CN105219899B - A kind of method for early warning judging Blast Furnace Abnormal Conditions Judgement according to differential static pressure - Google Patents
A kind of method for early warning judging Blast Furnace Abnormal Conditions Judgement according to differential static pressure Download PDFInfo
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Abstract
The invention discloses a kind of method for early warning judging Blast Furnace Abnormal Conditions Judgement according to differential static pressure, the situation of change of the differential static pressure according to blast furnace all directions differing heights, the change of blast furnace overall pressure differential, identify the distribution of movement situation of blast furnace air-flow and stock column using data mining technology in time, infer time and the size of impact working of a furnace change, and then adopt an effective measure the working of a furnace is restored to a normal state in a timely manner the stable and direct motion it is ensured that blast furnace.The present invention is given warning in advance by the change of blast-furnace shaft differential static pressure and hanging and pipeline trip, analyze the position producing the abnormal working of a furnace, targetedly take measures, accomplish advanced processing, so that the abnormal working of a furnace that will occur is eliminated or accident impact is reduced to minimum.
Description
Technical field
The present invention relates to Blast Furnace Abnormal Conditions Judgement forecasting technique field, judge that blast furnace is abnormal in particular to one kind according to differential static pressure
The method for early warning of the working of a furnace.
Background technology
In the operating duty of blast furnace, blowing system is one of which important system, and the adjustment of blast furnace air-flow is related to blast furnace
The quality of direct motion.Blast furnace is a kind of shaft furnace type countercurrent reactor.It is piled into the furnace charge of stock column shape in stove, by upstream
The effect of high temperature reduced gas current, be constantly heated, decompose, reduction, soften, melting, drippage, and ultimately form slag iron melt and
Separate.
Hanging be commonly defined as furnace charge stop decline, persistent period two batch of material not under.Double above hanging is referred to as
Continuous hanging.
Pipeline trip is the performance of the undue development of a certain local air flow of blast furnace section, its stroke and development mainly by
It is deteriorated in crude fuel intensity, powder increases, air quantity is not suitable with permeability of stock column and produces.
The total head difference that traditional determination methods are mainly dependence blast furnace stock column to be judged with the decline expecting chi, is substantially
It is analyzed for beginning condition and result, when sometimes pipeline, pressure reduction can be very low, can clearly be found out by differential static pressure
Blast furnace occurs in that more serious problem, but then inconspicuous from total head difference, easily misleads to operator.Current blast furnace air-flow
Abnormal working of a furnace determination methods are mainly sentenced according to the blowing system of bottom house and the cross temperature of furnace roof or infrared imaging
Disconnected, belong to initial control and the result detection of blast furnace air-flow, the process detection in bottom to top for the air-flow does not have substantially, leads to stove
When condition abnormal, processing means are delayed, processed after easily occurring extremely producing result again.
Blast furnace is affected by operation, and equipment affects, and fluctuation in conditions of blast furnace, is also easy to produce the phenomenons such as pipeline trip, hanging, and one
There is hanging in denier, then ton ferrum cost and blast fumance can be made a big impact, give warning in advance and can take corresponding measure in time, keep away
Exempt from the generation of pipeline and hanging, reduce the risk of blast furnace fluctuation.
