JP2012001770A - Apparatus for treating floating slag of molten nonferrous metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for treating floating slag, which stirs and breaks down the floating slag produced in a melting furnace for a nonferrous metal, separates a melt of the nonferrous metal mixed in the floating slag from the broken floating slag by gravity separation and recovers the melt, provided that the apparatus causes no partial solidification of the melt of the nonferrous metal in the floating slag immediately after introduced into a floating slag treatment tank and also prevents cooling of the floating slag as a whole, thereby improving the recovery rate of the melt and providing enough time for accomplishing extraction recovery and reducing constraints on construction of a treatment line.SOLUTION: The apparatus comprises: the floating slag treatment tank 1 which upwardly opens and holds the floating slag; a stirring blade 2 which is arranged in the floating slag treatment tank 1; a rotary driving means 3 of the stirring blade 2; and a tilting means 4 for tilting the floating slag treatment tank 1. A cylindrical part 1a standing straight is integrally formed in the middle position of the bottom of the floating slag treatment tank 1. A rotary driving shaft 30 is concentrically arranged in a non-contacting state inside the cylindrical part 1a. An installation base 20 of the stirring blade 2 is coupled to the top part 30a of the rotary driving shaft 30 in a manner incapable of relative rotation. The apparatus has a preheating mechanism 5 for externally preheating the floating slag treatment tank 1 before introducing the floating slag.

Description

  The present invention relates to a buoyancy treatment apparatus used to separate and recover a nonferrous metal melt mixed in a buoy produced in a nonferrous metal melting furnace such as aluminum or an alloy thereof.

  Generally, when non-ferrous metals such as aluminum and its alloys are refined from ore, or when non-ferrous metals are taken out from waste materials containing non-ferrous metal scraps and non-ferrous metals, the non-ferrous metals are melted in a high-temperature furnace. Then, non-metallic substances (mainly oxides) are generated as floats called dross, noro, slag, etc. on the surface of the melt. Therefore, since the melt of non-ferrous metal is mixed in the float by several percent to several tens of percent, the non-ferrous metal melt is recovered from the float in terms of both effective use of resources and economy. It becomes important.

  As a means to recover non-ferrous metal melt from the float in this way, the float floated from the melting furnace is put into the separation tank of the porous bottom plate and allowed to stand, and the non-ferrous metal melt is separated by the difference in specific gravity from the float. Then, a stationary separation method (for example, Patent Document 1) that drops from the hole in the bottom plate, a squeezing extraction method (for example, Patent Document 2) in which the float is accommodated in a compression chamber of the porous bottom plate, and is squeezed to squeeze the non-ferrous metal melt. The non-ferrous metal melt that has been separated and settled by storing the float in the treatment tank, lowering the stirring blade that has been waiting upward, and entering the treatment tank, stirring the float by rotation of the stirring blade The stirring separation method (for example, patent document 3) etc. which flowed out from the bottom hole of the processing tank was employ | adopted.

  However, the above-mentioned stationary separation method has a drawback that the non-ferrous metal melt contained therein cannot be sufficiently separated and the recovery rate is poor because the buoyancy is generally in a solid state. In addition, the above-described compression extraction method has a problem that the apparatus configuration is complicated and large, the equipment cost is very high, the pressing can be performed only in small amounts, and the processing efficiency is inferior. On the other hand, in the conventional stirring separation method, the non-ferrous metal melt is easily separated by specific gravity by crushing the float, but the stirring operation is performed on the upper side of the treatment tank in order to prevent the drive unit of the stirring blade from deteriorating due to high heat. Except for the time, since an elevating mechanism for retracting the stirring blade upward is provided, the equipment cost is high, and it is difficult to apply to a processing apparatus for a small melting furnace. This is because, in a small melting furnace, there is little generation of buoyancy, so the amount of processing at one time is also reduced, and the total amount of heat of the buoy itself is small and easy to cool down. Because there is no time margin for transporting to the tank, and the flotation scraped out from the melting furnace is received directly in the processing tank and immediately collected and processed, it requires a structure with no accessories above the processing tank. .

