A top and side combined blowing oxygen-enriched smelting furnace

Abstract

The utility model discloses a same reactor top, side composite injection oxygen-enriched smelting furnace, it includes: furnace body, furnace body is equipped with fire resistance inner lining, heat exchange water jacket and shell from inside to outside in proper order, the inside of furnace body has furnace bottom, and the upper side of the circumference of furnace body is equipped with a plurality of side blowing spray gun mounting hole and is close to furnace bottom, and side blowing spray gun mounting hole penetrates shell and heat exchange water jacket, and fire resistance inner lining is equipped with a plurality of groove hole that communicates side blowing spray gun mounting hole in the circumference, side blowing spray gun has a plurality of groups and is detachably connected in side blowing spray gun mounting hole, and side blowing spray gun is supplied with gas or feed through groove hole to the inside of furnace body, and the section of side blowing spray gun outside and corresponding fire resistance inner lining is equipped with copper water jacket, and copper water jacket is detachably connected in groove hole and is communicated with heat exchange water jacket pipeline, and copper water jacket is equipped with arc wall surface, and the arc wall surface of copper water jacket and the inner wall surface of fire resistance inner lining cooperate and form furnace wall, and top blowing spray gun is slidably connected on the furnace cover with hole on the top side of furnace body, and the novel structure is simple, and effectively improves metallurgical efficiency and quality.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical furnace technology, specifically relating to a composite oxygen-enriched smelting furnace with top and side injection of the same reactor. Background Technology

[0002] Currently, pyrometallurgical processes mainly employ top-blown or side-blown furnaces. However, a single top-blown furnace structure suffers from large air volume and low oxygen concentration, making it impossible to achieve ultra-oxygen-enriched smelting. The lances continuously inject pulverized coal, diesel fuel, and oxygen into the furnace bottom area under high pressure and large air volume, resulting in short lance lifespan, significant erosion of the furnace bottom refractory material, and easy damage to the refractory material. Furthermore, the single top-blown furnace structure has a large air volume, high heat loss, high dust rate, and significant metal loss. It also has reaction dead zones and uneven reaction agitation, affecting subsequent metallurgical efficiency and quality.

[0003] However, when the oxygen concentration in the process air exceeds 50%, the lifespan of the spray gun is shortened when the spray gun is used for deep spraying for an extended period of time.

[0004] In addition, the refractory material in the area corresponding to the spray gun in the side-blown furnace is not easy to arrange. This area is susceptible to erosion by the spray gun and is also prone to slag buildup, which reduces the overall service life of the furnace.

[0005] Therefore, how to provide a composite blowing oxygen-enriched smelting furnace with the same reactor top side is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides a top- and side-blown oxygen-enriched smelting furnace with the same reactor. The combined top-blowing and side-blowing mode effectively increases the oxygen concentration in the smelting process of the metallurgical furnace, increases the reaction rate and reduces the metallurgical fuel consumption. The side-blowing lance radiation zone is equipped with a copper water jacket to avoid erosion of the refractory lining near the side and to prevent slag buildup on the refractory material on that side, thereby increasing the service life of the refractory lining, extending the life of the metallurgical furnace, and improving the production efficiency of the metallurgical furnace.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a combined top and side blowing oxygen-enriched smelting furnace with the same reactor, comprising:

[0008] The furnace body is provided with a refractory lining, a hot water jacket and an outer shell in sequence from the inside to the outside. The furnace body has a furnace bottom inside. The furnace body has multiple side-blowing spray gun mounting holes on its periphery and the upper side near the furnace bottom. The side-blowing spray gun mounting holes penetrate the outer shell and the hot water jacket. The refractory lining has multiple slots in the periphery that connect to the side-blowing spray gun mounting holes.

