Aluminum alloy melting furnace

Abstract

The present application relates to a kind of aluminum alloy melting furnace, comprising: heating main chamber, for heating and containing aluminium water;Addition sub-chamber, including first preheating device and first flue, for preheating and burning the flue gas generated by bulk waste aluminum containing a small amount of oil stain and coating;And the heating temperature lower than the addition sub-chamber, addition three chambers are located in the addition sub-chamber;The addition three chambers include second preheating device and second flue;The second preheating device is used for the sufficient baking preheating of waste aluminum bale containing a large amount of oil stain or coating from top to bottom;Second flue connects the second preheating device and the heating main chamber, for sending the cracking flue gas generated by the waste aluminum bale baking to the heating main chamber and burning it.By the above arrangement, the problem that the oil stain in waste aluminum in the current aluminum alloy processing process can be solved by fire combustion to form oxide dregs, corrode furnace and cause the quality of aluminium water to decline.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy melting furnace. BACKGROUND

[0002] With the continuous development of China's secondary aluminum industry, the types of aluminum scrap are gradually complex, making the aluminum processing technology more complex. At the same time, in response to the environmental protection and energy saving call of the state, the aluminum processing technology must be more advanced to meet the needs of the industry and environmental protection requirements.

[0003] Generally, aluminum materials include bulk scrap aluminum containing a small amount of oil stains and coatings, and scrap aluminum bales containing a large amount of oil stains or coatings.

[0004] At present, the aluminum alloy melting furnace and other aluminum material processing furnaces are usually double-chamber furnaces, which are provided with a heating main chamber and a charging auxiliary chamber. The aluminum scrap is added into the hearth of the charging auxiliary chamber through the charging auxiliary chamber door for melting and processing. At this time, the scrap is not fully preheated, and the scrap aluminum floats on the surface of the aluminum liquid after being pushed into the molten pool. The unroasted oil stains in the scrap aluminum will ignite and burn in the high-temperature environment, causing rapid formation of aluminum oxide burning loss, and a large amount of dross on the surface of the aluminum liquid, which will erode the refractory structure in the hearth and cause damage to the lining of the furnace chamber. At the same time, the untreated burning pollutants and impurities will be mixed into the aluminum water, which will also seriously affect the quality of the aluminum water. SUMMARY

[0005] To solve the above technical problems, the purpose of the present application is to provide an aluminum alloy melting furnace to solve the problem that the oil stains in the scrap aluminum will ignite and burn to form oxide dross, erode the hearth and cause the quality of the aluminum water to decrease in the current aluminum alloy processing process.

[0006] To achieve one of the above purposes, an embodiment of the present application provides an aluminum alloy melting furnace, comprising:

[0007] a heating main chamber for heating and containing aluminum water;

[0008] a charging auxiliary chamber comprising a first preheating device and a first flue for roasting and preheating bulk scrap aluminum containing a small amount of oil stains and coatings, and sending the flue gas generated by preheating to the heating main chamber for incineration;

[0009] and a charging third chamber located in the charging auxiliary chamber, and the heating temperature in the charging third chamber is lower than that in the charging auxiliary chamber; the charging third chamber comprises a second preheating device and a second flue; the second preheating device is used for fully roasting and preheating scrap aluminum bales containing a large amount of oil stains or coatings from top to bottom; the second flue connects the second preheating device and the heating main chamber, and is used for sending the cracking flue gas generated by roasting the scrap aluminum bales to the heating main chamber for incineration.

[0010] As a further improvement of the embodiment of the present application, the feeding three-chamber further comprises a second circulating fan arranged in the second flue for pumping the pyrolysis flue gas generated by baking to the heating main chamber.

[0011] As a further improvement of the embodiment of the present application, the feeding three-chamber further comprises a feeding three-chamber door and a gas sealing device arranged at the position of the feeding three-chamber door for preventing the pyrolysis flue gas from leaking.

[0012] As a further improvement of the embodiment of the present application, the feeding three-chamber door is arranged at the top of the feeding three-chamber and opens upward.

[0013] As a further improvement of the embodiment of the present application, the melting furnace further comprises an automatic feeding device arranged above the feeding three-chamber door.

[0014] As a further improvement of the embodiment of the present application, the heating main chamber is provided with a heating main chamber flue for discharging the tail gas after incineration.

[0015] As a further improvement of the embodiment of the present application, the melting furnace further comprises an aluminum liquid circulating device for connecting the heating main chamber and the feeding auxiliary chamber for circulating the aluminum water in the two chambers and melting the aluminum scraps.