Content of the invention
The technical problem to be solved is to provide a kind of pre- police judging Blast Furnace Abnormal Conditions Judgement according to differential static pressure
Method, the situation of change of the differential static pressure according to blast furnace all directions differing heights, the change of blast furnace overall pressure differential, using data mining skill
Art identifies the distribution of movement situation of blast furnace air-flow and stock column in time, infers time and the size of impact working of a furnace change, and then takes
The working of a furnace is restored to a normal state in a timely manner the stable and direct motion it is ensured that blast furnace by effective measures.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：According to differential static pressure, one kind judges that blast furnace is different
Often the method for early warning of the working of a furnace, comprises the following steps：
Step 1：Blast furnace is along the circumferential direction divided into several subregions, blast furnace is divided into corresponding height along short transverse simultaneously
Five parts of stove, from blast-furnace tuyere to blast furnace roof region, correspond to respectively from top to bottom the bosh of blast furnace, furnace bosh, restoration of lower stack,
In the middle part of shaft, upper shaft；
Step 2：Obtain the differential static pressure real time data of each subregion above-mentioned by blast-furnace shaft differential static pressure monitoring device；
Step 3：The blast furnace differential static pressure real time data of above-mentioned regional is built into sample, by the sample in 6～12 months
Originally it is added in operation of blast furnace total Database, the differential static pressure change being simultaneous for the working of a furnace in abnormal period is analyzed comparing；
Step 4：Using available data digging technology, the blast furnace differential static pressure real time data in operation of blast furnace total Database is entered
Row data mining, finally makes the highly interval corresponding corresponding static pressure difference data of each blast furnace, specifies differential static pressure data variation simultaneously
During more than 15kPa, illustrate that abnormal conditions then in blast furnace air flow method, and position differential static pressure change judged,
Judge the abnormal working of a furnace being likely to occur；
Step 5：The numerical range of each highly interval differential static pressure of monitor in real time in operation, judge blast furnace stock column decline with
Whether air flow method is normally reasonable, if the numerical value of differential static pressure exceedes more than 15kPa normal range, produces differential static pressure ripple by corresponding
Dynamic position records in operation of blast furnace data base, judges that position static pressure fluctuation is located at the bosh of blast furnace, furnace bosh, stove
In the middle part of body bottom, shaft, which position of upper shaft；
Step 6：When blast furnace differential static pressure undulation location is in bosh, in combination with the fluctuation situation of cooling wall, cooling wall is no
Substantially fluctuate, the differential static pressure of five in blast furnace short transverse section is uniformly higher, then for blast furnace to heat, take and reduce arranging of furnace temperature
Apply, by blast-melted temperature control in normal range, blast furnace then normally runs；As cooling wall bosh, furnace bosh fluctuation and be more than
50 DEG C of situation, enters step 7；
Step 7：Blast furnace total pressure head is higher than more than normal value 10kpa, then checking is processed, and observes the quiet of each region of blast furnace simultaneously
Pressure reduction situation of change；When cooling wall fluctuation is more than 50 DEG C, furnace temperature can reduce in one hour in half an hour, molten iron physical thermal meeting
Reduce in 1 hour in half an hour, take the measure improving furnace temperature, this stage is the period that the abnormal working of a furnace occurs, also for exception
The initial stage of the working of a furnace, by open gas flow, furnace temperature measure is controlled to eliminate the abnormal working of a furnace, such as quiet by air-flow adjustment and furnace temperature adjustment
Pressure reduction returns to normal value, then flow process terminates, and such as differential static pressure fluctuates to furnace bosh development, enters step 8；
Step 8：When blast furnace differential static pressure undulation location occurs in furnace bosh, illustrate that pipeline in furnace bosh local, in conjunction with that time
Overall pressure differential level judge, when total pressure head be less than normal pressure difference when, carry out observe follow the tracks of, heat regulation is carried out according to furnace temperature；
When overall pressure differential is higher than normal pressure difference, checking is needed to control pressure difference level in normal pressure difference lower limit, to avoid differential static pressure to fluctuate
Expand, this process is the shaping age of the abnormal working of a furnace, process is proper only to occur little slide rule, and after slide rule, differential static pressure returns recovery
Normally, flow process terminates, and will not produce considerable influence to the working of a furnace；During as differential static pressure further up into restoration of lower stack, enter step
9；
Step 9：When blast furnace differential static pressure undulation location is in restoration of lower stack, need with reference to cooling wall fluctuation situation and coal gas profit
