JP6284160B2 - Non-ferrous metal melting furnace - Google Patents

Description

  The present invention relates to a tower-type nonferrous metal melting furnace intended for nonferrous metals such as aluminum alloys, zinc and magnesium.

  Many tower-type nonferrous metal melting furnaces for melting aluminum alloys and the like have been devised. An example of such a conventional non-ferrous metal melting furnace is shown in FIGS. These conventional non-ferrous metal melting furnaces are used as follows.

  First, the melted material (nonferrous metal) is sequentially added from the upper part of the tower 71 with the tower lid 72 attached to the exhaust port opened. The molten material that has been introduced passes through the tower 71 and descends to the melting chamber 73. The dissolved material descending into the melting chamber 73 is brought into a dissolved state or a semi-molten state by the flame (direct fire) of the melting burner 74 and flows down to the holding chamber 75. The molten material flowing down to the holding chamber 75 is heated by the holding burner 76 to be in a molten state (molten metal), passes through the hot water outlet 77 and is supplied to the outside of the furnace.

  The non-ferrous metal melting furnace 70 is provided with a side burner 78 between the melting chamber 73 and the holding chamber 75. The side burner 78 raises the temperature of the melted material to a molten state and smoothly holds the holding chamber 75. To flow down.

  The non-ferrous metal melting furnace 70 having such a configuration needs to be periodically cleaned. At that time, the charging of the melting material is stopped, the melting chamber 73 is emptied, and the dech is inserted through the door opening 79 provided at the downstream end of the holding chamber 75. Due to its large size, derecchi may not reach the upstream side of the melting chamber 73.

  Therefore, a melting burner 80 and a cleaning port 81 with a door are provided in the melting chamber 73, and the melting burner 80 is burned to melt and flow down the dissolved material adhering to the melting chamber 73. The melted material is inserted into the holding chamber 75 together with the scales, blades, debris, and the like, and then discharged from the furnace by the deckle inserted through the opening 79 of the holding chamber 75.

JP 2000-146447 A JP 2002-310571 A

The above-described conventional non-ferrous metal melting furnace 70 has the following problems to be solved.
(A) Since the side burner 78 is provided between the melting chamber 73 and the holding chamber 75, the structure of the melting furnace 70 becomes complicated and the equipment cost increases.

  (B) Since the molten material in a semi-molten state stays in the hearth (runner channel) of the moving path from the melting chamber 73 to the holding chamber 75, the furnace inner tile of the side burner 78 is blocked. Therefore, the furnace inner burner tile of the side burner 78 becomes abnormally hot, and the combustion gas of the side burner 78 backfires outside the furnace.

  In order to prevent such a situation, the main body of the side burner 78 is periodically removed (about every 4 hours), and the burner tile and the hearth (runner) in the furnace are manually used by using a deck or the like. I need to clean it. This work is extremely hard because it is performed at high temperatures.

  If this state is left unattended, a safety problem such as a fire due to a backfire occurs. Further, when the melting material is an aluminum alloy, the refractory constituting the furnace is eroded, corundum and expands and expands, and the furnace is destroyed.

  (Ii) Since the melter burner 80 and the cleaning port 81 are provided in the melting chamber 73, the structure of the melting furnace 70 becomes complicated and the equipment cost increases. Moreover, since the large opening part called the cleaning port 81 is formed, melting | dissolving heat efficiency falls.

  The present invention was devised in view of these problems, and an object of the present invention is to provide a non-ferrous metal melting furnace that is simple in structure, inexpensive in equipment cost, and excellent in safety and melting heat efficiency.

This will be described with reference to FIGS. The non-ferrous metal melting furnace according to the invention of claim 1 has a floor surface that includes a connection port 23 of the preheating tower 10 provided near the upper front side of the melting chamber 20 and a melting outlet 24 provided on the lower rear side of the melting chamber 20. A gentle slope 27, which is connected by a substantially L-shaped movement path 25 having a constant width F, faces the tower connection port 23 and forms the first half of the movement path 25, is connected to the dissolution outlet 24 and forms the latter half of the movement path 25. A plurality of melting burners 21 are connected to the downward inclined ceiling portion 29 that is connected via the connecting portion 28 and is opposed to the connecting portion 28 via the moving path 25 , and connected to the melting outlet. The holding chamber 30 has a substantially elliptical plane shape in which the distance D1 between the upstream end and the downstream end thereof is shorter than the distance D2 between the side ends, and the melting chamber 20 is not provided with other burners and cleaning ports. To do.

