CN105238895B - Hearth plate protection system for blast furnace - Google Patents
Hearth plate protection system for blast furnace Download PDFInfo
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- CN105238895B CN105238895B CN201510762361.4A CN201510762361A CN105238895B CN 105238895 B CN105238895 B CN 105238895B CN 201510762361 A CN201510762361 A CN 201510762361A CN 105238895 B CN105238895 B CN 105238895B
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Abstract
The invention discloses a hearth plate protection system for a blast furnace, and belongs to the technical field of blast furnace equipment. The hearth plate protection system comprises pressurization devices, temperature sensors, pressure sensing devices and castable material. The pressurization devices act on the upward-warping periphery of an upward-warping hearth closing plate directly or through the pressure sensing devices. The temperature sensors are arranged in the gap between an H-shaped hearth beam and the upward-warping hearth closing plate, and the castable material fills the gap. According to the invention, the pressure change of the upward-warping periphery and the bottom temperature change of the hearth closing plate of the blast furnace can be detected online and continuously through the pressurization devices, the pressure sensing devices and the temperature sensors, real-time data of multiple measurement points are provided so that the pressure change and the temperature change of the hearth closing plate can be analyzed conveniently, and the hearth closing plate of the blast furnace can be prevented from warping upwards continuously. The bottom surface temperature data and the pressure data of the upward-warping hearth closing plate can be used for supporting safety production of smelting of the blast furnace and finding out the reason of upward-warping of the hearth closing plate.
Description
Technical field
The invention belongs to blast-furnace equipment technical field, specifically a kind of blast furnace base protection system.
Background technology
The large-scale blast furnace in the whole world, with the change that blast furnace process is produced, as shown in figure 1, part blast furnace has occurred stove
Bottom sealing plate is upwarped, and upwarping furnace bottom shrouding can aggravate as the blast-furnace production campaign increases；Deformation can seriously cause cupola well to damage, leakage coal
Gas directly influences the person and equipment safety.Furnace bottom shrouding is upwarped at present the origin cause of formation there is no both at home and abroad it is clearly qualitative, while furnace bottom
Shrouding rises stress and joins with the technique such as top pressure, wind pushing temperature, top temperature, temperature, materials load and materials structure in State of Blast Furnace
The relations such as number also do not have quantitative measurment data.Therefore at this stage most blast furnaces cause because furnace bottom shrouding is upwarped blast furnace fail full load,
Full top pressure operation, does not reach the target of economical operation.
It is because furnace bottom shrouding excessively upwarps the consequence for more clearly resulting in：
1st, last furnace shell goes up；
2nd, stock gas delivery line bellows deformation；
3rd, furnace roof weighing pot and the interference of upper platform beam is weighed impacted；
4th, ten layers of cooling wall outside pipe arrangement are extruded weld seam leak by platform；
5th, air plane is raised, and blowpipe is upwarped, and blowpipe burn-through accident etc. occurs.
China Patent Publication No. CN104313217A, publication date 2015.01.28 discloses a kind of Blast Furnace Bottom, predominantly
A kind of better tightness of offer, the blast furnace bottom sealing plate is avoided to upwarp, prevent the Blast Furnace Bottom of burn-through of furnace hearth.The invention State of Blast Furnace
Bottom, including lower shrouding, concrete piers and upper sealing plate, between the concrete piers and the furnace shell carbon is provided with
Ramming mass, between the upper surface of the upper sealing plate and the concrete piers cooling water pipe is provided with.The invention Blast Furnace Bottom
Upper sealing plate and lower shrouding formed Blast Furnace Bottom two seals defence line, improve the sealing property of Blast Furnace Bottom.Coagulation soil matrix
Pier forms rigid box with upper and lower shrouding, only has furnace bottom compared to base plate of the prior art top and completely spreads for carbon brick, more can
Upwarping for the lower shrouding of enough opposings, that is, resist upwarping for base plate.Cooling water pipe is arranged on into the lower section of upper sealing plate, it is to avoid furnace bottom is cold
But pipe burst causes the major accident of burn-through of furnace hearth to occur.The invention is arranged by the improvement of Blast Furnace Bottom and by cooling water pipe
Avoid causing furnace bottom Cooling Pipe Crack because blast furnace bottom sealing plate is upwarped below upper sealing plate, but not to having occurred and that
The problem that blast furnace bottom sealing plate is upwarped carries out effectively solving.
