Blowing device and smelting equipment

Abstract

The utility model discloses a blowing device. The blowing device comprises a multi-spray-gun top blowing converting furnace, a first discharging assembly, a second discharging assembly and a heat preservation spray gun. The multi-spray-gun top-blowing converting furnace is provided with a first smoke outlet and a second smoke outlet; the first discharge assembly and the second discharge assembly are arranged corresponding to the first smoke outlet and the second smoke outlet respectively; the heat preservation spray gun can heat the interior of the multi-spray-gun top-blowing converting furnace. In the normal production process, the first smoke outlet is opened, the second smoke outlet is closed, and smoke is exhausted through the first smoke outlet; and when a fault occurs, the first smoke exhaust port is closed, the second smoke exhaust port is opened, melt in the multi-spray-gun top-blowing converting furnace is heated and subjected to heat preservation through the heat preservation spray gun, and smoke is exhausted through the second smoke exhaust port. Due to the fact that the heat preservation spray gun can heat the melt, the temperature of the melt can be prevented from being excessively reduced, it is ensured that the freezing degree of the melt meets the requirements of air supply and feeding after fault processing is completed, and therefore the situation of dead furnace is avoided. The utility model further discloses smelting equipment.

Description

TECHNICAL FIELD

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

[0002] The top blowing smelting process is a current mainstream blowing process, and is widely applied to the field of non-ferrous metal pyrometallurgy, such as copper smelting. When the existing top blowing smelting process needs to be stopped for oxygen and material due to equipment failure, the furnace body cooling water cannot be cut off, and usually needs to be insulated 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 the existing top blowing smelting equipment 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 when the fault occurs. In order to solve the technical problem, a blowing device and smelting equipment are provided, 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 blowing device comprises:

[0006] A multi-lance top blowing smelting furnace is provided with a first smoke outlet and a second smoke outlet;

[0007] A first discharge assembly and a second discharge assembly are respectively arranged corresponding to the first smoke outlet and the second smoke outlet, the first discharge assembly is used for opening and closing the first smoke outlet, and the second discharge assembly is used for opening and closing the second smoke outlet;

[0008] An insulation lance is arranged corresponding to the multi-lance top blowing smelting furnace, and the insulation lance can heat the multi-lance top blowing smelting furnace.

[0009] In normal production process, the first smoke outlet is opened and the second smoke outlet is closed, and the flue gas is discharged through the first smoke outlet; when the blowing device is out of order and oxygen and material are stopped, the first smoke outlet is closed and the second smoke outlet is opened, and the heat preservation lance is used to heat and preserve the melt in the multi-lance top blowing converter, and the generated flue gas is discharged through the second smoke outlet. Since the heat preservation lance can heat the melt, the temperature drop of the melt can be effectively avoided, and the freezing degree of the melt when the fault is handled can meet the requirements of air supply and material feeding, so that the situation of dead furnace can be effectively avoided. In addition, the melt does not need to be emptied, and the furnace does not need to be restarted after the fault is handled, so that the downtime is shortened and the cost is reduced.

[0010] Further, the blowing device further comprises a bypass flue, one end of the bypass flue being connected to the second smoke outlet of the multi-lance top blowing converter.

[0011] 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 multi-lance top blowing converter and the fixed section, and during the movement of the movable section, one end of the movable section away from the fixed section can be connected to and separated from the second smoke outlet of the multi-lance top blowing converter.

[0012] Further, the blowing device 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.

[0013] 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.

[0014] Further, the heat preservation lance is configured to be operatively extended into or moved out of the multi-lance top blowing converter to heat the multi-lance top blowing converter when the heat preservation lance is extended into the multi-lance top blowing converter.

[0015] Further, an opening is arranged at the top or side of the multi-lance top blowing converter, and the heat preservation lance can be extended into and moved out of the multi-lance top blowing converter through the opening.

[0016] Further, the blowing device comprises a plurality of heat preservation lances.

[0017] A smelting equipment comprises a melting device and a blowing device as described above, and the melting device is arranged on the upstream side of the multi-lance top blowing converter.

[0018] Further, the melting device is one of a side-blown smelting furnace, a flash smelting furnace, a bottom-blown smelting furnace, an Ausmelt furnace and an Isa furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application.

[0020] Figure 1 A schematic structural diagram of a blowing device provided in one embodiment of the present application;

[0021] Figure 2 A schematic structural diagram of smelting equipment provided in another embodiment of the present application.

