CN100572562C - The automatic monitoring clogging of metallurgy high furnace coal fines lance device - Google Patents
The automatic monitoring clogging of metallurgy high furnace coal fines lance device Download PDFInfo
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- CN100572562C CN100572562C CNB2005100319874A CN200510031987A CN100572562C CN 100572562 C CN100572562 C CN 100572562C CN B2005100319874 A CNB2005100319874 A CN B2005100319874A CN 200510031987 A CN200510031987 A CN 200510031987A CN 100572562 C CN100572562 C CN 100572562C
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Abstract
The invention discloses a kind of automatic monitoring clogging of metallurgy high furnace coal fines lance device, form by divider, coal powder injection manual ball valve, coal powder injection pneumatic ball valve, the purging pressure detector that purges pneumatic ball valve, purging manual ball valve, purging pressurized air ring pipe and installation thereof, the defeated coal person in charge, coal jetting branch, computer or PLC cabinet etc.When coal injection in blast-furnace tuyere, first shut-down purge pneumatic ball valve is opened the coal powder injection pneumatic ball valve; When coal jetting branch is blocked, close earlier to open again behind the coal powder injection pneumatic ball valve certain hour and purge pneumatic ball valve and allow and the blocked coal dust the coal jetting branch is blown down from the pressurized air that purges arm, on computer screen, demonstrate " opening ", " passs " state of each ball valve this moment, and according to the monitoring curve of purging pressure and other parameters can each root pulverized coal gun of remote monitoring obstruction whether.This cover monitoring device is suitable for the monitoring to the blocked pulverized coal gun of metallurgy high furnace, and effect is obvious.
Description
Technical field
The present invention relates to a kind of large-scale metallurgical high furnace coal fines lance automatic monitoring clogging device that is applied to.
Background technology
In order to reduce metallurgy high furnace ironmaking coke ratio and to improve other technico-economical comparison, in blast furnace ironmaking process in State of Blast Furnace the technology of coal injection and to adopt corresponding blowing device be that at present both at home and abroad blast furnace reduces the important means of ironmaking cost, but to stop up easily be one of problem of the most normal appearance in the coal powder injection operation to pulverized coal gun in coal injection process in State of Blast Furnace, if untimely processing, to seriously restrict the raising of coal powder injection level and influence the homogeneity of each tuyere injection, and the influence big to the stable formation of conditions of blast furnace.At present domesticly rely on manual observation mostly and manually dredge solving the pulverized coal gun blockage problem.How detecting that spray gun stops up and output signal is that pulverized coal gun stops up one of key that realizes monitoring automatically, also is the problems that better solve as yet of domestic most of iron and steel metallurgy enterprises at present.
Before the present invention, have and followingly severally can detect the be blocked method of situation of pulverized coal gun:
1. temperature checking method: under normal breeze blowing situation, the pipe surface temperature of the blocked subnormal relatively pulverized coal gun of pulverized coal gun pipe surface temperature, at export distributor, the pipe surface temperature of normal pulverized coal gun usually between 50～90 ℃, and duration of congestion the pipe surface temperature of long pulverized coal gun usually below 45 ℃.If adherent thermometric hot resistance or thermopair are installed on the tube wall of each coal spouting gun behind the divider, the pipe surface temperature of detected each coal spouting gun is sent to the blast furnace master control room, just can judges the numbering of concrete blocked coal spouting gun according to the variation of each coal spouting gun pipe surface temperature.Adopt this detection method need arrange more cable, and signal reaction is more blunt, and is subjected to weather effect bigger, temperature signal is inaccurate, and is easy inadequately directly perceived.The metallurgy high furnace of first guiding principle adopted this type of technology.
2. photoelectric detecting method: a cover pulverized coal gun occlusion detector promptly is installed behind each air port sight glass of metallurgy high furnace coal fines injection system, and the daylighting tubule that this detector has one section daylighting to use, the front end of this daylighting tubule have been installed a lenslet.One photovaristor is housed, with the zone, air port before the daylighting tubule aligning pulverized coal gun of detector in detector.When the normal coal powder injection of pulverized coal gun, the light that detector is sensed is darker, and the photovaristor resistance is bigger; When pulverized coal gun stopped up, the front end coal dust free of pulverized coal gun sprayed and just becomes bright, and the light that detector is sensed is brighter, and the photovaristor resistance diminishes.Again this photoreceptor signal is delivered to the real-time status that the metallurgy high furnace master control room can demonstrate each air port breeze blowing of this metallurgy high furnace through handling.The great advantage of this mode is that reaction is quick, and weak point to be this device must adopt bigger window large cover, spy on device and be subjected to spying on the influence that device stops up again easily.And the window device of China's metallurgy high furnace design is less usually, this cover detector need be arranged many cables after device is spied in the air port simultaneously, cable and detector itself very easily damages because of changing site works such as air-supply arrangement, processing spray gun, is difficult to use under existence conditions.
