JP4348166B2 - Rotary crucible furnace - Google Patents

Description

  The present invention relates to a rotary crucible furnace that is heated by a regenerative burner to melt metal.

Conventionally, a stationary crucible furnace in which a crucible is installed in a furnace body through a combustion space and a regenerative burner that heats the crucible by burning the furnace body in the combustion space is known (for example, a patent) (Refer to the prior art shown in FIGS. 4 and 5 of Document 1). Since this crucible furnace uses a regenerative burner, it can be heated efficiently by recovering exhaust heat in the heat storage material of the heat storage tank and preheating the combustion air.
JP-A-10-54667

  Although the said crucible furnace is a thing with good thermal efficiency by heating with a regenerative burner, there exists a problem that taking out of a molten metal is inconvenient for a stationary type. In addition, in order to use a regenerative burner, it is necessary to provide a large-capacity heat storage tank, but in the case of a stationary crucible furnace, it is attached to the side of the furnace body so as to protrude sideways, and the heat storage tank is located on the side. There was a problem that the projecting space greatly protruded and the work space was narrowed.

  The present invention has been invented in view of the above-described conventional problems, and even when heated by a regenerative burner, the molten metal can be taken out from the crucible by rotating and tilting the furnace body, and the molten metal can be taken out. It is an object of the present invention to provide a rotary crucible furnace that can be easily made, and that can effectively provide a heat storage tank by effectively using the space and does not take up space for installation or reduce the work space. It is.

  In order to solve the above problems, a rotary crucible furnace according to the present invention includes a crucible 3 provided in a furnace body 1 through a combustion space 2 and the furnace body 1 is burned in the combustion space 2 so that the crucible 3 is formed. The furnace body 1 is mounted so that the regenerative burner A to be heated is attached, and the opening of the crucible 3 is normally in an upright posture with the opening directly above and the opening of the crucible 3 is inclined to the side when the molten metal 4 is taken out. A heat storage tank 5 that is supported so as to be rotationally driven and loaded with the heat storage material 6 of the regenerative burner A is integrally provided below the lower surface of the furnace body 1.

  By configuring as described above, the furnace body 1 can be rotationally driven so that the opening of the crucible 3 is inclined to the side when the molten metal 4 is taken out even if heated by the regenerative burner A. Thus, the molten metal 4 can be easily taken out. In addition, by providing the heat storage tank 5 integrally below the lower surface of the furnace body 1, the heat storage tank 5 can be provided by utilizing the space below the furnace body 1 that can be configured to rotate the furnace body 1. In addition, as compared with the conventional example in which the heat storage tank 5 protrudes to the side as in the above-described conventional example, the installation space is not required and the work space is not reduced.

  In the present invention, even when heated using a regenerative burner as described above, the molten metal can be taken out from the crucible by driving the furnace body so that the opening of the crucible becomes an inclined posture facing sideways. There is an effect that it becomes easy, and it can be provided so that the heat storage tank does not protrude to the side by using a structure in which the furnace body is rotationally driven, so that there is no space for installation and the work space is not narrowed There is.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  First, the basic structure of the rotary crucible furnace will be described with reference to FIGS. A crucible 3 is housed inside the furnace body 1 via a combustion space 2, and a pair of regenerative burners A are attached to the furnace body 1. The pair of regenerative burners A has a heat storage tank 5 filled with a burner body 10 and a heat storage material 6, respectively.

  The pair of regenerative burners A includes a burner body 10 facing the upper part of the combustion space 2 and a burner body 10 facing the lower part of the combustion space 2. Reference numeral 16 denotes a fuel supply pipe for supplying fuel to the burner body 10, and reference numeral 17 denotes a fuel switching valve. The heat storage tank 5 is integrally attached to the furnace body 1, and the heat storage tank 5 is filled with a ball-shaped heat storage material 6. The upper surface side of the heat storage tank 5 and the combustion space 2 in the furnace body 1 are communicated with each other through a communication path 7. The end portions of the communication path 7 of the pair of regenerative burners A include those facing the upper portion of the combustion space 2 and those facing the lower portion of the combustion space 2. The lower surface side of the heat storage tank 5 communicates with the intake and exhaust blowers 12 via the switching valve device 11.

