A smelting furnace for preventing waste materials from being burned and its usage method

Abstract

The present invention discloses a smelting furnace for preventing waste materials from being burned and a using method thereof, relating to the technical field of smelting furnaces, including support columns, a powder spraying assembly and a feeding assembly. A rotating shaft is installed inside the support columns through a reduction motor, and an outer furnace body is installed on one side of the rotating shaft. A main furnace body is installed inside the outer furnace body, and a material inlet is fixed above the outer furnace body. A furnace cover is installed above the material inlet, and powder spraying assemblies are installed on both outer sides of the material inlet. The feeding assembly is installed on the front and rear outer sides of the outer furnace body, and the feeding assembly includes a feeding pipe, a material bin, a preheating chamber and a feeding chamber. For the smelting furnace for preventing waste materials from being burned and the using method thereof, the mixture of the refining agent and oxygen inside the feeding pipe can enter the heat-resistant inner pipe under the pushing action of the air flow and be sprayed into the furnace chamber through the evenly distributed nozzles, so that the refining agent can be sprayed while sending air to refine the aluminum materials inside the furnace chamber.

Description

Technical Field

[0001] The present invention relates to the technical field of melting furnaces, and particularly to a melting furnace for preventing waste materials from being burned out and a using method thereof. Background Technique

[0002] The melting furnace uses a 200 - 2500Hz intermediate frequency power supply for induction heating, with a power range of 20 - 2500KW. According to its characteristics, it can also be called an intermediate frequency electric furnace. It is mainly used for the melting and temperature raising of precious metals such as gold, platinum, silver, copper, iron, stainless steel, aluminum alloy, aluminum and other metals, and is an ideal equipment for university laboratories, research institutes, jewelry processing, and precision casting processing.

[0003] For example, the invention with the application number CN201611217489.3 discloses a melting furnace. Similar melting furnaces as described in the above application still have the following deficiencies: during the melting process, it is not convenient to combine the refining powder spraying structure and the oxygen supply structure, and separate feeding is required, which is not conducive to the integration of the device.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a melting furnace for preventing waste materials from being burned out and a using method thereof are proposed. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a melting furnace for preventing waste materials from being burned out and a using method thereof, solving the problems raised in the above background technique.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A melting furnace for preventing waste materials from being burned out includes support columns, a powder spraying assembly, and a feeding assembly. A rotating shaft is installed inside the support columns through a reduction motor, and an outer furnace body is installed on one side of the rotating shaft. A main furnace body is installed inside the outer furnace body, and a material port is fixed above the outer furnace body. A furnace cover is installed above the material port, and powder spraying assemblies are installed on both outer sides of the material port. The feeding assembly is installed on the front and rear outer sides of the outer furnace body, and the feeding assembly includes a feeding pipe, a material bin, a preheating chamber, and a feeding chamber. A material bin is installed above the feeding pipe, and a preheating chamber is arranged inside the material bin. A feeding chamber is arranged inside the preheating chamber, and the feeding chamber is in communication with the feeding pipe. A smoke exhaust assembly is installed above the furnace cover, and the smoke exhaust assembly includes an exhaust chamber, a three-way pipe, and a gas supply pipe. The exhaust chamber is fixedly connected to the furnace cover, and gas supply pipes are connected to both upper sides of the exhaust chamber through the three-way pipe.

[0007] Furthermore, a vacuum heat insulation layer is provided between the main furnace body and the outer furnace body, a furnace chamber is installed inside the main furnace body, and an induction coil is arranged on the outer wall of the furnace chamber.

[0008] Further, the powder spraying assembly includes a metering cup, a feed hopper, a valve pipe, and a powder blowing pipe. The feed hopper is fixed above the metering cup, and the valve pipe is connected to the lower part of the metering cup. The powder blowing pipe is fixed below the valve pipe.

