JPS59500008A - Method and apparatus for submerging, conveying, melting and circulating metal charges in a molten medium - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Method and apparatus for melting and circulating Technical field This invention provides a method for submerging, transporting, melting and recycling metal charges in a melting medium. This invention relates to an improved method and apparatus for.

Background technology Scrap aluminum has a large surface area-to-volume ratio. The chips become suspended on the surface of the molten aluminum. Scraps that resist settling The presence of aluminum pipes causes major and minor inconveniences in aluminum reprocessing equipment. aluminum The fact that mass production is not limited to primary resources is essential to improving methods of recycling materials. A recycler that pumps molten aluminum through the heating and melt phase of the recycler. The processing equipment, which is thick and has an inconvenient shape compared to the raw processing equipment, is not effective. It is seen that the placement situation should be easy to attract. Specially shaped surrounding the pump impeller A collapsed wall or a volume where scrap is sent to the pump together with molten metal. A pump precisely made to cooperate with a full-forming wall? Although it is made of fireproof material, it is It is said that there is always a risk. The walls surrounding and housing the pump are made of fireproof material. I can't believe it. This(,2) The production, formation and maintenance of such walls can be quite expensive. Regarding management, playback The factory environment in which the This is the case. Loading the processing equipment and subsequent cleaning can cause damage to the walls. This damage Replacement is particularly expensive when precisely constructed walls are involved in the area of the pump.

The construction and just-described replacements are expensive, making some refurbishments ineffective due to cost. Provide convenient guidance.

Contains non-aluminum scrap such as steel in the scrap charged to the processing equipment. When there is a ready inclusion, there is no unusual occurrence of pump clogging problems. non-aluminum The aluminum scrap is attached to the pump impeller, and the cooperating wall that surrounds this entire pump impeller. The impeller will be stopped in time. When such impeller stoppage occurs, , walls and pump impellers are often damaged, with pump impellers of the type just described. An example of how technology has advanced in the design of perimeter walls is Pan Linden's US special. No. 3,977, E J A No. t, l co Jll/Evening No., Claxton, etc. No. 3.9g'l, 23Q. These patents The problem of submerging scrap that essentially does not self-sink is being handled in an acknowledged manner. Change These patents recognize and treat the skim that appears on the surface of molten aluminum. I'm trying to understand. Eliminates skim and dross in aluminum melting process The molding process is mainly done using aluminum oxide special table 1985-500008 (3 ) Due to the highly reactive properties of aluminum and the presence of high-temperature molten metal, the skim Particularly inconvenient problems due to the rapid formation of an atmosphere that emphasizes be. The pump impellers in each of the above-mentioned U.S. patents either enhance pumping action or Pump impeller designed to guide molten aluminum transporting scrap to the pump placed close to a wall that cooperates with the Pump impeller also considered in the above patent Problems such as skimming were unavoidable if the pipes were clogged. This is especially true for aluminum A piece of non-melting material, such as a refractory material with a specific gravity, flows into the molten metal. The blockage actually occurs when it is delivered to the pump section of the processing equipment.

In particular, this invention sinks aluminum scrap consisting of pieces that cannot self-sink. It concerns a method and apparatus for crushing, conveying, melting, and circulating. this invention The melting equipment of The action of a submerged molten metal scrap conveyor causes a flow below the surface of the molten metal. Feed of scrap into an open tank with heated molten metal drawn from the entry point It has the means to guide

The circulator continuously draws heated molten metal, including scrap, into the circulator. , where the scrap is completely carried into the molten metal and placed in the molten metal circulation path. The recirculated material is sent to the circulatory system, where it is then heated and melted (Hiro). Dispense scrap metal that is carried into the molten metal to be melted.

The present invention, which will be fully described below, overcomes the need for walls proximate to the impeller in the prior art. completely eliminates the risk of scraping into molten metal with a simultaneous reduction in skim formation. Wrap transport is also provided at the same time.

