Improved aluminum alloy melting furnace

Abstract

This invention relates to an improved aluminum alloy melting furnace, comprising: a main heating chamber for heating and containing molten aluminum; and a charging auxiliary chamber, the charging auxiliary chamber including a first preheating device and a first flue; the first preheating device is equipped with a baking platform for baking and preheating bulk scrap aluminum containing a small amount of oil and coating; the first flue connects the first preheating device and the main heating chamber, for sending the flue gas generated during preheating to the main heating chamber for combustion. Through the above configuration, the problem of oil in scrap aluminum igniting and burning to form oxide slag, corroding the furnace, and causing a decline in the quality of molten aluminum during current aluminum alloy processing can be solved.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy processing technology, and more specifically to an improved aluminum alloy melting furnace. Background Technology

[0002] As my country's recycled aluminum industry continues to grow and expand, the types of aluminum waste are becoming increasingly complex, making aluminum processing technology more intricate. At the same time, in response to the national call for environmental protection and energy conservation, there is a growing demand for more advanced aluminum processing technologies to meet both industry needs and environmental requirements.

[0003] Generally, aluminum materials include bulk scrap aluminum containing a small amount of oil and coating, as well as baled scrap aluminum containing a large amount of oil or coating.

[0004] Currently, aluminum alloy melting furnaces and other aluminum processing furnaces are typically double-chamber furnaces, consisting of a main heating chamber and a charging chamber. Aluminum scrap is added through the charging chamber door into the furnace chamber for melting and processing. However, the scrap is not adequately preheated. After being pushed into the molten pool, it floats on the surface of the molten aluminum. Unbaked oil contaminants in the scrap can ignite and burn at high temperatures, rapidly forming aluminum oxide burn-off products and creating a large amount of scum on the surface. This scum corrodes the refractory material structure in the furnace chamber, leading to damage to the furnace lining. Simultaneously, untreated burn-off contaminants and impurities become trapped in the molten aluminum, severely affecting its quality. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide an improved aluminum alloy melting furnace to solve the current problem that oil stains in waste aluminum during aluminum alloy processing can ignite and burn, forming oxide slag, corroding the furnace chamber, and causing a decline in the quality of molten aluminum.

[0006] To achieve one of the above-mentioned objectives, one embodiment of the present invention provides an improved aluminum alloy melting furnace, comprising:

[0007] The main heating chamber is used to heat and contain molten aluminum;

[0008] The sub-compression chamber includes a first preheating device and a first flue. The first preheating device is equipped with a baking platform for baking and preheating bulk waste aluminum containing a small amount of oil and coating. The first flue connects the first preheating device and the main heating chamber, and is used to send the flue gas generated during preheating to the main heating chamber for incineration.

[0009] As a further improvement of one embodiment of the present invention, the feeding chamber further includes a first circulating fan, which is disposed in the first flue and is used to draw the preheated flue gas to the heating main chamber.

[0010] As a further improvement of one embodiment of the present invention, the main heating chamber is provided with a main heating chamber flue for discharging exhaust gas after incineration.

[0011] As a further improvement of one embodiment of the present invention, the melting furnace further includes an aluminum liquid circulation device, which connects the main heating chamber and the auxiliary feeding chamber to circulate the molten aluminum in the two chambers and melt aluminum chips.

[0012] As a further improvement of one embodiment of the present invention, the aluminum liquid circulation device includes a circulation pump and a pump pipe: the pump pipe connects the heating main chamber and the feeding auxiliary chamber; the circulation pump is located in the pump pipe and is used to draw aluminum liquid so that the aluminum liquid circulates.

[0013] As a further improvement of one embodiment of the present invention, a first aluminum liquid circulation channel is provided between the heating main chamber and the feeding auxiliary chamber for direct flow of molten aluminum.

[0014] As a further improvement of one embodiment of the present invention, the heating main chamber also includes a heating main chamber furnace door located on the side wall, the opening of the heating main chamber furnace door facing outward.

[0015] As a further improvement of one embodiment of the present invention, the feeding chamber further includes a feeding chamber furnace door located on the side wall, the opening of the feeding chamber furnace door facing outward.