[0022] Description of labels:

[0023] 100. Converting device; 110. Multi-lance top-blowing converting furnace; 111. First smoke exhaust port; 112. Second smoke exhaust port; 113. Furnace body; 1131. Slag discharge port; 1132. Product discharge port; 114. Main flue; 115. Converting lance; 116. Product chute; 120. Insulation lance; 130. Bypass flue; 200. Smelting device. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0026] In order to facilitate understanding of the technical solution of the present application, the existing top blowing process is further described here:

[0027] In existing top-blowing processes, when equipment failures cause oxygen and material outages, in addition to adding a layer of coal for insulation, another approach is to drain the melt to avoid the risk of a furnace shutdown. This method can be used when the failure lasts for a long time. However, draining the melt requires restarting the furnace after troubleshooting, which is time-consuming, resulting in extended downtime and high costs.

[0028] To address the aforementioned technical issues, the present application provides, on the one hand, a blowing device for smelting non-ferrous metals. This blowing device, in the event of a malfunction, can maintain the temperature of the melt within the furnace until the malfunction is resolved, ensuring that the melt remains frozen to a sufficient level for restarting air supply and material processing, thereby avoiding furnace shutdown. Furthermore, this blowing device eliminates the need to restart the furnace after malfunction resolution, thereby shortening production downtime and reducing costs.

[0029] like Figure 1 As shown, the converting device 100 includes a multi-lance top-blowing converting furnace 110 , a first discharge assembly, a second discharge assembly, and a heat-insulating lance 120 .

[0030] The multi-lance top-blown converting furnace 110 is equipped with a first smoke exhaust port 111 and a second smoke exhaust port 112. The first smoke exhaust port 111 is used to exhaust smoke during normal production. A first exhaust assembly and a second exhaust assembly are provided corresponding to the first and second smoke exhaust ports 111, 112, respectively. The first exhaust assembly is used to open and close the first smoke exhaust port 111, and the second exhaust assembly is used to open and close the second smoke exhaust port 112. A heat-insulating lance 120 is provided corresponding to the multi-lance top-blown converting furnace 110 and is capable of heating the interior of the multi-lance top-blown converting furnace 110.

[0031] Using the aforementioned blowing device 100, during normal production, the first smoke exhaust port 111 is open and the second smoke exhaust port 112 is closed, with flue gas discharged through the first smoke exhaust port 111. If the blowing device 100 malfunctions and oxygen and material are shut off, the first smoke exhaust port 111 is closed and the second smoke exhaust port 112 is opened. The melt in the multi-lance top-blowing blowing furnace 110 is heated and insulated by the heat-insulating spray gun 120, and the resulting flue gas is discharged through the second smoke exhaust port 112. Because the heat-insulating spray gun 120 can heat the melt, it can effectively prevent the melt temperature from dropping too much, ensuring that the melt is frozen to the level required for air supply and feeding when the fault is resolved, thereby effectively preventing the furnace from freezing. Furthermore, the melt does not need to be emptied, and the furnace does not need to be restarted after the fault is resolved, shortening production downtime and reducing costs.

[0032] It needs to be explained that the flue gas discharged from the first flue gas outlet 111 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 120, if the flue gas generated by heat preservation is discharged through the first flue gas outlet 111, 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 second flue gas outlet 112 is used to discharge the flue gas in the heat preservation process to other devices, such as directly discharging to a flue gas treatment device and then exhausting, so as to avoid affecting the waste heat boiler and the electric dust collector and the like, prolong the service life of the equipment, and avoid production accidents.

[0033] In one embodiment, the multi-lance top blowing converter 110 comprises a furnace body 113 connected with the downstream side converter 100 and a main flue 114 connected with the furnace body 113, and the main flue 114 is provided with a first flue gas outlet 111 and a second flue gas outlet 112. The first flue gas outlet 111 and the second flue gas outlet 112 can be located on the same side surface of the main flue 114 or on different two surfaces respectively. Specifically, in the embodiment shown in the figure, the main flue 114 is located at the top of the furnace body 113, the first flue gas outlet 111 is located at the side of the main flue 114, and the second flue gas outlet 112 is located at the top of the main flue 114. Figure 1

[0034] Further, the multi-lance top blowing converter 110 further comprises a converter lance 115 arranged in the furnace body 113 for inputting oxygen and fuel and the like into the furnace body 113.