It is analyzed with rate situation, when such as cooling wall fluctuation is more than 50 DEG C, with the decline of gas utilization rate, amplitude is less than 1%,
Then need to control overall pressure differential in normal pressure difference lower limit 5kPa-10kPa, illustrate that local pipe generates, and be difficult to eliminate, need
Carry out checking and increase heat treatment, it is to avoid the generation expanding with other abnormal working of a furnaces of pipeline, this stage is that the abnormal working of a furnace is sent out
In the duration of an exhibition, using measures such as checking or pathogenic wind-warm, blast furnace is likely to occur larger slide rule and with little pipeline, slide rule and little
After pipeline, top temperature can drastically raise, and material chi can collapse and expect more than 0.5m, and blast can skyrocket, and need to control pressure reduction to avoid hanging, collapse
After material, differential static pressure recovers normal, and flow process terminates, and such as differential static pressure up develops in the middle part of shaft or top again, enters step 10；
Step 10：During as dislocation in blast-furnace shaft, top, gas analysis real time data is observed simultaneously,
Gas utilization rate raises, simultaneously on the weak side to furnace roof central gas stream, illustrates that top breathability is deteriorated, takes the side of open center air-flow
Formula, increases the addition of central coke；As larger in top static pressure fluctuation, gas utilization rate declines more than 1%, and checking controls, and prevents
Only blast skyrockets and causes hanging, when coal gas is using drastically declining more than 2%, illustrates the larger pipeline trip in local, then adopts
Take checking 10%-15% process, take on thermal system simultaneously and propose furnace temperature measure, hanging and large-scale pipeline stove now easily occur
Condition, adjusts stockline depth at furnace throat for the furnace charge, position and coke load by Charge control immediately, adds additional Jiao into blast furnace
Carbon, and by adjusting the pathogenic wind-warm of bottom house aerator, injecting coal quantity and reducing the measures such as blast humidity by the percent mass of Si
Ratio controls 0.3%～0.5%, guarantees the total pressure head of blast furnace below normal pressure difference by reducing air blast air quantity, reduces high
Furnace charge post overall pressure differential, it is to avoid after the material that occurs collapsing, stock column pressure skyrockets the hanging causing.
In described step 1, blast furnace is along the circumferential direction divided into 3-4 subregion.
Beneficial effects of the present invention：Given warning in advance by the change of blast-furnace shaft differential static pressure and hanging and pipeline trip occur,
Analyze the position producing the abnormal working of a furnace, targetedly take measures, accomplish advanced processing, make the abnormal working of a furnace that will occur
Eliminate or accident impact is reduced to minimum.
Brief description
Fig. 1 is the blast furnace major trend picture being controlled not according to the inventive method.
Fig. 2 is the blast furnace differential static pressure trend (circumferencial direction takes triadic mean value) being controlled not according to the inventive method.
Fig. 3 is the blast furnace major trend picture being controlled according to the inventive method.
Fig. 4 is the blast furnace differential static pressure trend (circumferencial direction takes triadic mean value) being controlled according to the inventive method.
Specific embodiment
With reference to the accompanying drawings and detailed description the present invention is described in further detail：
D of the present invention judges the method for early warning of Blast Furnace Abnormal Conditions Judgement according to differential static pressure, comprises the following steps：
Step 1：Blast furnace is along the circumferential direction divided into several subregions, blast furnace is divided into corresponding height along short transverse simultaneously
Five parts of stove, from blast-furnace tuyere to blast furnace roof region, correspond to respectively from top to bottom the bosh of blast furnace, furnace bosh, restoration of lower stack,
In the middle part of shaft, upper shaft；
Step 2：Obtain the differential static pressure real time data of each subregion above-mentioned by blast-furnace shaft differential static pressure monitoring device；
Step 3：The blast furnace differential static pressure real time data of above-mentioned regional is built into sample, by the sample in 6～12 months
Originally it is added in operation of blast furnace total Database, the differential static pressure change being simultaneous for the working of a furnace in abnormal period is analyzed comparing；
Step 4：Using available data digging technology, the blast furnace differential static pressure real time data in operation of blast furnace total Database is entered
Row data mining, finally makes the highly interval corresponding corresponding static pressure difference data of each blast furnace, specifies differential static pressure data variation simultaneously
During more than 15kPa, illustrate that abnormal conditions then in blast furnace air flow method, and position differential static pressure change judged,
Judge the abnormal working of a furnace being likely to occur；
Step 5：The numerical range of each highly interval differential static pressure of monitor in real time in operation, judge blast furnace stock column decline with