Summary of the invention
The object of the present invention is to provide a cover can be intuitively again reliably each pulverized coal gun of remote monitoring whether stop up and reach the automatic monitoring clogging of metallurgy high furnace coal fines lance device that can dredge blocked pulverized coal gun.
For achieving the above object, the technical solution used in the present invention is:
A kind of automatic monitoring clogging of metallurgy high furnace coal fines lance device of the present invention is by divider, the coal powder injection manual ball valve, the coal powder injection pneumatic ball valve, the heavy wall threeway, purge pneumatic ball valve, purge manual ball valve, the manual blowdown valve, purge arm, manual ball valve, purge pressure detector, purge the pressurized air ring pipe, the burstpressures controller, the divider pressure detector, support, the surface temperature measurement thermopair, coal jetting branch, defeated coal is responsible for and computer is formed, the coal powder injection manual ball valve, the coal powder injection pneumatic ball valve, the heavy wall threeway, purge pneumatic ball valve, purge manual ball valve, the manual blowdown valve, purging arm and coal jetting branch distributes around divider, the lower end of divider connects the end that defeated coal is responsible for, defeated coal is responsible for the surface temperature measurement thermopair is installed, the surface temperature measurement thermopair links to each other with computer, on divider, be processed with the individual discharge of N (integer of N 〉=1), one of the coal powder injection manual ball valve with divider on discharge be connected mutually, the other end of coal powder injection manual ball valve connects an end of coal powder injection pneumatic ball valve, and the other end of coal powder injection pneumatic ball valve is connected with a jaw of heavy wall threeway.Top at divider is equipped with manual ball valve, a connection divider pressure detector of manual ball valve, and the divider pressure detector links to each other with computer.Purge the pressurized air ring pipe and assemble, purge on the pressurized air ring pipe and have the individual interface of N ' (integer of N ' 〉=1), wherein purge the discharge that the number of ports N ' on the pressurized air ring pipe equals on the divider and count N around divider.The purging arm is installed on each interface, one that purges arm connects an end that purges manual ball valve, the other end that purges manual ball valve connects one that purges pneumatic ball valve, the other end that purges pneumatic ball valve is connected with a jaw of heavy wall threeway, another jaw of heavy wall threeway connects an end of coal jetting branch, and the other end of coal jetting branch extends blast-furnace tuyere.On the pipe connecting that purges pneumatic ball valve and heavy wall threeway the manual blowdown valve is housed, on purging pressurized air ring pipe manual ball valve is installed, one of manual ball valve connects the purging pressure detector, purges pressure detector and link to each other with computer.Purge on the pressurized air ring pipe manual ball valve is installed, one of manual ball valve connects the burstpressures controller, and the burstpressures controller links to each other with computer.
Adopt automatic monitoring clogging of metallurgy high furnace coal fines lance device that as above technical scheme provided compared with prior art, its beneficial effect is:
1. help improving injecting coal quantity: this device can not only detect blocked spray gun, and can dredge blocked spray gun periodically automatically, the number of actual coal spouting gun when having improved pulverized coal injection greatly, and injecting coal quantity can obtain bigger raising.
2. help improving the homogeneity of pulverized coal injection: because blocked spray gun can in time obtain mediation, avoided many and even spray gun in blocks to stop up for a long time, improved the homogeneity of pulverized coal injection, reduced the inhomogeneous disadvantageous effect of bringing to blast furnace of coal powder injection;
3. help prolonging the work-ing life of spray gun: because the spray gun of blocked obstruction can in time be found and handle to this device, brought up to 2-3 month by original about one month the work-ing life of spray gun, even longer;
4. alleviate labor intensity of operating staff: not only reduced artificial clear rifle quantity, and improved the specific aim of the clear rifle of operating personnel, saved unnecessary cycle check.