[0035] In one embodiment, the furnace body 113 is provided with a charging port, a slag discharge port 1131 and a product discharge port 1132. The charging port is located at the top of the furnace body 113, the slag discharge port 1131 is located at the side of the furnace body 113, and the product discharge port 1132 is located at the bottom of the furnace body 113. The slag discharge port 1131 is used for discharging waste slag, and the product discharge port 1132 is used for discharging products to the downstream. For example, in copper smelting, the product discharged from the product discharge port 1132 is crude copper. At the same time, in order to realize the smooth discharge of the product, a product chute 116 corresponding to the product discharge port 1132 is arranged at the downstream side of the furnace body 113 to realize the flow of the product.

[0036] ​In one embodiment, the heat preservation lance 120 is configured to be operatively extended into or moved out of the multi-lance top blown converter 110 to heat the multi-lance top blown converter 110 when extended into the multi-lance top blown converter 110. Optionally, the top or side of the multi-lance top blown converter 110 is provided with an opening through which the heat preservation lance 120 can be extended into and moved out of the multi-lance top blown converter 110, for example, the heat preservation lance 120 is extended into and moved out of the multi-lance top blown converter 110 through the opening in the top. Of course, in other embodiments, the heat preservation lance 120 can be fixed on the furnace body 113 as long as the reliability of the heat preservation lance 120 is ensured, i.e. the heat preservation lance 120 is not affected by the high temperature in the multi-lance top blown converter 110, which is not limited herein.

[0037] It should be noted that, in the preferred embodiment, the opening through which the heat preservation lance 120 is extended into and moved out of is the charging opening in the furnace body 113, so that no additional opening needs to be provided in the furnace body 113 to avoid affecting the temperature in the furnace body 113. Meanwhile, in the present embodiment, the heat preservation lance 120 heats and preserves the melt by firing, and the type of fuel can be gas, liquid or solid.

[0038] In one embodiment, the blowing device 100 comprises a plurality of heat preservation lances 120, which act together to improve the heating and preserving effect on the melt. In the case where all the heat preservation lances 120 are extended into and moved out of the multi-lance top blown converter 110 through the opening, some of the heat preservation lances 120 can be extended into and moved out of the multi-lance top blown converter 110 through the charging opening, and the other heat preservation lances 120 can be extended into and moved out of the multi-lance top blown converter 110 through the additional opening.

[0039] In one embodiment, the first discharging assembly comprises a discharging driving member and a shutter, the discharging driving member is connected with the shutter to drive the shutter to move relative to the multi-lance top blown converter 110, and the shutter can open and close the first smoke outlet 111 during the movement. Similarly, the second discharging assembly can also comprise a discharging driving member and a shutter to open and close the second smoke outlet 112.

[0040] In combination Figure 1 It should be noted that, when the smoke outlet (the first smoke outlet 111 and / or the second smoke outlet 112) is located at the top of the main flue 114, only the shutter can be provided, which is arranged on the top of the main flue 114 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 114, the shutter is preferably driven to move by the discharging driving member.

[0041] In one embodiment, the converting apparatus 100 further includes a bypass flue 130. One end of the bypass flue 130 interfaces with the second exhaust port 112 of the multi-lance top-blowing converting furnace 110, and the other end can be connected to a flue gas treatment device, such as a flue gas collection system, to exhaust the treated flue gas. Furthermore, the bypass flue 130 includes a housing and a refractory layer. The housing includes a flue for flue gas to pass through, and the refractory layer covers the inner wall of the flue of the housing.

[0042] In one embodiment, the bypass flue 130 includes a movable section and a fixed section that are interconnected. The movable section is movably arranged relative to the multi-lance top-blowing refining furnace 110, and the fixed section is fixedly arranged relative to the multi-lance top-blowing refining furnace 110. 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 second smoke exhaust port 112 of the multi-lance top-blowing refining furnace 110.

[0043] It can be understood that when the second smoke exhaust port 112 is opened at the top of the main flue 114, the second discharge component is a gate; during normal production, the gate cover is set at the second smoke exhaust port 112 to close the second smoke exhaust port 112; during the heating and insulation process, the gate is removed, and then the movable section is moved to dock with the second smoke exhaust port 112, so that the smoke generated by heating and insulation enters the bypass flue 130 and is transported to the smoke treatment device through the bypass flue 130.

[0044] In addition, it should be noted that, in other embodiments, the bypass flue 130 may also be fixedly connected to the main flue 114. In this case, the second exhaust assembly is preferably arranged in the main flue 114 and includes an exhaust drive and a gate.

[0045] In one embodiment, the blowing device 100 further includes a water-cooling jacket disposed in the bypass flue 130 for cooling the bypass flue 130 to prevent damage to the bypass flue 130 due to high temperatures. Furthermore, the blowing device 100 further includes a flue gas cooler connected to the bypass flue 130 to cool the flue gas input into the bypass flue 130.

