Smelting equipment

Abstract

The utility model discloses smelting equipment. The smelting equipment comprises a side blowing smelting furnace, a blowing device, a first discharging assembly, a second discharging assembly and a heat preservation spray gun. The side blowing smelting furnace is provided with a production smoke outlet and an auxiliary smoke outlet; the first discharge assembly and the second discharge assembly are respectively used for opening and closing the production smoke outlet and the auxiliary smoke outlet; the heat preservation spray gun can heat the interior of the side-blown smelting furnace. In the normal production process, the production smoke outlet is opened, the auxiliary smoke outlet is closed, and smoke is discharged through the production smoke outlet; when smelting equipment breaks down and oxygen and material are stopped, the production smoke outlet is closed, the auxiliary smoke outlet is opened, melt in the side-blown smelting furnace is heated and subjected to heat preservation through the heat preservation spray gun, and generated smoke is exhausted through the auxiliary smoke outlet. Due to the fact that the melt can be heated through the heat preservation spray gun, excessive temperature drop of the melt can be effectively avoided, it is ensured that the freezing degree of the melt meets the requirements of air supply and feeding, and therefore the situation of dead furnace is effectively avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal smelting, and particularly relates to a smelting equipment. BACKGROUND

[0002] The side-blown smelting process is a current mainstream smelting process and is widely applied to the field of non-ferrous metal pyrometallurgy, such as copper smelting. When the existing side-blown smelting process needs to be stopped due to equipment failure, the furnace body cooling water cannot be cut off, and insulation is usually needed to avoid the rapid drop of the temperature of the molten body in the furnace, which leads to a dead furnace. At present, a layer of coal is usually added to the surface of the molten body for insulation, and air blowing and material feeding are restarted after the fault is handled. However, this method cannot guarantee that the freezing degree of the molten body meets the requirements of air blowing and material feeding, and there is a risk of a dead furnace. CONTENT OF THE UTILITY MODEL

[0003] The technical problem to be solved by the application is that, when the existing side-blown smelting equipment fails, a layer of coal is added to the surface of the molten body for insulation, which cannot guarantee that the freezing degree of the molten body meets the requirements of air blowing and material feeding after the fault is handled, and there is a risk of a dead furnace. In order to solve the technical problem, the application provides a smelting equipment which can insulate the molten body, ensure that the freezing degree of the molten body meets the requirements of air blowing and material feeding, and avoid a dead furnace.

[0004] The technical scheme provided by the application is as follows:

[0005] A smelting equipment comprises:

[0006] A side-blown smelting furnace is provided with a production smoke outlet and an auxiliary smoke outlet;

[0007] A blowing device is arranged on the downstream side of the side-blown smelting furnace;

[0008] A first discharge assembly and a second discharge assembly are arranged correspondingly to the production smoke outlet and the auxiliary smoke outlet to open and close the production smoke outlet and the auxiliary smoke outlet, respectively;

[0009] An insulation lance is arranged correspondingly to the side-blown smelting furnace, and the insulation lance can heat the side-blown smelting furnace.

[0010] In normal production process, the production exhaust port is opened, the auxiliary exhaust port is closed, and the flue gas is discharged through the production exhaust port. When the smelting equipment is out of order and oxygen and material are stopped, the production exhaust port is closed, the auxiliary exhaust port is opened, and the molten bath in the side-blown smelting furnace is heated and kept warm by the heat preservation spray gun. The flue gas generated is discharged through the auxiliary exhaust port. Since the heat preservation spray gun can heat the molten bath, the temperature drop of the molten bath can be effectively avoided, and the freezing degree of the molten bath can meet the requirements of air supply and material feeding, so that the situation of dead furnace can be effectively avoided. In addition, the molten bath does not need to be emptied, and the furnace does not need to be restarted after the fault is handled, which shortens the downtime and reduces the cost.

[0011] Further, the smelting equipment further comprises a bypass flue, one end of the bypass flue being connected to the auxiliary exhaust port of the side-blown smelting furnace.

[0012] Further, the bypass flue comprises a movable section and a fixed section connected to each other, the movable section being movably arranged relative to the side-blown smelting furnace and the fixed section, and during movement of the movable section, one end of the movable section away from the fixed section can be connected to and separated from the auxiliary exhaust port of the side-blown smelting furnace.