The floor surface of the non-ferrous metal melting furnace according to the invention of claim 2 includes a connection port 23 of the preheating tower 10 provided on the upper front side of the melting chamber 20 and a melting outlet 24 provided on the lower rear side of the melting chamber 20. A steep slope 26 that forms a front half of the movement path 25 facing the tower connection port 23 and a gentle slope 27 that forms a rear half of the movement path 25 connected to the dissolution outlet 24 and is connected by a substantially L-shaped movement path 25 having a constant width F. Are connected to each other through the connecting portion 28, and the width of the steep slope 26 and the gentle slope 27 is made equal to the inner diameter E of the preheating tower. A plurality of melting burners 21 are installed at different angles, the tilt angle of the melting burner 21 can be adjusted , and the holding chamber 30 connected to the melting outlet 24 has a distance D1 between its upstream end and downstream end. Is the distance D2 between the side edges Also a short flat, substantially oval shape, the Thus also the melting chamber 20 is characterized in that not provided with other burners and cleaning port.

  The non-ferrous metal melting furnace 1 according to claim 1 includes a preheating tower 10, a melting chamber 20, and a holding chamber 30, and a plurality of burners are installed in the melting chamber 20 at different angles. By adjusting freely, all the melt | dissolution material of the melt | dissolution chamber 20 can be melt | dissolved uniformly uniformly. As a result, all the dissolved material can flow down to the holding chamber 30 without staying in the melting chamber 20. As a result, the side burner which has been conventionally required can be eliminated, and the equipment can be simplified and reduced in cost.

  Further, since the side burner can be dispensed with, it is not necessary to regularly clean the side burner, which has been conventionally required, and the backfire is not generated, so that the safety is excellent.

  In addition, since the burn-off burner and the cleaning port are not required, further simplification and cost reduction of the equipment can be achieved. Furthermore, since an opening portion called a cleaning port is not formed, the melting heat efficiency can be increased.

  The non-ferrous metal melting furnace 1 according to claim 2 exhibits the same effect as the invention according to claim 1. Further, since the melting burner 21 can be adjusted to change the inclination angle, the direction of the melting burner can be set in an optimum state according to the situation at that time. Further, since the holding chamber 30 has a plane substantially elliptical shape in which the distance D1 between the upstream end and the downstream end is shorter than the distance D2 between the side ends, the opening 32 provided at the downstream end to the dissolution chamber 20 is formed. The distance can be shortened without reducing the volume of the holding chamber 30.

  Accordingly, the melting chamber 20 can be easily cleaned by inserting a deckle from the opening 32, so that the conventional burn-off burner and the cleaning port of the melting chamber 20 which are conventionally required can be eliminated. As a result, it is possible to further simplify the equipment and reduce the cost.

It is a principal part sectional side view showing an embodiment of a nonferrous metal melting furnace concerning the present invention. It is a XX arrow line view of FIG. It is a rear view of the melting furnace shown in FIG. It is a side view which shows the different inclination of the some melting burner in the melting furnace shown in FIG. It is a side view which shows rotation of the melting burner in the melting furnace shown in FIG. It is a side view which shows the nonferrous metal melting furnace which concerns on a prior art example. It is a top view of the melting furnace shown in FIG.

  One embodiment of a non-ferrous metal melting furnace 1 according to the present invention is shown in FIGS. The non-ferrous metal melting furnace 1 is a tower-type continuous melting furnace that melts non-ferrous metals such as aluminum alloy, copper alloy, zinc, magnesium, nickel, lead, and tin, and includes a preheating tower 10, a melting chamber 20, and a holding chamber 30. Is provided.

