the shaft which is described in U.S. Pat. No. 5,634,770, herein incorporated by reference.
- the quadralobal mating allows for dissimilar thermal expansions and high torque transfer.
- a cap member 170 having a cooperatively formed internal surface for receiving the extension 160 is positioned there over.
- Metal cap 170 includes a threaded head end 171 suitable for receiving a cooperatively threaded end of shaft 113 .
- the male thread connection allows for field modification to the shaft.
- a bore 180 through impeller 117 is designed to receive a bolt 181 having a threaded end to receive nut 183 . Tightening of nut 183 draws impeller 117 and cap 170 into a mated relationship.
- a gasket material 190 (eg. Grafoil) can be positioned between the interface with shaft 113 and cap 170 . Furthermore, a gasket 193 can be provided at the interface between cap 170 and a surface of impeller 117 . A graphite plug 191 can be inserted into the bore 180 of the impeller 117 to seal the bolt 181 from exposure to molten metal.
- a gasket material 190 eg. Grafoil
- a gasket 193 can be provided at the interface between cap 170 and a surface of impeller 117 .
- a graphite plug 191 can be inserted into the bore 180 of the impeller 117 to seal the bolt 181 from exposure to molten metal.
- Plates 140 - 144 are equipped with aligned passages 200 designed to receive bolt and nut assemblies 201 suitable for simultaneously mating the plates 140 - 144 together to form base 119 and attaching posts 125 to the base 119 .
- Posts 125 can include cross members 210 which include alignment passages 211 (optionally with, bearing rings) serving as a guide for shaft 113 .
- the pump can generally be approximately at least 3 meters long and maintain its functional stability because of the steel superstructure.
- Plate 142 can include a plurality of tap holes 220 designed to receive screws 221 suitable for joining riser tube 132 to the base 119 adjacent outlet 133 .
- Hook elements 230 are secured to the motor mount 129 to facilitate the lifting of the pump assembly into the desired location.
- the present pump provides a suitable emergency pump out apparatus. More particularly, because thermal expansion mismatches are minimized via the pump design, no preheating is required. Accordingly, the pump can be immediately disposed within a body of molten metal when required.
- the pump is particularly advantageous because of its steel construction it can be readily disposed within molten aluminum and molten zinc (and other molten metals) whereas a traditional graphite pump requires a super structure above the furnace to keep the pump in place because of its comparatively high buoyancy.
- the pump may be at least 3 meters in length, in which case each of the shaft 113 , posts 125 and riser tube 132 will be at least 3 meters in length. Moreover, this length is anticipated to be sufficient to allow the base to be deployed adjacent a lower portion of the molten metal containment vessel, wherein molten metal is lifted via riser tube 132 above the height of a sidewall of the containment vessel. Of course, in certain situations, a taller system may be desired.
- the riser tube may have a length greater than the post/shaft elements.
- base 119 may be disposed on a bottom floor of the vessel being evaluated, it may be exposed to dross and other occlusions. Accordingly, in selected embodiments, it may be advantageous to provide a steel basket 249 (or screen) surrounding the inlet 134 . Moreover, the basket 249 can define a plurality of relatively smaller openings 251 that can discourage large dross pieces or inclusions from entering and damaging the pump (see FIG. 6 ).
Abstract
Description
- This application claims the benefit of U.S. Provisional Application 61/832,376, filed Jun. 7, 2013, the disclosure of which is herein incorporated by reference.
- The present exemplary embodiment relates to a molten metal pump. It finds particular application as a pump suitable for emergency pump out situations, and will be described with particular reference thereto. However, it is to be appreciated that the present exemplary embodiment is also amenable to other like applications.
- Molten metals such as aluminum, brass, bronze and zinc are commonly used. Of course, to be placed in a molten state, the metal must be exposed to elevated temperatures. A variety of types of furnaces and other devices are used for this purpose, including smelting furnaces for aluminum production, induction furnaces for metal processing, and refractory furnaces for metal recycling. The following paragraphs describe several varied systems in which a molten metal exists.
- For example, Hall-Heroult manufactures aluminum smelting pots consisting of a rectangular steel box insulated with fire bricks along the bottom and the sides. Carbon blocks containing conductor rods are attached to the bottom brick lining, with the rods protruding from the cell structure. The sides of the cell are lined with carbon on top of the firebricks. Square anode blocks constructed form compressed petroleum, coke and coal tar are fixed to rods and suspended from two beam-like bus-bars attached to the cell structure, which as well as supplying electric current can lower or raise the anode blocks. Alumina is provided to the cell through an ore bin located above the cell and a portable fume extraction hood covers the cell. Aluminum is derived from the added aluminum within the melting pots via an electrolytic process.