[0009] Further, the powder spraying assembly further includes an external blower, a rotating motor, a rotating shaft, and a stirring rod. An external blower is installed on one side of the outer part of the powder blowing pipe, and the external blower is externally connected to a gas supply device. A rotating motor is installed on the other side of the outer part of the powder blowing pipe, and the rotating shaft is rotatably arranged inside the powder blowing pipe. The stirring rod is fixed to the outer side of the rotating shaft.

[0010] Further, the powder spraying assembly further includes a feeding pipe, a heat-resistant inner pipe, and a spray nozzle. The feeding pipe is connected to one side of the outer furnace body close to the lower part of the powder blowing pipe, and the end of the feeding pipe is provided with a heat-resistant inner pipe. The heat-resistant inner pipe is fixed to the inner wall side of the material port, and the spray nozzle is installed inside the heat-resistant inner pipe.

[0011] Further, the feeding pipe is fixedly connected to the furnace chamber, and the feeding pipe is in communication with the furnace chamber, and the feeding pipe has an inclined structure.

[0012] Further, the feeding assembly further includes an air outlet pipe. The air outlet pipe is connected to one side below the preheating chamber.

[0013] Further, the smoke exhaust assembly further includes a ceramic fiber filter layer. The ceramic fiber filter layer is provided inside both the exhaust chamber and the three-way pipe.

[0014] Further, the exhaust chamber is in communication with the preheating chamber through the three-way pipe and the air supply pipe, and the air supply pipe is flange-connected to the preheating chamber.

[0015] Further, the usage method of the melting furnace includes the following specific steps:

[0016] Step 1: Conduct waste pretreatment. Crush, centrifugally dehydrate, and deoil and dry the aluminum blocks to obtain the preliminarily treated solid waste aluminum.

[0017] Step 2: Conduct melting. After pouring molten aluminum into the furnace chamber, the solid waste aluminum in the two-side feeding chambers is fed from the lower side into the lower part of the furnace chamber through the inclined feeding pipe to prevent the waste from being burned. In this stage, the furnace chamber is heated by the induction coil, and the temperature in the furnace is 730 - 760 °C.

[0018] Step 3: While melting, the exhaust chamber sends the hot waste flue gas into the preheating chamber through the three-way pipe and the air supply pipe, so that the preheating chamber can preheat the preliminarily treated solid waste aluminum in its inner feeding chamber.

[0019] Step 4: The refining agent is used to refine the materials inside the aluminum through the method of powder spraying and refining, so that the refining agent inside the measuring cup is sent into the inside of the powder blowing pipe through the valve pipe. Then, an external blower is externally connected to a gas supply device to send the oxygen required for melting into the powder blowing pipe, so that the mixture of the refining agent and oxygen inside the feeding pipe can enter the heat-resistant inner pipe under the pushing action of the air flow and be ejected into the furnace through the evenly distributed nozzles. Furthermore, the refining agent can be sprayed and sent into the furnace while supplying air to refine the aluminum materials inside the furnace.

[0020] The present invention provides a melting furnace for preventing waste materials from being burned and its using method, which has the following beneficial effects:

[0021] 1. The melting furnace for preventing waste materials from being burned is provided with a powder spraying assembly. The feeding hopper facilitates the feeding of the refining agent into the inside of the measuring cup. The valve pipe is equipped with an electromagnetic valve to facilitate the control of the refining agent being sent into the inside of the powder blowing pipe. The external blower is externally connected to a gas supply device to facilitate the sending of the oxygen required for melting into the powder blowing pipe. At the same time, the rotating motor facilitates the rotation of the rotating shaft and the stirring rod, so as to fully mix the powdered refining agent and oxygen, and at the same time prevent the refining agent from caking, so that the mixture of the refining agent and oxygen inside the feeding pipe can enter the heat-resistant inner pipe under the pushing action of the air flow and be ejected into the furnace through the evenly distributed nozzles. Furthermore, the refining agent can be sprayed and sent into the furnace while supplying air to refine the aluminum materials inside the furnace.

