Magnesium refining crucible furnace

Abstract

The present application provides a magnesium refining crucible furnace, which divides the furnace into two fire channels on both sides and a fire chamber in the central part by arranging a refractory wall, and connects the fan and the first burner by a four-way valve, and connects the flue gas treatment device to the second burner by the four-way valve, and the first burner and the second burner are respectively connected to the gas pipeline by the first check valve and the second check valve. The crucible furnace of the present application adopts a four-way valve to switch the connection relationship between the first burner, the second burner and the fan and the flue gas treatment device, so as to realize the alternating combustion and heating of the gas in the first fire channel and the second fire channel to ensure uniform heating of the crucible, and arranges a refractory wall with fire holes to prevent the flame of the fuel combustion from directly contacting the crucible while ensuring heat conduction. Through the coordinated use of the above means, the service life of the crucible is extended, and the disadvantage of the short service life of the crucible caused by the direct contact of the crucible with the flame of the fuel combustion in the traditional crucible furnace is overcome.

Description

Technical Field

[0001] The present application relates to the technical field of magnesium refining, and in particular to a magnesium refining crucible furnace. Background Art

[0002] Magnesium is a metal with a relatively low specific gravity and is widely used in the fields of aviation, shipbuilding, automobiles, and construction. At present, the method of producing magnesium is mostly the Pidgeon process, also known as the silicon thermal process. The crude magnesium produced by this process is loose in structure, fragile, and easy to mix with impurities. At the same time, the magnesium particles themselves have a large specific surface area, oxidize quickly, and are easy to burn and difficult to store, so they need to be further refined into magnesium ingots with higher purity. The heating melting furnace is the key equipment for refining magnesium. The melting furnace is a pit-type crucible furnace, which can be heated by coal, gas, electric heating, etc. Gas heating is widely used because it is easy to operate and gas is cheap and easy to obtain.

[0003] However, the existing crucible furnace heated by gas heats the crucible by passing gas into the furnace and then burning it. In this heating method, the flame generated by the combustion of the gas directly contacts the crucible, which causes the temperature of the part of the crucible that contacts the flame to be too high, resulting in uneven heating of the crucible as a whole, thereby shortening the service life of the crucible. Utility Model Content

[0004] The present application provides a magnesium refining crucible furnace, which is used to solve the problem that in the above-mentioned gas-fired crucible heating method, the flame generated by the combustion of the gas directly contacts the crucible, making the crucible uneven and resulting in a shortened service life of the crucible.

[0005] The present application provides a magnesium refining crucible furnace, comprising a furnace, wherein the furnace is divided into a first fire channel and a second fire channel on opposite sides and a fire chamber in the middle by refractory walls on both sides;

[0006] The first fire channel, the second fire channel and the fire chamber are connected through a plurality of fire holes opened on the refractory wall;

[0007] A supporting wall parallel to the refractory wall is also provided in the fire chamber, one end of the supporting wall is fixedly connected to the furnace, and the other end is close to the inner wall of the furnace;

[0008] One end of the first fire channel and the second fire channel are respectively connected to the first burner and the second burner;

[0009] The first burner and the second burner are both connected to the four-way valve;

[0010] The four-way valve is also connected to the fan and the flue gas treatment device respectively;

[0011] The first burner is also connected to the gas pipeline through a first check valve, and the second burner is also connected to the gas pipeline through a second check valve.

[0012] Optionally, the first burner includes a first heat storage body and a first gas pipeline buried in the first heat storage body, and the first gas pipeline is connected to the gas pipeline through a first check valve;

[0013] The second burner includes a second heat storage body and a second gas pipeline buried in the second heat storage body, and the second gas pipeline is connected to the gas pipeline through a second check valve.

[0014] Optionally, the first interface of the four-way valve is connected to the fan, the second interface is connected to the first heat storage body, the third interface is connected to the flue gas treatment device, and the fourth interface is connected to the second heat storage body.

[0015] Optionally, the four-way valve switches between a first state and a second state.

[0016] In the first state, the first interface of the four-way valve is connected to the second interface, and the third interface is connected to the fourth interface;

[0017] The second state is that the second interface of the four-way valve is communicated with the third interface, and the fourth interface is communicated with the first interface.

[0018] Optionally, the flue gas treatment device includes a dust collector, a heat exchanger, an adsorption tower and a chimney connected in series.