[0009] A side-blowing spray gun is provided, with multiple sets of side-blowing spray guns detachably connected to the side-blowing spray gun mounting holes. The side-blowing spray guns supply gas or material to the furnace body through the slot holes. A copper water jacket is provided on the outside of the side-blowing spray guns and in the section corresponding to the refractory lining. The copper water jacket is detachably connected to the slot holes and connected to the heat exchange water jacket pipeline. The copper water jacket has an arc-shaped wall surface. The arc-shaped wall surface of the copper water jacket cooperates with the inner wall surface of the refractory lining to form the furnace wall.

[0010] The top-blowing spray gun is slidably connected to the perforated furnace cover on the top side of the furnace body.

[0011] The beneficial effects of this utility model are as follows: a top-blowing spray gun is installed on the top side of the furnace body, and a side-blowing spray gun is installed on the side of the furnace body. This changes the traditional single-blowing mode, increases the oxygen concentration of the metallurgical furnace, and also reduces the gas supply pressure and air volume in the single mode. This significantly reduces the amount of smelting flue gas and the heat loss carried away by a large amount of flue gas, thus reducing fuel consumption. The side-blowing spray gun and the top-blowing spray gun work together to improve the flexibility of the metallurgical process. There is no need to stop the machine when the spray gun is damaged, thus improving the metallurgical production efficiency. A copper water jacket is set in the radiation zone of the side-blowing spray gun to avoid erosion of the refractory lining near the side, thereby improving the service life of the refractory lining, extending the service life of the metallurgical furnace, and improving the production efficiency of the metallurgical furnace. In addition, the addition of the side-blowing spray gun can optimize the reaction field inside the metallurgical furnace, increase the reaction kinetic energy of the metallurgical furnace, and avoid the problems of reaction dead zones and uneven reaction agitation.

[0012] Preferably, the hot water exchange jacket is a split cylindrical hot water exchange jacket, which is formed by disassembling and connecting multiple arc-shaped blocks, and the hot water exchange jacket is connected to the outer shell by bolts.

[0013] The resulting technical benefits are: the hot water jacket is assembled, and its assembly parts have sealing gaskets to prevent water leakage at the cooling pipe interfaces; the hot water jacket can make full use of the residual heat inside the furnace and also prevent the outer shell from overheating and deforming.

[0014] Preferably, the mounting holes of the multiple side-blowing spray guns are arranged at circumferential intervals, the mounting holes of the multiple side-blowing spray guns have an angular deviation from the radial direction of the furnace body, and the multiple sets of side-blowing spray guns are arranged with a rotation angle on the periphery of the furnace body.

[0015] The resulting technical effect is that the arrangement of multiple side-blowing spray guns with rotating angles is to agitate the liquid inside the furnace, avoid dead zones in the reaction, and improve production efficiency.

[0016] Preferably, the side-blowing spray gun has a height difference of 1000mm to 1500mm from the furnace bottom.

[0017] Preferably, the side-blowing spray gun is provided with an air inlet channel, a material supply channel and a common exhaust channel. The air inlet channel and the material supply channel are respectively connected to the common exhaust channel. The air inlet channel is connected to an external air supply source and introduces oxygen-enriched air. The material supply channel is connected to an external material supply source and provides pulverized coal fuel.

[0018] The resulting technical effects are: the side-blowing nozzle can supply oxygen-enriched air or pulverized coal; it can be used for emergency feeding when the top-blowing nozzle is damaged; and when the top-blowing nozzle is in normal use, the side-blowing nozzle supplies oxygen-enriched air, which agitates the liquid in the furnace and improves metallurgical efficiency.

[0019] Preferably, the top-blown nozzle has a multi-layer sleeve structure, and the top-blown nozzle is connected to an external feeding system to spray oxygen-enriched air or oxygen-enriched pulverized coal into the furnace.

[0020] The resulting technical effect is that the top-blown nozzle has an existing casing structure, which can provide oxygen-enriched process air and pulverized coal into the furnace, and the top-blown nozzle is a non-submersible nozzle.