Whether air flow method is normally reasonable, if the numerical value of differential static pressure exceedes more than 15kPa normal range, produces differential static pressure ripple by corresponding
Dynamic position records in operation of blast furnace data base, judges that position static pressure fluctuation is located at the bosh of blast furnace, furnace bosh, stove
In the middle part of body bottom, shaft, which position of upper shaft；
Step 6：When blast furnace differential static pressure undulation location is in bosh, in combination with the fluctuation situation of cooling wall, cooling wall is no
Substantially fluctuate, the differential static pressure of five in blast furnace short transverse section is uniformly higher, then for blast furnace to heat, take and reduce arranging of furnace temperature
Apply, by blast-melted temperature control in normal range, blast furnace then normally runs；As cooling wall bosh, furnace bosh fluctuation and be more than
50 DEG C of situation, enters step 7；
Step 7：Blast furnace total pressure head is higher than more than normal value 10kpa, then checking is processed, and observes the quiet of each region of blast furnace simultaneously
Pressure reduction situation of change；When cooling wall fluctuation is more than 50 DEG C, furnace temperature can reduce in one hour in half an hour, molten iron physical thermal meeting
Reduce in 1 hour in half an hour, take the measure improving furnace temperature, this stage is the period that the abnormal working of a furnace occurs, also for exception
The initial stage of the working of a furnace, by open gas flow, furnace temperature measure is controlled to eliminate the abnormal working of a furnace, such as quiet by air-flow adjustment and furnace temperature adjustment
Pressure reduction returns to normal value, then flow process terminates, and such as differential static pressure fluctuates to furnace bosh development, enters step 8；
Step 8：When blast furnace differential static pressure undulation location occurs in furnace bosh, illustrate that pipeline in furnace bosh local, in conjunction with that time
Overall pressure differential level judge, when total pressure head be less than normal pressure difference when, carry out observe follow the tracks of, heat regulation is carried out according to furnace temperature；
When overall pressure differential is higher than normal pressure difference, checking is needed to control pressure difference level in normal pressure difference lower limit, to avoid differential static pressure to fluctuate
Expand, this process is the shaping age of the abnormal working of a furnace, process is proper only to occur little slide rule, and after slide rule, differential static pressure returns recovery
Normally, flow process terminates, and will not produce considerable influence to the working of a furnace；During as differential static pressure further up into restoration of lower stack, enter step
9；
Step 9：When blast furnace differential static pressure undulation location is in restoration of lower stack, need with reference to cooling wall fluctuation situation and coal gas profit
It is analyzed with rate situation, when such as cooling wall fluctuation is more than 50 DEG C, with the decline of gas utilization rate, amplitude is less than 1%,
Then need to control overall pressure differential in normal pressure difference lower limit 5kPa-10kPa, illustrate that local pipe generates, and be difficult to eliminate, need
Carry out checking and increase heat treatment, it is to avoid the generation expanding with other abnormal working of a furnaces of pipeline, this stage is that the abnormal working of a furnace is sent out
In the duration of an exhibition, using measures such as checking or pathogenic wind-warm, blast furnace is likely to occur larger slide rule and with little pipeline, slide rule and little
After pipeline, top temperature can drastically raise, and material chi can collapse and expect more than 0.5m, and blast can skyrocket, and need to control pressure reduction to avoid hanging, collapse
After material, differential static pressure recovers normal, and flow process terminates, and such as differential static pressure up develops in the middle part of shaft or top again, enters step 10；
Step 10：During as dislocation in blast-furnace shaft, top, gas analysis real time data is observed simultaneously,
Gas utilization rate raises, simultaneously on the weak side to furnace roof central gas stream, illustrates that top breathability is deteriorated, takes the side of open center air-flow
Formula, increases the addition of central coke；As larger in top static pressure fluctuation, gas utilization rate declines more than 1%, and checking controls, and prevents
Only blast skyrockets and causes hanging, when coal gas is using drastically declining more than 2%, illustrates the larger pipeline trip in local, then adopts
Take checking 10%-15% process, take on thermal system simultaneously and propose furnace temperature measure, hanging and large-scale pipeline stove now easily occur
Condition, adjusts stockline depth at furnace throat for the furnace charge, position and coke load by Charge control immediately, adds additional Jiao into blast furnace
Carbon, and by adjusting the pathogenic wind-warm of bottom house aerator, injecting coal quantity and reducing the measures such as blast humidity by the percent mass of Si
Ratio controls 0.3%～0.5%, guarantees the total pressure head of blast furnace below normal pressure difference by reducing air blast air quantity, reduces high
Furnace charge post overall pressure differential, it is to avoid after the material that occurs collapsing, stock column pressure skyrockets the hanging causing.