[0019] Optionally, a sand filter layer, an alkalization layer and an activated carbon adsorption layer are sequentially arranged in the adsorption tower from bottom to top.

[0020] Optionally, the four-way valve is also electrically connected to the controller.

[0021] The magnesium refining crucible furnace of the present application divides the furnace into two fire channels on both sides and a fire chamber in the central part by setting a refractory wall, and uses a four-way valve to connect the fan and the first burner, and uses the four-way valve to connect the flue gas treatment device and the second burner. At the same time, the first burner and the second burner are respectively connected to the gas pipeline through the first check valve and the second check valve. The crucible furnace of the present application uses a four-way valve to switch the connection relationship between the first burner, the second burner and the fan and the flue gas treatment device, so as to realize the alternating combustion and heating of the gas in the first fire channel and the second fire channel to ensure uniform heating of the crucible, and sets a refractory wall with fire holes to prevent the flame of the fuel combustion from directly contacting the crucible while ensuring heat conduction. Through the coordinated use of the above means, the service life of the crucible is extended, and the disadvantage of the short service life of the crucible caused by the direct contact of the crucible with the flame of the fuel combustion in the traditional crucible furnace is overcome. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic top view of a magnesium refining crucible furnace provided in one embodiment of the present application;

[0024] Figure 2 A schematic top view of a working state of a magnesium refining crucible furnace provided by an embodiment of the present application;

[0025] Figure 3 A schematic diagram of a connection of a four-way valve in a first state provided by an embodiment of the present application;

[0026] Figure 4 A connection diagram of a second state of a four-way valve provided in an embodiment of the present application;

[0027] Figure 5 A schematic top view of another working state of the magnesium refining crucible furnace provided by one embodiment of the present application;

[0028] Figure 6 A schematic diagram of a flue gas treatment device provided in one embodiment of the present application;

[0029] Figure 7 A schematic diagram of the structure of an adsorption tower provided in one embodiment of the present application;

[0030] Figure 8 A schematic top view of a magnesium refining crucible furnace provided in another embodiment of the present application.

[0031] Description of reference numerals:

[0032] 1. Furnace; 2. Refractory wall; 3. First burner; 4. Second burner; 5. Fan; 6. Flue gas treatment device; 7. Gas pipeline; 8. Controller; 21. First fire channel; 22. Second fire channel; 23. Fire chamber; 31. First heat storage body; 32. First gas pipeline; 41. Second heat storage body; 42. Second gas pipeline; 61. Dust collector; 62. Heat exchanger; 63. Adsorption tower; 64. Chimney; 100. Four-way valve; 200. First check valve; 201. Fire hole; 221. Support wall; 300. Second check valve; 631. Sand filter layer; 632. Alkalinization layer; 633. Activated carbon adsorption layer. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0034] like Figure 1 As shown, the present application provides a magnesium refining crucible furnace, comprising a furnace 1, wherein the furnace 1 is divided into a first fire channel 21 and a second fire channel 22 on opposite sides and a fire chamber 23 in the middle by refractory walls 2 on both sides;

[0035] The first fire channel 21, the second fire channel 22 and the fire chamber 23 are connected through a plurality of fire holes 201 opened on the fireproof wall 2;

[0036] A support wall 221 parallel to the refractory wall 2 is also provided in the fire chamber 23, one end of the support wall 221 is fixedly connected to the furnace 1, and the other end is close to the inner wall of the furnace 1;

[0037] One end of the first fire channel 21 and the second fire channel 22 are respectively connected to the first burner 3 and the second burner 4; the first burner 3 and the second burner 4 are both connected to the four-way valve 100;

[0038] The four-way valve 100 is also connected to the fan 5 and the flue gas treatment device 6 respectively;

[0039] The first burner 3 is also connected to the gas pipeline 7 via a first check valve 200 , and the second burner 4 is also connected to the gas pipeline 7 via a second check valve 300 .

[0040] In the present application, when in use, the fan 5 is connected to the first burner 3 through the four-way valve 100. The second burner 4 is connected to the flue gas treatment device 6 through the four-way valve 100.