  Therefore, in recent years, one of the applicants of the present application has integrally formed a cylindrical portion upright at the center of the bottom of the treatment tank as a flotation treatment apparatus provided with a stirring blade in the flotation treatment tank. A rotating drive shaft is concentrically arranged on the inner side, and a mounting base of a stirring blade is connected to the top of the rotary drive shaft, and the rotary drive shaft is driven to rotate at its lower end side, and the specific gravity separated non-ferrous metal melt. Has been proposed for extracting and recovering the product by tilting the treatment tank (Patent Document 4). In this buoyancy treatment apparatus, the high heat of the buoy stored in the buoyancy treatment tank is difficult to be transmitted to the rotation drive shaft, the deterioration of each part of the rotation drive means due to high heat is prevented, and the entire apparatus exhibits excellent durability. Since there is no attachment above the treatment tank, the float that has been scraped from the scraping port of the melting furnace is directly put into the treatment tank, and the float is immediately crushed with a stirring blade to give the nonferrous metal melt a specific gravity. It can be separated and extracted and recovered, so that it is highly suitable for a small melting furnace.

JP-A-7-252547 Japanese Patent Laid-Open No. 10-195553 JP-A-9-87764 JP 2009-293080 A

  However, even in the buoyancy treatment apparatus according to the above proposal, the non-ferrous metal melts in the buoy near the wall surface because the buoy immediately after being put into the buoyancy treatment tank is deprived of heat by contacting the wall surface of the low temperature treatment tank. The solidification of the material leads to a decrease in the recovery rate, and the entire buoyancy is quickly cooled down, requiring a quick work operation until extraction and recovery, and the labor load is large, and the melt extraction site is far from the melting furnace. Since the position cannot be set, there is a problem that the restriction on the construction of the processing line is large and the extraction and recovery operation is forced under a harsh working environment.

  In view of the above situation, the present invention stirs and crushes the flotation produced in a nonferrous metal melting furnace, and collects the nonferrous metal melt mixed in the flotation by separating it from the flotation crushed material. As a buoyancy treatment apparatus used for the buoyancy treatment tank, there is no fear that the non-ferrous metal melt in the levitation immediately after being put into the floatation treatment tank is partially solidified, and the entire buoyancy is not easily cooled, and the recovery rate of the melt In addition to the improvement in the time required for the extraction and recovery, it is possible to reduce the labor burden without being forced to perform an urgent work operation, and there are less restrictions on the construction of the processing line, and the extraction site is located far from the melting furnace. It aims to provide something that can be set to improve the working environment.

  In order to achieve the above-mentioned object, the float processing apparatus for molten non-ferrous metal according to claim 1 of the present invention is provided with reference numerals in the drawings, and is floated to open upward and accommodate the float. The tank 1, the stirring blade 2 disposed in the float processing tank 1, the rotation driving means 3 of the stirring blade 2, and the float tank 1 is tilted so that the non-ferrous metal melt separated by specific gravity flows out. A rotating drive shaft provided with a tilting means 4, wherein an upright cylindrical portion 1 a is integrally formed at the center of the bottom of the buoyancy treatment tank 1, and is concentrically arranged in a non-contact state inside the cylindrical portion 1 a The mounting base portion 20 of the stirring blade 2 is connected to the top portion 30a of the rotor 30 so as not to be relatively rotatable, and is provided with a preheating mechanism 5 that preheats the levitating treatment tank 1 from the outside before accommodating the levitating float.

  According to a second aspect of the present invention, in the floatation apparatus according to the first aspect, the preheating mechanism 5 includes a sheathed heater 50 arranged so as to go around at least the bottom of the floatation treatment tank 1.

  According to a third aspect of the present invention, in the floatation processing apparatus of the second aspect, the sheathed heater 50 includes a plurality of sheathed heaters 50 independent of each other, and the sheathed heaters 50 are located at different positions at least at the bottom of the floatable treatment tank 1. It is set as the structure which is arrange | positioned so that it may go around.

  According to a fourth aspect of the present invention, in the buoyancy treatment apparatus according to any one of the first to third aspects, the stirring blades 2 are equally distributed at three or more locations in the circumferential direction of the mounting base 20 and are stretched radially from the mounting base 20. The blade pieces 22a to 22e, 23a, and 23b to be taken out are provided, and the blade pieces are configured to rotate in the floating treatment tank 1 at different heights.

  According to a fifth aspect of the present invention, in the float processing apparatus according to any one of the first to fourth aspects, a bowl-shaped discharge port 1c protruding forward is formed at the upper edge portion 1b of the float process tank 1, It faces the discharge port 1c and is detachably disposed on the upper part of the floatation tank 1, and includes an extraction guide member 6 that prevents the float from being discharged and allows the non-ferrous metal melt to pass through.