In described step 1, blast furnace is along the circumferential direction divided into 3-4 subregion.
The present invention passes through five sections of differential static pressure changes from air port region to furnace roof region for the real-time monitoring blast furnace, by 6-12
The data of the moon is analyzed and summarized, and is contrasted in combination with data during the abnormal working of a furnace, sums up differential static pressure and changes for height
The pests occurrence rule of the stove exception working of a furnace, by adjusting in advance, it is to avoid the appearance of the abnormal working of a furnace.
It is specifically described below taking sky steel as a example：
Step 1：Blast furnace is along the circumferential direction divided into several subregions, generally 3-4, simultaneously will be highly square for blast furnace edge
To five parts being divided into corresponding blast furnace process region.Totally 6 layers of as current in sky steel blast furnace static pressure point, respectively air port layer, 25 meters, 29
Rice, 32 meters, 36 meters, furnace roof layer, circumferencial direction divides 3 subregions, respectively 52 °, 184 °, 293 °.
Step 2：Obtain the differential static pressure of each subregion above-mentioned by blast-furnace shaft differential static pressure monitoring device, such as bosh region,
The differential static pressure real time data of restoration of lower stack region and shaft upper zone；
Step 3：The blast furnace cooling stave temperature real time data of above-mentioned regional is built into sample, by 6～12 months
Sample be added in operation of blast furnace total Database, be simultaneous for abnormal period the working of a furnace differential static pressure change be analyzed compare
Relatively；
Step 4：Using available data digging technology, the blast furnace differential static pressure real time data in operation of blast furnace total Database is entered
Row data mining, finally makes the highly interval corresponding corresponding static pressure difference data of each blast furnace, specifies differential static pressure data variation simultaneously
During more than 15kpa, illustrate that abnormal conditions then in blast furnace air flow method, and position differential static pressure change is judged.
Step 5：The numerical range of each highly interval differential static pressure of monitor in real time in operation, judge blast furnace stock column decline with
Whether air flow method is normally reasonable, if the numerical value of differential static pressure exceedes more than 15kpa normal range, produces differential static pressure ripple by corresponding
Dynamic position records in operation of blast furnace data base, judges position static pressure fluctuation, is top or bottom.
Step 6：When blast furnace differential static pressure undulation location is in the bottom of whole stock column, when that is, air port region is to 25m position, can
With the fluctuation situation with reference to cooling wall, judge the operation trend of blast furnace, be the static pressure fluctuation which kind of reason causes, the static pressure of entirety
Difference is higher be then blast furnace to heat, the measure reducing furnace temperature should be taken, the too high then checking of pressure reduction is processed；As neighbouring interval it
Before there occurs the conversion of differential static pressure, two such as adjacent interval pressure reduction summations are constant, but two interval data change,
Bottom reduces, and top rises, then change in explanation air-flow, and such as total pressure head, within normal range, can observe differential static pressure development
Trend,
If dislocation is when middle and upper part, gas analysis real time data is observed, gas utilization rate raises simultaneously, with
When on the weak side to furnace roof central gas stream, illustrate that top breathability is deteriorated, the mode of open center air-flow should be taken, increase central coke
Addition.As larger in top static pressure fluctuation, gas utilization rate declines more than 1%, illustrates that air-flow occurs abnormal, there is local pipe
Road, should control pressure reduction below regime values by suitable checking, prevent line clogging blast from skyrocketing and cause hanging, when coal gas is using anxious
Acute decline more than 2%, illustrates the larger pipeline trip in local, then significantly checking should be taken to process, simultaneously on thermal system
Take and propose furnace temperature measure, when fluctuation occurs, enter step 7.