[0041] At this time, the gas is supplied to the corresponding pipe in the first burner 3 through the gas pipeline 7 through the first check valve 200, and ignition is performed at this time. The gas supplied by the gas pipeline 7 is mixed with the air supplied by the fan 5, and the gas burns in the first fire channel 21. The flame and heat generated during the combustion process enter the fire chamber 23 through the multiple fire holes 201 opened on the refractory wall 2 of the first fire channel 21, and heat the refining crucible supported on the support wall 221. Since the air supplied by the fan 5 has a certain pressure, the flue gas generated by the air after the auxiliary gas is burned enters the fire chamber 23 on the other side of the support wall 221 through the gap formed on the side of the refractory wall 2 close to the inner wall of the furnace 1, and then enters the second fire channel 22 through the fire hole 201 on the refractory wall 2 of the second fire channel 22. The flue gas carrying heat is discharged from the second burner 4 at one end of the second fire channel 22 through the four-way valve 100 into the flue gas treatment device 6 for treatment. The flue gas is treated in the flue gas treatment device 6 and then discharged.

[0042] The gas continuously supplied by the gas pipeline 7 burns in the first fire channel 21 for a certain period of time, such as 90 seconds. At this time, the four-way valve 100 is controlled to cut the valve (at the same time, the gas is stopped from being supplied to the first burner 3). At this time, the first burner 3 is connected to the flue gas treatment device 6 through the four-way valve 100. Figure 5 As shown; the fan 5 is connected to the second burner 4 through the four-way valve 100, and the gas is fed into the second burner 4 through the gas pipeline 7. The air supplied by the fan 5 and the gas in the second burner 4 are burned in the second fire channel 22, and the combustion process is the same as the combustion process of the first fire channel 21. The flue gas generated after the combustion is discharged through the first burner 3 and discharged into the flue gas treatment device 6 through the four-way valve 100 for treatment.

[0043] The magnesium refining crucible furnace of the present application divides the furnace 1 into two fire channels on both sides and a fire chamber in the central part by setting a refractory wall 2, and uses a four-way valve 100 to connect the fan 5 and the first burner 3, and uses the four-way valve 100 to connect the flue gas treatment device 6 and the second burner 4. At the same time, the first burner 3 and the second burner 4 are also connected to the gas pipeline 7 through the first check valve 200 and the second check valve 300 respectively. The crucible furnace of the present application adopts a four-way valve 100 to switch the connection relationship between the first burner 3, the second burner 4 and the fan 5 and the flue gas treatment device 6, so as to realize the alternating combustion and heating of the gas in the first fire channel 21 and the second fire channel 22 to ensure uniform heating of the crucible, and sets a refractory wall 2 with a fire hole 201 to prevent the flame of the fuel combustion from directly contacting the crucible while ensuring heat conduction. Through the coordinated use of the above means, the service life of the crucible is extended, and the disadvantage of the short service life of the crucible caused by the direct contact of the crucible with the flame of the fuel combustion in the traditional crucible furnace is overcome.

[0044] Alternatively, if Figure 2As shown, the first burner 3 includes a first heat storage body 31 and a first gas pipeline 32 buried in the first heat storage body 31, and the first gas pipeline 32 is connected to the gas pipeline 7 through a first check valve 200;

[0045] The second burner 4 includes a second heat storage body 41 and a second gas pipeline 42 buried in the second heat storage body 41 . The second gas pipeline 42 is connected to the gas pipeline 7 via a second check valve 300 .

[0046] In the present application, the burner includes a gas pipeline and a heat storage body, and the heat in the flue gas generated during the gas combustion process can be recovered through the heat storage body, and the heat can be used to heat the air and gas entering the fire channel, thereby achieving the beneficial effect of fully utilizing the waste heat of the flue gas and saving energy.

[0047] Optionally, the first interface of the four-way valve 100 is connected to the fan 5 , the second interface is connected to the first heat storage body 31 , the third interface is connected to the flue gas treatment device 6 , and the fourth interface is connected to the second heat storage body 41 .

[0048] In the present application, different interfaces of the four-way valve 100 are connected to different devices respectively, and the connection status of its different interfaces can be controlled by switching the four-way valve 100, thereby controlling the combustion or exhaust state in the fire channel.