[0016] As a further improvement of one embodiment of the present invention, the melting furnace further includes a third charging chamber, which is located in the auxiliary charging chamber, and the heating temperature in the third charging chamber is lower than the heating temperature in the auxiliary charging chamber;

[0017] The feeding chamber includes a second preheating device, a second flue, and a second circulating fan. The second preheating device is used to fully bake and preheat the waste aluminum bales containing a large amount of oil or coating from top to bottom. The second flue connects the second preheating device and the main heating chamber. The second circulating fan is located in the second flue and is used to draw the pyrolysis flue gas generated by baking the waste aluminum bales to the main heating chamber for incineration.

[0018] As a further improvement of one embodiment of the present invention, a second aluminum liquid circulation channel is provided between the feeding sub-chamber and the feeding third chamber for direct flow of molten aluminum.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the aluminum alloy melting furnace includes a main heating chamber and a charging auxiliary chamber; a first preheating device is provided in the charging auxiliary chamber, which is equipped with a baking platform, which can be used to bake and preheat bulk waste aluminum containing a small amount of oil and coating; at the same time, the first preheating device and the main heating chamber are connected by a first flue, which is used to send the flue gas generated by preheating to the main heating chamber for combustion; through the above arrangement, the small amount of easily combustible oil and coating substances in the bulk waste aluminum can be preheated, removed and incinerated in the form of flue gas, thereby avoiding the formation of aluminum oxides in the aluminum liquid as slag, further avoiding the corrosion of the refractory material structure and the resulting furnace damage, and at the same time improving the quality of the aluminum liquid. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a cross-sectional structural schematic diagram of an aluminum alloy melting furnace according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the aluminum alloy melting furnace in one embodiment of the present invention.

[0023] The reference numerals used in the attached figures are as follows:

[0024] Auxiliary charging chamber 1, auxiliary charging chamber furnace door 15, third charging chamber 2, second flue 21, third charging chamber furnace door 25, gas sealing device 26, main heating chamber 3, main heating chamber furnace door 35, aluminum liquid circulation device 4, pump pipe 41, first aluminum liquid circulation channel 51, second aluminum liquid circulation channel 52. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0026] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] like Figures 1 to 2As shown, an embodiment of the present invention provides an improved aluminum alloy melting furnace, comprising:

[0028] Heating chamber 3 is used to heat and contain molten aluminum;

[0029] The feeding chamber 1 includes a first preheating device and a first flue. The first preheating device is equipped with a baking platform for baking and preheating bulk waste aluminum containing a small amount of oil and coating. The first flue connects the first preheating device and the main heating chamber 3, and is used to send the flue gas generated by preheating to the main heating chamber 3 for incineration.

[0030] Specifically, the aluminum alloy melting furnace includes a main heating chamber 3 and a charging auxiliary chamber 1. A first preheating device is installed in the charging auxiliary chamber 1, which is equipped with a baking platform for baking and preheating bulk waste aluminum containing a small amount of oil and coating. At the same time, the first preheating device and the main heating chamber 3 are connected by a first flue to send the flue gas generated during preheating to the main heating chamber 3 for combustion. Through the above configuration, the small amount of flammable oil and coating in the bulk waste aluminum can be preheated, removed and incinerated in the form of flue gas, thereby avoiding the formation of aluminum oxides and slag in the molten aluminum, further preventing the corrosion of the refractory material structure and the resulting furnace damage, and simultaneously improving the quality of the molten aluminum.

[0031] Furthermore, the feeding chamber 1 also includes a first circulating fan, located in the first flue, used to draw the preheated flue gas to the heating main chamber 3.

[0032] Furthermore, the main heating chamber 3 is equipped with a main heating chamber 3 flue for discharging exhaust gas after combustion.

[0033] In actual use, the first circulating fan can quickly transport the flue gas to the heating main chamber 3, which is equipped with a heating main chamber 3 flue. After the flue gas is burned in the heating main chamber 3, it is basically removed, and the remaining exhaust gas can be discharged from the heating main chamber 3 flue, thereby achieving zero emissions of pollutants.

[0034] Furthermore, the melting furnace also includes an aluminum liquid circulation device 4, which connects the heating main chamber 3 and the charging auxiliary chamber 1 to circulate the molten aluminum in the two chambers and melt aluminum chips.

[0035] In this way, the molten aluminum circulates between the main heating chamber 3 and the feeding chamber 1. The high-temperature molten aluminum can further melt the aluminum shavings remaining in the feeding chamber 1, thereby effectively utilizing thermal energy and reducing energy consumption.