Step 7：Stockline depth at furnace throat for the furnace charge, position and coke load are adjusted by Charge control, into blast furnace
Plus additional coke, and by adjust the pathogenic wind-warm of bottom house aerator, injecting coal quantity and reduce the measures such as blast humidity will【S i】
Control 0.3%～0.5%.Guarantee the total pressure head of blast furnace below normal pressure difference by reducing air blast air quantity, reduce blast furnace
Stock column overall pressure differential, it is to avoid after the material that occurs collapsing, stock column pressure skyrockets the hanging causing.
Under normal circumstances, the differential static pressure change of blast furnace each several part less, is fluctuated in the range of very little, is shown blast furnace stock column
Breathability uniformly, stock column stably declines, and when air-flow in local, judges the size of local air flow, can pass through shaft quiet
The change of pressure, the change of which level starts to cause, where the occurring of stock column, and what reason causes, differential static pressure
Change that how many scopes can cause that what situation has quantitative judgement.
The following table of static pressure difference of each several part under normal circumstances：
| Differential static pressure | Pressure difference |
| 36 meters are arrived furnace roof | 30kpa |
| 32m-36m | 10kpa |
| 29m-32m | 10kpa |
| 25m-29m | 15kpa |
| Air port -25m | 105kpa |
Upper table is under normal circumstances, in fact it could happen that air port is to the notable feelings raising of 25m scope differential static pressure in smelting process
Condition, illustrates that bottom pressure reduction raises, such as reaches more than 125kpa, now material chi declines slowly, then explanation bottom pressure reduction is too high, needs
Take measures to reduce bottom pressure reduction, total pressure head is too high, and the situation of bottom hanging occurs,.
In the case that bottom pressure reduction persistently raises, differential static pressure is likely to occur the process changed upwards, locally pipeline,
As 25m-29m raises, and then toward top development, such as rise to 32 36, and the pressure reduction of 36m to furnace roof also rises, easily therewith
The situation of top hanging occurs.
General bottom pressure reduction raises the situation being not easy hanging, and overall stock column pressure reduction rising can lead to local static pressure
, that is, the small pipeline of local in the conversion of difference, successively changes toward top, both the differential static pressure on top can increase, when top three
Individual differential static pressure persistently raises, and summation, more than 85kpa, top hanging easily, and 2, top pressure reduction raises, summation more than 60,
Top hanging easily occurs, top hanging easily more than 45 in 36m to furnace roof, the complexity processing hanging is more to lean on
The hanging on nearly top is less susceptible to process.
As shown in Figure 1-2, it is the differential static pressure trend of a hanging of blast furnace and the trend of blast furnace items major parameter, pass through
As can be seen that basic direct motion before blast furnace at that time, after fluctuation in differential static pressure, top pressure reduction steeply rises this two figures, hanging
Before on not two pressure reduction sums reached 85kpa although the not a height of 165kpa of overall pressure differential, less than normal value, but still occur outstanding
Material, and not normal longer, if checking controls in advance, the generation of blast furnace hanging can be controlled in time.
When as shown in Figure 3-4, for there is differential static pressure fluctuation, blast furnace situation after taking measures in time.By taking measures,
After checking, smooth operation of furnace situation is controlled in time.
By production practices, the present invention by the change of differential static pressure, conditions of blast furnace can be analyzed judge, make and
When accurate adjustment mode it is ensured that the direct motion steady in a long-term of blast furnace, it is to avoid the appearance of large-scale fluctuation, be avoided that hanging in 4- within 1 year
5 times, about 5,000,000 yuan of economic benefit.
Embodiment described above is merely to illustrate technological thought and the feature of the present invention, its object is to make in the art
Technical staff it will be appreciated that present disclosure and according to this implement it is impossible to only to limit the patent model of the present invention with the present embodiment
Enclose, equal change or modification that is, all disclosed spirit is made, still fall in the scope of the claims of the present invention.