[0022] 2. The melting furnace for preventing waste materials from being burned is provided with a feeding assembly. The feeding cavity is interconnected with the furnace through the feeding pipe. The inclined feeding pipe facilitates the feeding of the solid waste aluminum in the feeding cavity from both sides into the lower part inside the furnace from the lower side to prevent the waste materials from being burned.

[0023] 3. The melting furnace for preventing waste materials from being burned is provided with an exhaust gas discharging assembly. The exhaust chamber can send the hot waste gas generated during the melting process into the inside of the preheating cavity through the tee pipe and the gas supply pipe. Furthermore, the preheating cavity can preheat the solid waste aluminum pretreated in the feeding cavity inside it, realizing the reuse of waste gas. And the ceramic fiber filter layers arranged inside the exhaust chamber and the tee pipe can resist high temperature and corrosion, and thus facilitate the preliminary filtration of the hot waste gas to avoid excessive dust in it. The exhaust pipe under the preheating cavity facilitates the discharge of this part of the waste gas and sends it to a purification device to treat the waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view semi-sectional structure schematic diagram of a melting furnace for preventing waste materials from being burned according to the present invention;

[0025] Figure 2 It is an enlarged structure schematic diagram of the rear powder spraying assembly of a melting furnace for preventing waste materials from being burned according to the present invention;

[0026] Figure 3Schematic top view structure of the heat-resistant inner tube of a melting furnace for preventing waste from burning out according to the present invention;

[0027] Figure 4 Schematic side view semi-sectional structure of a melting furnace for preventing waste from burning out according to the present invention;

[0028] Figure 5 Schematic three-dimensional structure of the feeding assembly of a melting furnace for preventing waste from burning out according to the present invention.

[0029] In the figure: 1, support column; 2, rotating shaft; 3, outer furnace body; 4, main furnace body; 5, vacuum heat insulation layer; 6, furnace chamber; 7, induction coil; 8, material inlet; 9, furnace cover; 10, powder spraying assembly; 1001, measuring cup; 1002, feed hopper; 1003, valve pipe; 1004, powder blowing pipe; 1005, external blower; 1006, feeding pipe; 1007, rotating motor; 1008, rotating shaft; 1009, stirring rod; 1010, heat-resistant inner tube; 1011, spray nozzle; 11, feeding assembly; 1101, feed pipe; 1102, storage bin; 1103, preheating chamber; 1104, feeding chamber; 1105, gas outlet pipe; 12, smoke exhaust assembly; 1201, exhaust chamber; 1202, tee pipe; 1203, gas supply pipe; 1204, ceramic fiber filter layer. Specific embodiments

[0030] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0031] Please refer to Figure 1 , the present invention provides a technical solution: a melting furnace for preventing waste from burning out, including a support column 1, a powder spraying assembly 10 and a feeding assembly 11. A rotating shaft 2 is installed inside the support column 1 through a reduction motor, and an outer furnace body 3 is installed on one side of the rotating shaft 2. A main furnace body 4 is installed inside the outer furnace body 3, and a material inlet 8 is fixed above the outer furnace body 3. A furnace cover 9 is installed above the material inlet 8, and powder spraying assemblies 10 are installed on both outer sides of the material inlet 8. A vacuum heat insulation layer 5 is provided between the main furnace body 4 and the outer furnace body 3, and a furnace chamber 6 is installed inside the main furnace body 4, and an induction coil 7 is provided on the outer wall of the furnace chamber 6;

[0032] The specific operation is as follows. The induction coil 7 facilitates heating the furnace chamber 6 to facilitate the melting and temperature increase of carbon metals, alloys, and special metals. The double-layer structure of the outer parts of the main furnace body 4 and the outer furnace body 3 facilitates strengthening the structural strength outside the furnace chamber 6. The vacuum heat insulation layer 5 between the main furnace body 4 and the outer furnace body 3 can play a heat insulation role.