[0046] It should be noted that, to reduce costs, the water cooling jacket is located in a location in the bypass flue 130 where there is a risk of high temperatures. Furthermore, in this embodiment, the flue gas cooler utilizes a spray cooler, which sprays a relatively low-temperature spray into the bypass flue 130 to mix with the flue gas, thereby cooling the flue gas.

[0047] In view of the description in the above embodiments, in order to facilitate understanding of the technical solution of this application, Figure 1 The working process of the blowing device 100 in the above embodiment is described as follows:

[0048] For example, in copper smelting, in normal production process, the first exhaust port 111 on the main flue 114 is opened, and the second exhaust port 112 is closed; the flue gas generated by the multi-lance top blowing converter 110 is discharged through the first exhaust port 111 to the downstream waste heat boiler for heat recovery, and then is treated by electric precipitation, and then the flue gas is sent to the acid making system. When a device failure occurs, the first exhaust assembly closes the first exhaust port 111, removes the shutter on the second exhaust port 112, and moves the movable section to be in butt joint with the second exhaust port 112. Then, a plurality of heat preservation lances 120 are inserted into the multi-lance top blowing converter 110 to heat and preserve the melt by the heat preservation lances 120, and a temperature detector is arranged to monitor the temperature of the melt, so as to adjust the output of the heat preservation lances 120 according to the temperature of the melt. The flue gas generated by the heating and preservation is cooled to below 200°C by the flue gas cooler when passing through the bypass flue 130, and then is output to the ring gas collection system. After the failure is handled, the heat preservation lances 120 are removed, the bypass flue 130 is removed, the first exhaust port 111 is opened, and the production is continued.

[0049] On the other hand, based on the blowing device 100 in the above embodiment, the application further provides a smelting equipment. As shown in the figure, the smelting equipment comprises the melting device 200 and the blowing device 100, the melting device 200 is arranged on the upstream side of the multi-lance top blowing converter 110, and the melting device 200 is one of a side-blown converter, a flash smelting furnace, a bottom-blown converter, an Ausmelt furnace and an Isa furnace. Figure 2

[0050] In summary, the blowing device 100 and the smelting equipment provided by the application have at least the following advantages:

[0051] 1. The melt is heated and preserved by the heat preservation lances 120, so that the freezing degree of the melt caused by too much temperature drop of the melt does not meet the requirement of air supply and charging, 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 the heating and preservation is discharged through the bypass flue 130, which does not affect the waste heat boiler and the electric precipitation, thereby prolonging the service life of the equipment.

[0054] Although the embodiments of the application have been shown and described, it can be understood by those skilled 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 application, and the scope of the application is defined by the appended claims and their equivalents.​

Claims

1. A blowing device, characterized in that: include: Multi-lance top-blowing converting furnace with first and second exhaust ports; A first exhaust component and a second exhaust component are respectively provided corresponding to the first smoke exhaust port and the second smoke exhaust port, the first exhaust component is used to open and close the first smoke exhaust port, and the second exhaust component is used to open and close the second smoke exhaust port; The heat-insulating spray gun is provided corresponding to the multi-lance top-blowing converting furnace, and the heat-insulating spray gun can heat the multi-lance top-blowing converting furnace.

2. The blowing device according to claim 1, characterized in that The converting device further includes a bypass flue, one end of which is connected to the second smoke exhaust port of the multi-lance top-blowing converting furnace.

3. The blowing device 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 multi-lance top-blowing refining 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 second smoke exhaust port of the multi-lance top-blowing refining furnace.

4. The blowing device according to claim 2, characterized in that: The blowing device 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 blowing device 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 blowing device according to claim 1, characterized in that The insulation lance is configured to be operably extended into or moved out of the multi-lance top-blowing converting furnace, so as to heat the multi-lance top-blowing converting furnace when extended into the multi-lance top-blowing converting furnace.

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

8. The blowing device according to claim 1, characterized in that The blowing device includes a plurality of the heat-insulating spray guns.

9. A smelting equipment, characterized in that: It comprises a smelting device and the blowing device according to any one of claims 1 to 8, wherein the smelting device is located on the upstream side of the multi-lance top-blowing blowing furnace.

10. The smelting equipment according to claim 9, characterized in that: The smelting device is one of a side-blown smelting furnace, a flash smelting furnace, a bottom-blown smelting furnace, an Ausmelt furnace and an Isa furnace.

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