Claims (2)
1. a kind of the method for early warning of Blast Furnace Abnormal Conditions Judgement is judged it is characterised in that comprising the following steps according to differential static pressure：
Step 1：Blast furnace is along the circumferential direction divided into several subregions, blast furnace is divided into corresponding blast furnace along short transverse simultaneously
Five parts, from blast-furnace tuyere to blast furnace roof region, correspond to the bosh of blast furnace, furnace bosh, restoration of lower stack, shaft from top to bottom respectively
Middle part, upper shaft；
Step 2：Obtain the differential static pressure real time data of each subregion above-mentioned by blast-furnace shaft differential static pressure monitoring device；
Step 3：The blast furnace differential static pressure real time data of above-mentioned regional is built into sample, the sample in 6～12 months is added
Enter in operation of blast furnace total Database, the differential static pressure change being simultaneous for the working of a furnace in abnormal period is analyzed comparing；
Step 4：Using available data digging technology, line number is entered to the blast furnace differential static pressure real time data in operation of blast furnace total Database
According to excavation, finally make the highly interval corresponding corresponding static pressure difference data of each blast furnace, regulation differential static pressure data variation exceedes simultaneously
During 15kPa, illustrate that abnormal conditions then in blast furnace air flow method, and position differential static pressure change is judged, judge
The abnormal working of a furnace being likely to occur；
Step 5：The numerical range of each highly interval differential static pressure of monitor in real time in operation, judges that blast furnace stock column declines and air-flow
Whether distribution is normally reasonable, if the numerical value of differential static pressure exceedes more than 15kPa normal range, produces what differential static pressure fluctuated by corresponding
Position records in operation of blast furnace data base, judge the position that static pressure fluctuation occurs be located at the bosh of blast furnace, furnace bosh, under shaft
In the middle part of portion, shaft, which position of upper shaft；
Step 6：When blast furnace differential static pressure undulation location is in bosh, in combination with the fluctuation situation of cooling wall, cooling wall is no obvious
Fluctuation, the differential static pressure of five in blast furnace short transverse section is uniformly higher, then for blast furnace to heat, take the measure reducing furnace temperature,
By blast-melted temperature control in normal range, blast furnace then normally runs；As cooling wall bosh, furnace bosh fluctuation and be more than 50
DEG C situation, enter step 7；
Step 7：Blast furnace total pressure head is higher than more than normal value 10kPa, then checking is processed, and observes the differential static pressure in each region of blast furnace simultaneously
Situation of change；When cooling wall fluctuation is more than 50 DEG C, furnace temperature can reduce in one hour in half an hour, and molten iron physical thermal can be half
Hour reduced in 1 hour, took the measure improving furnace temperature, and this stage is the period that the abnormal working of a furnace occurs, also for the abnormal working of a furnace
Initial stage, by open gas flow, control furnace temperature measure to eliminate the abnormal working of a furnace, such as differential static pressure adjusted by air-flow adjustment and furnace temperature
Return to normal value, then flow process terminates, such as differential static pressure fluctuates to furnace bosh development, enters step 8；
Step 8：When blast furnace differential static pressure undulation location occurs in furnace bosh, illustrate that pipeline in furnace bosh local, total in conjunction with that time
Body pressure difference level judges, when total pressure head is less than normal pressure difference, carries out observing and follows the tracks of, carry out heat regulation according to furnace temperature；When total
When body pressure reduction is higher than normal pressure difference, checking is needed to control pressure difference level in normal pressure difference lower limit, to avoid differential static pressure fluctuation to expand,
This process is the shaping age of the abnormal working of a furnace, and process is proper only to occur little slide rule, and after slide rule, differential static pressure recovers normal, stream
Journey terminates, and will not produce considerable influence to the working of a furnace；During as differential static pressure further up into restoration of lower stack, enter step 9；