5. help strengthening the monitoring of coal injection process: the writing function of this monitoring device can show blocked rifle position and blocked time, the quality of ball valve working order and the changing conditions of key parameter automatically, be convenient to the operating personnel coal injection process is carried out detailed monitoring and summing up experience in time, thereby take appropriate measures.
Description of drawings
Fig. 1 is the topology layout synoptic diagram of automatic monitoring clogging of metallurgy high furnace coal fines lance device of the present invention, also is Figure of abstract of the present invention.
The working condition synoptic diagram of Fig. 2 for showing on 28 pulverized coal gun monitored pictures of automatic monitoring clogging of metallurgy high furnace coal fines lance device of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Described automatic monitoring clogging of metallurgy high furnace coal fines lance device is by divider 1, coal powder injection manual ball valve 2 or 21, coal powder injection pneumatic ball valve 3 or 31, heavy wall threeway 4 or 41, purge pneumatic ball valve 5 or 51, purge manual ball valve 6 or 61, manual blowdown valve 7 or 71, purge arm 8 or 81, manual ball valve 9 or 91 or 92, purge pressure detector 10, purge pressurized air ring pipe 11, burstpressures controller 12, divider pressure detector 13, support 14, surface temperature measurement thermopair 15, coal jetting branch 16 or 16 ', defeated coal is responsible for 17, computer 18 and corresponding wire are formed, and comprise signal wire in these wires, control line.Axis with divider 1 is a medullary ray, coal powder injection manual ball valve 2 or 21, coal powder injection pneumatic ball valve 3 or 31, heavy wall threeway 4 or 41, purge pneumatic ball valve 5 or 51, purge manual ball valve 6 or 61, manual blowdown valve 7 or 71, purge arm 8 or 81 and coal jetting branch 16 or 16 ' distribute around divider 1, this distribution the best is a uniform distribution.By coal powder injection manual ball valve 2 (or 21), coal powder injection pneumatic ball valve 3 (or 31), heavy wall threeway 4 (or 41), purge pneumatic ball valve 5 (or 51), purge manual ball valve 6 (or 61), manual blowdown valve 7 (or 71), purging arm 8 (or 81) and coal jetting branch 16 (or 16 ') form the pulverized coal gun that coal injection is used, and divider 1 and manual ball valve 91 or divider pressure detector 13 mounted thereto, purge pressurized air ring pipe 11 and manual ball valve 9 mounted thereto 92 or purge pressure detector 10 or burstpressures controller 12 shared by each root pulverized coal gun.Figure 1 shows that and be symmetrically arranged in around the divider 1
Number pulverized coal gun with
The topology layout synoptic diagram of number pulverized coal gun.The lower end of divider 1 connects defeated coal and is responsible for an end of 17, the defeated coal person in charge's 17 the other end inserts the coal dust output mouth of pipe in coal powder injection workshop, front end the defeated coal person in charge 17 also has mixing tank and flow detector, be responsible for 17 surface temperature in order to detect defeated coal, defeated coal is responsible on 17 surface temperature measurement thermopair 15 is installed, and links to each other with wire between surface temperature measurement thermopair 15 and computer 18 or the PLC cabinet.Surface temperature measurement thermopair 15 can be bought product for market, and as RTD4AL type thermopair, the changing conditions that purpose is to be responsible for 17 surface temperatures according to the defeated coal defeated coal of heating automatically is responsible for 17, prevents that being responsible for 17 coolings because of defeated coal gets damp coal dust to cause the coal dust obstruction.On divider 1, be processed with the individual discharge of N (integer of N 〉=1), a coal powder injection be installed on each discharge of divider 1 be in charge of (two coal powder injections of having drawn are in charge of) in accompanying drawing 1, be full of the pressurized air that coal dust and pulverized coal conveying are used in the divider 1.Coal powder injection manual ball valve 2 or 21 one and discharge on the divider 1 be connected mutually (as welding), coal powder injection manual ball valve 2 or 21 other end connect an end of coal powder injection pneumatic ball valve 3 or 31, the coal powder injection pneumatic ball valve 3 or 31 the other end are connected with a jaw of heavy wall threeway 4 or 41, in the ordinary course of things, coal powder injection manual ball valve 2 or 21 is often opened.At the top of divider 1 manual ball valve 91 is installed, a connection divider pressure detector 13 of manual ball valve 91, link to each other with wire between divider pressure detector 13 and computer 18 or the PLC cabinet, the pressure change signal of divider 1 can be flowed to computer 18.Under general state, manual ball valve 91 is opened, and can detect the pressure changing in the divider 1 at any