[0036] Furthermore, the aluminum liquid circulation device 4 includes a circulation pump and a pump pipe 41; the pump pipe 41 connects the heating main chamber 3 and the feeding auxiliary chamber 1; the circulation pump is located in the pump pipe 41 and is used to draw aluminum liquid so that the aluminum liquid circulates.

[0037] In practical use, the circulating pump can quickly extract molten aluminum and achieve rapid circulation, thereby improving processing efficiency and further enhancing the utilization rate of energy consumption such as heat.

[0038] Furthermore, a first aluminum liquid circulation channel 51 is provided between the heating main chamber 3 and the feeding auxiliary chamber 1 for direct circulation of molten aluminum.

[0039] Furthermore, a second aluminum liquid circulation channel 52 is provided between the charging auxiliary chamber 1 and the charging third chamber 2 for direct circulation of aluminum liquid.

[0040] In practical use, molten aluminum can flow directly in both the first molten aluminum circulation channel 51 and the second molten aluminum circulation channel 52, which accelerates the circulation of molten aluminum, heat exchange or transfer, and at the same time ensures the pressure balance of each furnace chamber of the melting furnace and ensures the stability of the entire device.

[0041] Furthermore, the melting furnace also includes a charging chamber 2, which is located in the charging auxiliary chamber 1, and the heating temperature in the charging chamber 2 is lower than the heating temperature in the charging auxiliary chamber 1;

[0042] The feeding chamber 2 includes a second preheating device, a second flue 21, and a second circulating fan; the second preheating device is used to fully bake and preheat the waste aluminum bales containing a large amount of oil or coating from top to bottom; the second flue 21 connects the second preheating device and the main heating chamber 3, and the second circulating fan is located in the second flue 21 to draw the pyrolysis flue gas generated by baking the waste aluminum bales to the main heating chamber 3 for incineration.

[0043] In practical use, a third feeding chamber 2 is added to the feeding auxiliary chamber 1. The temperature of the third feeding chamber 2 is lower than that of the feeding auxiliary chamber 1, which facilitates the preheating of waste aluminum baled blocks containing a large amount of oil or coating. The third feeding chamber 2 includes a second preheating device and a second flue 21. The second flue 21 connects the second preheating device and the heating main chamber 3, and is used to send the pyrolysis flue gas generated by baking the waste aluminum baled blocks in the second preheating device to the heating main chamber 3 for incineration.

[0044] Therefore, waste aluminum bales containing a large amount of oil or coating can be preheated, and flammable substances such as oil or coating can be removed and incinerated in the form of pyrolysis flue gas. This avoids the formation of aluminum oxides in the molten aluminum as scum, further preventing the erosion of the refractory material structure and the resulting furnace damage, while also improving the quality of the molten aluminum.

[0045] Furthermore, the feeding chamber 2 also includes a feeding chamber furnace door 25 and a gas sealing device 26. The gas sealing device 26 is located at the feeding chamber furnace door 25 and is used to prevent the leakage of pyrolysis flue gas.

[0046] This effectively prevents the leakage of pyrolysis flue gas, thus avoiding potential health damage to personnel or accidental pollution emissions.

[0047] Furthermore, the heating main chamber 3 also includes a heating main chamber furnace door 35 located on the side wall, with the opening of the heating main chamber furnace door 35 facing outward.

[0048] o

[0049] Furthermore, the feeding chamber 1 also includes a feeding chamber furnace door 15 located on the side wall, with the opening of the feeding chamber furnace door 15 facing outward.

[0050] In this way, staff can easily perform processing operations such as adding materials to the main heating chamber 3 or the auxiliary feeding chamber 1.

[0051] Furthermore, the furnace door 25 for the three charging chambers is located at the top of the three charging chambers 2 and faces upwards.

[0052] Furthermore, the melting furnace also includes an automatic feeding device located above the furnace door 25 of the three feeding chambers.

[0053] In this way, aluminum scrap can be easily fed into the melting furnace through feeding devices and other means, and automatically fed under gravity. At the same time, different types of scrap, such as bulk aluminum scrap with a small amount of oil and coating, and baled aluminum scrap with a large amount of oil or coating, can be fed into different furnace chambers for processing to improve processing efficiency.