[0033] Please refer to Figures 1 to 3, the powder spraying assembly 10 includes a metering cup 1001, a feed hopper 1002, a valve pipe 1003 and a powder blowing pipe 1004. The feed hopper 1002 is fixed above the metering cup 1001, and the valve pipe 1003 is connected below the metering cup 1001. The powder blowing pipe 1004 is fixed below the valve pipe 1003; the powder spraying assembly 10 further includes an external blower 1005, a rotary motor 1007, a rotating shaft 1008 and a stirring rod 1009. An external blower 1005 is installed on one side of the outside of the powder blowing pipe 1004, and the external blower 1005 is externally connected to a gas supply device. A rotary motor 1007 is installed on the other side of the outside of the powder blowing pipe 1004, and a rotating shaft 1008 is rotatably arranged inside the powder blowing pipe 1004. Stirring rods 1009 are fixed to the outside of the rotating shaft 1008; the powder spraying assembly 10 further includes a feed pipe 1006, a heat-resistant inner pipe 1010 and a spray nozzle 1011. A feed pipe 1006 is connected to one side of the powder blowing pipe 1004 close to the outer furnace body 3 below, and a heat-resistant inner pipe 1010 is arranged at the end of the feed pipe 1006. The heat-resistant inner pipe 1010 is fixed to the inner wall side of the material port 8, and a spray nozzle 1011 is installed inside the heat-resistant inner pipe 1010;

[0034] The specific operation is as follows. The refining agent is conveniently fed into the metering cup 1001 through the feed hopper 1002. The valve pipe 1003 is equipped with a solenoid valve to control the feeding of the refining agent into the powder blowing pipe 1004. The external blower 1005 is externally connected to a gas supply device to conveniently feed the oxygen required for melting into the powder blowing pipe 1004. At the same time, the rotary motor 1007 conveniently drives the rotation of the rotating shaft 1008 and the stirring rods 1009 to fully mix the powdered refining agent with oxygen and avoid caking of the refining agent. The mixture of the refining agent and oxygen inside the feed pipe 1006 can enter the heat-resistant inner pipe 1010 under the pushing action of the air flow and be sprayed into the furnace chamber 6 through the evenly distributed spray nozzles 1011. Furthermore, the refining agent can be fed while sending air to refine the aluminum material inside the furnace chamber 6.

[0035] Please refer to Figures 4 to 5 , the feeding assembly 11 is installed on the front and rear sides of the outside of the outer furnace body 3, and the feeding assembly 11 includes a feed pipe 1101, a material bin 1102, a preheating chamber 1103 and a feeding chamber 1104. The material bin 1102 is installed above the feed pipe 1101, and a preheating chamber 1103 is arranged inside the material bin 1102. A feeding chamber 1104 is arranged inside the preheating chamber 1103, and the feeding chamber 1104 is in communication with the feed pipe 1101. The feeding assembly 11 further includes an air outlet pipe 1105. An air outlet pipe 1105 is connected to one side below the preheating chamber 1103; the feed pipe 1101 is fixedly connected to the furnace chamber 6, and the feed pipe 1101 is in communication with the furnace chamber 6, and the feed pipe 1101 has an inclined structure;

[0036] The specific operation is as follows. The feeding chamber 1104 is interconnected with the furnace chamber 6 through the feeding pipe 1101. The inclined feeding pipe 1101 facilitates feeding the solid waste aluminum in the feeding chamber 1104 from both sides into the lower part inside the furnace chamber 6 from the lower side to prevent the waste from being burned.

