Slurry type feeding spray gun of chalcocite fluidized bed roaster

Abstract

The utility model discloses a slurry type feeding spray gun of a chalcocite fluidized bed roaster, which comprises a gun nozzle, a gun body, a feeding pipeline and an air supply component, the first end of the gun body is connected with the gun nozzle, the second end of the gun body is connected with the air supply component, and the gun nozzle is provided with a first pressurizing part for increasing the pressure of slurry; the feeding pipeline is obliquely arranged on one side of the gun body, and a discharging port of the feeding pipeline is connected with the gun body and used for feeding slurry into the gun body. And the gas supply assembly comprises a gas ejector pipe, the gas ejector pipe is provided with a second pressurizing part used for increasing the gas pressure, and a gas outlet of the gas ejector pipe is opposite to the discharging port of the feeding pipeline and used for mixing the gas flow with the slurry and spraying the slurry out of the gun nozzle. The first pressurizing part is arranged on the gun nozzle, the second pressurizing part is arranged on the gas ejector pipe and the like, so that the effects of reducing gas supply pressure, reducing abrasion of slurry to the spray gun, reducing adhesion of the slurry on the inner cavity of the gun body and the like are achieved, and the effect of prolonging the service life of the spray gun is achieved.

Description

Technical Field

[0001] This utility model relates to the field of smelting equipment technology, and in particular, to a slurry feed nozzle for a chalcocite fluidized bed roasting furnace. Background Technology

[0002] There are two feeding methods in fluidized bed roasting: dry and wet. Dry feeding involves using a dried concentrate (generally with a moisture content below 10%), conveyed by a belt to a disc feeder. The concentrate is then evenly fed into a throwing machine positioned in front of the furnace, which directly throws the material into the furnace through the feed inlet. Wet feeding involves preparing a slurry with a concentration of 70% or higher, pumping the slurry to a spray gun, and then spraying the slurry into the roasting furnace. In the slurry-feed fluidized bed roasting process, the feeding spray gun is a crucial feeding device. Its stable operation is essential for the stable operation of fluidized bed roasting. The function of the slurry feeding spray gun is to evenly and stably feed the slurry into the roasting furnace, thereby achieving uniform feeding. During the production process, spray guns are consumable parts, especially the nozzles, which need to be replaced every 30 calendar days in daily production. At the same time, depending on the actual production situation, spray gun clogging often occurs. How to reduce clogging and facilitate spray gun unblocking are key concerns in actual production.

[0003] Patent CN215572182U discloses a fluidized bed roasting furnace slurry feeding nozzle, including a nozzle, a reducer, a spray pipe, a slurry pipe, and an air compressor pipe. The tail end of the spray pipe is connected to the air compressor pipe, and its sidewall is connected to the inclined slurry pipe. The front end of the spray pipe is connected to the reducer, and the nozzle is connected to the reducer at a certain angle. This patented nozzle uses a wear-resistant alloy and features a reducer and a 30° differential diameter design. However, this design results in high nozzle resistance, rapid wear of the nozzle by the slurry, short service life, and susceptibility to clogging.

[0004] Patent CN101169309A discloses a slurry feeding spray gun for a fluidized bed roasting furnace. Based on actual production conditions, the patent specifies that the spray gun has a high working pressure. When the working pressure is too low, the slurry is sprayed unevenly, failing to meet the requirement of uniform material distribution in the roasting furnace. Furthermore, the spray gun has a lifespan of only 15-20 days and needs to be replaced frequently, resulting in high costs.

[0005] Patent CN213421866U discloses an explosion-proof solid particle spray gun. The nozzle of this spray gun is a variable diameter constriction type, which is welded to the spray gun housing channel or integrally cast. This type of nozzle has the problems of easy clogging and short service life. Utility Model Content

[0006] This invention provides a slurry feed nozzle for a chalcocite fluidized bed roaster to solve the technical problem of short service life of existing slurry feed nozzles.