  According to a sixth aspect of the present invention, in the flotation processing apparatus according to any one of the first to fourth aspects, a bowl-shaped discharge port 1c protruding forward is formed at the upper edge 1b of the flotation treatment tank 1, A pair of ash discharge guide plates 7 are provided on both the left and right sides of the discharge port 1c.

  Next, effects of the present invention will be described with reference numerals in the drawings. According to the levitation processing apparatus of the first aspect of the present invention, the buoyancy treatment tank 1 can be preheated by the preheating mechanism 5 before the levitation is accommodated. Even if it comes into contact with the wall surface, heat is not lost and the high temperature can be maintained. Therefore, there is no concern that the non-ferrous metal melt in the float is partially solidified, and the entire float is difficult to cool. Therefore, the recovery rate of the melt is improved, and a time margin until extraction and recovery is obtained, so that an urgent work operation is not required, and the labor burden is reduced accordingly. Moreover, since the extraction part can be set at a position far from the melting furnace with the above time margin, the restriction on the processing line construction is reduced, for example, by providing the extraction part at a position where hot air from a high temperature melting furnace is difficult to reach. Work environment can be improved. In this buoyancy treatment apparatus, the rotary drive shaft 30 is disposed in a non-contact state inside the cylindrical portion 1a rising from the bottom center of the buoyancy treatment tank 1, and the stirring blade 2 is placed on the top portion 30a of the rotary drive shaft 30. Since the mounting base 20 is connected, the high heat of the float stored in the processing tank 1 is not easily transmitted to the rotary drive shaft 30, and the deterioration of each part of the rotary drive means 3 due to the high heat is prevented. The whole demonstrates excellent durability.

  According to the invention of claim 2, since the preheating mechanism 5 includes the sheathed heater 50, the degree of preheating can be easily adjusted by thyristor control or the like, and the sheathed heater 50 circulates at least at the bottom of the buoyancy treatment tank 1. Therefore, as compared with the case where other heating means such as a gas burner is adopted as the preheating mechanism 5, the structure is remarkably simplified, and assembling and manufacturing as a buoyancy treatment apparatus is easy and compact. There is an advantage that it can be configured.

  According to the invention of claim 3, as the preheating mechanism 5, a plurality of mutually independent sheathed heaters 50 are arranged so as to circulate at least at the bottom of the floatation processing tank 1 at different positions. By individually adjusting the energization amount of these sheathed heaters 50, there is an advantage that the float bath 1 can be preheated quickly and to have an appropriate temperature distribution.

  According to the invention of claim 4, the stirring blade 2 is provided with blade pieces 22 a to 22 e, 23 a, and 23 b that are evenly arranged at three or more locations in the circumferential direction of the mounting base 20 and project radially, and these blade pieces are different from each other. Since the inside of the float tank 1 is rotated at a height, the float floated in the treat tank 1 can be efficiently and uniformly crushed, and the specific gravity separation of the non-ferrous metal melt can easily proceed. The recovery rate and processing efficiency of the melt are improved.

  According to the invention of claim 5, when extracting the non-ferrous metal melt which has been separated by settling the buoyancy treatment tank 1, the extraction guide member 6 disposed inside the discharge port 1c prevents the buoy from being discharged. From the discharge port 1c, only the non-ferrous metal melt can be efficiently discharged and recovered, and since the extraction guide member 6 is detachable, the next time the floating float remaining in the treatment tank 1 is discharged, The extraction guide member 6 can be removed and the discharge operation can be performed efficiently.

  According to the sixth aspect of the present invention, when the buoyancy treatment tank 1 is tilted again after the non-ferrous metal melt is extracted to discharge the remaining buoy, the ash discharge guide plates 7 on the left and right sides discharge the buoy. It is guided to the outlet 1c and is efficiently discharged from the outlet 1c without being scattered.

It is a top view of the buoyancy processing apparatus concerning one embodiment of the present invention. It is a side view of the floatation apparatus. It is a rear view of the floatation apparatus. It is a vertical side view of the apparatus main-body part of the floatation apparatus. It is a vertical front view which shows the preheating mechanism of the floatation processing tank in the floatation apparatus. It is a top view which shows the sheathed heater of the preheating mechanism. The stirring blade of the floatation apparatus is shown, (a) is a plan view, (b) is a side view seen from one direction, and (c) is a half side view seen from the other direction. The state which attached the extraction guide member and the ash discharge | release guide plate to the buoyancy processing tank of the buoyancy processing apparatus is shown, (a) is a top view of a half part, (b) is a vertical rear view, (c) is (a) It is a cross-sectional arrow view of the XX line. The same ash discharge | release guide plate is shown, (a) is a top view, (b) is a rear view, (c) is sectional drawing of the YY line of (a). The extraction guide member is shown, (a) is a plan view, (b) is a side view, and (c) is a front view. It is a rear view of the tilting means in the floatation apparatus. It is a side surface which shows tilting operation by the tilting means.