[0037] Please refer to Figure 4 , a smoke exhaust assembly 12 is installed above the furnace cover 9, and the smoke exhaust assembly 12 includes an exhaust chamber 1201, a three-way pipe 1202 and an air supply pipe 1203. The exhaust chamber 1201 is fixedly connected to the furnace cover 9, and the air supply pipes 1203 are connected to both sides above the exhaust chamber 1201 through the three-way pipe 1202; the smoke exhaust assembly 12 further includes a ceramic fiber filter layer 1204, and the ceramic fiber filter layer 1204 is provided inside both the exhaust chamber 1201 and the three-way pipe 1202; the exhaust chamber 1201 is interconnected with the preheating chamber 1103 through the three-way pipe 1202 and the air supply pipe 1203, and the air supply pipe 1203 and the preheating chamber 1103 are flange-connected;

[0038] The specific operation is as follows. The exhaust chamber 1201 facilitates sending the hot waste flue gas generated during the melting process into the preheating chamber 1103 through the three-way pipe 1202 and the air supply pipe 1203. Furthermore, the preheating chamber 1103 can preheat the solid waste aluminum pretreated in the feeding chamber 1104 inside it, realizing the reuse of waste gas. And the ceramic fiber filter layer 1204 provided inside the exhaust chamber 1201 and the three-way pipe 1202 can resist high temperature and corrosion. Furthermore, it is convenient to preliminarily filter the hot waste flue gas to avoid excessive dust in it. The exhaust gas is discharged through the air outlet pipe 1105 below the preheating chamber 1103 and sent to a purification device for treating the exhaust gas.

[0039] The usage method of the melting furnace includes the following specific steps:

[0040] Step 1: Conduct waste pretreatment, crush the aluminum blocks, perform centrifugal dehydration and oil removal and drying to obtain the preliminarily treated solid waste aluminum;

[0041] Step 2: Conduct melting. After pouring aluminum liquid into the furnace chamber 6, the solid waste aluminum in the two feeding chambers 1104 is fed into the lower part inside the furnace chamber 6 from the lower side through the inclined feeding pipe 1101 to prevent the waste from being burned. In this stage, the furnace chamber 6 is heated by the induction coil 7 to make the temperature in the furnace 730 - 760 °C;

[0042] Step 3: While melting, the exhaust chamber 1201 sends the hot waste flue gas into the preheating chamber 1103 through the three-way pipe 1202 and the air supply pipe 1203, so that the preheating chamber 1103 can preheat the solid waste aluminum pretreated in the feeding chamber 1104 inside it;

[0043] Step 4: The refining agent is used to refine the materials inside the aluminum by the powder spraying refining method, so that the refining agent inside the measuring cup 1001 is sent into the inside of the powder blowing pipe 1004 through the valve pipe 1003. Then, the external blower 1005 is externally connected to a gas supply device to send the oxygen required for melting into the powder blowing pipe 1004, so that the mixture of the refining agent and oxygen inside the feeding pipe 1006 can enter the heat-resistant inner pipe 1010 under the pushing action of the air flow and be sprayed out into the furnace chamber 6 through the evenly distributed nozzles 1011. Thus, the refining agent can be sprayed in while sending air to refine the aluminum materials inside the furnace chamber 6.

[0044] In summary, when the melting furnace for preventing waste from burning is in use, first, waste pretreatment is carried out. The aluminum blocks are crushed, centrifugally dehydrated, and deoiled and dried to obtain the preliminarily treated solid waste aluminum. Then, melting is carried out. After pouring aluminum liquid into the furnace chamber 6, the furnace cover 9 is closed. Then, the solid waste aluminum in the two side feeding chambers 1104 is sent from the lower side into the lower part of the furnace chamber 6 through the inclined feeding pipe 1101 to prevent the waste from burning. At this stage, the furnace chamber 6 is heated by the induction coil 7, so that the temperature inside the furnace is 730 - 760 °C. The exhaust chamber 1201 can send the hot waste flue gas generated during the melting process into the inside of the preheating chamber 1103 through the three-way pipe 1202 and the air supply pipe 1203. Thus, the preheating chamber 1103 can preheat the solid waste aluminum pretreated in the inner feeding chamber 1104 on its inner side, realizing the reuse of waste gas. And the ceramic fiber filter layer 1204 provided inside the exhaust chamber 1201 and the three-way pipe 1202 can resist high temperature and corrosion, and thus preliminarily filter the hot waste flue gas. Finally, this part of the waste gas is discharged through the air outlet pipe 1105 on the lower side of the preheating chamber 1103 and sent into the purification equipment to treat the waste gas.

