JPH0114675Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an aluminum melting furnace for melting materials to be melted such as waste cans and punching scraps.

As shown in FIG. 1, the conventional melting furnace has a furnace 1 divided by a partition wall 2 into a melting chamber 3 and a holding chamber 4, and the melting chamber 3 is provided with an opening/closing door 5 and a melting burner 6. The holding chamber 4 is provided with an exhaust gas outlet 7 and a holding burner 8, and an incinerator 9 is provided with an incinerator 1 in an incinerator 9, which is arranged so that the upper portions of both the chambers 3 and 4 communicate with each other.
0 is provided, the opening/closing door 5 is opened, waste cans, punching scraps, and other materials to be melted are put in, and the melting burner 6 raises humidity and melts the C _n H _o generated during melting.
Gas, soot, and the like are introduced into an incinerator 9, heated to a required temperature by an incinerator burner 10, and the C _n H _o gas and soot are combusted, and the treated combustion gas is retained. The exhaust gas inside the furnace is discharged from the gas outlet 7 by an exhaust fan (not shown), etc., but since the material to be melted is intermittently introduced through the opening/closing door 5, a large amount of outside air is melted through the opening/closing door 5. The low-temperature air that flows into the chamber 3 lowers the temperature inside the furnace, which increases the firing rate of the melting burner 6 and increases the temperature of the incinerator 9.
However, the incineration burner 10 inevitably becomes larger and the amount of heat generated by the incineration burner 10 also increases, resulting in disadvantages such as an increase in equipment.

Therefore, in order to eliminate the above drawbacks, this invention
To reduce the amount of combustion of a melting burner, reduce the amount of combustion of an incineration burner, and downsize an incinerator device by preventing atmospheric gas in the furnace from flowing out due to the inflow of outside air when materials to be melted are introduced into the furnace. Our goal is to provide aluminum melting furnaces that can

Another object of the present invention is to provide an aluminum melting furnace that can preheat the materials to be melted into the furnace to further reduce the amount of combustion described above and also reduce the amount of combustion of the holding burner. be.

Next, an embodiment of the present invention will be described with reference to FIG. Note that the same reference numerals are given to the corresponding members in FIG.

In this embodiment, instead of the opening/closing door 5 of the conventional example, a charging device 11, for example, a screw conveyor, is arranged to charge the material to be melted while isolating the inside of the melting chamber 3 from the outside air, and the charging device 11 is installed in a furnace. Pressure chamber 12 on the side
Furnace atmosphere gas is forced into this pressure chamber 12 through a nozzle 14 by a circulation blower 13 connected to the holding chamber 4, and this nozzle 14 is set to be inclined toward the melting chamber 3 side.

With the above configuration, the material to be melted transferred from the charging device 11 to the melting chamber 3 side is preheated in advance with the furnace atmosphere gas of the circulation blower 13, and the material to be melted is transported by the charging device 11. is fed into the melting chamber 3 continuously or intermittently, and since outside air does not flow into the melting chamber 3 during this feeding, the furnace temperature inside the melting chamber 3 does not drop and the material to be melted is Since the melting burner 6 is preheated in advance, the amount of heat generated by the melting burner 6 can be reduced, and since the temperature drop of the molten metal in the melting chamber 3 is also small, the amount of heat generated by the holding burner 8 in the holding chamber 4 is also reduced. Furthermore, the gas transferred to the incinerator 9 includes the exhaust gas for isolating the in-furnace atmosphere gas and the outside air, which is force-fed by the circulation blower 13, the amount of combustion gas from the melting burner 6, and the amount of C _n H _o generated when melting the materials to be melted. The combustion in the incinerator burner 10 installed in the incinerator 9 is stable due to the closed operation, which uses a mixed gas _of gas and _soot and shuts off the air inside and outside the furnace. Even if the amount of C _n H _O and soot generated in the processing gas is the same as in the conventional case, there is no infiltrated air, so less processing gas is needed to raise the temperature.
The amount of combustion of the incineration burner 10 can be small.

As described above, the present invention provides a charging device 11 that can charge materials to be melted into the melting chamber 3 on one side wall surface of the melting chamber 3 of the furnace 1 while separating the furnace atmosphere gas from the outside air.
is installed, a pressure chamber 12 is provided in the charging device 11,
In the pressure chamber 12, a circulation blower 13 connected to the holding chamber 4 is used to forcefully feed furnace atmosphere gas through a nozzle 14, and the material to be melted is preheated before being charged into the melting chamber 3. Since it is related to a furnace, atmospheric gas is pumped in the pressure chamber 12 at the tip of the charging device 11 at a pressure higher than the external pressure outside the furnace and the atmospheric pressure inside the furnace even when the material to be melted is charged. The inflow of outside air and the outflow of atmospheric gas inside the furnace can be prevented, and the temperature inside the furnace will not drop. In addition, since there is no inflow of outside air, there is no oxidation, and oxides do not float on the surface of the molten metal, so the surface of the molten metal can be maintained in a clean state, improving yield and melting efficiency.

Furthermore, since the atmospheric gas is circulated and the melted material is preheated before being conveyed and introduced, the amount of combustion of the melting burner 6 is small, the temperature drop of the melt is also small, and the holding chamber 4
The amount of combustion of the holding burner 8 can also be reduced, and the incinerator apparatus can be downsized.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional example, and FIG. 2 is a sectional view showing an embodiment of the present invention. 1... Furnace, 3... Melting chamber, 11... Feeding device,
12...Pressure chamber.

Claims (1)

[Scope of utility model registration request] A charging device 11 is installed on one side wall of the melting furnace 3 of the furnace 1 and is capable of charging the material to be melted into the melting chamber 3 while separating the furnace atmosphere gas from the outside air.
A pressure chamber 12 is provided in the pressure chamber 12, and a circulating blower 13 connected to the holding chamber 4 pumps the furnace atmosphere gas through a nozzle 14 to preheat the material to be melted while supplying it to the melting chamber 3. An aluminum melting furnace characterized in that the aluminum is charged into the furnace.