The connection port 23 of the preheating tower 10 provided on the upper front side of the melting chamber 20 and the melting outlet 24 provided on the lower rear side of the melting chamber 20 are connected by a substantially L-shaped moving path 25 having a constant width F, A steep slope 26 that faces the tower connection port 23 and forms the front half of the movement path 25 and a gentle slope 27 that connects to the dissolution outlet 24 and forms the latter half of the movement path 25 are connected via a horizontal connection section 28; A melting burner in which the width F of the steep slope 26 and the gentle slope 27 is equal to the inner diameter E of the preheating tower 10 and the inclination angle can be adjusted to the downward inclined ceiling part 29 facing the upper part with the moving path 25 sandwiched between the connecting parts 28. 21 is installed.

  The preheating tower 10 has a substantially cylindrical shape arranged in the vertical direction, and includes a charging lid 11 at the upper end thereof. In a state where the charging lid 11 is released, the dissolved material is charged from the material charging device 40 provided immediately above the charging lid 11.

  The melting chamber 20 having no burn-off burner and no cleaning port is continuously provided without providing a side burner at the downstream end (lower end) of the preheating tower 10, and includes a plurality (three) of melting burners 21 on the upper wall thereof. . The plurality of melting burners 21 are installed toward portions where the melting material in the melting chamber flows down at different angles. The different angles include different angles (not shown) in the left-right direction in addition to different angles in the vertical direction (see FIG. 4). Note that each of the plurality of dissolution burners 21 can be swiveled (rotated). This turning includes turning up and down (see FIG. 5) and turning in the left and right direction (not shown).

  The holding chamber 30 is connected to the downstream end of the melting chamber 20 and includes a holding burner 31 on the upper wall thereof. An opening 32 is provided in the wall located at the downstream end of the holding chamber 30, and the opening 32 is opened and closed by an opening / closing door 33. The opening 32 is set to a size that allows a cleaning operation to be performed by inserting a deck. The holding chamber 30 has a planar substantially elliptical shape in which the distance D1 between the upstream end and the downstream end is set to be shorter than the distance D2 between the side ends (see FIG. 2).

  The nonferrous metal melting furnace 1 according to this embodiment operates as follows. First, a molten material such as an aluminum alloy is charged from the material charging device 40 to the preheating tower 10 with the charging lid 11 opened. The melted material put into the preheating tower 10 falls to the melting chamber 20 by its gravity while being preheated at the temperature of the preheating tower 10, where it is immediately heated by the flame radiated from the plural (three) melting burners 21. Dissolve. The combustion gas of the melting burner 21 is exhausted from the exhaust duct 50 to the outside of the furnace after heating the preheating tower 10.

  Since the plurality of melting burners 21 are installed at different angles, the charged melting materials can be uniformly heated and melted uniformly by adjusting the angles freely. In addition, by allowing a plurality of burners to be swiveled, it is possible to further uniformly dissolve the charged melting material.

  The melted material (molten metal) melted in the melting chamber 20 flows into the holding chamber 30 by flowing through the melting chamber 20 arranged in an inclined state by its own weight. The molten material (molten metal) is further heated by the holding burner 31 in this holding chamber 30 and heated. As a result, the melted material that is not completely melted is also melted to be in the molten metal state, passes through the hot water outlet 34 and reaches the adjacent front furnace 60. The exhaust gas of the holding burner 31 here also warms the preheating tower 10 and passes through the exhaust duct 50 and is discharged out of the furnace.

  A hot water temperature measuring unit 35 is provided in the vicinity of the hot water outlet 34, and the temperature of the molten material (molten metal) is measured by the hot water temperature measuring unit 35, and the heating power of the holding burner 31 is adjusted by the temperature.

The nonferrous metal melting furnace 1 according to this embodiment exhibits the following operational effects.
(A) Since a plurality of melting burners 21 are installed in the melting chamber 20 at different angles, all of the melting material can be uniformly melted uniformly and allowed to flow smoothly into the holding chamber 30. Thereby, since it is not necessary to provide a side burner, the simplification and cost reduction of equipment can be achieved. Moreover, since the backfire by a side burner does not generate | occur | produce, it is excellent in safety.