[0045] Then, the refining agent is used to refine the materials inside the aluminum by the powder spraying refining method. In this process, the refining agent is sent into the inside of the measuring cup 1001 through the feeding hopper 1002 and then into the inside of the powder blowing pipe 1004 through the valve pipe 1003. And the external blower 1005 is externally connected to a gas supply device to send the oxygen required for melting into the powder blowing pipe 1004. At the same time, the rotating motor 1007 drives the rotation of the rotating shaft 1008 and the stirring rod 1009 to fully mix the powdered refining agent and oxygen. Then, the mixture of the refining agent and oxygen inside the feeding pipe 1006 can enter the heat-resistant inner pipe 1010 under the pushing action of the air flow and be sprayed out into the furnace chamber 6 through the evenly distributed nozzles 1011. Thus, the refining agent can be sprayed in while sending air to refine the aluminum materials inside the furnace chamber 6. At this time, the dosage of the refining agent is 2.0 ± 0.5 kg / tAl, and the refining time is ≥ 15 min. In this way, the use process of the entire melting furnace for preventing waste from burning is completed.

[0046] The embodiments of the present invention are provided by way of example and description, and are not exhaustive or limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the present invention and its practical application, and to enable those of ordinary skill in the art to understand the present invention so as to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A smelting furnace for preventing waste from burning out, Characterized in that, It includes support columns (1), a powder spraying assembly (10) and a feeding assembly (11). A rotating shaft (2) is installed inside the support column (1) through a reduction motor, and an outer furnace body (3) is installed on one side of the rotating shaft (2). A main furnace body (4) is installed inside the outer furnace body (3), and a feeding port (8) is fixed above the outer furnace body (3). A furnace cover (9) is installed above the feeding port (8), and powder spraying assemblies (10) are installed on both outer sides of the feeding port (8). The feeding assembly (11) is installed on the front and back sides outside the outer furnace body (3), and the feeding assembly (11) includes a feeding pipe (1101), a material bin (1102), a preheating chamber (1103) and a feeding chamber (1104). A material bin (1102) is installed above the feeding pipe (1101), and a preheating chamber (1103) is arranged inside the material bin (1102). A feeding chamber (1104) is arranged inside the preheating chamber (1103), and the feeding chamber (1104) is communicated with the feeding pipe (1101). A smoke exhaust assembly (12) is installed above the furnace cover (9), and the smoke exhaust assembly (12) includes an exhaust chamber (1201), a three-way pipe (1202) and an air supply pipe (1203). The exhaust chamber (1201) is fixedly connected to the furnace cover (9), and air supply pipes (1203) are connected to both upper sides of the exhaust chamber (1201) through the three-way pipe (1202). The powder spraying assembly (10) further includes a feeding pipe (1006), a heat-resistant inner pipe (1010) and a spraying port (1011). A feeding pipe (1006) is connected to one side of the lower part of the powder blowing pipe (1004) close to the outer furnace body (3), and a heat-resistant inner pipe (1010) is arranged at the end of the feeding pipe (1006). The heat-resistant inner pipe (1010) is fixed on the inner wall side of the feeding port (8), and a spraying port (1011) is installed inside the heat-resistant inner pipe (1010).

2. The smelting furnace for preventing waste from burning out according to claim 1, Characterized in that, A vacuum heat insulation layer (5) is arranged between the main furnace body (4) and the outer furnace body (3), a furnace chamber (6) is installed inside the main furnace body (4), and an induction coil (7) is arranged on the outer wall of the furnace chamber (6).