[0054] Meanwhile, an automatic feeding device is installed above the feeding chamber 2, which can realize large-scale rapid feeding, thereby further improving processing efficiency.

[0055] In summary, in the embodiments of the present invention, the waste is preheated in different furnaces according to the different contents of oil and coating in the waste, and the preheating temperature of the different furnaces is different.

[0056] Specifically, a first preheating device is installed in the feeding auxiliary chamber 1, where bulk waste aluminum containing a small amount of oil and coating is preheated on the baking platform of the first preheating device, and the flue gas generated by preheating is sent to the main heating chamber 3 for incineration; a third feeding chamber 2 is added to the feeding auxiliary chamber 1, where waste aluminum baled blocks containing a large amount of oil or coating are preheated in the second preheating device of the third feeding chamber 2, and the pyrolysis flue gas generated by baking is sent to the main heating chamber 3 for incineration.

[0057] This effectively preheats different types of flammable substances such as oil stains and coatings into gas, and sends all the gas into the main feeding chamber for incineration. This effectively removes different types of flammable substances from the waste aluminum, preventing them from burning and producing oxides. Ultimately, this reduces the burn-off caused by rapid aluminum oxidation, reduces the corrosion damage to the furnace lining, and improves the quality of the molten aluminum, enabling it to meet the environmental emission requirements of industrial exhaust gas.

[0058] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0059] The detailed descriptions listed above are merely specific descriptions of feasible implementations of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent implementations or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. An improved aluminum alloy melting furnace, characterized in that, include: The main heating chamber is used to heat and contain molten aluminum; and a feeding chamber, the feeding chamber including a first preheating device and a first flue; The first preheating device is equipped with a baking platform for baking and preheating bulk waste aluminum containing a small amount of oil and coating; the first flue connects the first preheating device and the main heating chamber, and is used to send the flue gas generated during preheating to the main heating chamber for incineration.

2. The improved aluminum alloy melting furnace according to claim 1, characterized in that, The feeding chamber also includes a first circulating fan, located in the first flue, for drawing the preheated flue gas to the heating main chamber.

3. The improved aluminum alloy melting furnace according to claim 1 or 2, characterized in that, The main heating chamber is equipped with a main heating chamber flue for discharging exhaust gas after combustion.

4. The improved aluminum alloy melting furnace according to claim 3, characterized in that, The melting furnace also includes an aluminum liquid circulation device, which connects the main heating chamber and the auxiliary feeding chamber to circulate the molten aluminum in the two chambers and melt aluminum chips.

5. The improved aluminum alloy melting furnace according to claim 4, characterized in that, The aluminum liquid circulation device includes a circulation pump and a pump pipe; the pump pipe connects the heating main chamber and the feeding auxiliary chamber; the circulation pump is located in the pump pipe and is used to draw aluminum liquid to make the aluminum liquid circulate.

6. The improved aluminum alloy melting furnace according to claim 5, characterized in that, A first aluminum liquid circulation channel is also provided between the main heating chamber and the auxiliary feeding chamber for direct flow of molten aluminum.

7. The improved aluminum alloy melting furnace according to claim 6, characterized in that, The main heating chamber also includes a main heating chamber furnace door located on the side wall, with the opening of the main heating chamber furnace door facing outward.

8. The improved aluminum alloy melting furnace according to claim 7, characterized in that, The feeding chamber also includes a feeding chamber door located on the side wall, with the opening of the feeding chamber door facing outward.

9. The improved aluminum alloy melting furnace according to claim 8, characterized in that, The melting furnace also includes a third charging chamber, which is located in the auxiliary charging chamber, and the heating temperature in the third charging chamber is lower than the heating temperature in the auxiliary charging chamber; The feeding chamber includes a second preheating device, a second flue, and a second circulating fan. The second preheating device is used to fully bake and preheat the waste aluminum bales containing a large amount of oil or coating from top to bottom. The second flue connects the second preheating device and the main heating chamber. The second circulating fan is located in the second flue and is used to draw the pyrolysis flue gas generated by baking the waste aluminum bales to the main heating chamber for incineration.

10. The improved aluminum alloy melting furnace according to claim 9, characterized in that, A second aluminum liquid circulation channel is also provided between the feeding sub-chamber and the feeding third chamber for direct flow of molten aluminum.

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