The content of the invention
1. the invention technical problem to be solved
Major safety risks and heavy economic losses are caused for there is a problem of that blast furnace bottom sealing plate is upwarped in prior art,
The invention provides a kind of blast furnace base protection system.It can be realized using pressue device, pressure sensitive device and temperature
Sensor, on-line continuous detection Blast Furnace Bottom shrouding upwarps circumferential pressure change and bottom surface temperature change, there is provided many measurement point realities
When data be easy to be analyzed furnace bottom shrouding pressure and temperature change, and while suppress the mesh that persistently upwarps of blast furnace bottom sealing plate
's.Data support can be provided for blast furnace process safety in production using furnace bottom shrouding bottom surface temperature and pressure data are upwarped simultaneously,
There is provided the reason for furnace bottom shrouding is upwarped data analysis to find accurately, and carry out for the raising of blast furnace process production enhancement economic and technical norms
Data analysis.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the present invention is provided is：
A kind of blast furnace base protection system, pressue device, temperature sensor, pressure sensitive device and castable, wherein：
Pressue device directs or through pressure sensitive device and acts on the periphery for upwarping for upwarping furnace bottom shrouding；Temperature sensor sets
It is placed in furnace bottom H fine strains of millet and upwarps in the gap between furnace bottom shrouding；Castable is filled in the gap.
Further scheme, pressue device is crab-bolt pressue device, including cast-in fixing bolt, pressing plate A, nut A and cushion block；In advance
Bury crab-bolt bottom to be inserted in the reserved basis drilling of last furnace shell outside, blast furnace foundation, top passes through pressing plate A, and with pressing plate A
It is slidably connected；One end of pressing plate A bottom faces is pressed in cushion block upper surface, and the other end directs or through pressure sensitive device and acts on
The periphery for upwarping of furnace bottom shrouding is upwarped, down spiral presses by the screw top of nut A and cast-in fixing bolt for its upper surface.
Further scheme, pressure sensitive device includes from top to bottom the top board of horizontal, pressure sensor and base plate successively；
Cushion block bottom is lined with backing plate；The thickness of backing plate and base plate according to upwarp furnace bottom shrouding upwarp height or crab-bolt pressue device spiral
Press stroke to adjust the balance at pressing plate A two ends.
Further improved scheme, also including hold down gag, the main body section of hold down gag is in left-right asymmetry " soil "
Font, including pressing plate B parallel to each other and substrate, and the bolt being fixedly connected on through after pressing plate B on substrate；And by spiral shell
Female B adjusts the height of pressing plate B；Substrate insertion upwarps furnace bottom shrouding bottom and furnace bottom H fine strains of millet are fixedly connected by welding, and by pressure
Plate B is pressed in and upwarps the periphery that furnace bottom shrouding is upwarped, and the B compactings of rotation nut upwarp furnace bottom shrouding；The junction of bolt and substrate, spiral shell
Bolt both sides are respectively welded gusset A and gusset B.
Further improved scheme, cushion block and pressure sensor are symmetrical arranged in cast-in fixing bolt both sides；The periphery of castable
It is fixed with annular retaining ring.
Further improved scheme, temperature sensor is 21 group, annular retaining ring to furnace bottom H fine strains of millet and is upwarping furnace bottom shrouding
Between the gap end be uniformly arranged；Pressure sensor is 1 group of adjacent 4.
Further improved scheme, temperature sensor is 16 groups, and pressure sensor is 4 groups, in blast furnace bottom surface even circumferential
Distribution；Crab-bolt pressue device and hold down gag are uniformly distributed after blast furnace base circumference staggers.
Further improved scheme, castable is high heat conduction gravity flow pouring material, including SiC, corundum, water reducer, dispersant
And aqueous binders.
Further improved scheme, the parts by weight of each dispensing of castable are：SiC, 80～90 parts；Aqueous binders, 20
～30 parts；Corundum, 9～19 parts；Totally 1 part of water reducer and dispersant.
Further improved scheme, installs nut A and nut B, to crab-bolt pressue device, pressure by torque spanner fastening
Induction installation and hold down gag pressurize, and fasten by same torque, keep crab-bolt pressue device, pressure sensitive device and compress dress
Put the periphery that upwarps to upwarping furnace bottom shrouding and apply uniform pressure；4 groups of pressure sensors connect respectively 4 instrument boxs, and pressure is passed
Sensor signal accesses the weight transmitter in instrument box, and by weight transmitter data signal is converted into, then sends weighing instrument to
Table, weighing instrument can simultaneously show the pressure signal of each pressure sensor and the gross pressure of 4 pressure sensors, and
By analog signalses or bus signals Long Distant Transmit to control system.