- As another example, induction furnaces employ electromagnetic energy to induce electrical currents within a charge of metal or metal alloy. The electrical resistance of the metal produces heat as a natural consequence of the induced currents flowing in the metal. The combination of applied electrical power and frequency can be chosen to induce sufficient heat within the metal to cause it to melt, providing a molten liquid which can be poured into molds or otherwise used to produce a wide variety of metal products. The basic elements of an induction furnace include an electromagnetic induction coil, a vessel having a lining of refractory material, and a support structure for the coil and vessel.
- As a further example, metals may be melted in reverberatory furnaces. In a reverberatory furnace direct flame and radiation from hot refractory linings heat the metal. At its simplest, such a furnace is a steel box lined with alumina or other refractory brick having a flue at one end and a generally vertically lifting door at the other end closing a main entrance for the furnace through which a metal is directly charged into the furnace. The charge of molten metal may be introduced through the main entrance and lies in a shallow hearth having a relatively low roof so that flame passes across the surface of the charge. Conventional oil or gas burners are usually placed on either side of the furnace to heat the refractory lining and to melt the metal. The resulting molten metal is then transferred to a casting machine to produce metal ingot.
- In the hot-dip galvanizing of an object, for example of iron, steel etc., the object is immersed in a bath of molten zinc, the iron and zinc forming alloys with one another. The molten zinc is typically housed in a refractory container during this process.
- Each of these systems—and equipment not mentioned herein—is capable of failure. For example, within each of these systems a refractory lined vessel designed to withstand the extreme temperatures associated with molten metals may be employed. In operation, the interior surface of the refractory lining that contacts the molten metal can become sintered and brittle because of the extreme temperatures to which it is exposed. As the device is used repeatedly, the refractory expands and contracts in response to the heating and cooling cycles. Cracks form in the refractory, permitting small amounts of molten metal to migrate into the granular material. Failure can result in a dangerous situation where molten metal could escape containment.
- Furthermore, each system requires the introduction of energy (e.g. heat or electricity) to keep the metal in a molten state. If the heating system were to fail (or for example power to the system is lost), the molten metal could solidify and ruin the system.
- Accordingly, a means for rapid pump-out of molten metal would be advantageous should one of the failure situations described above, or a similar situation, be encountered (condition precedent to emergency pump out).
- As those skilled in the art understand, molten metal pumps already exist that can remove molten metal from vessels. However, because of the high temperature environment in which these pumps operate, the pumps are constructed of a refractory material. Unfortunately, because of thermal expansion problems, a refractory pump cannot be immersed in molten metal without a relatively lengthy pre-heating process. Accordingly, a traditional refractory pump is unsuitable for emergency pump-out situations.
- Various details of the present disclosure are hereinafter summarized to provide a basic understanding. This summary is not an extensive overview of the disclosure and is neither intended to identify certain elements of the disclosure, nor to delineate scope thereof. Rather, the primary purpose of this summary is to present some concepts of the disclosure in a simplified form prior to the more detailed description that is presented hereinafter.
- In accordance with one aspect of the present exemplary embodiment, a molten metal pump comprised of a metal base defining a pumping chamber is provided. The pump further includes a motor mount adapted to receive a motor, at least one metal post extending between the base and the motor mount, and a metal shaft disposed between the motor and an impeller disposed in the pumping chamber. A bearing ring engages the impeller. The pumping chamber will include an inlet and an outlet and a metal riser tube in fluid communication with the outlet is also provided.
- According to a further exemplary embodiment, a method for emergency pump out of a molten metal from a vessel is provided. The method comprises identifying a condition precedent which requires rapid removal of the molten metal from the vessel, and then introducing a pump including at least a metal base, a metal post and a metal riser tube into the molten metal. By rotating a shaft and impeller combination with a motor, the impeller being disposed within the base and configured to direct molten metal into the riser tube, molten metal is transferred through the riser tube into a second vessel. The present pump, constructed primarily from metal, does not require preheating and can be introduced into a molten metal even when the pump components are at a temperature below about 100° C.
- The invention consists in the novel parts, construction, arrangements, combinations and improvements, shown and described. The accompanying drawings, which are incorporated in and constitute a part of the specification illustrate one embodiment of the invention and together with the description, serve to explain the principles of the invention.