  Hereinafter, an embodiment of a non-ferrous metal melt levitating apparatus according to the present invention will be specifically described with reference to the drawings.

  In the buoyancy treatment apparatus M shown in FIGS. 1 to 3, the apparatus main body 10 including the buoyancy treatment tank 1 is mounted on a hand-drawn cart 8 having a handle bar 81. As shown in FIG. 4, the apparatus main body 10 includes a float processing tank 1 having a substantially circular shape in plan view that is open upward and has an agitating blade 2 inside inside a vertical cylindrical outer shell 11. Between the outer surface side of the processing tank 1 and the outer peripheral cover plate 11a and the lower surface cover plate 11b constituting the outer shell 11, a heat insulating material 12 made of ceramic fiber is loaded. In addition, a drive motor 31 and a gear box 32 which are driving parts of the rotation driving means 3 of the stirring blade 2 are fixedly installed at the center of the base frame 80 of the carriage 8. 6 is an extraction guide member mounted on the opening of the float bath 1, 7 is a pair of left and right ash discharge guide plates attached to the upper edge 1 b of the treatment bath 1, and 9 is the opening of the treatment bath 1. It is a heat insulating cover to be sealed.

  The buoyancy treatment tank 1 is made of cast iron such as FC20, and is integrally formed with a cylindrical portion 1a that stands upright at the center of the bottom portion, and at one place on the upper edge portion 1b that projects outward in the circumferential direction. A protruding bowl-shaped discharge port 1c is formed. A plurality (six in the figure) of sheathed heaters 50 constituting the preheating mechanism 5 are arranged at the bottom of the processing tank 1 so as to circulate in contact with the outer peripheral surface of the processing tank 1.

  The inner side of the cylindrical portion 1a of the buoyancy treatment tank 1 is vertically permeable, and is erected on the rotary drive shaft 30 projecting vertically upward from the gear box 32 and the mounting frame portion 80b of the gear box 32. The rotary shaft holding cylinder 34 that rotatably holds the rotary drive shaft 30 is disposed in a concentric manner in a non-contact state inside the cylindrical portion 11. And although the top part of the cylindrical part 1a is located a little lower than the upper edge part 1b of the floatation processing tank 1, the upper end part 30a of the rotational drive shaft 30 is the upper edge part 1b of the processing tank 1 from the cylindrical part 1a. The short cylindrical mounting base 20 of the stirring blade 2 is fitted on the upper end 30a, and the mounting base 20 is connected to the rotary drive shaft 30 by a connecting pin 33 penetrating in the radial direction. ing. The lower end portion of the rotary drive shaft 30 is located in the gear box 32 and incorporated in a gear mechanism (not shown), and the stirring blade 2 rotates integrally with the rotary drive shaft 30 by driving the drive motor 31.

  The top end of the rotary shaft holding cylinder 34 is lower than the top end of the cylindrical portion 1a, and protrudes from the rotary shaft holding cylinder 34 and between the rotary shaft holding cylinder 34 and the inner periphery of the cylindrical portion 1a. The heat insulating material 12 is also interposed between the upper side of the rotary drive shaft 30 and the inner periphery of the cylindrical portion 1a. In addition, L shown in FIG. 4 has shown the maximum level of the float which accommodates in the float processing tank 1, and the top end of the cylindrical part 1a becomes higher than this maximum level L. FIG.

  The carriage 8 has a pair of left and right fixed wheels 82 attached to the front part of a substantially rectangular frame-like base 80 formed by assembling the shape steel material 80a, and a pair of left and right universal wheels 83 attached to the rear part thereof. In addition, horizontally long rectangular tube members 84 are fixed to each other through two angular annular mounting plates 85 at the front and rear, and the lower end portion of the handle bar 81 made of pipe material is detachably attached to the left and right sides of the rear end of the base 80. A vertical cylindrical handle mounting portion 86 is formed to be inserted into the handle. Thus, the left and right rectangular tube members 84 are divided into two upper and lower sections, and the front and rear ends are opened in the shape of a Japanese character to form a forklift claw insertion portion 87.