Therefore, the main object of this invention is to An inexpensive method and equipment for sinking, transporting, melting and circulating minium scrap. The aim is to provide a

Another object of this invention is to draw non-self-sedimenting scrap into molten metal and melt it. A molten metal circulator is provided which cooperates with the molten metal medium in such a manner that the molten metal medium is in contact with the molten metal medium.

Another object of the invention is to co-operate the molten metal medium with a vertically disposed wall; A molten metal medium with fluid flow paths for moving molten metal throughout the melting apparatus. To provide a melting surface with a melting metal circulator forming a fluid flow path in the Ru.

Yet another object of the invention is to provide fl and and to provide a melting and metal-saving holding tank.

Other objects and advantages of the invention are detailed below with reference to the illustrated drawings. Let's find out from.

Figure 1 is a schematic diagram of a recirculating scrap melting device that implements this invention, and Figure 2 is a schematic diagram of the recirculating scrap melting equipment that implements this invention. A plan view of the melting apparatus in the preferred embodiment of the invention, FIG. 3 is taken along the line 3-3 of FIG. Figure 4 is a cross-sectional view taken along the <c-lI line in Figure 1, Figure 5 is a cross-sectional view of molten metal. FIG. 6 is a perspective view of the scrap conveying circulator, and FIG. 6 is a sectional view taken along line 6-6 in FIG. Figure 7 is a plan view of the furnace, maintenance tank, and molten medium circulation device in which this invention is implemented, and Figure g. is a cross-sectional view taken along line tr in FIG. 7, and FIG. 9 is a cross-sectional view taken along line 9-94 in FIG. It is.

Referring now to FIG. 1, this figure shows the invention't + recirculating scrap melting process. The apparatus is shown in block diagram form. This recirculating scrap melting equipment is closed @separate heat tank It has 1/2 f and an open tank/2 f. Scrap and flux are introduced into open tank 12. be done. Scrap conveyance @ financing provided in the open tank 12 and described in detail later The metal and shield vessels are melted in the open tank lλ as shown by arrow 13 from the closed heating sty. Make it a shield ring for molten metal.

The molten metal is then deposited in a closed heating tank 12 as indicated by arrow /4'. . The scrap and flux are led to one end of the open tank 12 as shown by arrow /6. The skim or gold waste is placed in the opposite direction of open tank/2 as shown by arrow 17. removed from the edge. The principal product of the recirculating scrap melter is indicated by arrow 15. It is #molten aluminum without skim released from open chain heating st/ as shown in .

(6) Referring now to Figures U and 3, these figures show details of a preferred embodiment of the invention. A plan view and a front view are shown.

The following description will simultaneously describe the melting apparatus of FIGS. 2 and 3. Figure 2 shows 1-1 chain addition. A thermal bath /, / and an open bath 12 are shown. Closed heating tank // and its detailed structure are covered It is common that the ig is provided in a closed heating tank. Closed heating tank // and open tank 12 is made up of 117 human resources. As shown in Figure 3, refractory materials are metal coated. Covered by /9. Metal coating /q is heat-resistant steel. A pair of burnayu 1. ．． 2/ a is shown facing downward in the heating tank //. Properties and operation of burner, 2/, 21a The use is the same as the burners used today by those skilled in the art. Only two burners are shown It is shown. The location and number of burners depend on the nature of the fuel used in the combustion process and the useful It should be understood that this is a design matter based on the type of burner. closure The heat bath// and the open bath 7.2 are shown to be constructed of molten metal material No. 0 and are recommended. In the preferred embodiment, the molten metal is aluminum.

The open tank 1 is equipped with a wall section made of fireproof material, and this wall section 2 is closed. It is integrally connected to a partition wall 3 extending in the longitudinal direction of the chain heating tank/l and the open tank l. Ru. The open tank 12 has a @ wall, 24I and a front wall core. Closed heating tank // is rear wall It has λgf.