-
FIG. 1 is a perspective view of a molten metal pump; -
FIG. 2 is a rear elevation view of the pump ofFIG. 1 ; -
FIG. 3 is a side elevation view of the pump ofFIG. 1 ; -
FIG. 4 is a top plan view of the pump ofFIG. 1 ; -
FIGS. 5A , 5B and 5C are representative of the pump base ofFIG. 1 in various phases of assembly (FIG. 5A is fully exploded,FIG. 5B is partially exploded by part grouping, andFIG. 5C is assembled); -
FIG. 6 is a cross-sectional view of a pump base; and -
FIG. 7 is the molten metal pump ofFIG. 1 including an outlet conduit adapter attached to the riser. - The exemplary embodiment has been described with reference to the preferred embodiments. Obviously, modifications and alterations will occur to others upon reading and understanding this description. It is intended that the exemplary embodiment be construed as including all such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
- Turning now to the molten metal pump as shown in the figures, a
motor 111 is attached to arotatable shaft 113 by a coupling assembly (not visible). Theshaft 113 is attached at its lower end to arotatable impeller 117 which rotates within apumping chamber 118 defined bybase 119. A birdcage impeller of the type disclosed herein is suitable but alternative impeller embodiments are envisioned to work equally well. Theimpeller 117 and pumpingchamber 118 are in fluid communication with aninlet 134 and anoutlet 133 of thebase 119. The use of a graphite or ceramic (refractory materials) impeller can advantageously minimize thermal expansion issues. - A first
bearing ring pair 121 and a secondbearing ring pair 122 are provided to allow proper rotation of theimpeller 117. The bearing rings advantageously prevent erosion so that flow can be maintained. Themotor 111 is supported and connected to thebase assembly 119 by a pair ofposts 125 which are attached to amotor mount platform 129 viabolt assemblies 131. - A
riser tube 132 has a first end disposed in fluid communication with theoutlet 133 in thebase 119 and is secured at a second end to themotor mount platform 129 via acoupling adaptor 137. The shaft, posts and riser tube can be constructed of any high temperature resistant metal, such as stainless steel. - The base assembly is comprised of
steel plates gasket outer bearings gaskets -
Shaft 113 is secured to theimpeller 117. Particularly,graphite impeller 117 can be machined with aquadralobal extension 160.Extension 160 can be shaped in the same manner as the shaft which is described in U.S. Pat. No. 5,634,770, herein incorporated by reference. Moreover, the quadralobal mating allows for dissimilar thermal expansions and high torque transfer. Acap member 170 having a cooperatively formed internal surface for receiving theextension 160 is positioned there over.Metal cap 170 includes a threadedhead end 171 suitable for receiving a cooperatively threaded end ofshaft 113. The male thread connection allows for field modification to the shaft. Abore 180 throughimpeller 117 is designed to receive abolt 181 having a threaded end to receivenut 183. Tightening ofnut 183 drawsimpeller 117 andcap 170 into a mated relationship. - A gasket material 190 (eg. Grafoil) can be positioned between the interface with
shaft 113 andcap 170. Furthermore, agasket 193 can be provided at the interface betweencap 170 and a surface ofimpeller 117. Agraphite plug 191 can be inserted into thebore 180 of theimpeller 117 to seal thebolt 181 from exposure to molten metal. - Plates 140-144 are equipped with aligned
passages 200 designed to receive bolt andnut assemblies 201 suitable for simultaneously mating the plates 140-144 together to formbase 119 and attachingposts 125 to thebase 119.Posts 125 can includecross members 210 which include alignment passages 211 (optionally with, bearing rings) serving as a guide forshaft 113. The pump can generally be approximately at least 3 meters long and maintain its functional stability because of the steel superstructure. -
Plate 142 can include a plurality of tap holes 220 designed to receivescrews 221 suitable for joiningriser tube 132 to the base 119adjacent outlet 133.Hook elements 230 are secured to themotor mount 129 to facilitate the lifting of the pump assembly into the desired location. - The present pump provides a suitable emergency pump out apparatus. More particularly, because thermal expansion mismatches are minimized via the pump design, no preheating is required. Accordingly, the pump can be immediately disposed within a body of molten metal when required. The pump is particularly advantageous because of its steel construction it can be readily disposed within molten aluminum and molten zinc (and other molten metals) whereas a traditional graphite pump requires a super structure above the furnace to keep the pump in place because of its comparatively high buoyancy.