3. beneficial effect
Using the present invention, have the advantages that：
(1) blast furnace base protection system of the invention, reflects that furnace bottom shrouding upwarps pressure by pressure sensitive device
Change, by temperature sensor the change of bottom temperature is reflected, prevents from further upwarping by pressue device, in conjunction with furnace roof pressure
The parameters such as power, wind pushing temperature are analyzed, you can the reason for finding furnace bottom shrouding accurately substantially and upwarp, and are to control upwarping for furnace bottom shrouding
There is provided data to support, and be finally to solve the problems, such as that blast furnace bottom sealing plate is upwarped to cause major safety risks and heavy economic losses to beat
Good basis down.
(2) blast furnace base protection system of the invention, crab-bolt pressue device installs simple, and low cost, pressure effect is good；
(3) blast furnace base protection system of the invention, the flat of pressing plate two ends is adjusted by the thickness of backing plate and base plate
Weighing apparatus, easy to operate, low cost；
(4) blast furnace base protection system of the invention, furnace shell rise is balanced with hold down gag to the pulling force of furnace bottom H beams
Power, so as to effectively inhibit persistently upwarping for furnace bottom shrouding is upwarped；And then the impact that furnace bottom shrouding is upwarped is eliminated, stabilize height
Stove is produced, and maintains every economic and technical norms of blast fumance, and for blast furnace technology operation effectively guarantee is provided；
(5) blast furnace base protection system of the invention, annular retaining ring avoids castable extravasation aqueous when pouring into a mould；To protect
Card castable can buffer furnace bottom shrouding pressure；Cushion block and pressure sensor are symmetrical arranged, it is to avoid pressing plate A both sides unbalance stress,
Build-up of pressure data acquisition can not stablize；Castable being capable of effective fixed temperature sensor, it is to avoid cause unnecessary displacement, and
Affect the accuracy of temperature acquisition；
(6) blast furnace base protection system of the invention, the temperature for upwarping furnace bottom shrouding all is from in-furnace temperature and passes through
To the conduction heat of furnace bottom shrouding, under normal circumstances, bottom temperature is substantially invariable to cupola well, once and occur because of furnace bottom shrouding
Cupola well damage, the situation of leakage gas for causing is upwarped, the heat of furnace bottom is delivered in stove will be increased, and reflect bottom temperature
Increase, and adopt pre-buried thermal resistance detection bottom temperature just can indirectly reflect cupola well furnace bottom situation；
(7) blast furnace base protection system of the invention, the dispensing of castable ensure that its high intensity and high-fire resistance energy,
Accurate acquisition for data provides good basic condition；
(8) blast furnace base protection system of the invention, the composition proportion of castable is inventor according to Blast Furnace Bottom
The small space of special operation condition, hold down gag and the furnace bottom shrouding for upwarping, the furnace bottom shrouding for upwarping upwarp the combined factors such as power and examine
Consider, first draft castable rupture strength, resistance to thermal parameter, compression strength and thermal conductivity factor parameter, meticulously apolegamy dispensing and proportioning, Jing
Data acquisition repeatedly and checking are crossed, the composition proportion for finally drawing；
(9) blast furnace base protection system of the invention, the use of crab-bolt pressue device and hold down gag, it is to avoid excessive to make
Cause data acquisition amount excessive with pressure sensor, it is only necessary to using a small amount of pressure sensitive device, it is only necessary to tight by same torque
Gu nut, crab-bolt pressue device can reflect the pressure of pressure sensor, equipment cost and data processing cost are reduced.
(10) blast furnace base protection system of the invention, upwarps pressure and furnace top pressure, send by setting up furnace bottom shrouding
Data correlation between air temperature, bottom temperature, the change of each parameter is finding rule when upwarping pressure alarm with reference to furnace bottom shrouding
Rule, you can find out furnace bottom and upwarp main cause.
Description of the drawings
Fig. 1 is the view for upwarping furnace bottom shrouding of the present invention；
Fig. 2 is the temperature sensor location schematic diagram of the present invention；
Fig. 3 is the crab-bolt pressue device pressure pressure sensitive schematic device of the present invention；
Fig. 4 is that the direct pressure of crab-bolt pressue device of the present invention upwarps furnace bottom shrouding schematic diagram；
Fig. 5 is that the hold down gag pressure of the present invention upwarps furnace bottom shrouding schematic diagram；
Fig. 6 is temperature sensor furnace bottom distribution schematic diagram in the embodiment of the present invention 1；
Fig. 7 is the instrument box structure schematic diagram of the embodiment of the present invention 1；
Fig. 8 is the daily Change in Mean curve model of bottom temperature in embodiment 1；
Fig. 9 is the daily Change in Mean curve model of drop-bottom institute measuring pressure in embodiment 1；
Figure 10 is the daily Change in Mean curve model of correspondence furnace top pressure in embodiment 1；
Figure 11 is the daily Change in Mean curve model of correspondence hot blast temperature in embodiment 1.
