CN210314335U

CN210314335U - Oxygen gun for fast opening blast furnace

Info

Publication number: CN210314335U
Application number: CN201921311228.7U
Authority: CN
Inventors: 曾凡波; 刘喜华; 殳哲君
Original assignee: Zenith Steel Group Co Ltd
Current assignee: Zenith Steel Group Co Ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-04-14
Anticipated expiration: 2029-08-13

Abstract

The utility model relates to an oxygen lance for fast blast furnace opening, which belongs to the technical field of blast furnace ironmaking equipment and comprises an oxygen lance main body, wherein the oxygen lance main body comprises an inner pipe and an outer pipe, the inner pipe is coaxially arranged in the outer pipe, a gas channel is formed in the inner pipe, a heat insulation cavity is formed between the inner pipe and the outer pipe, a first thermocouple and a second thermocouple are fixedly arranged in the heat insulation cavity at intervals, high temperature resistant slurry is filled in the heat insulation cavity, a drill bit with a central through hole is coaxially and fixedly arranged on the oxygen lance main body close to the front end of the first thermocouple, the central through hole of the drill bit is communicated with the gas channel, an endoscopic camera is fixedly arranged in the gas channel, and irradiates the front end of; the utility model adopts the drill with the central through hole to solve the problems of difficult process and easy blockage of the oxygen lance embedding iron notch; an endoscopic camera is arranged in the oxygen lance to solve the problem that whether the oxygen lance ignites in the blow-in process; the pressure measuring device is arranged on the oxygen lance to solve the problem of detecting the pressure state in the furnace during the use of the oxygen lance.

Description

Oxygen gun for fast opening blast furnace

Technical Field

The utility model relates to a blast furnace ironmaking equipment technical field especially relates to blast furnace heating is with sending oxygen device, the utility model provides an accelerate the oxygen lance for the blast furnace quick open furnace of blow-in process, shorten to reach the time.

Background

The traditional blast furnace opening and long-term smoldering blast furnace opening processes are both iron notch open type, after the blast furnace is ignited and supplies air, hot air is burnt in the area of the air notch to generate high-temperature coal gas, part of the high-temperature coal gas is blown out of a hearth from the iron notch, so that the hearth is heated, and the defects of the process operation flow are as follows: the coal gas blown out of the taphole causes the coal gas of the whole casting house to seriously exceed the standard, thus threatening the safe production; high-temperature coke, iron slag and smoke dust sprayed from an iron notch are not beneficial to safety production, and meanwhile, serious environmental temperature problem is caused; the heat carried by the hot air descending through the tuyere is not enough to quickly heat the hearth, and particularly, when the blast furnace is opened after being stewed for a long time, the channel between the tuyere and the iron notch is small, and the cold slag iron is slowly melted, so that the recovery process of the blast furnace is slow.

In order to solve the problems, a few of the conventional manufacturers use a simple blast furnace iron notch oxygen lance, the oxygen lance body is of a single-tube straight-through type, the rear section of the oxygen lance is provided with a flange, the side surface of the oxygen lance is provided with an oxygen and air quick connector which is respectively connected with an oxygen pipeline and an air pipeline, and the rear part of the oxygen lance is provided with a peephole for manually observing the working condition of the oxygen lance. However, the oxygen lance is difficult to track and observe the position of molten iron in the furnace and the burning loss condition of the molten iron to the oxygen lance, so that the cooling wall of the iron notch is easy to burn during blowing burning, and serious accidents are caused.

In order to solve the problems, a Chinese patent with the patent number of 200920045539.3 discloses an iron notch oxygen blowing lance, the lance body of which is divided into a front section lance body embedded into the iron notch and a rear section lance body exposed out of the iron notch and provided with an oxygen interface; the front-section gun body is made of a section of the lining pipe which is externally coated with refractory materials, and at least one thermocouple is embedded in the refractory materials at intervals; the other section of the lining pipe forms a rear section gun body, and the thermocouple is externally connected with a temperature display through a lead; when the fore-end lance body is embedded into the taphole, the thermocouple at the rearmost end is positioned near the inner side of the taphole furnace wall. The iron notch oxygen blowing lance can realize accurate on-line tracking observation, thereby preventing molten iron from burning out the iron notch cooling wall and avoiding causing serious and serious accidents.