[0049] Optionally, the four-way valve 100 switches between a first state and a second state;

[0050] like Figure 3 As shown, in the first state, the first interface of the four-way valve 100 is connected to the second interface, and the third interface is connected to the fourth interface;

[0051] like Figure 4 As shown, in the second state, the second interface of the four-way valve 100 is communicated with the third interface, and the fourth interface is communicated with the first interface.

[0052] In the present application, the four-way valve 100 is switched between the first state and the second state, thereby controlling the combustion of gas between the first fire channel 21 and the second fire channel, which is convenient and easy to control.

[0053] Alternatively, if Figure 6 As shown, the flue gas treatment device 6 includes a dust collector 61, a heat exchanger 62, an adsorption tower 63 and a chimney 64 which are connected in series in sequence.

[0054] In the present application, when the flue gas is treated in the flue gas treatment device 6, it first enters the dust collector 61 for dust removal, and the dust removal method can be cyclone dust removal, electric dust removal, water washing dust removal, filtering dust removal, etc. The dust-removed flue gas then enters the heat exchanger 62 to further absorb the residual heat therein, and then enters the adsorption tower 63 for treatment. After the harmful substances in the flue gas are purified by the adsorption tower 63, it is discharged through the chimney 64.

[0055] Alternatively, if Figure 7 As shown, a sand filter layer 631, an alkalization layer 632 and an activated carbon adsorption layer 633 are sequentially arranged in the adsorption tower 63 from bottom to top.

[0056] The flue gas entering the adsorption tower 63 first passes through the sand filter layer 631 for further filtration and dust removal, and then enters the alkalization layer 632 upward, where the acidic substances in the flue gas, such as nitrogen oxides and sulfur dioxide, are removed by the alkaline adsorbents such as slaked lime and alkaline resin in the alkalization layer 632. The alkalized flue gas then enters the activated carbon adsorption layer 633 upward, and after being adsorbed by the activated carbon, it is discharged into the chimney 64 and then discharged.

[0057] Optionally, the four-way valve 100 is also electrically connected to the controller 8 .

[0058] In the present application, the four-way valve 100 is electrically connected to the controller 8, and the four-way valve 100 can be controlled to cut in real time by the controller 8, which has the characteristics of high efficiency and real-time, and can save manpower consumption.

[0059] A magnesium refining crucible furnace, the working process of which is as follows:

[0060] When in use, the four-way valve 100 takes the first state (or the second state) as the initial state, at which time the fan 5 is connected to the first heat storage body 31 in the first burner 3 through the first interface and the second interface of the four-way valve 100. The second heat storage body 41 in the second burner 4 is connected to the flue gas treatment device 6 through the fourth interface and the third interface of the four-way valve 100 (if the second state is taken as the initial state, the corresponding initial connection mode is also adjusted accordingly).

[0061] At this time, the gas is supplied to the first gas pipeline 32 through the gas pipeline 7 through the first check valve 200, and ignited at this time. The gas supplied by the gas pipeline 7 is mixed with the air supplied by the fan 5, and the gas burns in the first fire channel 21. The flame and heat generated during the combustion process enter the fire chamber 23 through the multiple fire holes 201 opened on the refractory wall 2 of the first fire channel 21, and heat the refining crucible supported on the support wall 221. Since the air supplied by the fan 5 has a certain pressure, the flue gas generated by the air after the auxiliary gas is burned enters the fire chamber 23 on the other side of the refractory wall 2 through the gap formed on the side of the inner wall of the furnace 1 of the refractory wall 2, and then enters the second fire channel 22 through the fire hole 201 on the refractory wall 2 of the second fire channel 22, and then the flue gas carrying heat is discharged from the second heat storage body 41 at one end of the second fire channel 22. When the flue gas carrying heat passes through the second heat storage body 41, it exchanges heat with the second heat storage body 41, and the second heat storage body 41 absorbs and stores the heat in the flue gas. The flue gas after heat exchange with the second heat storage body 41 is discharged from the second heat storage body 41 and enters the flue gas treatment device 6 through the fourth interface and the third interface of the four-way valve 100 for treatment.

[0062] When the flue gas is treated in the flue gas treatment device 6, it first enters the dust collector 61 for dust removal. The dust removal method can be cyclone dust removal, electrostatic dust removal, water washing dust removal, filtering dust removal, etc. The flue gas after dust removal then enters the heat exchanger 62 to further absorb the residual heat therein, and then enters the adsorption tower 63 for treatment.

