Oxygen lance for blast furnace

Abstract

The utility model relates to the technical field of smelting equipment, in particular to an oxygen lance for a blast furnace, which comprises an oxygen main pipe, an air main pipe, an air branch pipe and an oxygen branch pipe, the oxygen main pipe is nested in the sealed air main pipe in parallel, gaps are reserved between the oxygen main pipe and the air main pipe, and the gaps are fixedly connected through a support. The oxygen main pipe and the air main pipe are communicated through a ventilation opening in the front end of the oxygen main pipe, the oxygen branch pipe penetrates through the air main pipe to be communicated with the oxygen main pipe, the air branch pipe is communicated with the air main pipe, and a thermocouple sensor is arranged on the outer wall of the middle of the oxygen main pipe. A camera is arranged in the peeping device, and a wire outlet is connected to the side wall of the rear end of the oxygen main pipe. The peeping device can be used for observing the combustion condition. The thermocouple sensor is used for measuring the temperature of the oxygen lance so as to judge the depth of the oxygen lance entering the blast furnace, avoid burning loss of the oxygen lance and eliminate potential safety hazards.

Description

TECHNICAL FIELD

[0001] The utility model relates to smelting equipment technical field, especially a kind of oxygen lance for blast furnace. BACKGROUND

[0002] After blast furnace stops production, the temperature of slag iron in hearth drops significantly in the initial stage of blowing, which may cause the iron notch to be unable to open, the slag iron in front of tuyere to be bonded, and the slag iron to exist in the hearth. Therefore, in order to melt and discharge the slag iron in the hearth as soon as possible, it is crucial to heat the hearth as soon as possible. Currently, the method of blowing iron notch or directly inserting oxygen pipe into iron notch to heat the hearth is usually used, which requires the use of blast furnace oxygen lance.

[0003] The existing patent CN220951861U is a blast furnace oxygen lance with good cooling effect, which is provided with a connecting pipe on one side of the main oxygen blowing pipe, a peeping tube on one side of the connecting pipe, a lens on one side of the peeping tube, a peeping mirror fixed inside the lens, an oxygen inlet pipe and an air inlet pipe fixed on both sides of the bottom of the main oxygen blowing pipe, a cooling sleeve on one side of the main oxygen blowing pipe, and a condensate inlet pipe fixed on the bottom of the cooling sleeve. The device is inconvenient to observe due to the length and weight of the oxygen lance. Moreover, the depth of the oxygen lance into the furnace cannot be determined. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a blast furnace oxygen lance for melting slag iron in blast furnace blowing.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A blast furnace oxygen lance comprises an oxygen main pipe, an air main pipe, an air branch pipe and an oxygen branch pipe. The oxygen main pipe is parallelly nested in the sealed air main pipe, and a gap is left between the oxygen main pipe and the air main pipe. The gap is fixedly connected by a support. The oxygen main pipe and the air main pipe are communicated through a ventilation opening at the front end of the oxygen main pipe. The oxygen branch pipe is communicated with the oxygen main pipe through the air main pipe. The air branch pipe is communicated with the air main pipe. A thermocouple sensor is arranged on the outer wall of the middle part of the oxygen main pipe. One end of the oxygen main pipe is connected with a gas nozzle. The other end of the oxygen main pipe is connected with a peeping device. The peeping device is provided with a camera. An outlet is connected to the side wall of the rear end of the oxygen main pipe.

[0007] The ventilation opening is provided with a plurality of ventilation openings on the outer periphery of the oxygen main pipe.

[0008] The oxygen branch pipe is inclinedly arranged towards the front end of the oxygen main pipe, and the inclination angle is 70-85°.

[0009] The air branch pipe is inclinedly arranged towards the front end of the air main pipe, and the inclination angle is 70-85°.

[0010] The air branch pipe and the oxygen branch pipe are provided with ball valves and pressure gauges.

[0011] The air nozzle is conical, and the air nozzle is sleeved on the outer diameter of the oxygen main pipe.

[0012] The viewing device comprises a shell, a lens is embedded at the front end of the shell, a camera is arranged in the shell and abuts against the lens, and a connecting rib plate is arranged between the shell and the outer wall of the oxygen main pipe.

[0013] The wires of the thermocouple sensor and the camera are led out from the wire outlet.

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

[0015] 1. The viewing device can observe the combustion condition, conveniently adjust the flow of oxygen and air, ensure the continuous heat, effectively improve the temperature of the blast furnace, improve the combustion efficiency of the blast furnace, improve the flowability of the slag iron, prevent the slag iron from being bonded, and are beneficial to accelerating the discharge of the slag iron.

[0016] 2. The air main pipe is sleeved outside the oxygen main pipe, and the inhaled air has a cooling effect on the oxygen lance.