The partition wall λ3 has two openings: 1. q, has 31. 1N Front Exit Q 59-50 0008 (4) The position of the wall 23 and the open loco 9, 3/ of the recirculating scrap melting device It is important to the operation and method that this invention encompasses.

The molten metal scrap conveying circulator 32 is connected to the motor 3 da by a drive shaft 33 . The motor 3 can be an electric motor with selectable speed or any other suitable motor. .

It can be seen that the 3 circulators are installed in the middle between the wall unit 6 and the end wall unit 6. . The opening 31 is also located above the circulator 32 and below the surface 35 of the molten metal medium θ. It is provided at a point midway between the wall part here and the end wall 2B. 3 circulatory systems and 31 openings The relative positions of the wall portions and walls are as shown for optimum implementation of the method of the present invention. conduct. Three circulators driven by a motor, 7-hiro, create a fluid flow path for molten metal. . This molten metal flow path, indicated only by an arrow, draws molten metal through the entire opening 31; The molten metal passes through the fully open tank 7.2 and then circulates through the open lot to the closed heating tank/ Return to l. Although not shown in the drawing, the surface of the molten metal inside the closed heating tank // It would be understandable if most of it was skim. Of course, the surface of the molten metal in the closed heating tank 11 There is a very thin layer of oxide on the surface. All of the closed heating tank//and open tank 12 The wall is a simple straight vertical wall that is easily and inexpensively made of fireproof material. One thing should be noted. To the term cheap, the worst wall available today is noted earlier. This is a relative term considering all types of scrap recirculation equipment. Ru. Bath molten metal scrap transport circulation (g) The dynamic operation of the rotator 32 will be explained in detail below. Opening 29#-i of partition wall 3, bottom The sides are placed at the same height as the floor 36 of the closed heating tank// and the open tank.

The position of the opening λ9 is an open tank where the scrap 37, which is large and easily sinks, is located! bottom of 2 It sinks into the water and is alive due to the three circulatory systems. Practically speaking, scrap metal sinks to the bottom. Most of the liquid is melted in the bath at this stationary position.

In Fig. 3, scrap 37 is transferred to an open tank 1 at one end by conveyors 3g and 39. ．． It can be easily seen that II/ is supplied. Conveyor as already noted 3g soil scraps are large and sink by themselves due to their weight and shape. It is.

However, the conveyor 39 is used for scrap 1I, which has a large ratio of surface area to volume. tf transport, which cannot sink by itself. segmented aluminum Cans, whole cans, and small pieces collected during the manufacturing process are typical non-self-sinking wastes. It's crap.

Scrap that cannot self-sink to be placed in the molten metal 2θ The surface tension of the 400 layer of skim formed on top must be overcome.

The scrap that cannot self-sink is a gentle sinus produced by the three circulatory systems. It is fed to the camphor shown in I2. Violent vortices create a stream that does not self-sink into the molten metal. When you pull Clap in, the people around you will also be drawn into the cave, creating a very inconvenient side spirit. thing? Should be avoided to greatly encourage the formation of eggplant skims. Calm Vortex a, 2 Self-sinking in cooperation with the molten metal drawn in through the Vi opening 31 The scrap 4/i is made to sink into the molten metal θ. Circulatory system 32 explained The scrap 'J/ is completely carried into the molten metal 2θ by the dynamic action of Scrap begins to melt. The 3 units of the circulatory system were melted together with the scrap that was brought in. Supplies molten metal to all fluid channels. The scrap is then transferred to a flow path passing through an open tank/2. The circulating molten medium is melted by the heat extracted from the molten metal medium in subsequent baths. become part of.

The closed heating tank it has an opening 30 in the rear wall through which skim free of molten aluminum is discharged. It has 2g. In FIG. 3, the opening 30 in the rear wall is located in the closed heating tank ll. At a point below the surface of the bath molten metal λθ to prevent the skim from entering the final molten metal 15. I can understand the location. The final molten metal 15 is sent to an open tank as a solid scrubber. Through the specially formed opening 30, a quantity commensurate with the supply of the liquid! ;? 1m heating flows out from the tank/l.