Step 9：When blast furnace differential static pressure undulation location is in restoration of lower stack, need with reference to cooling wall fluctuation situation and gas utilization rate
Situation is analyzed, and when such as cooling wall fluctuation is more than 50 DEG C, with the decline of gas utilization rate, amplitude is less than 1%, then needs
Overall pressure differential to be controlled, in normal pressure difference lower limit 5kPa-10kPa, illustrates that local pipe generates, and is difficult to eliminate, need into
Row checking and increase heat treatment, it is to avoid the generation expanding with other abnormal working of a furnaces of pipeline, this stage is that the abnormal working of a furnace develops
Phase, using checking or reduce pathogenic wind-warm measure, blast furnace is likely to occur larger slide rule and with little pipeline, slide rule and little
After pipeline, top temperature can drastically raise, and material chi can collapse and expect more than 0.5m, and blast can skyrocket, and need to control pressure reduction to avoid hanging, collapse
After material, differential static pressure recovers normal, and flow process terminates, and such as differential static pressure up develops in the middle part of shaft or top again, enters step 10；
Step 10：During as differential static pressure dislocation in blast-furnace shaft, top, gas analysis real time data is seen simultaneously
Examine, gas utilization rate raises, simultaneously on the weak side to furnace roof central gas stream, illustrate that top breathability is deteriorated, take open center air-flow
Mode, increase central coke addition；As larger in top static pressure fluctuation, gas utilization rate declines more than 1%, checking control
System, prevents blast from skyrocketing and causes hanging, when coal gas is using drastically declining more than 2%, illustrates the larger pipeline trip in local,
Then take checking 10%-15% process, take on thermal system simultaneously and propose furnace temperature measure, hanging and large-scale now easily occurs
The pipeline working of a furnace, adjusts stockline depth at furnace throat for the furnace charge, position and coke load by Charge control immediately, adds into blast furnace
Additional coke, and by adjusting the pathogenic wind-warm of bottom house aerator, injecting coal quantity and reducing blast humidity measure by the quality of Si
Percentage ratio controls 0.3%～0.5%, guarantees the total pressure head of blast furnace below normal pressure difference by reducing air blast air quantity, fall
Low blast furnace stock column overall pressure differential, it is to avoid after the material that occurs collapsing, stock column pressure skyrockets the hanging causing.
2. according to claim 1 the method for early warning of Blast Furnace Abnormal Conditions Judgement is judged according to differential static pressure it is characterised in that described
In step 1, blast furnace is along the circumferential direction divided into 3-4 subregion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510728850.8A CN105219899B (en) | 2015-10-30 | 2015-10-30 | A kind of method for early warning judging Blast Furnace Abnormal Conditions Judgement according to differential static pressure |
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|---|---|---|---|
| CN201510728850.8A CN105219899B (en) | 2015-10-30 | 2015-10-30 | A kind of method for early warning judging Blast Furnace Abnormal Conditions Judgement according to differential static pressure |
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| CN110245690A (en) * | 2019-05-23 | 2019-09-17 | 中国地质大学（武汉） | A kind of conditions of blast furnace recognition methods and system based on fuzzy clustering |
| CN111523255B (en) * | 2020-06-28 | 2022-03-22 | 攀钢集团攀枝花钢钒有限公司 | Blast furnace forward index calculation method based on movement range |
| CN112111618B (en) * | 2020-09-22 | 2022-06-03 | 攀钢集团研究院有限公司 | Blast furnace burden descending uniformity judgment and early warning method and system |
| CN112961949B (en) * | 2021-03-12 | 2022-11-18 | 鞍钢股份有限公司 | Method for rapidly judging pipeline stroke of blast furnace |
| CN114941044B (en) * | 2022-05-25 | 2024-03-01 | 江苏省沙钢钢铁研究院有限公司 | 2000-level high furnace pipeline prediction and treatment method |
| CN115305299A (en) * | 2022-08-05 | 2022-11-08 | 广东韶钢松山股份有限公司 | Blast furnace pipeline airflow pre-judging and processing method and device |
| CN116064980B (en) * | 2023-01-17 | 2023-12-05 | 马鞍山钢铁股份有限公司 | Method for representing blast furnace airflow by using pressure gradient |
| CN116875749A (en) * | 2023-08-10 | 2023-10-13 | 广东中南钢铁股份有限公司 | Blast furnace sliding material heat supplementing method, device, equipment and storage medium |
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