[0017] 3. The thermocouple sensor is used for measuring the temperature of the oxygen lance, so as to judge the depth of the oxygen lance into the blast furnace and avoid the burning loss of the oxygen lance. The personal safety of the operators is ensured, and the safety hazard is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the utility model.

[0019] Figure 2 It is a structural view of the air nozzle.

[0020] Figure 3 It is a structural view of the viewing device. DETAILED DESCRIPTION

[0021] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] In the description of the utility model, it should be understood that the terms "first", "second" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0023] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium, can be two element internal communication, for ordinary skilled in the art, the above-mentioned term can be understood by concrete case concrete meaning in the utility model.

[0024] As Figure 1 The utility model discloses a blast furnace oxygen lance, including oxygen main pipe 1, air main pipe 2, air branch pipe 7 and oxygen branch pipe 8, oxygen main pipe 1 is parallelly nested in sealed air main pipe 2, and the air main pipe 2 is communicated through the air vent 12 of oxygen main pipe 1 front end between oxygen main pipe 1 and air main pipe 2, and the clearance is left in the middle of oxygen main pipe 1 and air main pipe 2, and is fixedly connected through support 11 between the clearance, and oxygen branch pipe 8 passes through air main pipe 2 and is communicated with oxygen main pipe 1, and air branch pipe 7 is communicated with air main pipe 2, and the outer wall of the middle part of oxygen main pipe 1 is provided with thermocouple sensor 4, and one end of oxygen main pipe 1 is connected with gas nozzle 3, and the other end of oxygen main pipe 1 is connected with peep device 5, and the camera 53 is arranged in peep device 5 and is used to observe the combustion condition, and peep device 5 is arranged at the end of oxygen main pipe 1, prevents from damaging due to temperature being too high. The side wall of the rear end of oxygen main pipe 1 is connected with outlet 6.

[0025] The gas nozzle 3 is conical, and the gas nozzle 3 is sleeved on the outer diameter of the oxygen main pipe 1. The conical gas nozzle 3 is convenient for oxygen to quickly reach the combustion area and improves the combustion efficiency. In addition, the conical gas nozzle 3 is beneficial to reducing the friction between the oxygen lance and the combustion material when the oxygen lance is inserted into the blast furnace hearth, thereby reducing the working intensity.

[0026] The air vent 12 is provided with a plurality of air vents on the outer periphery of the oxygen main pipe 1.

[0027] The oxygen branch pipe 8 is inclined to the front end of the oxygen main pipe 1, and the inclination angle is 70-85°. The gas is smoothly blown to the front end of the oxygen lance.

[0028] The air branch pipe 7 is inclined to the front end of the air main pipe 2, and the inclination angle is 70-85°. The gas is smoothly blown to the front end of the oxygen lance.

[0029] The air branch pipe 7 and the oxygen branch pipe 8 are provided with ball valves 9 and pressure gauges 10.

[0030] The peep device 5 includes a housing 51, a lens 52 is embedded in the front end of the housing 51, a camera 53 is arranged in the housing 51 and abuts against the lens 52, and a rib plate 54 is connected between the housing 51 and the outer wall of the oxygen main pipe 1.

[0031] The lead wires of the thermocouple sensor 4 and the camera 53 are led out from the outlet 6.

[0032] The preferred embodiments of the present application are described in detail above with reference to the drawings, and various specific technical features described in the foregoing specific embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, various possible combinations are not described again in the present application. In addition, various different embodiments of the present application can also be combined in any manner, as long as they do not deviate from the spirit of the present application, and they should also be considered as disclosed in the present application.

[0033] In order to make the purpose, technical scheme and technical effect of the present application more clear, the technical scheme in the embodiment of the present application is described clearly and completely. However, the following described embodiments are only a part of the embodiments of the present application, not all the embodiments. Combined with the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0034] Embodiment 1:

[0035] A kind of oxygen lance for blast furnace, including oxygen main pipe 1, air main pipe 2, air branch pipe 7 and oxygen branch pipe 8, oxygen main pipe 1 is nested in sealed air main pipe 2 in parallel, oxygen main pipe 1 and air main pipe 2 are communicated by the air vent 12 of oxygen main pipe 1 front end, there are 4 air vents 12 on the outer wall of oxygen main pipe 1, there is gap between oxygen main pipe 1 and air main pipe 2, fixed connection is passed through support 11 between gap, oxygen branch pipe 8 passes through air main pipe 2 and is communicated with oxygen main pipe 1, 75 ° angle is arranged between oxygen branch pipe 8 and oxygen main pipe 1, oxygen branch pipe 8 is inclined to the front end of oxygen main pipe 1.

[0036] Air branch pipe 7 is communicated with air main pipe 2, 80 ° angle is arranged between air branch pipe 7 and air main pipe 2. Air branch pipe 7 is inclined to the front end of air main pipe 2. Ball valve 9 and pressure gauge 10 are arranged on air branch pipe 7 and oxygen branch pipe 8.