[0016] As a further improvement of the embodiment of the present application, the aluminum liquid circulating device comprises a circulating pump and a pump pipe; the pump pipe connects the heating main chamber and the feeding auxiliary chamber; the circulating pump is arranged in the pump pipe for pumping the aluminum water to make the aluminum water flow in a circulating manner.

[0017] As a further improvement of the embodiment of the present application, a first aluminum liquid circulating channel is arranged between the heating main chamber and the feeding auxiliary chamber for directly flowing the aluminum water; a second aluminum liquid circulating channel is arranged between the feeding auxiliary chamber and the feeding three-chamber for directly flowing the aluminum water.

[0018] As a further improvement of the embodiment of the present application, the feeding auxiliary chamber further comprises a first circulating fan arranged in the first flue for pumping the flue gas generated by preheating to the heating main chamber.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The aluminum alloy melting furnace comprises a heating main chamber and a feeding auxiliary chamber; a first preheating device and a first flue are arranged in the feeding auxiliary chamber for preheating, removing and incinerating the small amount of oil stains and coating materials of the bulk waste aluminum in the form of flue gas;

[0021] Meanwhile, a feeding third chamber is additionally arranged in the feeding auxiliary chamber, and the temperature of the feeding third chamber is lower than that of the feeding auxiliary chamber, so that the waste aluminum bales containing a large amount of oil stains or coating can be preheated; the feeding third chamber comprises a second preheating device and a second flue, the second flue is communicated with the second preheating device and the heating main chamber, and is used for sending the cracking flue gas generated by baking the waste aluminum bales in the second preheating device into the heating main chamber to be incinerated;

[0022] Through the above arrangement, the oil stains and coating in the waste aluminum which are easy to burn can be preheated, removed in the form of flue gas and incinerated, so that the dross in the aluminum liquid caused by the aluminum oxide generated by burning can be avoided, the refractory material structure caused by erosion can be further avoided to cause the hearth to be damaged, and the quality of the aluminum water can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0024] Fig. 1 is a cross-sectional structure schematic diagram of an aluminum alloy melting furnace in an embodiment of the present application;

[0025] Fig. 2 is another cross-sectional structure schematic diagram of an aluminum alloy melting furnace in an embodiment of the present application.

[0026] The labels involved in the drawings are as follows:

[0027] Feeding auxiliary chamber 1, feeding auxiliary chamber furnace door 15, feeding third chamber 2, second flue 21, feeding third chamber furnace door 25, gas sealing device 26, heating main chamber 3, heating main chamber furnace door 35, aluminum liquid circulating device 4, pump pipe 41, first aluminum liquid circulating passage 51, second aluminum liquid circulating passage 52. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be described clearly and completely in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0029] The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0030] As Figs. 1-2 shown, an embodiment of the present application provides an aluminum alloy melting furnace, comprising:

[0031] a heating main chamber 3 for heating and containing aluminum liquid;

[0032] a charging sub-chamber 1 comprising a first preheating device and a first flue for baking and preheating bulk waste aluminum containing a small amount of oil stains and coatings, and sending the flue gas generated by preheating to the heating main chamber 3 for incineration;

[0033] and a charging three-chamber 2 located in the charging sub-chamber 1, and the heating temperature in the charging three-chamber 2 is lower than that of the charging sub-chamber 1; the charging three-chamber 2 comprises a second preheating device and a second flue 21; the second preheating device is used for sufficient baking and preheating of waste aluminum bales containing a large amount of oil stains or coatings from top to bottom; the second flue 21 connects the second preheating device and the heating main chamber 3, and is used for sending the cracking flue gas generated by baking the waste aluminum bales to the heating main chamber 3 for incineration.

[0034] Specifically, the aluminum alloy melting furnace comprises a heating main chamber 3 and a charging sub-chamber 1; a first preheating device and a first flue are arranged in the charging sub-chamber 1 for preheating, removing and incinerating the small amount of oil stains and coatings and other substances in the bulk waste aluminum which are easy to burn in the form of flue gas;

[0035] At the same time, a charging three-chamber 2 is additionally arranged in the charging sub-chamber 1, and the temperature of the charging three-chamber 2 is lower than that of the charging sub-chamber 1, which facilitates the preheating of waste aluminum bales containing a large amount of oil stains or coatings and other waste aluminum; wherein the charging three-chamber 2 comprises a second preheating device and a second flue 21, and the second flue 21 connects the second preheating device and the heating main chamber 3, and is used for sending the cracking flue gas generated by baking the waste aluminum bales in the second preheating device to the heating main chamber 3 for incineration;

[0036] Through the above arrangement, the oil stains and coatings and other substances in the waste aluminum which are easy to burn can be preheated, removed and incinerated in the form of flue gas, thereby avoiding the formation of dross in the aluminum liquid due to the combustion of aluminum oxide, further avoiding the erosion of refractory material structure leading to the damage of the hearth, and at the same time improving the quality of the aluminum liquid.