  As shown in FIGS. 5 and 6, each of the sheathed heaters 50 constituting the preheating mechanism 5 is an open annular main body 50 a that circulates around the bottom of the floatation tank 1, and extends in parallel from the main body 50 a. The terminal portions 50c at the tips of both the lead portions 50b are inserted into a terminal box 51 provided on the side surface portion of the apparatus main body portion 10. These sheathed heaters 50 have different diameters of the main body portion 50a, and the first and second main body portions 50a from the smaller diameter side are spaced from each other inside the cylindrical portion 1a of the floatation treatment tank 1. In addition to the arrangement, the remaining main body 50a is sequentially arranged from the lowest position of the processing tank 1 to the outside in the radial direction. Further, the terminal portions 50 c of these sheathed heaters 50 are arranged in the terminal box 51. Note that reference numeral 52 in FIG. 2 indicates an outlet box for connecting an external power source to these sheathed heaters 50.

  The stirring blade 2 is entirely made of steel such as SS-400, and as shown in FIGS. 7A to 7C, the short cylindrical mounting base 20 and the outer periphery thereof are equally spaced at 120 ° from each other. The vertical square bars 21a to 21c that are suspended by being welded and fixed at the three locations, respectively, and the base ends of the vertical square bars 21a to 21c are welded and fixed along the radial direction of the buoyancy treatment tank 1 And a plurality of square rod-like blade pieces 22a to 22e projecting diagonally downward (a total of five in the figure), triangular blade pieces 23a and 23b integrated at the lower ends of the vertical rod bodies 21a and 21b, and a vertical angle It is comprised with the reinforcement ring 24 which connects the rod bodies 21a-21c by the lower part side. Then, as shown in FIG. 7C, a gap t1 is set between the vertical bars 21a to 21c and the outer peripheral surface of the cylindrical portion 1a of the buoyancy treatment tank 1, and the mounting base 20 A gap t2 is also set between the lower end surface and the top end of the cylindrical portion 1a, so that the entire stirring blade 2 is held in a non-contact state with respect to the processing tank 1. In the figure, reference numeral 25 denotes a cover plate that is welded and fixed on the mounting base 20 to close the upper end opening of the center hole 20a, and 20b is a pin insertion hole provided in the mounting base 20.

  The square bar-shaped blade pieces 22a to 22e of the stirring blade 2 are radially arranged in the three directions from the rotation axis at the same inclination angle, but the arrangement heights are different from each other and the corners are alternately alternately arranged from the higher side. The orientation is changed between a posture in which one ridge line of the rod shape is upward and a posture in which one side surface is upward. Further, the triangular blade pieces 23a and 23b have an upper edge that is obliquely downward with the same inclination angle as the square rod-shaped blade pieces 22a to 22e, and a lower edge that has an arc shape along the inner bottom surface of the buoyancy treatment tank 1, The top edge heights are different. And these blade | wing pieces 22a-22e, 23a, 23b are set so that the vertical cross section which match | combined these rotation track | orbits may continue substantially without the clearance gap.

  As shown in FIGS. 8A to 8C, a pair of left and right strip-shaped guide mounting brackets 13 are attached to the upper edge portion 1 b of the buoyancy treatment tank 1 at both sides of the discharge port 1 c. It is fixed so as to be arranged in a letter shape. A pair of left and right ash discharge guide plates 7 are mounted using an inward locking groove 13a formed between the upper edge portion 1b of the processing tank 1 and each guide mounting bracket 13, and both An extraction guide member 6 is further attached via an ash discharge guide plate 7.

  As shown in detail in FIGS. 9A to 9C, the pair of left and right ash discharge guide plates 7 are mutually connected via a horizontal connection bar 71 and a bracket plate 72 projecting forward from the vicinity of both ends thereof. The discharge guide member 70 is integrally connected in a state of being arranged in a square shape. Further, at the lower end portion of each ash discharge guide plate 7, a lock formed between a lock protrusion 7a protruding outward by bending over almost the entire length and two upper and lower strip pieces 7b fixed to the inner surface side. A groove 73 is provided. Thus, the discharge guide member 70 is inserted into both the locking grooves 13a on the floating processing tank 1 side as shown in FIG. Both ash discharge guide plates 7 that are locked so as not to be detached and rise vertically are arranged on both left and right sides of the discharge port 1 c of the treatment tank 1.