Label declaration in schematic diagram：2nd, crab-bolt pressue device；3rd, pressure sensitive device；4th, hold down gag；5th, stove is upwarped
Bottom sealing plate；6th, castable；7th, annular retaining ring；8th, blast furnace foundation；9th, furnace bottom H fine strains of millet；10th, last furnace shell；11st, temperature sensor；21、
Cast-in fixing bolt；22nd, pressing plate A；23rd, nut A；24th, cushion block；25th, backing plate；31st, top board；32nd, pressure sensor；33rd, base plate；34、
Basis drilling；41st, bolt；42nd, nut B；43rd, pressing plate B；44th, substrate；45th, gusset A；46th, gusset B.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.
As shown in figure 1, because components of iron ore is more complicated, also Jing is commonly present some problems to the stability of Iron grade, refining
Iron blast furnace has occurred that furnace bottom shrouding is upwarped with the lasting change for smelting production status, part blast furnace, and blast furnace volume is bigger, becomes
Shape amount also can be bigger, and, upwarping furnace bottom shrouding can aggravate as the blast-furnace production campaign increases, and gradually form the bottom of a pan of periphery tilting
Shape.
Embodiment 1
A kind of blast furnace base protection system of the present embodiment, including pressue device, temperature sensor 11, pressure sensitive dress
3 and castable 6 are put, wherein：The pressue device can be air pressure or hydraulic means, direct or through pressure sensitive device 3
Act on the periphery for upwarping for upwarping furnace bottom shrouding 5；As shown in Fig. 2 the temperature sensor 11 is arranged at the He of furnace bottom H fine strains of millet 9
In upwarping the gap between furnace bottom shrouding 5；The castable 6 is filled in furnace bottom H fine strains of millet 9 and upwarps the gap between furnace bottom shrouding 5
In.In the present embodiment, pressue device is crab-bolt pressue device 2, including cast-in fixing bolt 21, pressing plate A22, nut A23 and cushion block 24；
In the basis drilling 34 that the bottom of the cast-in fixing bolt 21 is inserted in the outside of last furnace shell 10, blast furnace foundation 8 is reserved, top is through pressure
Plate A22, and be slidably connected with pressing plate A22；One end of pressing plate A22 bottom faces is pressed in the upper surface of cushion block 24, as shown in Fig. 4 and Fig. 3,
The other end directs or through pressure sensitive device 3 and acts on the periphery for upwarping for upwarping furnace bottom shrouding 5, and its upper surface passes through spiral shell
Down spiral presses the screw top of female A23 and cast-in fixing bolt 21.The pressure sensitive device 3 includes from top to bottom horizontal successively
Top board 31, pressure sensor 32 and base plate 33；The bottom of the cushion block 24 is lined with backing plate 25；The thickness of the backing plate 25 and base plate 33
Degree according to upwarp furnace bottom shrouding 5 upwarp height or the spiral of crab-bolt pressue device 2 pressure stroke come adjust pressing plate A22 two ends put down
Weighing apparatus；Cushion block 24 and pressure sensor 32 are symmetrical arranged in the both sides of cast-in fixing bolt 21；The periphery of the castable 6 is fixed with annular gear
Circle 7；Temperature sensor 11 is 21 group, in annular retaining ring 7 to furnace bottom H fine strains of millet 9 and to upwarp the gap end between furnace bottom shrouding 5 equal
Even setting；The pressure sensor 32 is adjacent 41 group；Temperature sensor 11 is 16 groups, and the pressure sensor 32 is 4
Group, the even circumferential distribution in blast furnace bottom surface；The crab-bolt pressue device 2 and hold down gag 4 are equal after blast furnace base circumference staggers
Even distribution；Castable 6 is high heat conduction gravity flow pouring material, including SiC, corundum, water reducer, dispersant and aqueous binders are respectively matched somebody with somebody
The parts by weight of material are：SiC, 80 parts；Aqueous binders, 30 parts；Corundum, 9 parts；Totally 1 part of water reducer and dispersant, after testing
Work, { 100 DEG C, (200 DEG C × 24h) } of its thermal conductivity factor is 14w/m.k；Nut A23 is installed by torque spanner fastening, to crab-bolt
Pressue device 2 and pressure sensitive device 3 pressurize, and fasten by same torque, keep crab-bolt pressue device 2 and pressure sensitive device
3 pairs of peripheries that upwarp for upwarping furnace bottom shrouding 5 apply uniform pressure；As shown in fig. 7, pressure sensor 32 connects respectively 4 described in 4 groups
Individual instrument box, the signal of pressure sensor 32 accesses the weight transmitter in instrument box, and by weight transmitter digital letter is converted into
Number, then sending weighing instrument to, weighing instrument can simultaneously show the pressure signal of each pressure sensor 32 and 4 pressure
The gross pressure of sensor 32, and by analog signalses or bus signals Long Distant Transmit to control system；
The application of a kind of blast furnace base protection system of the present embodiment, with a 4000m3As a example by blast furnace, its furnace bottom half
, there is furnace bottom shrouding and upwarp after it is gone into operation 6 years in footpath R=8990mm, girth 56486mm, are that analysis upwarps reason and resists it
Persistently upwarp, devise the blast furnace base protection system of the present embodiment：
A, installation：
4 groups of 16 pressure sensitive devices 32 and 108 crab-bolt pressue devices are uniformly distributed in 4 directions of blast furnace base circumference
2；It is 1 group per 4 pressure sensors 32, is divided into into 4 groups and connects 4 instrument boxs respectively, the signal of pressure sensor 32 accesses instrument
Weight transmitter in case, by weight transmitter data signal is converted into, then sends weighing instrument to, and weighing instrument can be same
When show the pressure signal of each pressure sensor 32 and the gross pressure of 4 pressure sensors 32, and marked by 4～20mA
Quasi- analog signalses or bus signals Long Distant Transmit are to control system.