The removal of skim and the supply of fluffing agent to the bath melter can be understood by the invention in Figure 3. Ru. The flux feeder qlI applies the flux agent to a gentle dog as shown in the diagram. It is illustrated to be helpful.

The skim can be removed by providing an inclined apex, 2A'i, on the top of the end wall 21. This is done as shown in FIG. Molten metal θ where skimda O is formed and moves removed manually or by an automatic device not shown. It is constructed on a sloped top surface 2 so that it can be removed easily.

To explain Fig. 4, the same reference numerals used in Figs. 1 and 3 indicate the same parts. It is used to make things worse.

The molten metal scrap conveying circulator 32 is connected to the molten metal completely closed heating tank ii to the opening 3. 1. The molten metal is circulated through 20 so that it is drawn into the central part O of the circulator 32. The annulus 32 is shown in cross section to facilitate explanation of the dynamic action. There is. The fluid flow path of molten metal from the closed heating tank/l is indicated by the dotted arrow! ;/,! ; at 2 shown.

Self-submerging scrap 4' shown entering a gentle vortex from above / is caught in the reflux and sucked into the opening at θ from the center of the circulator 3.2, where it The scrap is drawn completely into the moving molten metal. @ Ring device 32 is disconnected. A vane 33 connected at its inner end to a frusto-conical boss l17 shown in plan view. ! ; 'If you have. The scrap ql drawn into the molten metal is transferred to the vane 3. To S da Therefore, it is pushed outward. Details of the three at ring devices and their special operations VI Chapter S, 6 This will be fully explained in the description of the figures.

I will now explain Figure S, which shows a three-dimensional diagram of the molten metal scrap transport circulator 32. Good morning. The circulator 32 is constructed of refractory material and using conventional techniques. The circulatory system 32 , has what can be called a bottom plate 5 and a top plate 'iI-. Bottom plate l/ , S and the top plate 6 are separated from each other as shown in the figure, and a plurality of radiators are integrally fixed. Feathers extending in the direction! ;3. ! r’l,! left,! ;J! ;'7. has Kg .

A truncated conical boss lI? is integrally fixed to the center of the bottom plate IIs. truncated circle A drive shaft 33 is fixed to the boss q7 of the conical boss 7 by means not shown. . The height of the boss lI7 is lower than the distance between the bottom plate lIs and the top plate Dao. Feather! ;3 ．． ! 'I,! ! r, evening A,! r7. ! ;g is the truncated radial inner end shown; The boss is located at a point on the outer surface of the boss q7 between the bottom plate 4'5 and the top plate qB of the conical boss q7. It is integrally fixed to l17. Feather sJ, s41, 5B5b.

The radially extending edges of the bottoms of st and rg are attached to the bottom plate S, and the blades 3. s Da! ;! ;、! ;A,! 'I,! ! The outer end of : is fixed to the top plate 6 as shown in the figure. be done. The top plate 'IA has a circular opening qg2 in the center, and this opening qg It is coaxial with the axis of the shaft 33. The inner diameter of this central opening lIg is truncated conical. It is important for the operation of the circulatory system 32 that the diameter be larger than the outer diameter of the base of the boss lI7. .

A vane that cooperates with the truncated conical boss and the bottom plate/IS and the top plate! ;3. ! ;II,! ! T,! t, 37. ! ;g(D downwardly sloping side!;9.AO,A I, 12. Otsu 3 and 6q are wide suction parts (indicated by dotted lines) that extend above and around the circulatory system 3 units. act so as to cause The special fluid flow indicated by arrow A1 is explained first. As shown in the figure, the molten metal supplied from the closed heating tank/I becomes self-sinking scrap. Together they are drawn into the circulator 32, where the scrap is completely suctioned and processed as described above. Solid open tank/, 20 forced outwards towards the surrounding wall.