[0063] The flue gas entering the adsorption tower 63 first passes through the sand filter layer 631 for further filtration and dust removal, and then enters the alkalization layer 632 upward, where the acidic substances in the flue gas, such as nitrogen oxides and sulfur dioxide, are removed by the alkaline adsorbents such as slaked lime and alkaline resin in the alkalization layer 632. The alkalized flue gas then enters the activated carbon adsorption layer 633 upward, and after being adsorbed by the activated carbon, it is discharged into the chimney 64 and then discharged.

[0064] The gas continuously supplied by the gas pipeline 7 burns in the first fire channel for a certain period of time, such as 90s. At this time, the controller 8 controls the four-way valve 100 to switch to another state (at the same time, stop introducing gas into the first gas pipeline 32). In this application, switching to the second state is used as an example. At this time, the first heat storage body 31 is connected to the flue gas treatment device through the second interface and the third interface of the four-way valve 100; and the fan 5 is connected to the second heat storage body 41 through the first interface and the third interface of the four-way valve 100. At this time, gas is introduced into the second gas pipeline 42 through the gas pipeline 7. The air supplied by the fan 5 and the gas in the second gas pipeline 42 are heated when passing through the second heat storage body 41. After the two are mixed, they burn in the second fire channel 22. The combustion process is the same as the combustion process of the first fire channel 21 mentioned above. The flue gas generated after combustion absorbs heat through the first heat storage body 31 and is discharged, and is discharged into the flue gas treatment device 6 through the second interface and the third interface of the four-way valve 100 for treatment.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A magnesium refining crucible furnace, comprising a furnace (1), characterized in that: The furnace (1) is divided into a first fire channel (21) and a second fire channel (22) on opposite sides and a fire chamber (23) in the middle by refractory walls (2) on both sides; The first fire channel (21), the second fire channel (22) and the fire chamber (23) are connected via a plurality of fire holes (201) opened on the fireproof wall (2); A support wall (221) parallel to the refractory wall (2) is also provided in the fire chamber (23); one end of the support wall (221) is fixedly connected to the furnace (1), and the other end is close to the inner wall of the furnace (1); One end of the first fire channel (21) and the second fire channel (22) are respectively connected to the first burner (3) and the second burner (4); The first burner (3) and the second burner (4) are both connected to a four-way valve (100); The four-way valve (100) is also connected to the fan (5) and the flue gas treatment device (6) respectively; The first burner (3) is also connected to the gas pipeline (7) via a first check valve (200), and the second burner (4) is also connected to the gas pipeline (7) via a second check valve (300).

2. The magnesium refining crucible furnace according to claim 1, characterized in that: The first burner (3) comprises a first heat storage body (31) and a first gas pipeline (32) buried in the first heat storage body (31), and the first gas pipeline (32) is connected to the gas pipeline (7) via a first check valve (200); The second burner (4) comprises a second heat storage body (41) and a second gas pipeline (42) buried in the second heat storage body (41); the second gas pipeline (42) is connected to the gas pipeline (7) via a second check valve (300).

3. The magnesium refining crucible furnace according to claim 2, characterized in that: The first interface of the four-way valve (100) is connected to the fan (5), the second interface is connected to the first heat storage body (31), the third interface is connected to the flue gas treatment device (6), and the fourth interface is connected to the second heat storage body (41).

4. The magnesium refining crucible furnace according to claim 1, characterized in that: The four-way valve (100) switches between a first state and a second state. The first state is that the first interface of the four-way valve (100) is connected to the second interface, and the third interface is connected to the fourth interface; The second state is that the second interface of the four-way valve (100) is in communication with the third interface, and the fourth interface is in communication with the first interface.

5. The magnesium refining crucible furnace according to claim 1, characterized in that: The flue gas treatment device (6) comprises a dust collector (61), a heat exchanger (62), an adsorption tower (63) and a chimney (64) which are sequentially connected in series.

6. The magnesium refining crucible furnace according to claim 5, characterized in that: The adsorption tower (63) is provided with a sand filter layer (631), an alkalization layer (632) and an activated carbon adsorption layer (633) in sequence from bottom to top.

7. The magnesium refining crucible furnace according to any one of claims 1 to 6, characterized in that: The four-way valve (100) is also electrically connected to the controller (8).

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