It is centered around 16 directions of blast furnace base circumference to be uniformly distributed, insertion depth is respectively 2 of 1000mm and 2000mm
Thermal resistance, respectively interior thermal resistance and outer thermal resistance, 32 thermal resistance distribution maps are shown in Fig. 6, after being plugged, furnace bottom H fine strains of millet 9 with upwarp
High heat conduction gravity flow pouring material is irrigated in gap between furnace bottom shrouding 5；
Nut A23 is installed by torque spanner fastening during installation to pressurize crab-bolt pressue device 2 and pressure sensitive device 3,
And fasten by same torque, keep crab-bolt pressue device 2 and the close uniform pressure of pressure sensitive device 3；It is tight by torque spanner
Guan County loading nut A23 observes the adjustment of the data variation of pressure sensor 32 and shows that weight arrives 15T or so simultaneously.So can be similar to
It is 108*15T=1620T that 108 pressing plates play protection pressure to drop-bottom.
B, pressure, temperature parameter model are set up：
Detect that pressure data makes special furnace bottom model picture and carries out monitor in real time according to each point.And real time data is entered
Row collection and record, real time second level monitoring curve is formulated (containing 4 directional pressure detections of drop-bottom for each changes in process parameters
With bottom temperature, furnace top pressure, wind pushing temperature) while showing that 1 minute average data of average data per minute and each data makes
Whole day curve；Generate each data average data form of whole day daily to be easy to make every monthly average form.
Per group of outer resistance and temperature value is set as into TEn1, interior resistance and temperature value is set as TEn2, then 16 outer thermoelectricity
Resistance temperature value is followed successively by TE011、TE021、TE031、TE041……TE161, corresponding 16 interior resistance and temperature values are followed successively by TE012、
TE022、TE032、TE042……TE162；
Calculate every group of thermal resistance mean value TAVG1, TAVG2,
Calculate each point for measuring temperature (6) temperature TEnmWith cell mean TAVGmDifference TDnm：
TDnm=TEnm-TAVGmFormula (III)；
TD011=TE011-TAVG1Formula (IV)；
Note：N --- value 01,02 ... ..., 16, represent per group of 16 thermal resistances；
M --- value 1,2, represents respectively outer, interior thermal resistance；
Formula (III) is TDnmGeneral formula, formula (IV) is with thermal resistance TE011As a example by deviation calculate；
According to blast furnace technology situation, the Maximum Permissible Temperature Difference TD of every group of thermal resistance is calculatedMAX1And TDMAX2；When certain thermoelectricity
The TD of resistancenmAbsolute value be more than TDMAXm, then the thermal resistance send " relative temperature difference overload alarm " TRnm=TRUE：
if(abs(TDnm)>=TDMAXm)TRnm=TRUE formula (V)；
If resistance and temperature TEmnMore than this group of desired temperature TSm, then " temperature over-range warning " TA is sentnm：
if(TDnm>=TSm)TAnm=TRUE formula (VI)；
Every group of desired temperature TSmArranged according to production technology and characteristics of blast furnace；
C, judgment mode：
The corresponding weight sum data of four pressure sensors 32 detection each point weight change situation, example are read in control system
As weight shows that close 70% range sends warning site inspection, loosen corresponding LOAD CELLS region nut A23 and record
This region and other direction corresponding force squares and numerical value change of weighing.