  On the other hand, as shown in detail in FIGS. 10A to 10C, the extraction guide member 6 is a perforated plate 61 made of punching metal that is curved forwardly on the lower surface side of the substantially trapezoidal top plate portion 61. Is suspended from the top edge of the top plate 61, and a downward U-shaped handle 62 is fixed to the center of the top plate 61 on the upper surface side. Accordingly, the extraction guide member 6 is inserted into the left and right engaging grooves 73 of the discharge guide member 70 that is first attached to the float processing tank 1 as shown in FIGS. 8 (a) to 8 (c). By inserting the side edge portion, it is attached to the processing tank 1 so as not to be detached forward and upward. In this attached state, the perforated plate 61 of the extraction guide member 6 is disposed close to the inside of the discharge port 1 c of the processing tank 1.

  As shown in FIGS. 1 to 3, the heat insulating cover 9 is a notched circular flat plate portion 91 having an outer diameter slightly larger than the opening diameter of the treatment tank 1, and a hexagonal shape that bulges upward in the center of the flat plate portion 91. A central bulging portion 92 and a rectangular tubular bulging portion 93 bulging upward along a radial direction parallel to the notch side edge 91a of the flat plate portion 91 are formed. A pair of left and right downward U-shaped handles 94 are fixed to the left and right. As shown in FIG. 1, the heat insulating cover 9 covers the top of the extraction guide member 6 by covering the processing tank 1 with the peripheral edge of the notched circular flat plate portion 91 placed on the upper edge 1 b of the processing tank 1. Together with the plate portion 61, the entire opening of the processing tank 1 is substantially shielded. In addition, the center side of the stirring blade 2 protruding higher than the upper edge 1b of the processing tank 1 is accommodated in the central bulging portion 92.

  As shown in FIGS. 11 and 12, as the tilting means 4, a tilt frame 41 and a power cylinder 42 that tilts the tilt frame 41 are installed at the melt extraction position. The power cylinder 42 is an electric ball screw system driven by a motor 40. The tilt frame 41 is formed in a square hook shape opened upward and rearward by assembling a channel material or an angle material, and stepped carriage receiving portions 41a are provided on both the left and right sides of the inner lower portion. The upper left and right sides of the tilt frame 41 are pivotally supported on the tops of the left and right columns 44 via a pivot 43 fixed to the tilt frame 41, and are suspended so as to tilt forward and backward between the columns 44. Yes. The power cylinder 42 is pivotally supported on the pivot base 45 so as to be swingable back and forth, and the tip of the telescopic rod 42a is pinned to the tip of the lever 46 fixed to the outer end of the pivot 43 on one side. The tilt frame 41 is held in a horizontal position when the telescopic rod 42a is extended, and is set so as to be in a forward tilt position when the telescopic rod 42a is contracted. ing.

  In order to float a non-ferrous metal melt such as aluminum or an alloy thereof by the float treatment apparatus M having the above configuration, first, an ash discharge guide member 70 and an extraction are placed on the float treatment tank 1 as shown in FIGS. The treatment tank 1 is preheated to a predetermined temperature by energizing the sheathed heater 50 of the preheating mechanism 5 with the guide member 6 and the heat retaining cover 9 attached. The degree of preheating varies depending on the type of non-ferrous metal to be processed, but generally aluminum and its alloys should be set to be about 300 to 500 ° C. at the inner bottom of the treatment tank 1, A radiation thermometer can be used.

  After the preheating, the energization to the sheathed heater 50 is stopped, the carriage 8 on which the apparatus main body 10 is mounted is carried to a melting furnace (not shown), and the buoyancy treatment tank 1 faces directly below the scraping port. After the thermal insulation cover 9 is removed, the float in the furnace is scraped out and put into the treatment tank 1 with an appropriate scraping tool, and the stirring blade 2 is rotated by the operation of the rotation driving means 3 to rotate the float. Crush the mixture. At this time, since the buoyancy treatment tank 1 is preheated and has a high temperature, even if the buoy immediately after being put into the treatment tank 1 comes into contact with the wall surface of the treatment tank, heat is not taken away, and thus the non-ferrous iron in the buoyancy There is no concern that the metal melt is partially solidified, and the entire buoyancy is difficult to cool, so that the subsequent processing can be performed with sufficient time.