Returning to FIG. 2, by clockwise rotation of the circulator 3:l, the wall portion, the side 7/ of the 2- , partition wall 3, end 26, arrow 6 left, 6 to cause pressure build-up against the front wall. Otsu.

6ri, 1. As is clear from G, A and 70, there is a flow outward in the radial direction. can be done. This pressure is only released from the wall portions, the two ends 72 and the front wall 17. This is done through an opening formed between them. Scrap transported through open tank 12f and molten metal, and then the newly molten three-clap and barrel molten metal set. Molten metal full opening 2 based on alignment? and a closed heating tank// to the opening 31. This constant release of pressure achieves a strong fluid reflux through which the molten metal medium flows. be done. At the opening 31, the circulator 3 draws molten metal into the circulator 3. Allow the cycle to start again. The circulatory system 32 is separated from the wall surrounding the three circulatory systems. to prevent large pieces of insoluble scrap from becoming stuck between the circulator 32 and the wall. It is important to note that we are preventing This type of blockage causes the circulatory system 32 - and damage to the walls are therefore removed.

Referring to FIG. 6, which shows a cross section of the three circulators in FIG. S, a description will be given below. Be warned first/Tama In some cases, insoluble scrap or pieces of refractory material become mixed into the molten metal medium and are removed from the melting equipment. There is a possibility that the metal may come into contact with any device installed to allow the flow of gold. In Figure 6 of Ruu, the central part! An object 73 is shown stuck in the aperture.

Removing the object 73 is a simple matter and removes the circulator 3 from the molten metal after the motor has been shut down. 2 is temporarily lifted and the entire object 73 is removed using scissors. This kind of difference For example, if an object hits the top plate without entering the central opening, the object is in the circulatory system 3. The circulatory system falls near the 3rd wall as it hits the wall. The cycle shown in Figure 6 is broken. It is noted that the three vessels have a groove 97a formed in the bottom plate lI5 as shown in the figure. . This groove part a is due to the difference in the hardening rate of the refractory castings of different cross sections of the circulator 3.2. Prevents cracking.

The cross section of FIG. 6 shows flow paths 7#a, riqb, and molten metal medium flowing through all three circulatory units. llc is specified.

FIG. 7 shows a top view of the furnace, maintenance tank, and molten medium circulation device in which this invention is fully implemented. I'll explain it now that I'm here. Molten 7 The relationship between the molten metal, that is, the medium, and the circulatory system, and the We have previously explained how the circulatory system works properly to melt the liquid. ing. 7th. Figures g and 9 illustrate this development so that the invention finds utility in a complete device. Another feature of Ming is shown in detail.

In particular, the closed heating tank 7s and maintenance tank g5 are shown. Heating tank 7S and maintenance tank g! ;Id:, front wall 6, rear wall 77, cover 7g, first end wall 7' and second end wall It is made up of one t' chamber formed by gθ and the floor ty. cover 7 g is not shown in FIG. The partition wall g2 connects the heated portion of the heating tank 7S to the maintenance tank g. It is separated from the maintenance part of 5. The partition g-yu connects the heating tank 7S and the maintenance tank gs. A large number of passages gJ are provided to pass through.

It has 1, ff&, and 7.

As clearly shown in FIG. 7, passage g, 3. In III, the melting medium is maintained from the heating tank 7S. It is allowed to flow freely into tank gs. As shown in Figure 7.1, the passage g ba.

tt, g are oil or gas on the surface of the bath melting medium from the left side of the heating tank to the maintenance tank g5. The combustion gas from the gas processors gg and gq is allowed to flow freely. Burning Or flue gas is exhausted through the entire chimney ql as it is called.

The heating tank 7S is provided with a purification inclined part q2, and a guillotine-shaped door q3 is provided at the upper end. There is a closed body. The maintenance tank gs has a purification slope part 9q and a guillotine type nqS.