Arbitrary thermal resistance sends warning, that is, whether its week neighbour's thermal resistance is judged simultaneously in alarm condition, if neighbour is hot
Resistance is all reported to the police, and is sent and is reported to the police again：Once i.e. TAnmWarning is sent, 3 thermal resistance (TA for judging its neighbour are neededn-1m,
TAn+1m, TAnm+1Or TAnm-1) whether report to the police, if this same alarm of 4 thermal resistance, that is, send and report to the police again, adjusting process parameter is prevented
The generation of accident；For example：TA051Warning is sent, then judges TA041, TA061, TA052Whether it is TRUE, if being all TRUE if this 4 points
Send and report to the police again；
C, record statistics：Summarize drop-bottom of the blast furnace under various working conditions and rise variation of stress, to provide
Stress parameters under the conditions of higher operating mode provide process parameters.Real time data is acquired and is recorded, for each technique
Parameters variation formulates monitoring curve.Monitor in real time is carried out according to the furnace bottom model picture that each point detection temperature data creating is special.
And real time data is acquired and is recorded, formulate real time second level monitoring curve for each changes in process parameters and (contain drop-bottom
32 temperature detections upwarp pressure with furnace top pressure, wind pushing temperature, drop-bottom) while showing one hour；Average data per minute
Whole day curve is made with 1 minute average data of each data；Generate each data average data form of whole day daily to be easy to make monthly
Average form.So as to summarize bottom temperature Changing Pattern of the blast furnace under various working conditions, to provide in higher operating mode bar
Bottom temperature parameter under part provides process parameters, thoroughly finds out the main cause that furnace bottom is upwarped.
The application of a kind of blast furnace base protection system of the present embodiment, by October 1st, 2015 to October 20
Continuous data is gathered, and the relevant temperature as shown in Fig. 8～11, pressure data are the mean values on the same day, by Fig. 9,10 and
11, it can be seen that furnace bottom shrouding upwarps pressure and furnace top pressure, wind pushing temperature obvious corresponding relation, illustrate furnace top pressure,
Wind pushing temperature is bigger, and it is bigger that furnace bottom shrouding upwarps pressure, and as seen from Figure 8, furnace bottom shrouding upwarps pressure to furnace bottom shrouding
Temperature also has a certain impact, although it is little that temperature curve fluctuation upwarps pressure oscillation compared with furnace bottom shrouding, but October 2 and October 11
There are temperature value twice and alarm temperature value to overlap day respectively, trigger yellow alarm device, and this two days, it is just furnace bottom shrouding
When upwarping pressure oscillation maximum.Certainly, the temperature fluctuation of furnace bottom shrouding is little, has certain relation with the performance of castable, and also having can
Energy thermal conductivity factor is undesirable.
4 curve maps can substantially be analyzed and determine the meaning for upwarping furnace bottom shrouding bottom temp more than, by furnace bottom
Shrouding bottom temp, the detection of pressure and alarm temperature, the setting of pressure, then controlled by adjusting furnace top pressure and wind pushing temperature
Furnace bottom shrouding processed upwarps pressure, to avoid it from excessively upwarping, causes potential safety hazard and economic loss.
Embodiment 2
A kind of blast furnace base protection system of the present embodiment, its basic structure is theed improvement is that with embodiment 1：
Before perfusion high heat conduction gravity flow pouring material, the even circumferential distribution hold down gag 4 in blast furnace bottom surface, as shown in figure 5, the hold down gag
4 main body section is in left-right asymmetry " soil " font, including pressing plate B43 parallel to each other and substrate 44, and through pressing plate
The bolt 41 being fixedly connected on after B43 on substrate 44；And the height of pressing plate B43 is adjusted by nut B42；The substrate 44 is inserted
Upwarp the bottom of furnace bottom shrouding 5 and furnace bottom H fine strains of millet 9 are fixedly connected by welding, and be pressed in by pressing plate B43 and upwarp on furnace bottom shrouding 5
The periphery for sticking up, rotation nut B42 compactings upwarp furnace bottom shrouding 5；The junction of the bolt 41 and substrate 44, the both sides of bolt 41 point
It is not welded with gusset A45 and gusset B46；
The accuracy and the further checking to conclusion of measuring pressure and temperature, the Blast Furnace Bottom of the present embodiment in order to ensure
Plate protection system is adjusted to the dispensing of castable：SiC, 90 parts；Aqueous binders, 25 parts；Corundum, 14 parts；Water reducer
With totally 1 part of dispersant.By detection, { 100 DEG C, (200 DEG C × 24h) } of its thermal conductivity factor is 13w/m.k, through simulated test,
It was found that the curve fluctuation of furnace bottom shrouding temperature and other parameters reaches unanimity, the complicated factor due to being blast furnace bottom, it is also contemplated that
The rupture strength and compression strength of castable, it is impossible to raising simply its thermal conductivity, and ignore other attributes.The spy of the castable
Point is that 1. compressive resistance is high；2. good fluidity, meets execution conditions；3. Linear change rate is low.Its technical requirement such as following table institute
Show：
| Project | Unit | Index request | Remarks |
| Unit weight | g/cm3 | ≥2.2 | |
| 110 DEG C × 24h of rupture strength | MPa | ≥3.0 | |
| 110 DEG C × 24h of compression strength | MPa | ≥20 | |
| 100 DEG C of thermal conductivity factor, (200 DEG C × 24h) | w/m.k | ≥10 |
Embodiment 3
A kind of blast furnace base protection system of the present embodiment, its basic structure can use hold down gag 4 with embodiment 2
Replacement directly acts on the crab-bolt pressue device 2 for upwarping furnace bottom shrouding 5；The dispensing of castable is adjusted again：SiC,
85 parts；Aqueous binders, 20 parts；Corundum, 19 parts；Totally 1 part of water reducer and dispersant.By detection, its thermal conductivity factor 100 DEG C,
(200 DEG C × 24h) } it is 12w/m.k, strength grade is C40, and after testing, index also complies with requirement.