[0013] Further, the smelting equipment further comprises a water cooling jacket and a flue gas cooler, the water cooling jacket being arranged in the bypass flue to cool the bypass flue, and the flue gas cooler being connected to the bypass flue to cool the flue gas input into the bypass flue.

[0014] Further, the bypass flue comprises a shell and a refractory layer, the shell having a flue for flue gas to pass through, and the refractory layer being arranged on the inner wall of the flue of the shell.

[0015] Further, the heat preservation spray gun is configured to be operatively extended into or moved out of the side-blown smelting furnace to heat the inside of the side-blown smelting furnace when extended into the side-blown smelting furnace.

[0016] Further, the top or side of the side-blown smelting furnace is provided with an opening, and the heat preservation spray gun can be extended into and moved out of the side-blown smelting furnace through the opening.

[0017] Further, the smelting equipment comprises a plurality of heat preservation spray guns.

[0018] Further, the first discharge assembly comprises a discharge driving member and a gate plate, the discharge driving member being connected to the gate plate to drive the gate plate to move relative to the side-blown smelting furnace, and the gate plate being capable of opening and closing the production exhaust port during movement.

[0019] Further, the blowing device is one of a multiple-lance top blowing converter, a horizontal converter, a flash smelting furnace, an Ausmelt converter, an Isa converter and a bottom blowing converter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and are used to explain the present application, but are not used to limit the present application.

[0021] Figure 1 The structure schematic diagram of the smelting equipment provided by an embodiment of the present application.

[0022] Label explanation:

[0023] 100, side-blown smelting furnace; 110, production exhaust port; 120, auxiliary exhaust port; 130, furnace body; 131, charging port; 132, air supply port; 133, slag discharge port; 134, product discharge port; 140, main flue; 150, product chute; 200, blowing device; 300, heat preservation lance; 400, bypass flue. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] In the description of the present application, it should be understood that the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise” and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In order to facilitate the understanding of the technical solutions of the present application, the existing side-blown smelting process is further described herein:

[0027] For the existing side-blown smelting process, when the equipment fails to stop oxygen and stop material, in addition to the above-mentioned adding a layer of coal for heat preservation, the method of emptying the melt can be used to avoid the risk of dead furnace. This method can be used when the fault time is long. However, using the method of emptying the melt requires re-starting the furnace after the fault is handled, which takes a long time and results in a long production stoppage time and high cost.

[0028] To solve the above technical problems, the present application provides a smelting equipment for smelting non-ferrous metals, and when a fault occurs, the smelting equipment can heat the melt in the furnace until the fault is handled and ensure that the freezing degree of the melt meets the requirements of re-air supply and charging, thereby avoiding the occurrence of a dead furnace. In addition, the smelting equipment does not need to restart the furnace after the fault is handled, which shortens the production stoppage time and reduces the cost.

[0029] As shown in Figure 1 , the smelting equipment includes a side-blown smelting furnace 100, a blowing device 200, a first discharge assembly, a second discharge assembly, and a heat preservation lance 300.

[0030] The side-blown smelting furnace 100 is provided with a production smoke outlet 110 and an auxiliary smoke outlet 120, wherein the production smoke outlet 110 is used for smoke exhaust during normal production. The blowing device 200 is arranged on the downstream side of the side-blown smelting furnace 100 and is used for blowing the product delivered from the side-blown smelting furnace 100 to the blowing device 200.

[0031] The first discharge assembly and the second discharge assembly are arranged corresponding to the production smoke outlet 110 and the auxiliary smoke outlet 120, respectively. The first discharge assembly is used for opening and closing the production smoke outlet 110, and the second discharge assembly is used for opening and closing the auxiliary smoke outlet 120. The heat preservation lance 300 is arranged corresponding to the side-blown smelting furnace 100, and the heat preservation lance 300 can heat the inside of the side-blown smelting furnace 100.

[0032] Using the above-mentioned smelting equipment, during normal production, the production smoke outlet 110 is opened, the auxiliary smoke outlet 120 is closed, and the flue gas is discharged through the production smoke outlet 110; when the smelting equipment fails to stop oxygen and stop material, the production smoke outlet 110 is closed, the auxiliary smoke outlet 120 is opened, and the melt in the side-blown smelting furnace 100 is heated and preserved by the heat preservation lance 300, and the generated flue gas is discharged through the auxiliary smoke outlet 120. Since the heat preservation lance 300 can heat the melt, it can effectively prevent the temperature of the melt from dropping too much and ensure that the freezing degree of the melt meets the requirements of air supply and charging when the fault is handled, thereby effectively avoiding the occurrence of a dead furnace. In addition, the melt does not need to be emptied, and the furnace does not need to be restarted after the fault is handled, which shortens the production stoppage time and reduces the cost.