3. The smelting furnace for preventing waste from burning out according to claim 2, Characterized in that, The powder spraying assembly (10) includes a measuring cup (1001), a feeding hopper (1002), a valve pipe (1003) and a powder blowing pipe (1004). A feeding hopper (1002) is fixed above the measuring cup (1001), a valve pipe (1003) is connected below the measuring cup (1001), and a powder blowing pipe (1004) is fixed below the valve pipe (1003).

4. The smelting furnace for preventing waste from burning out according to claim 3, Characterized in that, The powder spraying assembly (10) further includes an external blower (1005), a rotating motor (1007), a rotating shaft (1008), and a stirring rod (1009). An external blower (1005) is installed on one side of the outside of the powder blowing pipe (1004), and the external blower (1005) is externally connected to a gas supply device. A rotating motor (1007) is installed on the other side of the outside of the powder blowing pipe (1004), and a rotating shaft (1008) is rotatably arranged inside the powder blowing pipe (1004). A stirring rod (1009) is fixed to the outside of the rotating shaft (1008).

5. A melting furnace for preventing waste from being burned, according to claim 4, wherein, the feed pipe (1101) is fixedly connected to the furnace chamber (6), the feed pipe (1101) and the furnace chamber (6) are in communication with each other, and the feed pipe (1101) has an inclined structure.

6. A melting furnace for preventing waste from being burned, according to claim 5, wherein, the feeding assembly (11) further includes an air outlet pipe (1105), and an air outlet pipe (1105) is connected to one side below the preheating chamber (1103).

7. A melting furnace for preventing waste from being burned, according to claim 6, wherein, the smoke exhaust assembly (12) further includes a ceramic fiber filter layer (1204), and a ceramic fiber filter layer (1204) is provided inside both the exhaust chamber (1201) and the tee pipe (1202).

8. A melting furnace for preventing waste from being burned, according to claim 7, wherein, the exhaust chamber (1201) is in communication with the preheating chamber (1103) through the tee pipe (1202) and the air supply pipe (1203), and the air supply pipe (1203) and the preheating chamber (1103) are flange-connected.

9. A melting furnace for preventing waste from being burned, according to claim 8, wherein, the using method of the melting furnace includes the following specific steps: Step 1: Perform waste pretreatment. Crush, centrifugally dehydrate, and deoiling and drying the aluminum blocks to obtain the preliminarily treated solid waste aluminum. Step 2: Perform melting. After pouring molten aluminum into the furnace chamber (6), the solid waste aluminum in the two-side feeding chambers (1104) is fed from the lower side into the lower part inside the furnace chamber (6) through the inclined feed pipe (1101) to prevent the waste from being burned. In this stage, the furnace chamber (6) is heated by the induction coil (7) to make the temperature in the furnace 730 - 760 °C. Step 3: While melting, the exhaust chamber (1201) sends the hot waste flue gas into the preheating chamber (1103) through the tee pipe (1202) and the air supply pipe (1203), so that the preheating chamber (1103) can preheat the preliminarily treated solid waste aluminum in its inner feeding chamber (1104). Step 4: The refining agent is used to refine the materials inside the aluminum through the method of powder spraying refining, so that the refining agent inside the metering cup (1001) is sent into the inside of the powder blowing pipe (1004) through the valve pipe (1003). Then, an external blower (1005) is externally connected to a gas supply device to send the oxygen required for melting into the powder blowing pipe (1004), so that the mixture of the refining agent and oxygen inside the feed pipe (1006) can enter the heat-resistant inner pipe (1010) under the pushing action of the air flow and be ejected into the furnace chamber (6) through the uniformly distributed nozzles (1011). Furthermore, the refining agent can be sent in while spraying powder to refine the aluminum materials inside the furnace chamber (6).

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