time, can close manual ball valve 91 when need maintenance divider pressure detector 13.Described divider pressure-detecting device 13 can be bought product for market, as the C8Y0014 series product.Purge pressurized air ring pipe 11 around divider 1 assembling, on purging pressurized air ring pipe 11, have the individual interface of N ' (integer of N ' 〉=1); The discharge that number of ports N ' on the purging pressurized air ring pipe 11 equals on the divider 1 is counted N.On each interface, be equipped with and purge arm 8 or 81, one that purges arm 8 or 81 connects an end that purges manual ball valve 6 or 61, and the other end that purges manual ball valve 6 or 61 connects (purging manual ball valve 6 or 61 under normal conditions opens) that purges pneumatic ball valve 5 or 51.The other end that purges pneumatic ball valve 5 or 51 is connected with a jaw of heavy wall threeway 4 or 41, heavy wall threeway 4 or another jaw connection coal jetting branch 16 or 16 of 41 ' an end, coal jetting branch 16 or 16 ' the other end extend blast-furnace tuyere.Purge pneumatic ball valve 5 or 51 with the pipe connecting of heavy wall threeway 4 or 41 on manual blowdown valve 7 or 71 are housed, when purging arm 8 or 81 and purge manual ball valve 6 or 61 and purge pneumatic ball valve 5 or 51 when dirt is arranged, can be through manual wash water valve 7 or 71 discharges.On purging pressurized air ring pipe 11, manual ball valve 9 is installed, one of manual ball valve 9 connects purging pressure detector 10, can detect the pressure change that purges in the pressurized air ring pipe 11 at any time by purging pressure detector 10, and pressure change signal flowed to computer 18 or PLC cabinet through signal wire, and monitor each spray gun and whether stop up by purging purging pressure detector 10 detected pressure signals on the pressurized air ring pipe 11.Purge pressure detector 10 and link to each other with wire, purge pressure detector 10 and can buy product, as the intellectual pressure unit of EJA430A type for market with computer 18 or PLC cabinet.When need maintenance or maintenance purging pressure detector 10, can close manual ball valve 9.Be equipped with manual ball valve 92 on purging pressurized air ring pipe 11, one of manual ball valve 92 connects burstpressures controller 12, and wherein burstpressures controller 12 can be bought product for market, as EYD 16LX type explosion-proof pressure controller.When need maintenance burstpressures controller 12, can close manual ball 92.The purpose that burstpressures controller 12 is installed is to control the compressed-air actuated pressure that purges in the pressurized air ring pipe 11 in specialized range, and the burstpressures signal is flowed to computer 18 or PLC cabinet through signal wire, security incident occurs to exert oneself.Burstpressures controller 12 links to each other with wire with computer 18 or PLC cabinet.Accompanying drawing 2 28 pulverized coal gun working condition synoptic diagram on computer 18 display screens, showing, on every pulverized coal gun, include coal powder injection pneumatic ball valve 3 or 31, coal powder injection manual ball valve 2 or 21, purge pneumatic ball valve 5 or 51, purge manual ball valve 6 or 61, purge arm 8 or 81, coal jetting branch 16 or 16 ' and heavy wall threeway 4 or 41.When coal injection was working properly, coal powder injection pneumatic ball valve 3 or 31 was opened (representing with green) on display screen, closed (representing with redness) and purge pneumatic ball valve 5 or 51 on display screen.If when a certain coal powder injection pneumatic ball valve 3 or 31 breaks down with purging pneumatic ball valve 5 or 51, on display screen, represent with yellow.When the coal injection work of certain root pulverized coal gun is undesired, then computer 18 cuts out coal powder injection pneumatic ball valve 3 or 31 certain hours earlier through control line, open through control line again and purge pneumatic ball valve 5 or 51, be coal powder injection pneumatic ball valve 3 or 31 and purge pneumatic ball valve 5 or 51 and interlock each other, can avoid purging pressurized air like this and enter divider 1.The pressurized air that from purge pressurized air ring pipe 11, comes through purge arm 8 or 81 with coal jetting branch 16 or 16 ' in the coal dust that is blocked blow out, the purge time of every pulverized coal gun was advisable with 30～50 seconds, because of the long system pressure that can fall low-pressure air significantly of purge time, influence purges effect and wastes energy, and purge cycles once was advisable all 28 pulverized coal guns purgings with 1.0～1.5 hours, because of purge cycles too short, coal powder injection pneumatic ball valve 3 or 31 acts frequently with purging pneumatic ball valve 5 or 51, influence its work-ing life, the oversize blocked pulverized coal gun of control in time that then is difficult to of purge cycles.For guaranteeing is the purging pressure of blunderbuss, many pulverized coal guns can not be got to manual purge position simultaneously.