[0033] It needs to be explained that the flue gas discharged from the production flue gas outlet 110 is usually transported to a waste heat boiler and an electric dust collector and the like to realize waste heat recovery and flue gas treatment. In the process of heat preservation by the heat preservation spray gun 300, if the flue gas generated by heat preservation is discharged through the production flue gas outlet 110, due to the small amount of flue gas, the temperature of the flue gas after passing through the waste heat boiler will decrease a lot, which will cause the waste heat boiler and the electric dust collector to be prone to dew corrosion, affecting the service life of the device. Therefore, the auxiliary flue gas outlet 120 in the present application discharges the flue gas in the heat preservation process to other devices, for example, directly discharges to a flue gas treatment device and then exhausts, so as to avoid affecting the waste heat boiler and the electric dust collector and the like, prolong the service life of the whole smelting equipment, and avoid production accidents.

[0034] In one embodiment, the side-blown smelting furnace 100 comprises a furnace body 130 connected with a downstream side-blown device 200, and a main flue 140 connected with the furnace body 130, and the main flue 140 is provided with a production flue gas outlet 110 and an auxiliary flue gas outlet 120. The production flue gas outlet 110 and the auxiliary flue gas outlet 120 can be located on the same side surface of the main flue 140 or on different two surfaces respectively. Specifically, in the embodiment shown in the figure, the production flue gas outlet 110 is located on the side of the main flue 140, and the auxiliary flue gas outlet 120 is located on the top of the main flue 140. Figure 1 In the embodiment shown in the figure, the main flue 140 is located on the top of the furnace body 130, the production flue gas outlet 110 is located on the side of the main flue 140, and the auxiliary flue gas outlet 120 is located on the top of the main flue 140.

[0035] In one embodiment, the furnace body 130 is provided with a charging port 131, an air supply port 132, a slag discharge port 133 and a product discharge port 134. The charging port 131 is located on the top of the furnace body 130, the air supply port 132 is located on the side of the furnace body 130 and comprises a primary process air supply port 132 and a secondary process air supply port 132 located above the primary process air supply port 132; the slag discharge port 133 and the product discharge port 134 are respectively located on the opposite two ends of the furnace body 130, the slag discharge port 133 is used for discharging waste slag, and the product discharge port 134 is used for discharging products to the downstream side-blown device 200. For example, in copper smelting, the product discharged from the product discharge port 134 is matte. At the same time, in order to realize the smooth discharge of the product, a product chute 150 is arranged between the furnace body 130 and the side-blown device 200, and the product chute 150 is arranged corresponding to the product discharge port 134 to realize the flow transfer of the product.

[0036] It needs to be explained that in the present embodiment, the side-blown device 200 can be one of a multiple-lance top-blown converter, a horizontal converter, a flash smelting furnace, an Ausmelt converter, an Isa converter and a bottom-blown converter, which is not limited herein.

[0037] In one embodiment, the heat preservation lance 300 is configured to be operatively extended into or moved out of the side-blown smelting furnace 100 to heat the smelting furnace 100 when extended into the side-blown smelting furnace 100. Optionally, the top or side of the side-blown smelting furnace 100 is provided with an opening through which the heat preservation lance 300 can be extended into and moved out of the side-blown smelting furnace 100, for example Figure 1 In one embodiment, the heat preservation lance 300 is configured to be operatively extended into or moved out of the side-blown smelting furnace 100 to heat the smelting furnace 100 when extended into the side-blown smelting furnace 100. Optionally, the top or side of the side-blown smelting furnace 100 is provided with an opening through which the heat preservation lance 300 can be extended into and moved out of the side-blown smelting furnace 100, for example

[0038] It should be noted that in the preferred embodiment, the opening through which the heat preservation lance 300 is extended into and moved out of is the charging port 131 or the air supply port 132 of the furnace body 130, so that no additional opening needs to be provided on the furnace body 130, thereby avoiding affecting the temperature in the furnace body 130. Meanwhile, in the present embodiment, the heat preservation lance 300 heats the smelting material by firing, and the type of fuel can be gas, liquid or solid.