Although the above patent can realize accurate on-line tracking observation, the oxygen lance has the following problems: 1. the process of burying the oxygen lance into an iron notch is difficult, and the end part of the oxygen lance is easy to block; 2. when the oxygen lance is used in the blow-in process, whether the oxygen lance is ignited in the furnace is not easy to detect, and the pressure state in the furnace is not easy to detect and know; 3. the front-section lance body of the oxygen lance is made of a section of lining pipe which is externally coated with refractory material, and the oxygen lance burns quickly in the using process. 4. The oxygen lance is difficult to install on the tapping machine.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the problems that whether the oxygen lance used in the prior art is ignited in the furnace is not easy to be perceived, the oxygen lance is difficult to bury in an iron notch, the end part of the oxygen lance is easy to block, and the oxygen lance is burnt and damaged too fast in the blow-on process, the oxygen lance for the blast furnace is provided.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an oxygen rifle for blast furnace fast blast furnace, includes oxygen rifle main part, oxygen rifle main part includes inner tube and outer tube, the inner tube is coaxial to be set up in the outer tube, form gas passage in the inner tube, form thermal-insulated cavity between inner tube and the outer tube, interval fixed mounting has first thermocouple and second thermocouple in the thermal-insulated cavity, it has high temperature resistant thick liquids to fill in the thermal-insulated cavity, the coaxial fixed mounting of front end that is close to first thermocouple in the oxygen rifle main part has the drill bit that has central through-hole, the central through-hole and the gas passage intercommunication of drill bit, fixed mounting has the camera of peeping in the gas passage, peep the camera and shine the front end of gas passage.

The utility model discloses an oxygen lance for the rapid blast furnace opening, the oxygen lance main body comprises an inner pipe and an outer pipe, a heat insulation cavity is formed between the inner pipe and the outer pipe, a first thermocouple and a second thermocouple are fixedly installed in the heat insulation cavity at intervals, and the first thermocouple is positioned at the front end of the oxygen lance body and is used for detecting the generation speed of iron slag and the burning loss speed of the oxygen lance in the process of opening the blast furnace; the second thermocouple is positioned at the rear end of the oxygen lance body, so that the second thermocouple is ensured to be close to the position of the refractory material of the furnace hearth, when the oxygen lance burns the refractory material, the temperature of the thermocouple rises sharply, and at the moment, oxygen introduction is stopped immediately, so that the refractory material of the furnace hearth is prevented from being burnt by oxygen; high-temperature-resistant slurry is filled in the heat insulation cavity and forms a refractory material after being baked, so that the problem that the oxygen lance is burnt too fast in the using process can be solved; a drill bit with a central through hole is coaxially and fixedly arranged on the oxygen lance main body close to the front end of the first thermocouple, the central through hole of the drill bit is communicated with the gas channel, and the drill bit can smoothly drill the oxygen lance body into a preset position, so that the obstruction of residual iron slag and broken coke in the process that the oxygen lance body enters the iron notch channel is reduced; meanwhile, the central through hole on the drill bit is communicated with the gas channel, so that high-pressure air can be ensured to be sprayed into the furnace hearth from the through hole of the drill bit; an endoscopic camera is fixedly installed in the gas channel and irradiates the front end of the gas channel, and the endoscopic camera can monitor whether the ignition of the oxygen lance in the furnace is successful or not and can realize the real-time monitoring of the oxygen burning process in the furnace.

The traditional oxygen lance is difficult to install on a tapping machine, and in order to solve the problem, an oxygen lance shank is coaxially and detachably installed at the rear end of an oxygen lance main body, the oxygen lance shank seals the rear end of a gas channel, and the oxygen lance shank is used for installing the oxygen lance on the tapping machine for use, so that the oxygen lance can be conveniently buried in a furnace cylinder and pulled out of the oxygen lance.

When the oxygen lance is used for blowing in, the pressure state in the lance is not easy to detect and know, and in order to solve the problem, a pressure measuring device for detecting the pressure in the lance is fixedly arranged on the outer tube and is communicated with the gas channel.

