Colored copper side-blown converter oxygen lance with adjustable gas proportion

Abstract

The utility model belongs to the technical field of oxygen lances, and particularly relates to a gas-proportion-adjustable colored copper side-blown converter oxygen lance, which is characterized by comprising an in-furnace nozzle, a lance body and a flow adjusting mechanism, an oxygen inlet and a compressed air inlet are respectively arranged on the lance body, and an oxygen flow adjusting cavity is arranged between the oxygen inlet and the compressed air inlet. The in-furnace nozzle is connected with the front side of the gun body, and the flow adjusting mechanism is connected with the rear side of the gun body. The flow adjusting mechanism comprises a sealing box base, a straight stroke electric actuator and an adjusting bolt, the front end of the adjusting bolt is located in the oxygen flow adjusting cavity, and the straight stroke electric actuator and the pressure of the compressed air inlet are in linkage control. Compared with the prior art, the oxygen flow adjusting device has the advantages that the flow of the oxygen inlet pipe is adjusted, the oxygen flow is adaptively adjusted in real time under the pressure fluctuation condition of compressed air, and the adverse effect of fluctuation change of the inlet pressure of the compressed air on the concentration of oxygen-enriched air can be reduced to the maximum extent.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oxygen lance technical field, especially relate to a gas proportion adjustable nonferrous copper side blown converter oxygen lance. BACKGROUND

[0002] Side blown converter is the converter steelmaking method that air or oxygen is blown from the side of converter shaft to oxidize and remove impurity elements in molten iron and provide heat to obtain molten steel. Side blown converter can be divided into straight cylinder type and vortex drum type, and side blown converter mainly relies on air supply eye to supply air, and air (air or oxygen) is supplied from one side of the converter, therefore, the trunnion of one side of the converter is hollow and connected with the air pipe. Air or oxygen enters the hollow trunnion through the air pipe, then enters the air bellow through the support ring, and finally is blown into the molten pool through the air supply eye. The inclination angle of the air supply eye of the side blown converter is 7°-8°, and as the blowing process proceeds, the liquid level of the converter is constantly lowered, so the converter needs to be tilted to maintain the relative position of the air supply eye and the liquid level. The angle that the converter should maintain during each period of smelting is the rocking system of the side blown converter.

[0003] The side blown converter is used for treating copper matte (metal sulfide) in nonferrous metallurgical production during copper-nickel smelting process to obtain crude copper and high-nickel matte, and since the heat generated by the oxidation reaction of iron and sulfur in copper water needs to be supplied to all heat expenditures, it is necessary to additionally supplement oxygen-rich air to enhance the oxidation reaction. Oxygen-rich air can not only increase the combustion temperature in front of the tuyere, but also increase the heat content of unit combustion products due to the increase of the combustion temperature in front of the tuyere, which is beneficial to reducing the fuel ratio.

[0004] The utility model discloses a side blown converter oxygen lance and the side blown converter with same, the side blown converter oxygen lance includes a nozzle and an oxygen lance, the nozzle is equipped with the air duct that passes through the front end and rear end, the rear end of nozzle is connected with oxygen lance, and the oxygen lance includes the front pipe in the front end of oxygen lance, the rear pipe in the rear end of oxygen lance and the flange that sets up in the rear end of front pipe, the front pipe is communicated with rear pipe, and the front pipe extends to the front end of nozzle through the air duct, and the flange is connected with the rear end of nozzle, the rear pipe includes first medium passage, second medium passage and tail channel, and the tail channel is equipped with the obturator. The existing side blown converter oxygen lance, oxygen and air each enter by a branch pipe, and the flow of oxygen and air cannot be adjusted, the concentration of oxygen-rich air also changes due to the fluctuation of air inlet pressure, so that the combustion effect is unstable, and further optimization is very needed. UTILITY MODEL CONTENTS

[0005] The purpose of this invention is to provide an oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio, overcoming the shortcomings of the prior art, realizing the flow rate regulation of the oxygen inlet pipe, and adaptively adjusting the oxygen flow rate in real time under the pressure fluctuation of compressed air, so as to minimize the adverse effects of the fluctuation of compressed air inlet pressure on the concentration of oxygen-enriched air, and make the combustion effect in the furnace more stable.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] An oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio includes an in-furnace nozzle, a lance body, and a flow regulation mechanism. The lance body has an oxygen inlet and a compressed air inlet, respectively. An oxygen flow regulation chamber is provided between the oxygen inlet and the compressed air inlet inside the lance body. The in-furnace nozzle is connected to the front side of the lance body, and the flow regulation mechanism is connected to the rear side of the lance body. The flow regulation mechanism includes a sealing housing, a linear electric actuator, and an adjusting bolt. The sealing housing is connected to the rear side of the lance body, and the adjusting bolt passes through the sealing housing. The front end of the adjusting bolt is located inside the oxygen flow regulation chamber, and the rear end of the adjusting bolt is connected to the output shaft of the linear electric actuator. The linear electric actuator performs linkage control based on the compressed air inlet pressure.

[0008] Furthermore, the diameter ratio of the oxygen inlet to the compressed air inlet is 1:1.

[0009] Furthermore, the linear electric actuator is a Hantok HITORK-HKM series linear electric actuator with a maximum stroke of 115mm.

[0010] Furthermore, the sealing housing is provided with a neoprene rubber ring or a fluororubber sealing ring.

[0011] Furthermore, the front end of the regulating plug is a conical head, and there is a gradually changing gap between the conical head and the conical seat of the oxygen flow regulating cavity.