[0021] Preferably, the perforated furnace cover is provided with a lifting device on the top side, and the lifting end of the lifting device is connected to the top blowing gun and causes the top blowing gun to move up and down.

[0022] The resulting technical effect is that the vertical height of the top-blowing spray gun can be adjusted according to changes in the height of the molten pool and production needs. Attached Figure Description

[0023] Figure 1 This is a cross-sectional schematic diagram of a composite blowing oxygen-enriched smelting furnace with the same reactor top and side according to the present invention;

[0024] Figure 2 This is a schematic diagram of the side-blowing spray gun arrangement of a top and side composite blowing oxygen-enriched smelting furnace of the same reactor according to the present invention;

[0025] Figure 3 This is a partial structural diagram of the heat exchange jacket of a composite-jet oxygen-enriched smelting furnace with the same reactor top and side;

[0026] Figure 4 This is a schematic cross-sectional view of the copper water jacket of a composite blowing oxygen-enriched smelting furnace with the same reactor top and side according to the present invention.

[0027] 1 Furnace body, 11 Refractory lining, 12 Hot water jacket, 121 Water inlet, 122 Water outlet, 123 Tubular outlet, 13 Outer shell, 14 Furnace bottom, 2 Side blowing lance, 21 Air inlet channel, 22 Feeding channel, 23 Public exhaust channel, 3 Top blowing lance, 4 Copper water jacket, 41 Water channel, 42 Slag hanging trough. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] See appendix to this utility model Figures 1 to 4 According to an embodiment of the present invention, a combined top and side blowing oxygen-enriched smelting furnace with the same reactor includes:

[0030] The furnace body 1 is provided with a refractory lining 11, a hot water jacket 12 and an outer shell 13 in sequence from the inside to the outside. The refractory lining is made of refractory bricks. The furnace body 1 has a furnace bottom 14 inside. Multiple side-blowing spray gun mounting holes are provided on the periphery of the furnace body 1 and on the upper side near the furnace bottom 14. The side-blowing spray gun mounting holes penetrate the outer shell 13 and the hot water jacket 12. The refractory lining 11 has multiple slots in the periphery that connect to the side-blowing spray gun mounting holes.

[0031] Side-blowing spray gun 2, multiple sets of which are detachably connected to the side-blowing spray gun mounting hole. The side-blowing spray gun 2 supplies air or material into the furnace body through the slot. A copper water jacket 4 is provided on the outside of the side-blowing spray gun 2 and in the section corresponding to the refractory lining. The copper water jacket 4 is detachably connected to the slot and connected to the heat exchange water jacket pipeline. The cooling medium in the heat exchange water jacket and the copper water jacket can circulate. The copper water jacket 4 has an arc-shaped wall surface. The arc-shaped wall surface of the copper water jacket 4 cooperates with the inner wall surface of the refractory lining 11 to form the furnace wall. On the one hand, it avoids slag accumulation on the refractory lining at the side-blowing spray gun. On the other hand, it avoids erosion of the refractory lining and improves the service life of the refractory lining. Specifically, a slag groove 42 is provided on one side of the arc-shaped wall surface, and a water channel 41 is provided inside the copper water jacket.

[0032] Top-blowing nozzle 3 is slidably connected to the perforated furnace cover on the top side of the furnace body.

[0033] In other embodiments, the hot water jacket 12 is a split cylindrical hot water jacket, which is formed by disassembling and connecting multiple arc-shaped blocks. Each block group is provided with mounting lugs, which are connected to adjacent water jacket blocks. In addition, the hot water jacket blocks contain water channels, including an inlet 121, an outlet 122, and an air vent 123. The hot water jacket is connected to the outer shell 13 by bolts. The outer shell is an integral steel shell, mainly made of heat-resistant and deformation-resistant steel material.

[0034] In other specific embodiments, multiple side-blowing spray gun mounting holes are arranged at circumferential intervals, and the axial direction of multiple side-blowing spray gun mounting holes is angularly deviated from the radial direction of the furnace body. Multiple sets of side-blowing spray guns 2 are arranged around the furnace body 1 with a rotation angle. The purpose is to form a swirling agitation inside the furnace and avoid reaction dead zones.