[0037] Further, the charging sub-chamber 1 further comprises a first circulating fan arranged in the first flue for pumping the flue gas generated by preheating to the heating main chamber 3.

[0038] Further, the charging three-chamber 2 further comprises a second circulating fan arranged in the second flue 21 for pumping the cracking flue gas generated by baking to the heating main chamber 3.

[0039] Further, the heating main chamber 3 is provided with a heating main chamber 3 flue for discharging tail gas after incineration.

[0040] In actual use, the first circulating fan and the second circulating fan can respectively rapidly transport the flue gas and the pyrolysis flue gas to the heating main chamber 3, and the heating main chamber 3 is provided with a heating main chamber flue; after the flue gas and / or the pyrolysis flue gas are incinerated in the heating main chamber 3, they are basically eliminated, and the remaining tail gas can be discharged from the heating main chamber flue, so as to realize zero emission of pollutants.

[0041] Further, the feeding third chamber 2 further comprises a feeding third chamber furnace door 25 and a gas sealing device 26, the gas sealing device 26 is arranged at the position of the feeding third chamber furnace door 25, and is used for preventing the pyrolysis flue gas from leaking.

[0042] In this way, the pyrolysis flue gas can be effectively prevented from leaking, so as to avoid causing damage to the health of personnel or pollution of mis-discharge.

[0043] Further, the heating main chamber 3 further comprises a heating main chamber furnace door 35 located at the side wall, and the opening of the heating main chamber furnace door 35 faces outward.

[0044] Further, the feeding auxiliary chamber 1 further comprises a feeding auxiliary chamber furnace door 15 located at the side wall, and the opening of the feeding auxiliary chamber furnace door 15 faces outward.

[0045] In this way, the staff can conveniently perform feeding and other processing operations on the heating main chamber 3 or the feeding auxiliary chamber 1.

[0046] Further, the feeding third chamber furnace door 25 is arranged at the top of the feeding third chamber 2 and opens upward.

[0047] Further, the melting furnace further comprises an automatic feeding device arranged at a position above the feeding third chamber furnace door 25.

[0048] In this way, through the feeding device and the like, the aluminum scrap can be easily put into the melting furnace and automatically fed under the action of gravity; at the same time, different types of waste materials, such as bulk waste aluminum containing a small amount of oil stains and coating, and waste aluminum bale containing a large amount of oil stains or coating, can be respectively put into different furnace chambers for processing, so as to improve the processing efficiency.

[0049] At the same time, the automatic feeding device arranged above the feeding third chamber 2 can realize rapid feeding of a large amount of materials, so as to further improve the processing efficiency.

[0050] Further, the melting furnace further comprises an aluminum liquid circulating device 4, which connects the heating main chamber 3 and the feeding auxiliary chamber 1, and is used for circulating the aluminum water in the two furnace chambers and melting the aluminum scrap.

[0051] In this way, the aluminum water circulates between the heating main chamber 3 and the feeding auxiliary chamber 1, and the high-temperature aluminum water can further melt the residual aluminum scrap in the feeding auxiliary chamber 1, so as to effectively utilize heat energy and reduce energy consumption.

[0052] Further, the molten aluminum circulating device 4 comprises a circulating pump and a pump pipe 41; the pump pipe 41 connects the heating main chamber 3 and the feeding auxiliary chamber 1; the circulating pump is arranged in the pump pipe 41 and used for extracting the molten aluminum to realize the circulation of the molten aluminum.

[0053] In actual use, the circulating pump can quickly extract the molten aluminum to realize the rapid circulation, thereby improving the processing efficiency and further improving the utilization rate of the heat energy and other energy consumptions.

[0054] Further, the first molten aluminum circulating channel 51 is arranged between the heating main chamber 3 and the feeding auxiliary chamber 1 and used for directly circulating the molten aluminum; the second molten aluminum circulating channel 52 is arranged between the feeding auxiliary chamber 1 and the feeding third chamber 2 and used for directly circulating the molten aluminum.