  In the above crushing and crushing process, the specific gravity separation between the float and the non-ferrous metal melt proceeds by the stirring action, and the melt that has been taken into the lump is also released by crushing the lump lump. As a result, the melt settles and accumulates at the bottom of the buoyancy treatment tank 1. In particular, in the present embodiment, the stirring blade 2 has blade pieces 22a to 22e, 23a, and 23b that project radially from the center in three directions, and these blade pieces have different heights from each other in the floating treatment tank 1. Since it rotates, the float placed in the treatment tank 1 can be crushed efficiently and uniformly, and the specific gravity separation of the non-ferrous metal melt can easily proceed, resulting in improved recovery and processing efficiency of the melt. To do. In the molten aluminum, the specific gravity of aluminum is about 2.7, whereas the specific gravity of the float oxide is about 1.37, and there is a sufficient specific gravity difference for separation by gravity.

  Thus, after the non-ferrous metal melt has been separated by specific gravity, the main body of the apparatus is moved together with the carriage 8 using a forklift claw insertion portion 87 of the carriage 8 with the handle bar 81 of the carriage 8 removed. 10 to the melt extraction position. Then, as shown by the solid lines in FIGS. 11 and 12, the carriage 8 is brought into the tilting frame 41 in a horizontal posture, and the mounting plates 85 on both the left and right sides of the carriage 8 are placed with the discharge port 1 c of the float processing tank 1 facing forward. The vehicle is placed on the carriage receiving portion 41a and accommodated in the tilting frame 41 with the wheels 82 and 83 floating. Next, the non-ferrous metal that flows out from the discharge port 1c of the processing tank 1 by contracting the power cylinder 42 and tilting the floating processing tank 1 by tilting the tilting frame 41 forward as shown by the phantom line in FIG. The molten material is poured into a receiving tank 47 with wheels arranged below, and finally cooled and solidified to be recovered as an ingot. At this time, since the discharge of floating is prevented by the perforated plate 61 of the extraction guide member 6 disposed inside the discharge port 1c, only the non-ferrous metal melt can be efficiently discharged and recovered from the discharge port 1c.

  In order to take out the float remaining in the float processing tank 1 after the recovery of the non-ferrous metal melt, the tilt frame 41 is temporarily returned to the horizontal position, the extraction guide member 6 is removed, and the tilt frame 41 is moved forward again. The tilted posture may be adopted, and the float in the processing tank 1 may be discharged and accommodated in a required container, for example, the same type as the wheeled receiving tank 47 and having a large capacity. When discharging the float, it is preferable to rotate the stirring blade 2 to promote the discharge. At this time, since the ash discharge guide plates 7 of the ash discharge guide member 70 are arranged in a square shape on both sides of the discharge port 1c, the buoy is guided to the discharge port 1c and efficiently discharged without scattering. Discharged from.

  In this levitation treatment apparatus M, the preheating of the levitation treatment tank 1 can prevent the nonferrous metal melt in the levitation immediately after being charged from partially quenching and solidifying, so that the recovery rate of the melt is improved. In addition, even when the amount of floatation is small, a time allowance for extraction and recovery can be obtained, so that an urgent work operation is not forced, and the labor load is reduced accordingly, and restrictions on the construction of the processing line are reduced. Therefore, the working environment can be improved by providing the extraction part at a position far from the melting furnace, for example, a position where hot air from the high-temperature melting furnace is difficult to reach. Further, the rotational drive shaft 30 is disposed in a non-contact state inside the cylindrical portion 1a rising from the bottom center of the float processing tank 1, and the top portion 30a of the rotational drive shaft 30 protruding from the top end of the cylindrical portion 1a is stirred. Since the blades 2 are connected, it is difficult for the high heat of the floats stored in the float processing tank 1 to be transmitted to the rotary drive shaft 30, and the deterioration of each part of the rotary drive means 3 due to the high heat is prevented. Demonstrate durability.

  In the present invention, other heating means such as a gas burner can be used as the preheating mechanism 5 of the levitating treatment tank 1, but in the case of the illustrated sheathed heater 50, it is arranged so as to go around at least the bottom of the levitating treatment tank 1. Therefore, the structure is much simpler than when other heating means are used, and it is easy to assemble and manufacture as a buoyancy treatment device. There is an advantage that it can be easily and accurately adjusted. Further, as in the embodiment, the preheating mechanism 5 is constituted by a plurality of mutually independent sheathed heaters 50, and these are arranged so as to circulate at least the bottom of the floatation treatment tank 1 at different positions. For example, by individually adjusting the energization amount of each sheathed heater 50, there is an advantage that the floatation tank 1 can be preheated quickly and to have an appropriate temperature distribution.