During enforcement, according to attached all 1 or accompanying drawing 2 automatic monitoring clogging of metallurgy high furnace coal fines lance device of the present invention is assembled, and this device is arranged on the support 14, simultaneously with in the blast furnace master control room with the computer 18 of coal powder injection master control room networking or PLC cabinet with surface temperature measurement thermopair 15, divider pressure detector 13, purge pressure detector 10, be connected with wire between the burstpressures controller 12, simultaneously will with coal powder injection pneumatic ball valve 3 or 31, purge signal wire or control line access computer 18 that pneumatic ball valve 5 or 51 is connected, the display screen of machine 18 is known " opening " of each pneumatic ball valve as calculated, " pass " situation.If the coal injection situation is normal, then coal powder injection manual ball valve 2 or 21, coal powder injection pneumatic ball valve 3 or 31 are in " opening " state, demonstrate green on the display screen of computer 18, corresponding purging pneumatic ball valve 5 or 51, purging manual ball valve 6 or 61 are in " closing " state, demonstrate redness on the display screen of computer 18; If the coal injection situation is undesired, be operated in the spray gun purge stages, coal powder injection this moment manual ball valve 2 or 21, coal powder injection pneumatic ball valve 3 or 31 are in " closing " state, demonstrate redness on the display screen of computer 18, and purge pneumavalve 5 or 51, purge manual ball valve 6 or 61 and be in " opening " state, demonstrate green on the display screen of computer 18; If certain group ball valve breaks down, on the display screen of computer 18, demonstrate yellow.Remove this, the winding-up of each root pulverized coal gun is had automatically and manual two kinds of control modes: automatic control mode represents with green point that on the display screen of computer 18 manual control mode is represented with red point on the display screen of computer 18.
The monitored picture (divider monitored picture as shown in Figure 2) that trend curve that can provide according to automatic monitoring clogging of metallurgy high furnace coal fines lance device of the present invention and computer 18 provide, the blast furnace operating personnel can judge the working condition of whole coal injection system at the coal powder injection master control room, as judge the transportation concentration of the blocked rifle of spray gun number and time, coal dust and to the wearing and tearing possibility of air port and pipeline etc.The computer 18 of this automatic monitoring device has signal wire or control line to be connected with the coal powder injection pneumatic ball valve 3 or 31 of each root pulverized coal gun, purging pneumatic ball valve 5 or 51, thereby whether this automatic monitoring device normally can judge and provide guard signal to the operation of each pneumatic ball valve, guard signal makes operator in time grasp the ball valve that has occurred fault with this device of monitoring, as ball valve jam, malfunctioning switch etc.Because divider pressure detector 13 is connected with computer 18, the pressure history that shows from computer 18 display screens just can be judged the rifle number and the time of stopping up of concrete obstruction, and the divider jetting pressure that demonstrates from computer 18 display screens and the differential pressure curve of blast-furnace hot-air pressure can be judged the integral status of spray gun obstruction.Normally have more spray gun to stop up as the big then explanation of differential pressure rising down in the metallurgy high furnace operating mode, the coal powder injection ball valve that demonstrates out of order pulverized coal gun on monitored picture is represented with yellow.Surface temperature measurement thermopair 15 can detect defeated coal and be responsible for 17 surface temperature, and the trend curve of the Guan Wen that shows from computer 18 display screens can be made assessment to the newness degree of coal injection and spray property.