[0039] In one embodiment, the smelting device comprises a plurality of heat preservation lances 300, which act together to improve the heating and heat preservation effect on the smelting material. Meanwhile, it can be understood that when a plurality of heat preservation lances 300 are provided, all the heat preservation lances 300 can be fixed to the side-blown smelting furnace 100, or all the heat preservation lances 300 can be extended into and moved out of the side-blown smelting furnace 100 through the opening; when all the heat preservation lances 300 are extended into and moved out of the side-blown smelting furnace 100 through the opening, some of the heat preservation lances 300 can be extended into and moved out of the side-blown smelting furnace 100 through the charging port 131, and the other heat preservation lances 300 can be extended into and moved out of the side-blown smelting furnace 100 through the air supply port 132.

[0040] In one embodiment, the first discharge assembly comprises a discharge driving member and a shutter, the discharge driving member is connected with the shutter to drive the shutter to move relative to the side-blown smelting furnace 100, and the shutter can open and close the production smoke outlet 110 during movement. Similarly, it can be understood that the second discharge assembly can also comprise a discharge driving member and a shutter to open and close the auxiliary smoke outlet 120.

[0041] In combination with Figure 1 It should be noted that when the smoke outlet (the production smoke outlet 110 and / or the auxiliary smoke outlet 120) is located at the top of the main flue 140, only the shutter can be provided, which is arranged on the top of the main flue 140 to close the smoke outlet; when the smoke outlet needs to be opened, the shutter can be removed; when the smoke outlet is located at the side of the main flue 140, the shutter is preferably driven to move by the discharge driving member.

[0042] In one embodiment, the smelting device further comprises a bypass flue 400, one end of the bypass flue 400 is connected with the auxiliary exhaust port 120 of the side-blown smelting furnace 100, and the other end can be connected with a flue gas treatment device, for example, can be connected into a ring flue gas system to be exhausted after flue gas treatment. Further, the bypass flue 400 comprises a shell and a refractory layer, the shell has a flue for flue gas to pass through, and the refractory layer is arranged on the inner wall of the flue of the shell.

[0043] In one embodiment, the bypass flue 400 comprises a movable section and a fixed section connected with each other, the movable section is movably arranged relative to the side-blown smelting furnace 100, and the fixed section is fixedly arranged relative to the side-blown smelting furnace 100, and during movement of the movable section, one end of the movable section away from the fixed section can be connected with and separated from the auxiliary exhaust port 120 of the side-blown smelting furnace 100.

[0044] It can be understood that when the auxiliary exhaust port 120 is arranged at the top of the main flue 140, the second discharge assembly is a gate; during normal production, the gate is arranged at the auxiliary exhaust port 120 to close the auxiliary exhaust port 120; during the heating and heat preservation process, the gate is removed, and then the movable section is moved to be connected with the auxiliary exhaust port 120, so that the flue gas generated during the heating and heat preservation process enters the bypass flue 400 and is transported to the flue gas treatment device through the bypass flue 400.

[0045] In addition, it should be noted that in other embodiments, the bypass flue 400 can also be fixedly connected with the main flue 140, and at this time, the second discharge assembly is preferably arranged in the main flue 140 and comprises a discharge driving member and a gate.

[0046] In one embodiment, the smelting device further comprises a water cooling jacket arranged in the bypass flue 400, for cooling the bypass flue 400 to avoid high temperature damage to the bypass flue 400. Further, the smelting device further comprises a flue gas cooler connected with the bypass flue 400 to cool the flue gas input into the bypass flue 400.

[0047] It should be noted that in order to reduce costs, the water cooling jacket is arranged at a position of the bypass flue 400 where high temperature risk exists. In addition, in the present embodiment, the flue gas cooler is a spray cooler, that is, by spraying low-temperature spray into the bypass flue 400 to mix with the flue gas, so as to cool and cool the flue gas.