The front wall 76 contains a melting medium which is circulated by a schematically illustrated melting medium circulator 9g. There is an opening 96°7 through which the body flows. The circulator 9g is installed in the open tank 100. Ru. The open tank tOθ has an inclined part 10 for scooping and a wall io2 as shown in the figure. have.

An inlet IO for molten metal or media is provided as shown in FIG. Re rule t07. Supported by tOt, the fc bath train lle& is melted in the next process. The injection port 10r is located between the heating tank and the molten metal. Inlet ports/θ de around the periphery of the tank and maintenance tank are provided as shown in the figure.

Container/10. ///, //ko are carried by rails / /3, / /41 .

When the guillotine-shaped door q3 is opened, the opening q2.

9rit passage g3. This means that gll, l: A, g7ff can be easily accessed. This is important as the position of the guillotine-shaped door q3 in the invention.

In the above description, the melting device and the method of operating the melting device of the present invention are different from conventionally effective methods. It is very clear that a clear improvement can be made more easily and cheaply than before. It is clear.

Although one embodiment of this invention has been illustrated and described, it departs from the spirit and scope of this invention. It will be apparent to those skilled in the art that various modifications and changes can be made without requiring any modification.

100359-500008 (7) international search report

Claims (1)

[Claims] ! Feed the charge into an open tank with vertical walls and separate it from the vertical walls. The molten medium is heated from the point of entry below the surface of the molten medium by the molten medium circulator. subsides below the surface of the melting medium at a point below the point of entry of the heated melting medium. The heated melting medium containing the charge is drawn into the top of the melting medium circulator and melted. Direct the melting medium and charge from vertically downwards to horizontally outwards to move the charge into the melting medium. completely drawn into the melting medium for subsequent heating, bath melting and recirculation. A self-sinking method consisting of feeding the charge into the catalyst body circuit. A method of transporting a charge consisting of solid pieces immersed in a melting medium. The charging conveying molten media circulator is an integral structure with a top plate and a bottom plate with spacing. :The top plate has a circular opening in the center, and the bottom plate has a circular opening in the center of the top plate. A truncated conical shape whose entire center axis is concentric with the center axis of the opening and which is smaller than the distance between the top and bottom plates. A boss is integrally fixed to the boss, a drive shaft is fixed to the boss, and wings extending in the radial direction are fixed to the boss. The roots are fixed to the boss at one end and to the bottom plate over the entire length in the radial direction. The central opening of the plate has an inner diameter 4 times smaller than the inner diameter of the base of the truncated boss; The end is fixed to the top plate.1. The rotation of the drive shaft is caused by @duck media circulator vanes, truncated conical boss and top. In cooperation with the plates and the bottom plate, a gentle vortex is created in the melting medium, thereby increasing the circulation. carried by a heated molten medium that is drawn vertically downwards by a ring. The charge is conveyed into the central opening of the top plate and then passed through the void between the top and bottom plates. Carry water into the melting medium to supply the entire melting medium for subsequent heating and recirculation. 2. A method as claimed in claim 1, characterized in that a flat fluid flow is produced. 3 Scrap is charged into molten aluminum and transported by the action of the molten metal circulator. It has a closed heating tank and an open charging fluidized tank, and has a temperature range of 1220°C to 7100°C. Molten aluminum at ambient temperature is circulated from the open tank through the heated tank and into the open tank. The open tank has a wall inserted between the chain tank and the open tank, and the nuclide has a wall that extends into the open tank. and has two openings in the interposed wall, one of the openings being integral with the wall. on one side of said wall section, and a molten metal circulator is provided on one side of said wall section. In a method of completely melting aluminum scrap in a recirculating device, Open the molten metal circulator near the molten metal circulator to begin the molten metal of the scrap in the molten aluminum. Guide the supply of scrap to the tank, Simultaneously with the melting of the scrap, the wall immediately adjacent to the molten metal circulator is opened from the closed heating tank. The inside of the open tank (tg) is changed from the closed heating tank by drawing the entire melting machine through the opening. Initial scraping of molten aluminum from the heating tank circulates the entire