Below schematically to the present invention and embodiments thereof be described, the description does not have restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area
Art personnel enlightened by it, in the case of without departing from the invention objective, is designed and the technical scheme without creative
Similar frame mode and embodiment, all should belong to protection scope of the present invention.
Claims (9)
1. a kind of blast furnace base protection system, including pressue device and temperature sensor (11), it is characterised in that：Also include pressure
Power induction installation (3) and castable (6), wherein：
The pressue device directs or through pressure sensitive device (3) and acts on the periphery for upwarping for upwarping furnace bottom shrouding (5)
On；The temperature sensor (11) is arranged at furnace bottom H fine strains of millet (9) and upwarps in the gap between furnace bottom shrouding (5)；The castable
(6) it is filled in furnace bottom H fine strains of millet (9) and upwarps in the gap between furnace bottom shrouding (5)；
The pressue device is crab-bolt pressue device (2), including cast-in fixing bolt (21), pressing plate A (22), nut A (23) and cushion block
(24)；Basis drilling (34) that cast-in fixing bolt (21) bottom is inserted in last furnace shell (10) outside, blast furnace foundation (8) is reserved
Interior, top passes through pressing plate A (22), and is slidably connected with pressing plate A (22)；One end of pressing plate A (22) bottom face is pressed in cushion block (24)
Upper surface, the other end directs or through pressure sensitive device (3) and acts on the periphery for upwarping for upwarping furnace bottom shrouding (5), its
By the screw top of nut A (23) and cast-in fixing bolt (21), down spiral presses for upper surface.
2. blast furnace base protection system according to claim 1, it is characterised in that：Pressure sensitive device (3) bag
Include top board (31), pressure sensor (32) and the base plate (33) of horizontal successively from top to bottom；Cushion block (24) bottom is lined with
Plate (25)；The thickness of the backing plate (25) and base plate (33) according to upwarp furnace bottom shrouding (5) upwarp height or crab-bolt adds and press-fits
Put (2) spiral pressure stroke to adjust the balance at pressing plate A (22) two ends.
3. blast furnace base protection system according to claim 2, it is characterised in that：Also include hold down gag (4), it is described
The main body section of hold down gag (4) is in left-right asymmetry " soil " font, including pressing plate B (43) parallel to each other and substrate
(44) bolt (41), and through after pressing plate B (43) being fixedly connected on substrate (44)；And pressure is adjusted by nut B (42)
The height of plate B (43)；Substrate (44) insertion upwarps furnace bottom shrouding (5) bottom and furnace bottom H fine strains of millet (9) by the company of being welded and fixed
Connect, and be pressed in by pressing plate B (43) and upwarp the periphery that furnace bottom shrouding (5) is upwarped, rotation nut B (42) compacting upwarps furnace bottom shrouding
(5)；The junction of the bolt (41) and substrate (44), bolt (41) both sides are respectively welded gusset A (45) and gusset B
(46)。
4. blast furnace base protection system according to claim 3, it is characterised in that：The cushion block (24) and pressure sensing
Device (32) is symmetrical arranged in cast-in fixing bolt (21) both sides；The periphery of the castable (6) is fixed with annular retaining ring (7).
5. blast furnace base protection system according to claim 4, it is characterised in that：The temperature sensor (11) is 2
Individual 1 group, in annular retaining ring (7) to furnace bottom H fine strains of millet (9) and upwarp the gap end between furnace bottom shrouding (5) and be uniformly arranged；The pressure
Force snesor (32) is 1 group of adjacent 4.