[0035] In the specific arrangement, there is a height difference of 1500mm between the side-blowing spray gun 2 and the furnace bottom 14.

[0036] In some other embodiments, the side-blowing spray gun 2 is provided with an air inlet channel 21, a feeding channel 22 and a common exhaust channel 23. The air inlet channel 21 and the feeding channel 22 are respectively connected to the common exhaust channel 23. The air inlet channel 21 is connected to an external air supply source and introduces oxygen-enriched air, which can inject 90-99% oxygen into the furnace. The feeding channel 22 is connected to an external feeding source and provides pulverized coal fuel.

[0037] In some other specific embodiments, the top-blown nozzle 3 has a multi-layer sleeve structure, and the top-blown nozzle 3 is connected to an external feeding system and sprays oxygen-enriched air or oxygen-enriched pulverized coal into the furnace.

[0038] In other embodiments, a lifting device is provided on the top side of the perforated furnace cover. The lifting end of the lifting device is connected to the top blowing gun 3 and causes the top blowing gun 3 to move up and down. The top blowing gun system is vertically suspended above the furnace top and can move up and down according to the changes in the height of the molten pool and production needs.

[0039] During production, compressed air is introduced into the top and side blowing lances of the smelting furnace and adjusted to normal. After the adjustment is completed, the refractory material is baked. When the baking temperature reaches 1100-1200 degrees according to the heating curve, the pre-prepared clinker is put in to build the molten pool.

[0040] Lower the top-blown lance to a distance of 600-800mm from the furnace bottom, ignite the lance, and set the oxygen-enriched air and pulverized coal quantities. Continue igniting the side-blown lances sequentially, adjusting the oxygen quantity of each lance to the set value to ensure uniform pressure and flow rate for each lance. During normal smelting, the side-blown lances maintain a constant oxygen pressure, while the oxygen flow rate can be adjusted according to production needs. During normal smelting, the top-blown lances' oxygen-enriched air and oxygen-enriched pulverized coal quantities are adjusted according to the composition and quantity of the material fed into the furnace.

[0041] This device can achieve a combined top-blowing and side-blowing mode with its top-blowing and side-blowing spray guns. When the top-blowing spray gun is burned out or malfunctions, it can switch from the combined top-blowing and side-blowing mode to the side-blowing mode to handle the fault without affecting production. When the side-blowing spray gun is burned out or malfunctions, it can switch from the combined top-blowing and side-blowing mode or the side-blowing mode to the top-blowing mode or the top-blowing mode plus a partial side-blowing mode without affecting production.

[0042] When it is necessary to replace the side-blown spray gun, slag should be discharged from the top and side oxygen-enriched smelting furnaces of the same reactor to lower the molten pool. The oxygen control valve of the spray gun to be replaced should be closed. Other side-blown spray guns and top-blown spray guns should continue to operate normally. The top and side oxygen-enriched smelting furnaces of the same reactor should continue to produce, and the replacement should be carried out online.

[0043] The combination of top and side blowing in this device solves the problem that the continuous long-term injection of large amounts of oxygen-enriched air and pulverized coal into the furnace bottom by the spray gun in a single top-blown furnace causes great impact on the furnace bottom refractory material and affects the service life of the top-blown furnace.

[0044] The air volume of the original single-jet blowing structure mode can be increased from 30,000 to 25,000 Nm. 3 / h reduced to 9000-11000 Nm 3 / h, significantly reducing the amount of smelting flue gas and the heat loss carried away by a large amount of flue gas, thus reducing fuel consumption.

[0045] This device optimizes the refractory material around the radiation area of ​​the side-blown spray gun by replacing it with copper water jacket elements. The remaining non-radiation areas are lined with a certain thickness of refractory material, and the outside is inlaid and sealed with copper water jackets with good cooling effect. This solves the long-standing shortcomings of traditional metallurgical furnace structures, extends the service life of metallurgical furnaces, and improves the production efficiency of metallurgical furnaces.