Further, the pressure measuring device comprises a pressure guiding pipe, the pressure guiding pipe is fixedly arranged on the outer pipe, one end of the pressure guiding pipe is communicated with the gas channel, the other end of the pressure guiding pipe is fixedly provided with a pressure gauge, a measuring head of the pressure gauge is positioned in the pressure guiding pipe, and the pressure guiding pipe is communicated with a ball valve; the ball valve is used for controlling the switch, and the pressure gauge can monitor the pressure in the oxygen lance and the generation condition of iron slag in the furnace on line.

Furthermore, the outer pipe is fixedly provided with a high-pressure oxygen inlet and a compressed air inlet which are communicated with the gas channel, the high-pressure oxygen inlet is positioned at the front end of the compressed air inlet, so that oxygen and air can be mixed conveniently, and meanwhile, the compressed air purging pipeline is convenient to purge in the oxygen starting and stopping process, and the potential safety hazard problem of the oxygen lance in the using process is solved.

The utility model has the advantages that the oxygen lance for the rapid blast furnace opening of the utility model comprises an inner tube and an outer tube, a heat insulation cavity is formed between the inner tube and the outer tube, a first thermocouple and a second thermocouple are fixedly arranged in the heat insulation cavity at intervals, and the first thermocouple is positioned at the front end of the oxygen lance body and is used for detecting the generation speed of iron slag and the burning loss speed of the oxygen lance in the process of opening the oxygen lance; the second thermocouple is positioned at the rear end of the oxygen lance body, so that the second thermocouple is ensured to be close to the position of the refractory material of the furnace hearth, when the oxygen lance burns the refractory material, the temperature of the thermocouple rises sharply, and at the moment, oxygen introduction is stopped immediately, so that the refractory material of the furnace hearth is prevented from being burnt by oxygen; high-temperature-resistant slurry is filled in the heat insulation cavity and forms a refractory material after being baked, so that the problem that the oxygen lance is burnt too fast in the using process can be solved; a drill bit with a central through hole is coaxially and fixedly arranged on the oxygen lance main body close to the front end of the first thermocouple, the central through hole of the drill bit is communicated with the gas channel, and the drill bit can smoothly drill the oxygen lance body into a preset position, so that the obstruction of residual iron slag and broken coke in the process that the oxygen lance body enters the iron notch channel is reduced; meanwhile, the central through hole on the drill bit is communicated with the gas channel, so that high-pressure air can be ensured to be sprayed into the furnace hearth from the through hole of the drill bit; an endoscopic camera is fixedly installed in the gas channel and irradiates the front end of the gas channel, and the endoscopic camera can monitor whether the ignition of the oxygen lance in the furnace is successful or not and can realize the real-time monitoring of the oxygen burning process in the furnace.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a two-dimensional schematic diagram of the present invention.