  About the stirring blade 2, although what was equipped with the blade pieces 22a-22e, 23a, and 23b which are equally distributed in three places of the circumferential direction of the attachment base part 20 and protrudes radially from this attachment base part 20 was illustrated in these embodiments, The blade piece may be configured to be provided at three or more locations in the circumferential direction of the mounting base 20 for sufficiently stirring and crushing the float. However, since the capacity of the buoyancy treatment tank 1 is reduced at five or more circumferential directions, it is preferable to have three or four circumferential directions. Moreover, about the number and shape of a some blade piece, it can set variously besides illustration. If the mounting base 20 of the stirring blade 2 is detachable from the top 30a of the rotary drive shaft 30 as in the embodiment, there is an advantage that replacement and repair due to wear or damage of the stirring blade 2 can be easily performed. .

  The tilting means 4 is not limited to the system using the tilting frame 41 as in the embodiment. For example, the tilting drive mechanism such as a power cylinder mounted on the cart itself is supported by tilting the apparatus main body 10 on the cart. Various methods such as a method of tilting the apparatus main body 10 can be adopted. Further, the carriage may be configured to move on the rail track by a manual push type or a power run type.

  In addition, in the buoyancy treatment apparatus of the present invention, the connection structure between the mounting base 20 of the stirring blade 2 and the rotation drive shaft 5, the tilt mechanism of the tilt means 4, the rotation transmission mechanism of the rotation drive means 3, the extraction guide member 6, ash In addition to the embodiment, various design changes can be made to the detailed configuration such as the configuration and mounting structure of the discharge guide plate 7 and the heat insulating cover 9.

DESCRIPTION OF SYMBOLS 1 Floating processing tank 1a Cylindrical part 1b Upper edge part 1c Discharge port 10 Apparatus main-body part 2 Stirring blade 20 Mounting base 22a-22e Square rod-shaped blade piece 23a, 23b Triangular blade piece 3 Rotation drive means 30 Rotation drive shaft 30a Top part 4 Tilt means 5 Preheating mechanism 50 Seeds heater 6 Extraction guide member 7 Ash discharge guide plate M Flotation treatment device

Claims (6)

A flotation treatment apparatus used for stirring and crushing a float produced in a non-ferrous metal melting furnace and separating and recovering a non-ferrous metal melt mixed in the float from a flotation crushed material,
Floating treatment tank that opens upward and accommodates buoyancy, a stirring blade disposed in the buoyancy treatment tank, rotation driving means for the stirring blade, and the non-ferrous metal melt separated by specific gravity And tilting means for tilting the buoyancy storage tank,
A cylindrical portion standing upright at the center position of the bottom of the float processing tank is integrally formed, and a mounting base portion of the stirring blade is attached to the top of the rotational drive shaft arranged concentrically in a non-contact state inside the cylindrical portion. It is connected so that it cannot rotate relative to the
A non-ferrous metal flotation treatment apparatus comprising a preheating mechanism for preheating the flotation treatment tank from the outside before containing the float.   The non-ferrous metal molten metal float treatment apparatus according to claim 1, wherein the preheating mechanism includes a sheathed heater arranged so as to go around at least a bottom portion of the floatation treatment tank.   The float of non-ferrous metal melt according to claim 2, comprising a plurality of sheathed heaters independent from each other, and these sheathed heaters are arranged so as to circulate at least at the bottom of the float bath at different positions. Processing equipment.   The agitating blade is provided with blade pieces that are equally distributed at three or more circumferential directions of the mounting base and project radially from the mounting base, and these blade pieces rotate in the float processing tank at different heights. The non-ferrous metal molten metal float treatment apparatus according to any one of claims 1 to 3, wherein the float float treatment apparatus is configured to do so.   A bowl-shaped discharge port that protrudes forward is formed at the upper edge of the float processing tank, and it is detachably disposed at the upper part of the float process tank so as to face the discharge port. The non-ferrous metal molten metal float treatment apparatus according to any one of claims 1 to 4, further comprising an extraction guide member that prevents the molten non-ferrous metal from passing therethrough.   A pair of ashes are formed in the upper edge portion of the floating treatment tank so as to protrude forward, and rise from the upper edge portion on both the left and right sides of the discharge port and are arranged in a C shape. The non-ferrous metal molten metal float treatment apparatus according to any one of claims 1 to 4, further comprising a discharge guide plate.

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