[0007] According to one aspect of this utility model, a slurry feeding nozzle for a chalcocite fluidized bed roaster is provided, comprising a nozzle, a nozzle body, a feeding pipe, and an air supply assembly. A first end of the nozzle body is connected to the nozzle, and a second end of the nozzle body is connected to the air supply assembly. The nozzle body is provided with a first pressurizing section for increasing the slurry pressure. The feeding pipe is inclinedly disposed on one side of the nozzle body, and its outlet is connected to the nozzle body for feeding the slurry into the nozzle body. The air supply assembly includes a jet pipe, which is provided with a second pressurizing section for increasing the gas pressure. The outlet of the jet pipe is opposite to the outlet of the feeding pipe, for mixing the gas with the slurry and spraying the slurry out from the nozzle.

[0008] Furthermore, the first boosting part is a variable diameter structure disposed inside the nozzle, used to make the inner diameter of the first boosting part smaller than the inner diameter of the region away from the first boosting part.

[0009] Furthermore, the first pressurizing part is disposed in the middle of the nozzle, such that the area from the connection end of the nozzle to the first pressurizing part forms a structure in which the inner cavity diameter gradually decreases from large to small, and the area from the first pressurizing part to the nozzle nozzle end forms a structure in which the inner cavity diameter gradually increases from small to large.

[0010] Furthermore, the minimum diameter of the first pressurization section is 0.55-0.65 times the diameter of the gun body.

[0011] Furthermore, the first end of the feeding pipe is detachably connected to the gun body, and the second end of the feeding pipe is used to connect to the feeding device.

[0012] Furthermore, the axis of the feed pipe extending from the outlet intersects the axis of the jet pipe extending from the air outlet, with an included angle of 70-80°.

[0013] Furthermore, the air supply assembly also includes an air supply pipe, the first end of which is detachably connected to the jet pipe, and the second end of which is used to connect to a compressed air device via a pipeline.

[0014] Furthermore, the jet pipe also includes a variable diameter section, which forms a variable diameter structure from the connection with the air supply pipe to the second pressurization section with the diameter gradually decreasing, and the second pressurization section extends above the outlet of the feed pipe.

[0015] Furthermore, the inner diameter of the second pressurization section is 0.3-0.4 times the inner diameter of the air supply pipe.

[0016] Furthermore, the nozzle, gun body, and gas supply assembly are all on the same horizontal plane.

[0017] This utility model has the following beneficial effects:

[0018] In the slurry feed nozzle of the chalcocite fluidized bed roaster of this invention, the nozzle is equipped with a first pressurization section to increase the pressure of the slurry. This increases the pressure of the slurry within the first pressurization section, causing the slurry to disperse and spray out through fluid action after leaving the first pressurization section, facilitating slurry atomization and altering the slurry's flow characteristics. The feed pipe is inclined and positioned on one side of the nozzle body, with its outlet connected to the nozzle body, for feeding the slurry into the nozzle body. The air outlet of the jet pipe is positioned opposite the outlet of the feed pipe, allowing the slurry to enter the vortex of the supplied gas after entering the nozzle, providing a certain physical stirring effect on the slurry and increasing its flow characteristics. Kinetic energy facilitates timely slurry ejection, reduces the likelihood of slurry adhesion and blockage within the gun's internal cavity, and increases the gun's service life. The air jet pipe is equipped with a second pressurizing section to increase gas pressure, which can increase the supply pressure a second time, change the gas flow direction, and have a certain stirring effect on the slurry, which is beneficial for slurry ejection. This utility model, by setting a first pressurizing section on the nozzle, a second pressurizing section on the air jet pipe, and an inclined arrangement between the supply pipe and the gun body, jointly achieves the effects of reducing supply pressure, reducing slurry wear on the gun, reducing slurry adhesion within the gun's internal cavity, and improving slurry ejection efficiency, thus jointly extending the service life of the spray gun.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. These will be further described in detail below. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] In the diagram: 1. Nozzle; 2. Gun body; 3. Feed pipe; 4. Air supply assembly; 5. Jet pipe; 6. First pressurization section; 7. Second pressurization section; 8. Connecting end; 9. Nozzle end; 10. Air supply pipe; 11. Variable diameter section. Detailed Implementation

[0023] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0024] See Figure 1An embodiment of the first aspect of this utility model provides a slurry feeding nozzle for a chalcocite fluidized bed roaster, comprising a nozzle 1, a nozzle body 2, a feeding pipe 3, and an air supply assembly 4. The first end of the nozzle body 2 is connected to the nozzle 1, and the second end of the nozzle body 2 is connected to the air supply assembly 4. The nozzle 1 is provided with a first pressurizing part 6 for increasing the pressure of the slurry. The feeding pipe 3 is inclinedly disposed on one side of the nozzle body 2, and the outlet of the feeding pipe 3 is connected to the nozzle body 2 for feeding the slurry into the nozzle body 2. The air supply assembly 4 includes a jet pipe 5, which is provided with a second pressurizing part 7 for increasing the gas pressure. The outlet of the jet pipe 5 is disposed opposite to the outlet of the feeding pipe 3 for mixing the airflow with the slurry and spraying the slurry out from the nozzle 1.