In the figure: 1. the oxygen lance comprises an oxygen lance main body, 1-1 parts of an inner pipe, 1-2 parts of an outer pipe, 1-3 parts of a gas channel, 1-4 parts of a heat insulation chamber, 2 parts of a first thermocouple, 3 parts of a second thermocouple, 4 parts of high temperature resistant slurry, 5 parts of a drill bit, 6 parts of an endoscopic camera, 7 parts of an oxygen lance shank, 8 parts of a pressure measuring device, 8-1 parts of a pressure leading pipe, 8-2 parts of a pressure gauge, 8-3 parts of a ball valve, 9 parts of a high-pressure oxygen inlet and 10 parts of a compressed air inlet.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in figure 1, the oxygen lance for the rapid blast furnace opening comprises an oxygen lance main body 1, wherein the oxygen lance main body 1 comprises an inner pipe 1-1 and an outer pipe 1-2, the inner pipe 1-1 and the outer pipe 1-2 are both stainless steel pipes, the inner pipe 1-1 is coaxially arranged in the outer pipe 1-2, a gas channel 1-3 is formed in the inner pipe 1-1, a heat insulation chamber 1-4 is formed between the inner pipe 1-1 and the outer pipe 1-2, first thermocouple 2 and second thermocouple 3 are fixedly installed in the thermal-insulated cavity 1-4 at interval, and first thermocouple 2 is located oxygen rifle body front end, and the position department is good apart from drill bit 50.5m, and second thermocouple 3 is located oxygen rifle body rear end, guarantees that second thermocouple 3 is being close to the refractory position department of furnace hearth, and first thermocouple 2 and second thermocouple 3 all adopt the model to be: an armored thermocouple of WRNK-33K type/L/1 ═ 3634/3500/phi 6/M16 x 1.5 is laid through a special compensation lead, is connected into a Schneider PLC 140ACI04000 analog quantity module, acquires signals, is calculated in a program through a formula, displays a temperature value on an Intouch picture and records the historical trend of the temperature value, and high-temperature-resistant slurry 4 is filled in the heat insulation chamber 1-4, and particularly large-ditch casting material can be used for screening powder; a drill bit 5 with a central through hole is coaxially and fixedly arranged on the oxygen lance main body 1 close to the front end of the first thermocouple 2, the central through hole of the drill bit 5 is communicated with the gas channel 1-3, and the drill bit 5 can be an alloy drill bit 5 with the model of HJKKZNB 38/phi 50; an endoscopic camera 6 is fixedly installed in the gas channel 1-3 through a hard steel wire, one end of the hard steel wire is fixedly connected with the endoscopic camera 6, the other end of the hard steel wire penetrates through the inner tube 1-1 and the heat insulation cavity 1-4 and then is welded and fixed with the outer tube 1-2, the endoscopic camera 6 irradiates the front end of the gas channel 1-3, the preferred type of the endoscopic camera 6 is WF010/020, a DC5V rechargeable built-in power supply is adopted, DEPSTECH App software is downloaded by a mobile phone, real-time pictures observed by the endoscopic camera 6 are remotely projected onto a mobile phone screen through wifi connection, and the remote projection effective distance is 5 m. Meanwhile, the DEPSTECH software has the functions of photographing and video recording.

The rear end of the oxygen lance main body 1 is coaxially and detachably provided with an oxygen lance shank 7, the detachable connection can be realized by threaded connection, but is not limited to threaded connection, the rear end of the oxygen lance main body 1 is coaxially and fixedly provided with a mounting block, the mounting block is provided with a threaded hole communicated with a gas channel 1-3, the oxygen lance shank 7 is installed in the threaded hole in a threaded manner, the oxygen lance shank 7 seals the rear end of the gas channel 1-3, and the oxygen lance shank 7 is used for installing the oxygen lance on a tapping machine for use, so that the oxygen lance can be conveniently buried into a furnace cylinder and pulled out of the oxygen lance.

The pressure measuring device 8 for detecting the pressure in the furnace is fixedly installed on the outer pipe 1-2, the pressure measuring device 8 is communicated with the gas channel 1-3, the pressure measuring device 8 comprises a pressure leading pipe 8-1, the pressure leading pipe 8-1 is fixedly installed on the outer pipe 1-2, one end of the pressure leading pipe 8-1 is communicated with the gas channel 1-3, the other end of the pressure leading pipe 8-1 is fixedly installed with a pressure gauge 8-2, a measuring head of the pressure gauge 8-2 is located in the pressure leading pipe 8-1, and the pressure leading pipe 8-1 is communicated with a ball valve 8-3; the switch is controlled by using the ball valve 8-3, and the pressure gauge 8-2 can monitor the pressure in the oxygen lance and the generation condition of iron slag in the furnace on line.

The high-pressure oxygen inlet 9 and the compressed air inlet 10 which are communicated with the gas channel 1-3 are fixedly arranged on the outer pipe 1-2, the high-pressure oxygen inlet 9 is positioned at the front end of the compressed air inlet 10 and behind the second thermocouple 3, so that oxygen and air can be conveniently mixed, meanwhile, compressed air is convenient to purge a pipeline in the oxygen starting and stopping processes, and the potential safety hazard problem of the oxygen lance in the using process is solved.