[0055] In actual use, the molten aluminum can directly circulate in the first molten aluminum circulating channel 51 and the second molten aluminum circulating channel 52 to accelerate the circulation and heat exchange or transfer of the molten aluminum, and meanwhile, the pressure balance of the furnace chambers of the melting furnace can be ensured to guarantee the stability of the internal device.

[0056] In summary, in the embodiment of the present application, the waste materials containing different oil stains and coating contents are preheated in different hearths, and the preheating temperatures of the different hearths are different.

[0057] Specifically, the first preheating device is arranged in the feeding auxiliary chamber 1, the bulk waste aluminum containing a small amount of oil stains and coating is preheated on the baking platform in the first preheating device, and the flue gas generated by the preheating is sent to the heating main chamber 3 for incineration; the feeding third chamber 2 is added to the feeding auxiliary chamber 1, the waste aluminum bale containing a large amount of oil stains or coating is preheated in the second preheating device in the feeding third chamber 2, and the cracking flue gas generated by the baking is sent to the heating main chamber 3 for incineration.

[0058] Therefore, the different types of oil stains and coating and other flammable substances can be effectively preheated to form gas, and all the gas is sent to the feeding main chamber for incineration, so that the different types of flammable substances in the waste aluminum are effectively removed, the burning and generation of oxides are avoided, the burning loss caused by the rapid oxidation of aluminum is reduced, the erosion damage to the lining of the furnace body is reduced, the quality of the molten aluminum is improved, and the environmental protection emission requirements of the industrial tail gas are met.

[0059] It should be understood that although the present specification is described in terms of embodiments, each embodiment does not necessarily contain only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0060] The above detailed description merely illustrates preferred and possible non-limiting embodiments of the application, and is not intended to limit the scope of the application. Any equivalent embodiments or modifications made without departing from the spirit of the application should be included in the scope of the application.

Claims

1. An aluminum alloy melting furnace characterized by comprising: It comprises: a heating main chamber for heating and containing molten aluminum; a charging auxiliary chamber comprising a first preheating device and a first flue for baking and preheating bulk aluminum containing a small amount of oil stains and coating, and sending flue gas generated by preheating to the heating main chamber for incineration; and a charging third chamber located in the charging auxiliary chamber, and the heating temperature in the charging third chamber is lower than that of the charging auxiliary chamber; the charging third chamber comprises a second preheating device and a second flue; the second preheating device is used for sufficient baking and preheating of aluminum scrap packaging blocks containing a large amount of oil stains or coating from top to bottom; the second flue connects the second preheating device and the heating main chamber, and is used for sending pyrolysis flue gas generated by baking the aluminum scrap packaging blocks to the heating main chamber for incineration.

2. The aluminum alloy melting furnace of claim 1, wherein The charging third chamber further comprises a second circulating fan arranged in the second flue for pumping the pyrolysis flue gas generated by baking to the heating main chamber.

3. The aluminum alloy melting furnace of claim 1 or 2, wherein The charging third chamber further comprises a charging third chamber door and a gas sealing device arranged at the position of the charging third chamber door for preventing the pyrolysis flue gas from leaking.

4. The aluminum alloy melting furnace of claim 3, wherein The charging third chamber door is arranged at the top of the charging third chamber and opens upward.

5. The aluminum alloy melting furnace of claim 4, wherein The melting furnace further comprises an automatic charging device arranged above the charging third chamber door.

6. The aluminum alloy melting furnace of claim 5, wherein The heating main chamber is provided with a heating main chamber flue for discharging tail gas after incineration.

7. The aluminum alloy melting furnace of claim 6, wherein The melting furnace further comprises an aluminum liquid circulating device connecting the heating main chamber and the charging auxiliary chamber for circulating molten aluminum in the two chambers and melting aluminum scrap.

8. The aluminum alloy melting furnace of claim 7, wherein The aluminum liquid circulating device comprises a circulating pump and a pump pipe; the pump pipe connects the heating main chamber and the charging auxiliary chamber; the circulating pump is arranged in the pump pipe for pumping molten aluminum to make it circulate.

9. The aluminum alloy melting furnace of claim 8, wherein, A first aluminum liquid circulating channel is further arranged between the heating main chamber and the charging auxiliary chamber for directly flowing molten aluminum; and a second aluminum liquid circulating channel is further arranged between the charging auxiliary chamber and the charging third chamber for directly flowing molten aluminum.

10. The aluminum alloy melting furnace of claim 9, wherein The charging auxiliary chamber further comprises a first circulating fan arranged in the first flue for pumping the preheating flue gas to the heating main chamber.

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