  The pair of regenerative burners A are alternately burned. When the upper burner body 10 burns, the lower burner body 10 burns downward so that a flame is formed in a spiral shape. When combusting, it burns upward so that a flame is formed in a spiral. When one regenerative burner A burns, exhaust heat of exhaust gas is recovered in the heat storage material 6 of the other regenerative burner A, and combustion air when the other regenerative burner A burns next Used for preheating. As a result, exhaust heat can be recovered and burned efficiently.

  The furnace body 1 rotatably supports the side of the furnace body 1 on which the regenerative burner A is provided so that the upper end portion on the opposite side becomes the rotation shaft 13, and is rotatable up and down around the rotation shaft 13. It has become. The furnace body 1 is driven up and down by an up and down drive body 14 such as a jack that is driven up and down. Normally, as shown in FIG. 1B, the furnace body 1 is held in a lowered state, and in this state, the opening of the crucible 3 is held in an upright posture facing right above. In this upright posture, the metal to be melted is put into the crucible 3, the regenerative burner A is burned, the crucible 3 is heated, and the metal in the crucible 3 is melted. When the molten metal 4 is taken out, the furnace body 1 is raised by the elevating drive body 14, and is rotated around the rotating shaft 13 as shown in FIG. When the furnace body 1 is thus inclined, the molten metal 4 in the crucible 3 is caused to flow out through the take-out port 18, and the molten metal 4 is received by the fishing bottle 15. In order to take out all the molten metal 4 in the crucible 3, the furnace body 1 is inclined to a position where the furnace body 1 is rotated at an angle of about 95 ° at the maximum from the horizontal state.

  The rotary crucible furnace provided with the regenerative burner A is formed as described above. In the present invention, the heat storage tank 5 in which the heat storage material 6 is loaded is provided as follows. Since the furnace body 1 is supported so as to rotate about the rotating shaft 13, a space is formed below the furnace body 1 in an upright posture. In order to provide the heat storage tank 5 using this space, FIG. (A) As shown in (b), the heat storage tank 5 is provided integrally below the lower surface of the furnace body 1.

  4 (a) and 4 (b) are those in which the heat storage tank 5 is integrally provided so as to protrude sideways on the side surface of the furnace body 1 as in the prior art, and when the heat storage tank 5 is provided in this way, The large-capacity heat storage tank 5 protrudes to the side and takes up space for installing the rotary crucible furnace and reduces the work space. However, as shown in FIGS. When the heat storage tank 5 is provided, the heat storage tank 5 does not protrude sideways from the furnace body 1, so that such adverse effects do not occur.

It is a figure for demonstrating the structure of the rotary crucible furnace of this invention, Comprising: (a) is sectional drawing seen from the plane, (b) is sectional drawing seen from the front of an upright state. It is sectional drawing seen from the front of the state which is made to incline same as the above and the molten metal is taken out. (A) is sectional drawing seen from the plane which shows an example of the principal part of this invention, (b) is sectional drawing seen from the front of (a). (A) It is sectional drawing seen from the plane of the prior art for a comparison, (b) is sectional drawing seen from the front of (a).

Explanation of symbols

A Regenerative burner
DESCRIPTION OF SYMBOLS 1 Furnace body 2 Combustion space 3 Crucible 4 Molten metal 5 Thermal storage tank 6 Thermal storage material

Claims (1)

The furnace body is equipped with a crucible through a combustion space, and a regenerative burner that heats the crucible by burning in the combustion space is mounted on the furnace body, and usually has an upright posture with the crucible opening facing directly above and When removing the molten metal, support the furnace body so that the opening of the crucible is inclined so that it is inclined to the side, and support the heat storage tank loaded with the heat storage material of the regenerative burner below the lower surface of the furnace body. A rotary crucible furnace provided integrally.

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