[0025] The nozzle 1 and the gun body 2 are connected by a fixed connection or a detachable connection. For a fixed connection, welding is preferred; for a detachable connection, flange connection is preferred, but other suitable connection methods can also be used. The inner cavities of the nozzle 1 and the gun body 2 are arranged on the same horizontal line, reducing the resistance to the nozzle 1 when the slurry is sprayed, reducing wear on the nozzle 1, and extending its service life. A first pressure boosting section 6 is provided on the nozzle 1. The first pressure boosting section 6 can be a structure with a diameter smaller than the inner diameter of other areas of the nozzle 1, used to increase the pressure of the slurry. The first pressure boosting section 6 can be located at the connection end 8 between the nozzle 1 and the gun body 2, or at the middle of the nozzle 1, or at the outlet of the nozzle 1. In this embodiment, the first pressure boosting section 6 is located at the middle of the nozzle 1, forming a variable diameter structure where the inner diameter of the nozzle 1 gradually narrows from both ends to the middle, increasing the pressure of the slurry, dispersing the slurry during spraying, and improving the atomization effect of the slurry. The angle between the feed pipe 3 and the gun body 2 is less than 90°, and the outlet of the feed pipe 3 is opposite to the outlet of the jet pipe 5. This allows the slurry to enter the vortex of the airflow after entering the gun body 2, which is beneficial for the timely ejection of the slurry. The jet pipe 5 is provided with a second pressurizing section 7. The diameter of the second pressurizing section 7 is smaller than the diameter of other areas of the jet pipe 5, which is used to increase the gas pressure, thereby improving the stirring effect of the gas on the slurry.

[0026] In the slurry feed nozzle of the chalcocite fluidized bed roaster of this invention, the nozzle 1 is equipped with a first pressurizing section 6 to increase the pressure of the slurry. This increases the pressure within the first pressurizing section 6, allowing the slurry to disperse and spray out through fluid action after leaving the first pressurizing section 6, facilitating slurry atomization and altering its flow characteristics. An angle is formed between the feed pipe 3 and the nozzle body 2, and the outlet of the feed pipe 3 is positioned opposite the outlet of the air jet pipe 5. This allows the slurry to enter the vortex of the airflow after entering the nozzle, providing a certain degree of physical stirring and increasing the slurry's kinetic energy, which is beneficial for timely spraying and reduces material loss. The probability of slurry sticking and clogging inside the gun body 2 is reduced, increasing the service life of the spray gun. The air jet pipe 5 is equipped with a second pressurizing part 7 to increase the gas pressure, which can increase the gas supply pressure a second time, change the gas flow direction, and have a certain stirring effect on the slurry, which is conducive to the slurry spraying. This utility model, by setting a first pressurizing part 6 on the nozzle 1, setting a second pressurizing part 7 on the air jet pipe 5, and adjusting the angle between the supply pipe 3 and the gun body 2, can jointly achieve the effects of reducing the gas supply pressure, reducing the wear of the spray gun by the slurry, reducing the adhesion of the slurry on the inner cavity of the gun body 2, and improving the slurry spraying efficiency, thus jointly achieving the effect of extending the service life of the spray gun.

[0027] In an embodiment of this utility model, the first pressurizing part 6 is a variable diameter structure disposed inside the nozzle 1, used to make the inner diameter of the first pressurizing part 6 smaller than the inner diameter of the region away from the first pressurizing part 6. By designing the nozzle 1 to first narrow and then widen at the pipe diameter through physical structure, the pressure of the slurry is increased when narrowing, and the slurry is dispersed and sprayed out through fluid action when widening, which facilitates slurry atomization.