[0037] Thermocouple sensor 4 is arranged on the outer wall of the middle part of oxygen main pipe 1, one end of oxygen main pipe 1 is connected with gas nozzle 3, gas nozzle 3 is conical, and gas nozzle 3 is threadedly sleeved on the outer diameter of oxygen main pipe 1.

[0038] The other end of oxygen main pipe 1 is connected with peeping device 5, peeping device 5 includes shell 51, mirror 52 is embedded in the front end of shell 51, mirror 52 is opposite to the inner cavity of oxygen main pipe 1, camera 53 is arranged in shell 51 and abuts against mirror 52, and web plate 54 is connected between shell 51 and the outer wall of oxygen main pipe 1.

[0039] The side wall of the rear end of the oxygen main pipe 1 is connected with an outlet 6.

[0040] Embodiment 2

[0041] The oxygen lance for blast furnace comprises an oxygen main pipe 1, an air main pipe 2, an air branch pipe 7 and an oxygen branch pipe 8, the oxygen main pipe 1 is embedded in the air main pipe 2 in parallel, the oxygen main pipe 1 and the air main pipe 2 are communicated through the air vent 12 at the front end of the oxygen main pipe 1, three air vents 12 are arranged on the outer periphery of the oxygen main pipe 1, a gap is left between the oxygen main pipe 1 and the air main pipe 2, the gap is fixedly connected through the support 11, the oxygen branch pipe 8 is communicated with the oxygen main pipe 1 through the air main pipe 2, an angle of 85 degrees is arranged between the oxygen branch pipe 8 and the oxygen main pipe 1, and the oxygen branch pipe 8 is inclined to the front end of the oxygen main pipe 1.

[0042] The air branch pipe 7 is communicated with the air main pipe 2, an angle of 75 degrees is arranged between the air branch pipe 7 and the air main pipe 2, and the air branch pipe 7 is inclined to the front end of the air main pipe 2.

[0043] The outer wall of the middle part of the oxygen main pipe 1 is provided with a thermocouple sensor 4, one end of the oxygen main pipe 1 is connected with a gas nozzle 3, the gas nozzle 3 is conical, and the gas nozzle 3 is threadedly sleeved on the outer diameter of the oxygen main pipe 1.

[0044] The other end of the oxygen main pipe 1 is connected with a peeping device 5, the peeping device 5 comprises a shell 51, a lens 52 is embedded at the front end of the shell 51, the lens 52 is opposite to the inner cavity of the oxygen main pipe 1, a camera 53 is arranged in the shell 51 and abuts against the lens 52, and a web plate 54 is arranged between the shell 51 and the outer wall of the oxygen main pipe 1.

[0045] The side wall of the rear end of the oxygen main pipe 1 is connected with an outlet 6.

[0046] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and essential characteristics of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An oxygen lance for a blast furnace, characterized in that, It includes an oxygen main pipe, an air main pipe, an air branch pipe, and an oxygen branch pipe. The oxygen main pipe is nested parallel to the sealed air main pipe, with a gap between them. The oxygen main pipe and the air main pipe are fixedly connected by a bracket in the gap. The oxygen main pipe and the air main pipe are connected through a vent at the front end of the oxygen main pipe. The oxygen branch pipe passes through the air main pipe and is connected to the oxygen main pipe. The air branch pipe is connected to the air main pipe. A thermocouple sensor is installed on the outer wall of the middle part of the oxygen main pipe. One end of the oxygen main pipe is connected to a gas nozzle, and the other end is connected to a viewing device with a camera inside. An outlet is connected to the side wall at the rear end of the oxygen main pipe.

2. The oxygen lance for a blast furnace according to claim 1, characterized in that, The ventilation openings are provided on the outer periphery of the oxygen main pipe.

3. The oxygen lance for a blast furnace according to claim 1, characterized in that, The oxygen branch pipe is inclined towards the front end of the oxygen main pipe at an angle of 70-85°.

4. The oxygen lance for a blast furnace according to claim 1, characterized in that, The air branch pipe is inclined towards the front end of the main air pipe at an angle of 70-85°.

5. The oxygen lance for a blast furnace according to claim 1, characterized in that, Both the air branch pipe and the oxygen branch pipe are equipped with ball valves and pressure gauges.

6. The oxygen lance for a blast furnace according to claim 1, characterized in that, The air nozzle is conical and is fitted onto the outer diameter of the oxygen main pipe.

7. The oxygen lance for a blast furnace according to claim 1, characterized in that, The viewing device includes a housing, a lens embedded in the front end of the housing, a camera inside the housing that is attached to the lens, and a connecting rib between the housing and the outer wall of the oxygen pipe.

8. The oxygen lance for a blast furnace according to claim 1, characterized in that, The wires of the thermocouple sensor and the camera are led out from the outlet.

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