[0046] This device is a new type of smelting furnace capable of handling the collection of primary metal materials, the co-processing of multiple metals, the recycling of slag materials, and municipal waste. It has a wide range of applications and strong potential for promotion.

[0047] The apparatus and methods disclosed in the embodiments are described simply because they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the method section.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A combined top and side blowing oxygen-enriched smelting furnace with the same reactor, characterized in that, include: The furnace body (1) is provided with a refractory lining (11), a hot water jacket (12) and an outer shell (13) in sequence from the inside to the outside. The furnace body (1) has a furnace bottom (14) inside. The furnace body (1) has multiple side-blowing spray gun mounting holes on its periphery and near the upper side of the furnace bottom (14). The side-blowing spray gun mounting holes penetrate the outer shell (13) and the hot water jacket (12). The refractory lining (11) has multiple slots in the periphery that connect to the side-blowing spray gun mounting holes. Side-blowing spray gun (2), the side-blowing spray gun (2) has multiple sets and is detachably connected in the side-blowing spray gun mounting hole. The side-blowing spray gun (2) supplies gas or material to the furnace body through the slot. The side-blowing spray gun (2) is provided with a copper water jacket (4) on the outside of the side-blowing spray gun (2) and in the section corresponding to the refractory lining. The copper water jacket (4) is detachably connected in the slot and connected to the heat exchange water jacket pipeline. The copper water jacket (4) has an arc-shaped wall surface. The arc-shaped wall surface of the copper water jacket (4) cooperates with the inner wall surface of the refractory lining (11) to form the furnace wall. Top-blowing nozzle (3) is slidably connected to the perforated furnace cover on the top side of the furnace body.

2. The oxygen-enriched smelting furnace with top and side combined blowing in the same reactor as described in claim 1, characterized in that, The hot water jacket (12) is a split cylindrical hot water jacket, which is formed by disassembling and connecting multiple arc-shaped blocks. The hot water jacket is connected to the outer shell (13) by bolts.

3. The oxygen-enriched smelting furnace with top and side combined blowing in the same reactor as described in claim 1, characterized in that, Multiple side-blowing spray gun mounting holes are arranged circumferentially at intervals, and the axial direction of multiple side-blowing spray gun mounting holes is angularly deviated from the radial direction of the furnace body. Multiple sets of side-blowing spray guns (2) are arranged around the furnace body (1) with a rotation angle.

4. The oxygen-enriched smelting furnace with top and side combined blowing in the same reactor according to claim 1, characterized in that, The side-blowing spray gun (2) has a height difference of 1000mm to 1500mm from the furnace bottom (14).

5. The oxygen-enriched smelting furnace with top and side combined blowing in the same reactor as described in claim 1, characterized in that, The side-blowing spray gun (2) is provided with an air inlet channel (21), a material supply channel (22) and a common exhaust channel (23). The air inlet channel (21) and the material supply channel (22) are respectively connected to the common exhaust channel (23). The air inlet channel (21) is connected to an external air supply source and oxygen-enriched air is introduced. The material supply channel (22) is connected to an external material supply source and provides pulverized coal fuel.

6. The oxygen-enriched smelting furnace with top and side combined blowing in the same reactor according to claim 1, characterized in that, The top-blowing nozzle (3) has a multi-layer sleeve structure. The top-blowing nozzle (3) is connected to an external feeding system and sprays oxygen-enriched air or oxygen-enriched pulverized coal into the furnace.

7. The oxygen-enriched smelting furnace with top and side combined blowing in the same reactor according to claim 1, characterized in that, The perforated furnace cover is provided with a lifting device on the top side. The lifting end of the lifting device is connected to the top blowing gun (3) and causes the top blowing gun (3) to move up and down.

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