The utility model discloses an oxygen lance for fast blast furnace opening, when in use, the oxygen lance shank 7 is fixedly arranged on a tapping machine, the tapping machine is used to drill the oxygen lance into the furnace by means of a drill bit 5, and a high-pressure oxygen inlet 9 and a compressed air inlet 10 are connected with corresponding pipelines, and then a first thermocouple 2 and a second thermocouple 3 circuit are connected; in the process of blowing in, industrial oxygen enters the gas channel 1-3 through the high-pressure oxygen inlet 9 and then enters the furnace hearth through the central hole of the drill 5, and the oxygen is utilized to accelerate the combustion of coke and residual iron in the furnace hearth to release a large amount of heat, so that the iron slag in the furnace hearth is rapidly heated, and the internal heat state of the furnace hearth is improved. The first thermocouple 2 is positioned at the front end of the oxygen lance body, the second thermocouple 3 is positioned at the rear end of the oxygen lance body, the second thermocouple 3 is ensured to be positioned at a position close to the refractory material of the furnace hearth, when the refractory material is burnt by the oxygen lance, the temperature of the thermocouple is sharply increased, and at the moment, oxygen introduction is stopped immediately, so that the refractory material of the furnace hearth can be prevented from being burnt by oxygen; recording the burning time T1 of the first thermocouple 2 and then recording the burning time T2 of the second thermocouple 3, wherein the distance between the first thermocouple 2 and the second thermocouple 3 is L, so that the burning speed V of the oxygen lance can be calculated, and the V is L/(T2-T1); the high-temperature resistant slurry 4 filled in the heat insulation chambers 1-4 forms a refractory material after being baked, so that the problem of over-quick burning loss of the oxygen lance in the use process can be solved; the drill bit 5 can smoothly drill the oxygen lance body into a preset position, so that the obstruction of residual iron slag and broken coke in the process that the oxygen lance body enters the iron notch channel is reduced; the arrangement of the endoscopic camera 6 can monitor whether the ignition of the oxygen lance in the furnace is successful, the generation time of the iron slag can be directly observed through the endoscopic camera 6, and the real-time monitoring of the oxygen burning process in the furnace can be realized.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. An oxygen lance for quickly opening a blast furnace is characterized in that: the oxygen lance comprises an oxygen lance main body (1), wherein the oxygen lance main body (1) comprises an inner pipe (1-1) and an outer pipe (1-2), the inner pipe (1-1) is coaxially arranged in the outer pipe (1-2), a gas channel (1-3) is formed in the inner pipe (1-1), a heat insulation chamber (1-4) is formed between the inner pipe (1-1) and the outer pipe (1-2), a first thermocouple (2) and a second thermocouple (3) are fixedly arranged in the heat insulation chamber (1-4) at intervals, high-temperature-resistant slurry (4) is filled in the heat insulation chamber (1-4), a drill bit (5) with a central through hole is coaxially and fixedly arranged at the front end of the oxygen lance main body (1) close to the first thermocouple (2), and the central through hole of the drill bit (5) is communicated with the gas channel (1-3), an endoscopic camera (6) is fixedly installed in the gas channel (1-3), and the endoscopic camera (6) irradiates the front end of the gas channel (1-3).

2. The oxygen lance for the rapid blast furnace opening according to claim 1, wherein: the rear end of the oxygen lance main body (1) is coaxially and detachably provided with an oxygen lance shank (7), and the oxygen lance shank (7) seals the rear end of the gas channel (1-3).

3. The oxygen lance for the rapid blast furnace opening according to claim 1, wherein: and a pressure measuring device (8) for detecting the pressure in the furnace is fixedly arranged on the outer pipe (1-2), and the pressure measuring device (8) is communicated with the gas channel (1-3).

4. The oxygen lance for the rapid blast furnace opening according to claim 3, wherein: the pressure measuring device (8) comprises a pressure leading pipe (8-1), the pressure leading pipe (8-1) is fixedly installed on the outer pipe (1-2), one end of the pressure leading pipe (8-1) is communicated with the gas channel (1-3), the other end of the pressure leading pipe is fixedly provided with a pressure gauge (8-2), a measuring head of the pressure gauge (8-2) is located in the pressure leading pipe (8-1), and the pressure leading pipe (8-1) is communicated with a ball valve (8-3).

5. The oxygen lance for the rapid blast furnace opening according to claim 1, wherein: the outer pipe (1-2) is fixedly provided with a high-pressure oxygen inlet (9) and a compressed air inlet (10) which are communicated with the gas channel (1-3), and the high-pressure oxygen inlet (9) is positioned at the front end of the compressed air inlet (10).