- As articulated above, it may be desirable for the pump to be at least 3 meters in length, in which case each of the
shaft 113,posts 125 andriser tube 132 will be at least 3 meters in length. Moreover, this length is anticipated to be sufficient to allow the base to be deployed adjacent a lower portion of the molten metal containment vessel, wherein molten metal is lifted viariser tube 132 above the height of a sidewall of the containment vessel. Of course, in certain situations, a taller system may be desired. - Furthermore, in certain environments, it may be desirable for the riser tube to have a length greater than the post/shaft elements. For example, with reference to
FIG. 7 , it may be desirable to provide theriser tube 132 withheight extending conduits outlet conduit 235. This allows safe discharge into a holding unit. - As noted previously, since
base 119 may be disposed on a bottom floor of the vessel being evaluated, it may be exposed to dross and other occlusions. Accordingly, in selected embodiments, it may be advantageous to provide a steel basket 249 (or screen) surrounding theinlet 134. Moreover, thebasket 249 can define a plurality of relativelysmaller openings 251 that can discourage large dross pieces or inclusions from entering and damaging the pump (seeFIG. 6 ). - The exemplary embodiment has been described with reference to the preferred embodiments. Obviously, modifications and alterations will occur to others upon reading and understanding the preceding detailed description. It is intended that the exemplary embodiment be construed as including all such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (20)
Priority Applications (2)
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US14/294,858 US20140363309A1 (en) | 2013-06-07 | 2014-06-03 | Emergency molten metal pump out |
US17/157,625 US20210148374A1 (en) | 2013-06-07 | 2021-01-25 | Emergency molten metal pump out |
Applications Claiming Priority (2)
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US201361832376P | 2013-06-07 | 2013-06-07 | |
US14/294,858 US20140363309A1 (en) | 2013-06-07 | 2014-06-03 | Emergency molten metal pump out |
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US17/157,625 Continuation US20210148374A1 (en) | 2013-06-07 | 2021-01-25 | Emergency molten metal pump out |
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US20140363309A1 true US20140363309A1 (en) | 2014-12-11 |
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US14/294,858 Abandoned US20140363309A1 (en) | 2013-06-07 | 2014-06-03 | Emergency molten metal pump out |
US17/157,625 Pending US20210148374A1 (en) | 2013-06-07 | 2021-01-25 | Emergency molten metal pump out |
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US17/157,625 Pending US20210148374A1 (en) | 2013-06-07 | 2021-01-25 | Emergency molten metal pump out |
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US9011761B2 (en) | 2013-03-14 | 2015-04-21 | Paul V. Cooper | Ladle with transfer conduit |
US9017597B2 (en) | 2007-06-21 | 2015-04-28 | Paul V. Cooper | Transferring molten metal using non-gravity assist launder |
US9034244B2 (en) | 2002-07-12 | 2015-05-19 | Paul V. Cooper | Gas-transfer foot |
US20150184316A1 (en) * | 2013-12-26 | 2015-07-02 | Sharon Wagner | Process and equipment for the production of micro-carbonfibers |
US9080577B2 (en) | 2009-08-07 | 2015-07-14 | Paul V. Cooper | Shaft and post tensioning device |
US9108244B2 (en) | 2009-09-09 | 2015-08-18 | Paul V. Cooper | Immersion heater for molten metal |
US9156087B2 (en) | 2007-06-21 | 2015-10-13 | Molten Metal Equipment Innovations, Llc | Molten metal transfer system and rotor |
US9205490B2 (en) | 2007-06-21 | 2015-12-08 | Molten Metal Equipment Innovations, Llc | Transfer well system and method for making same |
US9328615B2 (en) | 2009-08-07 | 2016-05-03 | Molten Metal Equipment Innovations, Llc | Rotary degassers and components therefor |
US9382599B2 (en) | 2009-08-07 | 2016-07-05 | Molten Metal Equipment Innovations, Llc | Rotary degasser and rotor therefor |
US9409232B2 (en) | 2007-06-21 | 2016-08-09 | Molten Metal Equipment Innovations, Llc | Molten metal transfer vessel and method of construction |
US9410744B2 (en) | 2010-05-12 | 2016-08-09 | Molten Metal Equipment Innovations, Llc | Vessel transfer insert and system |
US9643247B2 (en) | 2007-06-21 | 2017-05-09 | Molten Metal Equipment Innovations, Llc | Molten metal transfer and degassing system |
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EP3655658B1 (en) * | 2017-07-20 | 2022-03-23 | Pyrotek, Inc. | Mold pump engagement apparatus and a method of filling a mold |
CN108240328A (en) * | 2017-12-29 | 2018-07-03 | 菲格瑞特(苏州)汽车科技有限公司 | It is a kind of to be used to extract aluminium alloy and the pump and its manufacturing method of zinc alloy melt |
CN108916058A (en) * | 2018-07-18 | 2018-11-30 | 马鞍山马钢表面工程技术有限公司 | A kind of quick change zinc liquid pump slag-draining device |
CN109973395B (en) * | 2019-04-11 | 2021-02-02 | 江苏江大流体技术有限公司 | Ultra-high temperature metal solution delivery pump |
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Also Published As
Publication number | Publication date |
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US20210148374A1 (en) | 2021-05-20 |
AU2014203104B2 (en) | 2018-07-19 |
EP2811166A1 (en) | 2014-12-10 |
EP2811166B1 (en) | 2018-08-15 |
AU2014203104A1 (en) | 2015-01-15 |
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