[0048] Based on the description in the above embodiments, in order to facilitate understanding of the technical solutions of the present application, the technical solutions of the present application will be described in combination with the drawings Figure 1 The working process of the smelting device in the above embodiments will be described:

[0049] Taking copper smelting as an example: in the normal production process, the production exhaust port 110 on the main flue 140 is opened, and the auxiliary exhaust port 120 is closed; the flue gas generated by the side-blown smelting furnace 100 is discharged through the production exhaust port 110 to the downstream waste heat boiler for heat recovery, and then treated by electric precipitation, and then the flue gas is subjected to an acid making system. When a device fault occurs, the first discharge assembly closes the production exhaust port 110, removes the gate plate on the auxiliary exhaust port 120, and moves the movable section to be in butt joint with the auxiliary exhaust port 120. Then, a plurality of heat preservation lances 300 are inserted into the side-blown smelting furnace 100 through the charging port 131 to heat and preserve the melt through the heat preservation lances 300, and a temperature detector is arranged to monitor the temperature of the melt to adjust the output of the heat preservation lances 300 according to the temperature of the melt. The flue gas generated by heating and preserving is cooled to below 200 DEG C under the action of the flue gas cooler when passing through the bypass flue 400, and then output to the ring collection flue gas system. After the fault is handled, the heat preservation lances 300 are removed, the bypass flue 400 is removed, the production exhaust port 110 is opened, and production is continued.

[0050] In summary, the smelting equipment provided by the present application has at least the following advantages:

[0051] 1. The melt is heated and preserved by the heat preservation lances 300, avoiding the situation that the freezing degree of the melt does not meet the requirements of air supply and charging due to too much temperature drop of the melt, thereby avoiding the situation of dead furnace;

[0052] 2. The melt does not need to be emptied, the downtime is shortened, and the cost is reduced;

[0053] 3. The flue gas generated by heating and preserving is discharged through the bypass flue 400, which does not affect the waste heat boiler and electric precipitation, thereby prolonging the service life of the equipment.

[0054] Although the embodiments of the present application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A smelting equipment, characterized in that: include: Side-blown smelting furnace, equipped with production smoke exhaust port and auxiliary smoke exhaust port; a blowing device, disposed on the downstream side of the side-blown smelting furnace; A first exhaust assembly and a second exhaust assembly are respectively provided corresponding to the production smoke exhaust port and the auxiliary smoke exhaust port to open and close the production smoke exhaust port and the auxiliary smoke exhaust port respectively; The heat-insulating spray gun is provided corresponding to the side-blowing smelting furnace, and the heat-insulating spray gun can heat the inside of the side-blowing smelting furnace.

2. The smelting equipment according to claim 1, characterized in that: The smelting equipment further includes a bypass flue, one end of which is connected to the auxiliary smoke exhaust port of the side-blown smelting furnace.

3. The smelting equipment according to claim 2, characterized in that: The bypass flue includes a movable section and a fixed section that are connected to each other. The movable section is movably arranged relative to the side-blown smelting furnace and the fixed section. During the movement of the movable section, the end of the movable section away from the fixed section can be connected to and separated from the auxiliary smoke exhaust port of the side-blown smelting furnace.

4. The smelting equipment according to claim 2, characterized in that: The smelting equipment further includes a water cooling jacket and a flue gas cooler. The water cooling jacket is provided in the bypass flue to cool the bypass flue. The flue gas cooler is connected to the bypass flue to cool the flue gas input into the bypass flue.

5. The smelting equipment according to claim 2, characterized in that: The bypass flue comprises a shell and a fire-resistant layer. The shell has a flue for flue gas to pass through, and the fire-resistant layer is covered on the inner wall of the flue of the shell.

6. The smelting equipment according to claim 1, characterized in that: The holding lance is configured to be operably extended into or moved out of the side-blown smelting furnace, so as to heat the inside of the side-blown smelting furnace when extended into the side-blown smelting furnace.

7. The smelting equipment according to claim 6, characterized in that: An opening is provided on the top or side of the side-blown smelting furnace, and the heat-insulating lance can be extended into and moved out of the side-blown smelting furnace through the opening.

8. The smelting equipment according to claim 1, characterized in that: The smelting equipment includes a plurality of the thermal insulation spray guns.

9. The smelting equipment according to claim 1, characterized in that: The first discharge assembly includes a discharge drive and a gate. The discharge drive is connected to the gate to drive the gate to move relative to the side-blown smelting furnace. During the movement of the gate, the production smoke exhaust port can be opened and closed.

10. The smelting equipment according to claim 1, characterized in that: The converting device is one of a multi-lance top-blowing converting furnace, a horizontal converter, a flash converting furnace, an Ausmelt converting furnace, an ISA converting furnace, and a bottom-blowing converting furnace.

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