  In addition, by making each of the plurality of melting burners 21 adjustable in tilt angle and adjustable in turning, the dissolved material can be evenly and uniformly dissolved.

  (B) Since a side burner is not required, regular cleaning of the side burner, which has been required in the past, is unnecessary, and a backfire is not generated, resulting in excellent safety.

  (C) Since the holding chamber 30 has a substantially elliptical shape in a plane, the distance from the opening 32 provided at the downstream end to the dissolution chamber 20 can be shortened without reducing the volume of the holding chamber 30. Accordingly, the melting chamber 20 can be easily cleaned by inserting a deckle from the opening 32, so that the conventional burn-off burner and the cleaning port of the melting chamber 20 which are conventionally required can be eliminated. As a result, simplification and cost reduction of the equipment can be further promoted.

  (D) Since no cleaning port is provided in the melting chamber 20, the number of openings can be reduced. Thereby, melting | dissolving heat efficiency can be improved.

  (E) Since the width F of the floor surface of the moving path 25 is constant, the design and manufacture are easy. If the horizontal width F of the moving road floor is constant and matches the inner diameter E of the preheating tower 10, the design and manufacture becomes easier.

DESCRIPTION OF SYMBOLS 1 Nonferrous metal melting furnace 10 Preheating tower 11 Loading lid 20 Melting chamber 21 Melting burner 23 Connection port 24 Melting outlet 25 Moving path 26 Steep slope 27 Slow slope 28 Connection part 29 Downward inclined ceiling part 30 Holding chamber 31 Holding burner 32 Opening 33 Opening / closing door 34 Hot water outlet 35 Hot water temperature measurement unit 40 Material input device 50 Exhaust duct 60 Fore furnace 70 Nonferrous metal melting furnace 71 Tower 72 Tower lid 73 Melting chamber 74 Melting burner 75 Holding chamber 76 Holding burner 77 Outlet port 78 Side burner 79 Opening Part 80 Burn-off burner 81 Cleaning port D1 Distance between upstream end and downstream end D2 Distance between side ends E Inner diameter F Horizontal width

Claims (2)

The connection surface (23) of the preheating tower (10) provided near the upper front side of the melting chamber (20) and the melting outlet (24) provided on the lower rear side of the melting chamber are substantially L with a constant lateral width F. A steep slope (26) that forms a front half of the movement path (25) facing the tower connection port and a gentle slope (27) that forms a latter half of the movement path connected to the dissolution outlet. A plurality of melting burners (21) are installed at different angles on the downward inclined ceiling portion (29) connected via the connecting portion (28) and facing the connecting portion via the moving path , and the melting is performed. The holding chamber (30) connected to the outlet has a substantially oval shape in which the distance (D1) between the upstream end and the downstream end is shorter than the distance (D2) between the side ends. A non-ferrous metal melting furnace characterized by having no opening. The floor of the connecting port (23) of the preheating tower (10) provided on the upper front side of the melting chamber (20) and the melting outlet (24) provided on the lower rear side of the melting chamber have a constant width (F). Connected by a substantially L-shaped moving path (25), facing the tower connection port (23) and forming the first half of the moving path (25) and the steep slope (26) and the dissolution outlet (24) form the latter half of the moving path to gentle slope (27) connects the connecting part via a (28), and a steep and gentle slope of the horizontal width (F) equal to the preheating tower of inner diameter (E), through a movement path relative to the connecting portion A plurality of melting burners (21) are installed at different angles on the downwardly inclined ceiling part (29) facing each other, and the melting burner (21) can be adjusted to change the inclination angle and connected to the melting outlet. The distance (D1) between the upstream end and the downstream end of the holding chamber (30) is the side end. And the distance (D2) shorter flat, substantially oval shape than, non-ferrous metal melting furnaces, characterized in that, characterized in that provided with no other burner and cleaning ports to be melting chamber Thus.

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