6. blast furnace base protection system according to claim 5, it is characterised in that：The temperature sensor (11) is 16
Group, the pressure sensor (32) is 4 groups, the even circumferential distribution in blast furnace bottom surface；The crab-bolt pressue device (2) and compression dress
Put (4) to be uniformly distributed after blast furnace base circumference staggers.
7. blast furnace base protection system according to claim 5, it is characterised in that：The castable (6) is high heat conduction
Gravity flow pouring material, including SiC, corundum, water reducer, dispersant and aqueous binders.
8. blast furnace base protection system according to claim 7, it is characterised in that：The each dispensing of the castable (6)
Parts by weight are：SiC, 80～90 parts；Aqueous binders, 20～30 parts；Corundum, 9～19 parts；Totally 1 part of water reducer and dispersant.
9. blast furnace base protection system according to claim 6, it is characterised in that：Spiral shell is installed by torque spanner fastening
Female A (23) and nut B (42), pressurize to crab-bolt pressue device (2), pressure sensitive device (3) and hold down gag (4), and by same
Sample torque is fastened, and keeps crab-bolt pressue device (2), pressure sensitive device (3) and hold down gag (4) to upwarping furnace bottom shrouding (5)
Upwarp periphery apply uniform pressure；Pressure sensor (32) described in 4 groups connects respectively 4 instrument boxs, pressure sensor (32)
Signal accesses the weight transmitter in instrument box, and by weight transmitter data signal is converted into, then sends weighing instrument to, claims
Weight instrument can simultaneously show the pressure signal of each pressure sensor (32) and the gross pressure of 4 pressure sensors (32),
And by analog signalses or bus signals Long Distant Transmit to control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510762361.4A CN105238895B (en) | 2015-11-10 | 2015-11-10 | Hearth plate protection system for blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510762361.4A CN105238895B (en) | 2015-11-10 | 2015-11-10 | Hearth plate protection system for blast furnace |
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| Publication Number | Publication Date |
|---|---|
| CN105238895A CN105238895A (en) | 2016-01-13 |
| CN105238895B true CN105238895B (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510762361.4A Active CN105238895B (en) | 2015-11-10 | 2015-11-10 | Hearth plate protection system for blast furnace |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58110607A (en) * | 1981-12-24 | 1983-07-01 | Kawasaki Steel Corp | Construction for furnace bottom of blast furnace |
| JP2001348606A (en) * | 2000-06-08 | 2001-12-18 | Kawasaki Steel Corp | Structure for cooling furnace bottom in blast furnace |
| JP2009120945A (en) * | 2007-10-26 | 2009-06-04 | Nippon Steel Engineering Co Ltd | Structure for furnace bottom part in blast furnace |
| CN202830057U (en) * | 2012-10-18 | 2013-03-27 | 武钢集团昆明钢铁股份有限公司 | Gas closure plate for bottom of blast furnace |
| CN203373359U (en) * | 2013-05-22 | 2014-01-01 | 中冶南方工程技术有限公司 | Furnace bottom structure of blast furnace |
| JP5662869B2 (en) * | 2011-05-16 | 2015-02-04 | 新日鉄住金エンジニアリング株式会社 | Blast furnace bottom construction method |
| CN205077077U (en) * | 2015-11-10 | 2016-03-09 | 马鞍山钢铁股份有限公司 | Bottom of blast furnace board protection system |
-
2015
- 2015-11-10 CN CN201510762361.4A patent/CN105238895B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58110607A (en) * | 1981-12-24 | 1983-07-01 | Kawasaki Steel Corp | Construction for furnace bottom of blast furnace |
| JP2001348606A (en) * | 2000-06-08 | 2001-12-18 | Kawasaki Steel Corp | Structure for cooling furnace bottom in blast furnace |
| JP2009120945A (en) * | 2007-10-26 | 2009-06-04 | Nippon Steel Engineering Co Ltd | Structure for furnace bottom part in blast furnace |
| JP5662869B2 (en) * | 2011-05-16 | 2015-02-04 | 新日鉄住金エンジニアリング株式会社 | Blast furnace bottom construction method |
| CN202830057U (en) * | 2012-10-18 | 2013-03-27 | 武钢集团昆明钢铁股份有限公司 | Gas closure plate for bottom of blast furnace |
| CN203373359U (en) * | 2013-05-22 | 2014-01-01 | 中冶南方工程技术有限公司 | Furnace bottom structure of blast furnace |
| CN205077077U (en) * | 2015-11-10 | 2016-03-09 | 马鞍山钢铁股份有限公司 | Bottom of blast furnace board protection system |
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|---|---|
| CN105238895A (en) | 2016-01-13 |
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