molten metal continuously. Melting and retraction are carried out by a molten metal circulator with spaced bottom and top plates. The top plate has a circular opening in the center, and the bottom plate has a circular opening in the top plate. A truncated conical boss having a center axis concentric with the center axis of the opening is fixedly arranged in the center. The drive shaft is fixed to the boss and the entire length in the radial direction is attached to the boss and the bottom plate. The circular opening in the center of the ffl plate is cut out. An internal angle larger than the diameter of the conical boss is created by the cooperation of the molten metal, and The gentle vortex in the molten metal transports the scrap and this transported scrap Feed vertically downward through the gap between the top and bottom plates into the central opening of the gold top plate. , from a completely closed molten metal heating tank into an open tank, and from this open tank away from a molten metal circulator. The molten metal is drawn through the opening into the closed heating tank in the horizontal direction. A method of melting aluminum scrap produced within the genus. DA closed heating tank, open charging tank charged with molten metal melting medium at the planned height, closed heating tank integral with the wall portion extending into the open charging tank and separating it from the open charging tank and having a One of the openings is on one side of the nuclide section and the molten metal 14Table 1In! 'jJ-5000 08 (2) A wall with both openings always on the surface of the melting medium, molten metal melting medium immersed in the body and placed on one side of the wall portion at a single point in one of both apertures of the nuclide; The molten media circulator, which is submerged, guides the charge sound into the opening near the molten media circulator and the bath. The melting medium circulator is provided with means for initiating melting of the charge in the hot melting medium; Hot water acts on the melting medium from the closed heating tank through the opening 7 in the wall immediately adjacent to the melting circulator. Melting medium? All of the molten metal melting medium is transferred from the closed heating tank to the open charging tank by No circulation, initial scrap melting and drawing of molten metal melting medium are molten medium circulation The molten media circulator has a bottom plate and a top plate with a full distance between them. The plate has a circular opening in the center, and the bottom plate has a truncated part fixed integrally at the bottom. It has a conical boss, and the truncated conical boss has a central axis concentric with the central axis of the circular opening on the top plate. and the drive shaft is fixed to the boss along the entire length in the radial direction with respect to the bottom plate. The blades extend in the radial direction, and the central opening of the top plate is larger than the diameter of the truncated conical boss. What is the inner diameter? The blades are fixed to the top plate at their ends, and the rotation of one interlocking shaft is caused by the rotation of the circulatory blades. This is caused by the cooperation of the truncated conical boss, the top plate, the bottom plate, and the molten metal melting medium, and the molten metal melting medium The gentle direction inside the body is to transport the entire charge into the bath water@melting medium, and transfer the charge to the top plate. A closed heating tank 1, +θ near the circulatory system) through the entire wall opening to the open charging tank, and then from the open charging tank to the bath metal circulator. A fluid circulation passageway that draws the molten medium into the closed heating tank through the opening A charge consisting of non-self-submersible parts, which are formed in a body, is placed in a molten metal melting medium. Recirculation equipment that submerges and transports the water. Left: A common room is divided into a heating part and a maintenance part by a partition wall, and this common room has first and second ends, a front wall, and a rear wall, and a partition wall extending between the front and rear walls has a force l'I Flow of melting medium between heating section and maintenance section and melting medium between heating section and maintenance section It has a passageway that allows the flow of the heated atmosphere above and at the same time, and the front wall near the heating part. A melting medium circulation device integrated with the front wall and communicating with at least one of the holes on the front wall, and an open The opening is easily located in direct proximity to the passageway to facilitate operation of the opening and passageway when a closure device provided in intersecting vertical planes of the mt end and the rear wall to achieve A heating device installed in the heating and maintenance section and the entire common chamber at one point on the melting medium. an RP and a melt injector having means for exhausting the air and a catalyst injector in communication with the maintenance section; Melting medium circulation device.