JP2014070890A - Aluminum melting holding furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aluminum melting holding furnace in which exhaust gas does not occur because of not using a gas burner, and which is excellent in thermal efficiency and can be conveniently used as a stationary type.SOLUTION: An aluminum melting holding furnace includes: an outer tank 3 comprising a heat insulation refractory material; an inner tank 5 arranged so as to have a space 7 between the outer tank 3 and itself and comprising a heat insulation refractory material; a high output electric heater 8 arranged in the space 7; and an immersion electric heater 12 arranged in the inner tank 5. An aluminum ingot, which is conveyed in the inner tank 5, is melted by heating of the high output electric heater 8, and melting aluminum in the inner tank 5 is held by heating of the immersion electric heater 12.

Description

  The present invention relates to an aluminum melting and holding furnace.

  In the aluminum forming factory, as shown in FIG. 3, a melting furnace 100 for melting aluminum ingot, a holding furnace 101 for holding the molten aluminum in a predetermined melting state, a die cast machine 102 for forming aluminum, Is provided. Usually, one large melting furnace 100 is provided by built-in with a refractory, and a plurality of holding furnaces 101 and die cast machines 102 are provided in a form adjacent to each other. Then, the aluminum melted in the melting furnace 100 is transferred and held in each holding furnace 101 by a forklift or the like, and the molten aluminum is supplied from each holding furnace 101 to each corresponding die cast machine 102 to perform molding.

  In the above aluminum forming factory, a gas burner is used as a heat source for both the melting furnace and the holding furnace, so that exhaust gas is generated, which is unfavorable for the environment. Furthermore, it takes much time to install the melting furnace, and when a specific holding furnace fails or is stopped due to maintenance, there is a problem that the corresponding die casting machine cannot be used.

  The present invention has been made in view of the above circumstances, and does not require a conventional built-in melting furnace. By not using a gas burner, there is no generation of exhaust gas, excellent thermal efficiency, and can be conveniently used as a stationary type. An object is to provide an aluminum melting and holding furnace.

  In this invention, an outer tub made of heat-insulating refractory material, an inner tub made of heat-insulating refractory material disposed through a space between the outer tub, a high-output electric heater disposed in the space, An immersion electric heater disposed in the inner tank, and melting the aluminum ingot carried into the inner tank by heating the high-power electric heater, and dissolving the inner tank by heating the immersion electric heater Provided is an aluminum melting and holding furnace characterized by holding aluminum.

  The aluminum melting and holding furnace having the above-described configuration is one in which an aluminum ingot is melted by heating a high-power electric heater in the inner tank, and the molten aluminum is held in a molten state by heating an immersion electric heater. A function is provided, and the function is performed by heating an electric heater without using a gas burner. Accordingly, there is no generation of exhaust gas, and accordingly, heat energy is not wasted.

  In addition, since the outer shape of the aluminum melting and holding furnace is formed by the outer tank, it can be easily manufactured and moved in a stationary type.

  Both the melting and holding performances are kept good by being configured with the temperature control mechanism, and the movement is made by having a moving means such as casters of the aluminum melting / holding furnace on the lower surface. Made easy.

  Recently, molding of small aluminum products used for precision equipment has become widespread, and in that case, a large amount of aluminum is not required. It is hoped that it will be done. The aluminum melting and holding furnace of the present invention can be suitably adapted to such a manufacturing environment in that an electric heater is used instead of a large melting furnace.

  By using the aluminum melting and holding furnace of the present invention, it is possible to omit the labor-consuming production of the aluminum melting furnace. In addition, exhaust gas is not generated, and aluminum products can be formed using a die-cast machine without wasting thermal energy. Furthermore, since the aluminum melting and holding furnace can be moved, it can be conveniently used by moving to an unsupported die casting machine.

  Configuration diagram of the aluminum melting and holding furnace of the present invention   Schematic layout of an aluminum molding plant that uses the aluminum melting and holding furnace of the present invention   Layout diagram of an aluminum molding plant that uses a conventional aluminum melting furnace

  FIG. 1 is a sectional view of an aluminum melting and holding furnace according to the present invention. The aluminum melting and holding furnace 1 has a square shape in plan view, and 3 and 5 are an outer tank and an inner tank made of a heat insulating refractory material. A spacer 6 made of a heat-insulating refractory material is provided on the upper surface of the bottom 4 of the outer tub 3, and an inner tub 5 having a planar outer shape smaller than the outer tub 3 is placed on the spacer 6. A space 7 is formed between the tank 5 and the tank 5. A high-power electric heater 8 is arranged so as to circulate throughout the space 7. As the high-power electric heater 8, a silicon carbide heating element heater is used.

  An iron protective cover sheet 9 is attached to the entire outer surface of the outer tub 3. The aluminum melting and holding furnace 1 has a planar shape of 200 cm × 200 cm square and a height of 180 cm. Four casters 10 are attached to the bottom surface of the bottom 4 of the outer tub 3.

  12 is an immersion electric heater for maintaining the molten state of aluminum, and 13 is a thermocouple device as a temperature control mechanism. The immersion electric heater 12 includes an L-shaped wiring portion 15 in which wiring is made in an outer wall portion made of a refractory, and a heater portion 16 in which a heater wire 19 is disposed in a protective tube.

  FIG. 2 is a schematic layout diagram of an aluminum molding plant in which the aluminum melting and holding furnace 1 is used. Each of the aluminum melting and holding furnaces 1 is arranged adjacent to each of a plurality of die-casting machines 20. Does not exist.

  The aluminum ingot is melted by being put into the aluminum ingot in the inner tank 5 of the aluminum melting and holding furnace 1 and operating the high-power electric heater 8 to be heated to about 1400 ° C. The melted aluminum is maintained in the melted state by operating the immersion electric heater 12 and being continuously heated at about 600 ° C., and is appropriately supplied to the adjacent die cast machine 20 to perform aluminum molding. The temperature control during the above-described melting and holding operations is precisely performed by the high-power electric heater 8 and the immersion electric heater 12 performing the heating operation based on the temperature detection signal from the thermocouple device 13. Since both the above melting and holding operations are performed using an electric heater, exhaust gas is not generated and thermal efficiency is improved.

  The aluminum melting and holding furnace 1 can be easily moved by providing the caster 10. For example, in FIG. 2, when the aluminum melting and holding furnace 1 in FIG. The melting and holding furnace 1 can be moved adjacently to supply the molten aluminum to the C die-casting machine 20, so that the C die-casting machine 20 can be used for molding without stopping.

1 Aluminum melting and holding furnace 3 Outer tank 5 Inner tank 7 Space 8 High power electric heater 12 Immersion electric heater

Claims (3)

An outer tank made of heat-insulating refractory material, an inner tank made of heat-insulating refractory material arranged through a space between the outer tanks, a high-power electric heater arranged in the space, and arranged in the inner tank An immersion electric heater,
An aluminum melting and holding furnace for melting an aluminum ingot carried into the inner tank by heating the high-power electric heater and holding the molten aluminum in the inner tank by heating the immersion electric heater .   The aluminum melting and holding furnace according to claim 1, further comprising a temperature control mechanism.   The aluminum melting furnace according to claim 2, further comprising a means for moving the aluminum melting and holding furnace on a lower surface.

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