[0028] In this embodiment of the invention, the first pressurizing part 6 is disposed in the middle of the nozzle 1, such that the area from the connecting end 8 of the nozzle 1 to the first pressurizing part 6 forms a structure in which the inner cavity diameter gradually decreases from large to small, while the area from the first pressurizing part 6 to the nozzle end 9 forms a structure in which the inner cavity diameter gradually increases from small to large. The nozzle 1 forms a flow channel structure that gradually narrows from the end to the middle and gradually expands from the middle to the end. The inner cavity diameter gradually decreases from the connecting end 8 to the first pressurizing part 6, forming an accelerating flow channel and increasing the flow rate of the slurry. The gradual increase in the inner cavity diameter from the first pressurizing part 6 to the nozzle 1 reduces the outlet pressure, reduces the direct impact of the slurry on the nozzle, and reduces the nozzle wear rate. Simultaneously, the variable diameter structure optimizes the shear force of the fluid, allowing the slurry to be dispersed and sprayed out, facilitating slurry atomization.

[0029] In an embodiment of this invention, the minimum diameter of the first pressurizing section 6 is 0.55-0.65 times the diameter of the gun body 2. This diameter ratio ensures that the flow rate and pressure are in an optimal balance range, reducing pressure loss and compressed air consumption.

[0030] In an embodiment of this utility model, the first end of the feeding pipe 3 is detachably connected to the gun body 2, and the second end of the feeding pipe 3 is used to connect to the feeding device. The feeding pipe is detachably connected to the gun body for easy cleaning or replacement. The feeding pipe 3 is inclined to the gun body 2 to avoid material accumulation. The feeding device transports the slurry to the gun body 2 through the feeding pipe 3, reducing the risk of blockage.

[0031] In an embodiment of this invention, the axis of the feeding pipe 3 extending from the outlet intersects the axis of the jet pipe 5 extending from the air outlet, with an included angle of 70-80°. By optimizing the angle between the feeding pipe 3 and the gun body 2, the slurry and compressed air form a swirling flow within the spray gun, enhancing the mixing efficiency of the gas-solid two-phase mixture and increasing the kinetic energy of the slurry. This facilitates timely slurry ejection, reduces the likelihood of slurry sticking and clogging within the gun chamber, and increases the service life of the gun.

[0032] In an embodiment of this utility model, the air supply assembly 4 further includes an air supply pipe 10. The first end of the air supply pipe 10 is detachably connected to the jet pipe 5, and the second end of the air supply pipe 10 is used to connect to a compressed air device via a pipeline. The jet pipe 5 extends into the gun body 2. The air supply pipe 10 is detachably connected to the gun body 2, specifically via a flange connection, a threaded connection, or other connecting parts such as clamps. This detachable connection between the air supply pipe 10 and the gun body 2 facilitates cleaning and maintenance of the spray gun. The compressed air device provides compressed air to the spray gun, using the compressed air flow to spray the slurry from the spray gun. The compressed air pressure is 0.15-0.2 MPa, which is lower than the prior art, reducing the wear effect of the slurry on the spray gun.

[0033] In an embodiment of this invention, the jet pipe 5 further includes a variable diameter section 11. The variable diameter section 11 forms a structure where the diameter gradually decreases from its connection with the air supply pipe 10 to the second pressurizing section 7. The second pressurizing section 7 extends above the outlet of the feeding pipe 3. The tapering structure of the variable diameter section 11 increases the compressed air velocity, enhancing the shearing and crushing ability of the slurry. The second pressurizing section 7 is located directly above the outlet, where the high-speed airflow and slurry converge to form an impact atomization zone. The variable diameter structure reduces turbulent impact, the angle of the feeding pipe 3 reduces material residue, and the high-speed airflow reduces nozzle buildup; these three factors work together to extend the overall lifespan of the spray gun.

[0034] In an embodiment of this invention, the inner diameter of the second pressurizing section 7 is 0.3-0.4 times the inner diameter of the air supply pipe 10. By setting the optimal diameter variation ratio, the air supply pressure can be increased a second time, the gas flow direction can be changed, and a certain stirring effect can be applied to the slurry, which is beneficial for the slurry to be ejected.

[0035] In embodiments of this invention, the nozzle 1, the gun body 2, and the air supply assembly 4 are all on the same horizontal plane. This reduces the resistance of the nozzle, decreases wear on the nozzle from the slurry, and reduces slurry blockage.