[0012] Furthermore, the front end of the nozzle inside the furnace is provided with a narrowing band, and the outer side of the narrowing band is a flared mouth.

[0013] Furthermore, the ratio of the diameter d of the reduced diameter band to the inner diameter D of the nozzle in the furnace on the front side of the reduced diameter band is 1:1.2-1.5.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1) To achieve flow regulation of oxygen inlet pipe, and to adaptively adjust oxygen flow in real time under the condition of compressed air pressure fluctuation, so as to minimize the adverse effects of compressed air inlet pressure fluctuation on the concentration of oxygen-enriched air.

[0016] 2) The linear electric actuator has high adjustment accuracy and stable flow regulation effect. By linking the linear electric actuator with the compressed air inlet pressure, the oxygen concentration in the oxygen-enriched air can be guaranteed to be 28-40%, making the combustion effect in the furnace more stable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 yes Figure 1 External three-dimensional view;

[0019] In the diagram: 1-furnace nozzle, 2-gun body, 3-flow regulation mechanism, 4-oxygen inlet, 5-compressed air inlet, 6-oxygen flow regulation chamber, 7-sealing box seat, 8-linear electric actuator, 9-adjusting bolt, 10-gap, 11-reduction band, 12-bell mouth. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0022] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention.

[0023] See Figures 1-2This is a schematic diagram of an embodiment of an oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio. It includes an in-furnace nozzle 1, a lance body 2, and a flow regulation mechanism 3. The lance body 2 has an oxygen inlet 4 and a compressed air inlet 5. An oxygen flow regulation chamber 6 is provided between the oxygen inlet 4 and the compressed air inlet 5 inside the lance body 2. The in-furnace nozzle 1 is connected to the front side of the lance body 2, and the flow regulation mechanism 3 is connected to the rear side of the lance body 2. The flow regulation mechanism 3 includes a sealing housing 7, a linear electric actuator 8, and an adjusting bolt 9. The sealing housing 7 is connected to the rear side of the lance body 2, and the adjusting bolt 9 passes through the sealing housing 7. The front end of the regulating plug 9 is located inside the oxygen flow regulating chamber 6. The rear end of the regulating plug 9 is connected to the output shaft of the linear electric actuator 8. The linear electric actuator 8 performs linkage control according to the pressure of the compressed air inlet 5. When the pressure of the compressed air inlet 5 is high, the linear electric actuator 8 pulls the regulating plug 9 to the left to increase the oxygen flow. Conversely, when the pressure of the compressed air inlet 5 is low, the linear electric actuator 8 pulls the regulating plug 9 to the right to reduce the oxygen inflow, so that the oxygen concentration in the oxygen-enriched air ejected from the bell mouth is stabilized in the range of 28-40%, and the combustion effect in the furnace is more stable.

[0024] In this embodiment, the diameter ratio of oxygen inlet 4 to compressed air inlet 5 is 1:1 for easy adjustment. The linear electric actuator 8 is a Hantok HITORK-HKM series linear electric actuator with a maximum stroke of 115mm. The front end of the adjusting plug 9 is a conical head, and there is a gradually changing gap 10 between the conical head and the conical seat of the oxygen flow regulating chamber 6. The sealing housing 7 is equipped with a neoprene or fluororubber sealing ring, ensuring reliable sealing in an oxygen environment.

[0025] The front end of the furnace nozzle 1 is provided with a narrowing band 11, and the outer side of the narrowing band is a bell mouth 12. The ratio of the diameter d of the narrowing band to the inner diameter D of the front side of the furnace nozzle 1 is 1:1.2-1.5, with a preferred value of 1:1.3. The combined structure of the narrowing band 11 and the bell mouth 12 can accelerate the flow rate of oxygen-enriched air and achieve a larger combustion effect.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio, characterized in that, The device includes an in-furnace nozzle, a gun body, and a flow regulation mechanism. The gun body is equipped with an oxygen inlet and a compressed air inlet. An oxygen flow regulation chamber is provided between the oxygen inlet and the compressed air inlet inside the gun body. The in-furnace nozzle is connected to the front side of the gun body, and the flow regulation mechanism is connected to the rear side of the gun body. The flow regulation mechanism includes a sealing housing, a linear electric actuator, and an adjusting bolt. The sealing housing is connected to the rear side of the gun body, and the adjusting bolt is installed through the sealing housing. The front end of the adjusting bolt is located inside the oxygen flow regulation chamber, and the rear end of the adjusting bolt is connected to the output shaft of the linear electric actuator. The linear electric actuator performs linkage control according to the compressed air inlet pressure.

2. The oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio according to claim 1, characterized in that, The diameter ratio of the oxygen inlet to the compressed air inlet is 1:

1.

3. The oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio according to claim 1, characterized in that, The linear electric actuator is a Hantok HITORK-HKM series linear electric actuator with a maximum stroke of 115mm.

4. The oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio according to claim 1, characterized in that, The sealing box is equipped with a neoprene rubber ring or a fluororubber sealing ring.

5. The oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio according to claim 1, characterized in that, The front end of the regulating plug is a cone, and there is a gradually changing gap between the cone and the conical seat of the oxygen flow regulating cavity.

6. The oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio according to claim 1, characterized in that, The front end of the nozzle inside the furnace is provided with a narrowing band, and the outer side of the narrowing band is a flared mouth.

7. The oxygen lance for a non-ferrous copper side-blown furnace with adjustable gas ratio according to claim 6, characterized in that, The ratio of the diameter d of the reduced diameter band to the inner diameter D of the nozzle in the furnace on the front side of the reduced diameter band is 1:1.2-1.5.

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