Claims (2)
1, a kind of automatic monitoring clogging of metallurgy high furnace coal fines lance device, it is characterized in that: it is by divider (1), coal powder injection manual ball valve (2,21), coal powder injection pneumatic ball valve (3,31), heavy wall threeway (4,41), purge pneumatic ball valve (5,51), purge manual ball valve (6,61), manual blowdown valve (7,71), purge arm (8,81), manual ball valve (9,91,92), purge pressure detector (10), purge pressurized air ring pipe (11), burstpressures controller (12), divider pressure detector (13), support (14), surface temperature measurement thermopair (15), coal jetting branch (16,16 '), defeated coal is responsible for (17) and computer (18) is formed, coal powder injection manual ball valve (2,21), coal powder injection pneumatic ball valve (3,31), heavy wall threeway (4,41), purge pneumatic ball valve (5,51), purge manual ball valve (6,61), manual blowdown valve (7,71), purge arm (8,81) and coal jetting branch (16,16 ') around divider (1), distribute, the lower end of divider (1) connects the end that defeated coal is responsible for (17), defeated coal is responsible on (17) surface temperature measurement thermopair (15) is installed, surface temperature measurement thermopair (15) links to each other with computer (18), be processed with N discharge on divider (1), N is the integer more than or equal to 1; One of coal powder injection manual ball valve (2,21) with divider (1) on discharge be connected mutually, the other end of coal powder injection manual ball valve (2,21) connects an end of coal powder injection pneumatic ball valve (3,31), and the other end of coal powder injection pneumatic ball valve (3,31) is connected with a jaw of heavy wall threeway (4,41); At the top of divider (1) manual ball valve (91) is installed, a connection divider pressure detector (13) of manual ball valve (91), divider pressure detector (13) links to each other with computer (18); Purge pressurized air ring pipe (11) around divider (1) assembling, purge on the pressurized air ring pipe (11) and have the individual interface of N ', N ' is for equaling the integer greater than 1; On each interface, be equipped with and purge arm (8,81), one that purges arm (8,81) connects an end that purges manual ball valve (6,61), the other end that purges manual ball valve (6,61) connects one that purges pneumatic ball valve (5,51), the other end that purges pneumatic ball valve (5,51) is connected with a jaw of heavy wall threeway (4,41), another jaw of heavy wall threeway (4,41) connects an end of coal jetting branch (16,16 '), and the other end of coal jetting branch (16,16 ') extends blast-furnace tuyere; On the pipe connecting that purges pneumatic ball valve (5,51) and heavy wall threeway (4,41), manual blowdown valve (7,71) is housed, on purging pressurized air ring pipe (11), manual ball valve (9) is installed, one of manual ball valve (9) connects purging pressure detector (10), purges pressure detector (10) and link to each other with computer (18); Purge on the pressurized air ring pipe (11) manual ball valve (92) is installed, one of manual ball valve (92) connects burstpressures controller (12), and burstpressures controller (12) links to each other with computer (18).
2, a kind of automatic monitoring clogging of metallurgy high furnace coal fines lance device according to claim 1, it is characterized in that: the discharge that the number of ports N ' on the purging pressurized air ring pipe (11) equals on the divider (1) is counted N, and wherein N ', N are the integer more than or equal to 1.
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| CN101216148B (en) * | 2007-12-27 | 2013-03-06 | 夏俊双 | Coal gas explosion-proof rapid purging device |
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| JP5436248B2 (en) * | 2010-02-03 | 2014-03-05 | 和三 長谷川 | Low pressure air supply system |
| CN102230042B (en) * | 2011-07-08 | 2013-06-12 | 中冶南方工程技术有限公司 | Control method for preventing blockage of coal injection branch pipes of distributor in blast furnace coal injection system |
| CN102220444B (en) * | 2011-07-08 | 2013-06-12 | 中冶南方工程技术有限公司 | Anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace |
| CN105158322B (en) * | 2015-06-09 | 2018-08-07 | 亚洲硅业（青海）有限公司 | A kind of pretreating device analyzed for trace impurity in polysilicon |
| CN105739422B (en) * | 2016-02-15 | 2019-01-01 | 无锡旺绿鸿纺织品有限公司 | Full-automatic spraying gun anti-blocking system and its control process |
| CN106755675A (en) * | 2016-11-18 | 2017-05-31 | 内蒙古包钢钢联股份有限公司 | The method of breeze blowing pipe-line system and quick treatment coal spraying pipeline Severe blockage |
| CN108179242A (en) * | 2018-02-08 | 2018-06-19 | 柳州钢铁股份有限公司 | Blast furnace coal gun surveys stifled system online |
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