[0036] This utility model is made of high-temperature and wear-resistant alloy steel with a relatively thick wall. The diameter ratio has been optimized through multiple tests, and the slurry has little impact on the wear of the spray gun. When working under conditions of 700-760℃, the service life can be as long as about 55 days.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A slurry-fed injection lance for a chalcopyrite boiling roaster, characterized in that, The application relates to a slurry gun, which comprises a gun nozzle (1), a gun body (2), a slurry feeding pipeline (3) and a gas feeding assembly (4), the first end of the gun body (2) is connected with the gun nozzle (1), the second end of the gun body (2) is connected with the gas feeding assembly (4), the gun nozzle (1) is provided with a first pressure increasing part (6) for increasing slurry pressure, the slurry feeding pipeline (3) is arranged on one side of the gun body (2) in an inclined mode, the discharge port of the slurry feeding pipeline (3) is connected with the gun body (2), and the slurry feeding pipeline (3) is used for feeding slurry into the gun body (2), the gas feeding assembly (4) comprises a gas jetting pipe (5), the gas jetting pipe (5) is provided with a second pressure increasing part (7) for increasing gas pressure, the gas outlet of the gas jetting pipe (5) is arranged opposite to the discharge port of the slurry feeding pipeline (3), and the gas jetting pipe (5) is used for mixing gas and slurry and spraying the slurry out of the gun nozzle (1).

2. The slurry-fed injection lance for a chalcopyrite boiling furnace according to claim 1, characterized in that, The first pressure increasing part (6) is a variable-diameter structure arranged in the gun nozzle (1), and is used for making the inner cavity diameter of the first pressure increasing part (6) smaller than the inner cavity diameter of the region far from the first pressure increasing part (6).

3. A slurry-fed injection lance for a chalcopyrite boiling furnace according to claim 2, characterized in that The first pressure increasing part (6) is arranged in the middle of the gun nozzle (1), the region from the connecting end (8) of the gun nozzle (1) used for connecting with the gun body (2) to the first pressure increasing part (6) forms a structure with gradually decreasing inner cavity diameter, and the region from the first pressure increasing part (6) to the jetting end (9) of the gun nozzle (1) forms a structure with gradually increasing inner cavity diameter.

4. A slurry-fed injection lance for a chalcopyrite boiling furnace according to claim 3, characterized in that The minimum diameter of the first pressure increasing part (6) is 0.55-0.65 times the diameter of the gun body (2).

5. The slurry-fed injection lance for a chalcopyrite boiling furnace according to claim 1, characterized in that, The first end of the slurry feeding pipeline (3) is detachably connected on the gun body (2), and the second end of the slurry feeding pipeline (3) is used for connecting with a slurry feeding device.

6. A slurry-fed injection lance for a chalcopyrite boiling furnace according to claim 5, characterized in that The axis extending from the discharge port of the slurry feeding pipeline (3) intersects with the axis extending from the gas outlet of the gas jetting pipe (5), and the included angle is 70-80 degrees.

7. The slurry-fed injection lance for a chalcopyrite boiling furnace according to claim 1, characterized in that, The gas feeding assembly (4) further comprises a gas feeding pipe (10), the first end of the gas feeding pipe (10) is detachably connected with the gas jetting pipe (5), and the second end of the gas feeding pipe (10) is used for being connected with a compressed air device through a pipeline.

8. A slurry-fed injection lance for a chalcopyrite boiling furnace according to claim 7, characterized in that The gas jetting pipe (5) further comprises a variable-diameter part (11), the variable-diameter part (11) forms a variable-diameter structure with gradually decreasing diameter from the connection position with the gas feeding pipe (10) to the second pressure increasing part (7), and the second pressure increasing part (7) extends above the discharge port of the slurry feeding pipeline (3).

9. The slurry-fed injection lance for a chalcopyrite boiling furnace according to claim 7, characterized in that, The inner diameter of the second pressure increasing part (7) is 0.3-0.4 times the inner diameter of the gas feeding pipe (10).

10. A slurry-fed injection lance for a chalcopyrite boiling furnace according to claim 1, characterized in that, The gun nozzle (1), the gun body (2) and the gas feeding assembly (4) are all arranged on the same horizontal plane.

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